CN119716533B

CN119716533B - Intelligent on-line monitoring method and system for high-voltage vacuum circuit breaker

Info

Publication number: CN119716533B
Application number: CN202510223884.5A
Authority: CN
Inventors: 刘建刚; 李东明; 张锋波; 胡亚刚; 田素佩; 田文成
Original assignee: Xi'an Aier Energy Equipment Co ltd
Current assignee: Xi'an Aier Energy Equipment Co ltd
Priority date: 2025-02-27
Filing date: 2025-02-27
Publication date: 2025-04-25
Anticipated expiration: 2045-02-27
Also published as: CN119716533A

Abstract

The present invention relates to the field of electrical equipment monitoring, and is an intelligent online monitoring method and system for high-voltage vacuum circuit breakers, comprising: receiving a circuit breaker control signal, using a started electromagnetic coil to perform an electromagnetic pushing operation on a moving contact transmission rod to obtain a moving transmission rod, performing a monitoring operation on the moving transmission rod based on a preset monitoring frequency and a displacement sensor, performing a speed analysis on the displacement sequence to obtain a displacement fluctuation index and an average displacement speed, calculating a displacement failure rate based on the displacement fluctuation index and the average displacement speed, and if the displacement failure rate is less than or equal to a displacement failure threshold, performing a vacuum inspection operation on a vacuum interrupter using a piezoelectric sensor, an ionization sensor, and a thermal conductivity sensor to obtain an arc extinguishing vacuum index, and completing online monitoring of the high-voltage vacuum circuit breaker when the circuit breaker monitoring platform receives a safety signal or a warning signal. The present invention can improve the real-time performance and accuracy of monitoring high-voltage vacuum circuit breakers.

Description

Intelligent on-line monitoring method and system for high-voltage vacuum circuit breaker

Technical Field

The invention relates to the field of electrical equipment monitoring, in particular to an intelligent online monitoring method and system for a high-voltage vacuum circuit breaker, electronic equipment and a computer readable storage medium.

Background

The high-voltage vacuum circuit breaker is used as important switching equipment in a power system, and is mainly used for realizing on-off and fault protection of a circuit, and the performance of the high-voltage vacuum circuit breaker is directly related to the safety and reliability of the power system. The existing high-voltage vacuum circuit breaker is generally composed of a vacuum arc-extinguishing chamber and an operating mechanism.

At present, the high-voltage vacuum circuit breaker is often monitored by manual inspection or by mounting a sensor on the surface of the high-voltage vacuum circuit breaker.

Although the manual inspection and the surface mounting of the sensor on the high-voltage vacuum circuit breaker can be completed, the manual inspection is more costly and less timely, and the surface mounting of the sensor on the high-voltage vacuum circuit breaker is susceptible to the influence of external environment during the inspection, thus the accuracy is not enough, so that an intelligent online monitoring method is needed to improve the real-time performance and accuracy of the high-voltage vacuum circuit breaker.

Disclosure of Invention

The invention provides an intelligent on-line monitoring method and a computer readable storage medium of a high-voltage vacuum circuit breaker, and mainly aims to improve the instantaneity and accuracy of the high-voltage vacuum circuit breaker.

The intelligent on-line monitoring method for the high-voltage vacuum circuit breaker comprises the steps of receiving a circuit breaker monitoring instruction, and confirming the high-voltage vacuum circuit breaker to be operated based on the circuit breaker monitoring instruction, wherein the high-voltage vacuum circuit breaker comprises a vacuum arc extinguishing chamber and an operating mechanism, and the operating mechanism comprises an electromagnetic coil, a limiting plate and a moving contact transmission rod; confirming a breaker monitoring mechanism, wherein the breaker monitoring mechanism comprises a piezoelectric sensor, an ionization sensor, a thermal conductivity sensor, a displacement sensor and an online communication device, the displacement sensor is used for monitoring the displacement of a moving contact transmission rod, the piezoelectric sensor, the ionization sensor and the thermal conductivity sensor are all arranged in a vacuum arc-extinguishing chamber, the thermal conductivity sensor comprises a resistance wire and a temperature sensor, a breaker control signal is received and sent to an operating mechanism, after the operating mechanism receives the breaker control signal, an electromagnetic coil in the operating mechanism is started, the electromagnetic coil after the operating mechanism is used for performing electromagnetic pushing operation on the moving contact transmission rod to obtain a moving transmission rod, monitoring operation is performed on the moving transmission rod based on a preset monitoring frequency and the displacement sensor, when the moving transmission rod contacts a limiting plate in the operating mechanism, the electromagnetic coil in the operating mechanism is closed to obtain a displacement time sequence, and the displacement time sequence comprises the following steps: The method comprises the steps of obtaining a displacement fluctuation index and an average displacement speed by means of speed analysis on a displacement time sequence, calculating a displacement fault rate according to the displacement fluctuation index and the average displacement speed, comparing the displacement fault rate with a preset displacement fault threshold value, performing vacuum inspection operation on a vacuum arc-extinguishing chamber by means of a piezoelectric sensor, an ionization sensor and a thermal conductivity sensor to obtain an arc-extinguishing vacuum index if the displacement fault rate is smaller than or equal to the displacement fault threshold value, sending a preset safety signal to a preset breaker monitoring platform by means of an online communication device if the arc-extinguishing vacuum index is smaller than or equal to the preset vacuum threshold value, sending a preset early warning signal to the breaker monitoring platform by means of the online communication device if the displacement fault rate is larger than the displacement fault threshold value or the arc-extinguishing vacuum index is larger than the vacuum threshold value, and completing online monitoring of the high-voltage vacuum breaker when the breaker monitoring platform receives the safety signal or the early warning signal.

Optionally, the velocity analysis of the displacement sequence to obtain the displacement fluctuation index and the average displacement velocity comprises extracting the first displacement sequence from the displacement sequenceA displacement value, wherein,Initial value of 1 based on the firstThe first displacement value is confirmed in the displacement time sequenceThe displacement value and the firstA displacement value, whereinThe shift value is associated with the first shift sequenceThe displacement values are adjacent and lag behind the firstThe displacement value of the firstThe shift value is associated with the first shift sequence+1 Displacement values are adjacent and lag behind the first+1 Displacement values, using the firstThe displacement value and the firstThe operation speed is calculated by the displacement values, and the calculation formula is as follows:

, wherein, In order to be able to operate at a speed,Is the firstThe value of the displacement is calculated from the value of the displacement,Is the firstThe value of the displacement is calculated from the value of the displacement,For a preset monitoring time interval, using the firstThe displacement value is the firstThe displacement value and the firstCalculating the running acceleration by using the displacement values, storing the running speed in a pre-built speed memory to obtain a first memory, storing the running acceleration in a pre-built acceleration memory to obtain a second memory, taking the first memory as the speed memory, taking the second memory as the acceleration memory, and making I = the speed memory+1, Let I beReturning to the extraction of the first from the displacement time sequenceA step of shifting the value until=-2, Reading out from the first memoryA running speed, read from the second memoryAnd a running acceleration, wherein,=-2 UsingIndividual running speedsAnd calculating a displacement fluctuation index and an average displacement speed by using each running acceleration.

Optionally, the calculation formula of the running acceleration is as follows:

, wherein, In order to operate the acceleration rate,Is the firstAnd a displacement value.

Optionally, the utilizingIndividual running speedsThe calculation of displacement fluctuation index and average displacement speed by individual running acceleration comprisesEach of the running accelerations performs the operations of confirming an absolute acceleration according to the running acceleration, wherein the absolute acceleration is an absolute value of the running acceleration, comparing the absolute acceleration with a preset normal acceleration, if the absolute acceleration is larger than or equal to the normal acceleration, recording the absolute acceleration as an abnormal acceleration, summarizing the abnormal acceleration to obtain a plurality of abnormal accelerations, and obtaining a plurality of abnormal accelerations according to the abnormal acceleration and the abnormal accelerationCalculating displacement fluctuation index according to each running accelerationCalculating an average displacement speed from the operation speeds, wherein the average displacement speed isAverage of the individual running speeds.

Optionally, the step of determining a plurality of abnormal acceleration sumsThe calculation of the displacement fluctuation index by the individual running accelerations includesThe absolute acceleration mean value is calculated by each running acceleration, and the calculation formula is as follows:

, wherein, As the absolute acceleration average value of the acceleration,Is thatIn the respective running accelerationThe acceleration of the operation is controlled by the control unit,Refers to taking absolute values.

Calculating a displacement fluctuation index according to a plurality of abnormal accelerations and absolute acceleration average values, wherein the calculation formula is as follows:

, wherein, In order to be an index of the displacement fluctuation,For the number of abnormal accelerations among the plurality of abnormal accelerations,Is the first of a plurality of abnormal accelerationsThe individual acceleration rates of the individual elements are,For a normal acceleration of the vehicle,As a hyperbolic tangent function.

Optionally, the calculating the displacement fault rate according to the displacement fluctuation index and the average displacement speed comprises the steps of obtaining a plurality of reference displacement data from a pre-constructed central database, wherein the reference displacement data comprise a plurality of reference speeds, a plurality of reference accelerations and storage time, executing the following operation on each reference displacement data in the plurality of reference displacement data, obtaining the reference fluctuation index and the reference average speed based on the plurality of reference speeds and the plurality of reference accelerations in the reference displacement data, and calculating the reference fault rate according to the reference fluctuation index, the reference average speed, the displacement fluctuation index and the average displacement speed, wherein the calculation formula is as follows:

, wherein, To reference the failure rate, wherein,AndThe average displacement velocity and the reference average velocity respectively,The method comprises the steps of obtaining a reference fluctuation index, summarizing the reference fault rate to obtain a plurality of reference fault rates, obtaining the current time, and calculating the displacement fault rate according to the current time, the storage time in the plurality of reference displacement data and the plurality of reference fault rates.

Optionally, the calculation formula of the displacement fault rate is as follows:

, wherein, In order to be able to displace the failure rate,For the current time period of time,Is the first of a plurality of reference failure ratesThe failure rate of the individual reference is determined,Is the first of a plurality of reference failure ratesThe storage time corresponding to the failure rate of each reference,Is a natural constant which is used for the production of the high-temperature-resistant ceramic material,Is the number of reference failure rates among the plurality of reference failure rates.

The method comprises the steps of obtaining an arc extinguishing vacuum index by performing vacuum inspection operation on a vacuum arc extinguishing chamber through a piezoelectric sensor, an ionization sensor and a thermal conductivity sensor, reading a sensing pressure value of the piezoelectric sensor in the vacuum arc extinguishing chamber, generating a plurality of hot electrons in the vacuum arc extinguishing chamber through the ionization sensor, obtaining ionic current by performing ionization operation on the residual gas in the vacuum arc extinguishing chamber through the plurality of hot electrons, obtaining a sensing current value through performing detection operation on the ionic current through the ionization sensor, performing heating operation on a resistance wire in the thermal conductivity sensor, and monitoring the surface temperature of the resistance wire in real time through a temperature sensor, obtaining a target resistance wire when the surface temperature reaches a preset test temperature, performing natural heat dissipation operation on the target resistance wire, obtaining a heat dissipation resistance wire, wherein the heat dissipation time for performing natural heat dissipation operation on the target resistance wire is preset, and calculating a sensing heat conductivity through a temperature sensor by using a test temperature, a final temperature and a heat dissipation time formula, wherein the calculation is as follows:

, wherein, In order to sense the thermal conductivity of the material,AndThe test temperature and the final temperature are respectively set,And calculating an arc extinction vacuum index by using the sensing pressure value, the sensing current value and the sensing heat conductivity.

Optionally, the calculation formula of the arc extinction vacuum index is as follows:

, wherein, For the arc extinction vacuum index,AndThe sensed pressure value and the sensed current value are respectively set.

The invention further provides an intelligent on-line monitoring system for the high-voltage vacuum circuit breaker, which comprises a monitoring mechanism confirmation module, a transmission displacement analysis module and an operation mechanism, wherein the monitoring mechanism confirmation module is used for receiving a circuit breaker monitoring instruction and confirming the high-voltage vacuum circuit breaker to be operated based on the circuit breaker monitoring instruction, the high-voltage vacuum circuit breaker comprises a vacuum arc-extinguishing chamber and the operation mechanism, the operation mechanism comprises an electromagnetic coil, a limiting plate and a moving contact transmission rod, the circuit breaker monitoring mechanism is confirmed, the circuit breaker monitoring mechanism comprises a piezoelectric sensor, an ionization sensor, a thermal conductivity sensor, a displacement sensor and an on-line communication device, the displacement sensor is used for monitoring the displacement of the moving contact transmission rod, the piezoelectric sensor, the ionization sensor and the thermal conductivity sensor are all arranged in the vacuum arc-extinguishing chamber, the thermal conductivity sensor comprises a resistance wire and a temperature sensor, the transmission displacement analysis module is used for receiving a circuit breaker control signal and sending the circuit breaker control signal to the operation mechanism, after the operation mechanism receives the circuit breaker control signal, the electromagnetic coil in the operation mechanism is started, the electromagnetic coil after the operation mechanism is started, the electromagnetic coil is utilized to push the moving contact transmission rod to perform pushing operation, the electromagnetic contact transmission rod is preset, the operation mechanism is controlled, the electromagnetic contact transmission rod is controlled, the movement is controlled by the electromagnetic coil is controlled to move, and the operation mechanism is controlled to move, and the motion sensor is controlled by the motion sensor to move, and the transmission rod is controlled, and the time-limitation is controlled by the motion sensor to move.The device comprises a displacement value, a displacement time sequence, an arc extinction vacuum inspection module, a monitoring platform communication module, a pre-constructed safety signal and an on-line communication device, wherein the displacement time sequence is subjected to velocity analysis to obtain a displacement fluctuation index and an average displacement velocity, a displacement fault rate is calculated according to the displacement fluctuation index and the average displacement velocity, the displacement fault rate is compared with a preset displacement fault threshold, the arc extinction vacuum inspection module is used for performing vacuum inspection operation on a vacuum arc extinguishing chamber by using a piezoelectric sensor, an ionization sensor and a thermal conductivity sensor to obtain an arc extinction vacuum index if the displacement fault rate is smaller than or equal to the displacement fault threshold, the monitoring platform communication module is used for sending the pre-constructed safety signal to a pre-constructed breaker monitoring platform by using the on-line communication device if the arc extinction vacuum index is smaller than or equal to the preset vacuum threshold, and sending the pre-constructed early warning signal to the breaker monitoring platform by using the on-line communication device if the displacement fault rate is larger than the displacement fault threshold or the arc extinction vacuum index is larger than the vacuum threshold, and completing on-line monitoring of the high-voltage vacuum breaker when the breaker monitoring platform receives the safety signal or the early warning signal.

In order to solve the problems, the invention also provides electronic equipment which comprises a memory and a processor, wherein the memory stores at least one instruction, and the processor executes the instruction stored in the memory to realize the intelligent on-line monitoring method of the high-voltage vacuum circuit breaker.

In order to solve the above problems, the present invention further provides a computer readable storage medium having at least one instruction stored therein, the at least one instruction being executed by a processor in an electronic device to implement the above-described intelligent on-line monitoring method of a high voltage vacuum circuit breaker.

The invention aims to solve the problems in the background art, and the invention confirms a high-voltage vacuum circuit breaker to be operated based on a circuit breaker monitoring instruction by receiving the circuit breaker monitoring instruction, wherein the high-voltage vacuum circuit breaker comprises: the embodiment of the invention can be used for constructing a complete monitoring system by confirming the breaker monitoring mechanism, installing the piezoelectric sensor, the ionization sensor and the thermal conductivity sensor in the vacuum arc-extinguishing chamber, thereby improving the accuracy of monitoring the high-voltage vacuum breaker, receiving a breaker control signal, transmitting the breaker control signal to the operating mechanism, starting the operating mechanism after receiving the breaker control signal, pushing the moving coil in the operating mechanism to monitor the displacement of the moving contact transmission rod, and closing the moving contact transmission rod by utilizing the moving coil in the operating mechanism when the moving mechanism is started, wherein the moving mechanism is started by utilizing the moving coil, and the moving contact transmission rod is controlled by utilizing the moving mechanism to perform the movement of the moving contact transmission rod when the moving mechanism is started, the displacement sequence includes: The displacement values, the displacement sensor monitors the displacement of the motion transmission rod, accurately measures the displacement time sequence of the motion transmission rod, is convenient for analyzing the motion state of the motion transmission rod according to the displacement time sequence, and analyzes the velocity of the displacement time sequence to obtain the displacement fluctuation index and the average displacement velocity, the displacement fluctuation index and the average displacement velocity of the motion transmission rod during motion are accurately calculated by analyzing the velocity of the displacement time sequence, the accuracy of monitoring the high-voltage vacuum circuit breaker is improved, the displacement fault rate is calculated according to the displacement fluctuation index and the average displacement velocity, the displacement fault rate is compared with the preset displacement fault threshold, if the displacement fault rate is smaller than or equal to the displacement fault threshold, the vacuum inspection operation is carried out on the vacuum arc extinguishing chamber by using the piezoelectric sensor, the ionization sensor and the thermal conductivity sensor, obtaining arc extinction vacuum index, it can be seen that the embodiment of the invention comprehensively detects the vacuum arc extinction chamber through the piezoelectric sensor, the ionization sensor and the thermal conductivity sensor, calculates the arc extinction vacuum index, accurately quantifies the vacuum degree of the vacuum arc extinction chamber, improves the accuracy of monitoring the high-voltage vacuum circuit breaker, utilizes the online communication device to send the pre-built safety signal to the pre-built circuit breaker monitoring platform if the arc extinction vacuum index is smaller than or equal to the preset vacuum threshold value, utilizes the online communication device to send the pre-built early warning signal to the circuit breaker monitoring platform if the displacement failure rate is larger than the displacement failure threshold value or the arc extinction vacuum index is larger than the vacuum threshold value, completes the online monitoring of the high-voltage vacuum circuit breaker when the circuit breaker monitoring platform receives the safety signal or the early warning signal, therefore, the embodiment of the invention feeds the monitoring result back to the circuit breaker monitoring platform in real time through the online communication device, so that the real-time performance of monitoring the high-voltage vacuum circuit breaker is improved. Therefore, the invention can improve the real-time performance and accuracy of the high-voltage vacuum circuit breaker.

Drawings

Fig. 1 is a flow chart of an intelligent on-line monitoring method of a high-voltage vacuum circuit breaker according to an embodiment of the invention, fig. 2 is a functional block diagram of an intelligent on-line monitoring system of a high-voltage vacuum circuit breaker according to an embodiment of the invention, and fig. 3 is a structural diagram of an electronic device for implementing the intelligent on-line monitoring method of a high-voltage vacuum circuit breaker according to an embodiment of the invention.

Reference numerals illustrate 1, electronic device, 10, processor, 11, memory, 12, bus.

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

The embodiment of the application provides an intelligent on-line monitoring method of a high-voltage vacuum circuit breaker. The execution main body of the intelligent on-line monitoring method of the high-voltage vacuum circuit breaker comprises, but is not limited to, at least one of a server, a terminal and the like which can be configured to execute the electronic equipment of the method provided by the embodiment of the application. In other words, the intelligent on-line monitoring method of the high-voltage vacuum circuit breaker can be executed by software or hardware installed in a terminal device or a server device, wherein the software can be a blockchain platform. The server side comprises, but is not limited to, a single server, a server cluster, a cloud server or a cloud server cluster and the like.

Referring to fig. 1, a flow chart of an intelligent on-line monitoring method of a high-voltage vacuum circuit breaker according to an embodiment of the invention is shown. In the embodiment, the intelligent on-line monitoring method of the high-voltage vacuum circuit breaker comprises the steps of S1, receiving a circuit breaker monitoring instruction, and confirming the high-voltage vacuum circuit breaker to be operated based on the circuit breaker monitoring instruction, wherein the high-voltage vacuum circuit breaker comprises a vacuum arc-extinguishing chamber and an operating mechanism, and the operating mechanism comprises an electromagnetic coil, a limiting plate and a moving contact transmission rod.

It should be explained that the breaker monitoring instruction is generally initiated by a monitor of the high voltage vacuum breaker. The small sheet is a monitor of a certain breaker monitoring center, on-line monitoring is needed to be carried out on a certain high-voltage vacuum breaker to be operated, so that the breaker monitoring instruction is initiated, and each high-voltage vacuum breaker has a corresponding number or code in a breaker monitoring platform of the breaker monitoring center, so that the number or code of the high-voltage vacuum breaker can be designated when the breaker monitoring instruction is initiated, the breaker monitoring instruction only aiming at a certain specific high-voltage vacuum breaker is sent, and the breaker monitoring center can confirm the corresponding high-voltage vacuum breaker according to the number or code of the high-voltage vacuum breaker corresponding to the breaker monitoring instruction. The breaker monitoring center is a department in the power substation for monitoring the high-voltage vacuum breaker.

It can be understood that the high-voltage vacuum circuit breaker is a vacuum circuit breaker used in a high-voltage power system, and comprises a vacuum arc-extinguishing chamber and an operating mechanism, wherein the vacuum arc-extinguishing chamber is a core component of the high-voltage vacuum circuit breaker, and the formation and development of an electric arc during breaking current can be restrained by utilizing the insulativity of the high-vacuum environment in the vacuum arc-extinguishing chamber, so that the safe breaking of a circuit is realized. The operating mechanism is a mechanical device for driving contacts of the high-voltage vacuum circuit breaker to complete switching-on and switching-off operations, and comprises an electromagnetic coil, a limiting plate and a moving contact transmission rod, wherein the electromagnetic coil is a device for generating electromagnetic force in the operating mechanism and mainly aims to provide enough driving force to realize switching-off or switching-on actions of the high-voltage vacuum circuit breaker. The limiting plate is a baffle plate with a pressure sensor, and when the moving contact transmission rod contacts the limiting plate, the limiting plate can send a signal to prompt the electromagnetic coil moving contact transmission rod to move in place, so that the moving contact transmission rod stops moving. The moving contact transmission rod is a mechanical rod connected with a moving contact of the high-voltage vacuum circuit breaker and is used for transmitting the driving force of the electromagnetic coil so that the moving contact can complete the switching-off action or the switching-on action. The movable contact is a movable contact in the high-voltage vacuum circuit breaker, and is contacted with the fixed contact to form a conductive loop when the movable contact is closed, and separated from the fixed contact to cut off a circuit when the movable contact is opened.

S2, confirming a circuit breaker monitoring mechanism, wherein the circuit breaker monitoring mechanism comprises a piezoelectric sensor, an ionization sensor, a thermal conductivity sensor, a displacement sensor and an online communication device, the displacement sensor is used for monitoring the displacement of a moving contact transmission rod, and the piezoelectric sensor, the ionization sensor and the thermal conductivity sensor are all arranged in a vacuum arc extinguishing chamber, and the thermal conductivity sensor comprises a resistance wire and a temperature sensor.

It should be explained that the circuit breaker monitoring mechanism is a device for monitoring the operation state of the high-voltage vacuum circuit breaker, and the piezoelectric sensor, the ionization sensor, the thermal conductivity sensor and the displacement sensor in the circuit breaker monitoring mechanism are all installed in the high-voltage vacuum circuit breaker in advance before the high-voltage vacuum circuit breaker is formally put into use.

It is understood that a piezoelectric sensor is a sensor that senses changes in ambient air pressure through deformation of a piezoelectric material, thereby outputting a corresponding electrical signal. The main function of the ionization sensor is that a plurality of hot electrons are emitted by a hot cathode of the ionization sensor to ionize molecules of residual gas in the vacuum arc extinguishing chamber, and positive ions generated after the ionization of the residual gas are captured by an electric field generated by an ion collector of the ionization sensor, so that a measurable ion current is formed, and the number of the molecules in the residual gas is reflected. The thermal conductivity sensor is a device capable of measuring the thermal conductivity of the residual gas in the vacuum arc-extinguishing chamber, and can reflect the vacuum degree of the vacuum arc-extinguishing chamber through the thermal conductivity of the residual gas because the heat transfer capacity of the residual gas to heat changes along with the density change of the residual gas, and comprises a resistance wire and a temperature sensor. The displacement sensor is a sensor capable of monitoring the displacement of the movable contact transmission rod. The on-line communication device is mainly used for feeding back the monitoring result of the high-voltage vacuum circuit breaker to the circuit breaker monitoring platform in real time.

And S3, receiving a breaker control signal, sending the breaker control signal to an operating mechanism, starting an electromagnetic coil in the operating mechanism after the operating mechanism receives the breaker control signal, and performing electromagnetic pushing operation on a moving contact transmission rod by using the started electromagnetic coil to obtain a motion transmission rod.

It should be explained that the breaker control signal is initiated by a controller of the high voltage vacuum breaker. The electromagnetic pushing operation of the electromagnetic coil after starting on the moving contact transmission rod means that the electromagnetic force generated by the electromagnetic coil is utilized to push the moving contact transmission rod.

The small king is an example of a controller of a high-voltage vacuum circuit breaker, and the high-voltage vacuum circuit breaker is required to break the power transmission of a certain section of power line, so that the circuit breaker control signal is initiated, when an operating mechanism of the high-voltage vacuum circuit breaker receives the circuit breaker control signal, an electromagnetic coil in the operating mechanism is started, electromagnetic force is generated by the electromagnetic coil to push a moving contact transmission rod, and then the moving contact transmission rod drives a moving contact on the high-voltage vacuum circuit breaker, so that the moving contact is separated from a fixed contact, and the circuit is broken. The motion transmission rod refers to a moving contact transmission rod in the motion process.

S4, monitoring operation is carried out on the motion transmission rod based on preset monitoring frequency and a displacement sensor, when the motion transmission rod contacts a limiting plate in the operating mechanism, an electromagnetic coil in the operating mechanism is closed, and a displacement time sequence is obtained, wherein the displacement time sequence comprises: and a displacement value.

The monitoring frequency is 1kHz (once every millisecond detection), that is, the displacement sensor detects the motion transmission rod once every millisecond, and the displacement sensor outputs the distance between the current position and the initial position of the motion transmission rod during each detection, the distance is the displacement value, until the motion transmission rod contacts the limiting plate in the operating mechanism, the electromagnetic coil in the operating mechanism is closed, the motion of the motion transmission rod is stopped, all the displacement values output by the displacement sensor during the motion process of the motion transmission rod are counted, the displacement time sequence is obtained,Refers to the number of displacement values in the displacement time sequence, wherein the displacement time sequence comprisesA sequence of displacement values, anThe displacement values are ordered in the displacement timing sequence in a time from first to last order when the displacement values are output.

S5, carrying out speed analysis on the displacement time sequence to obtain a displacement fluctuation index and an average displacement speed.

In detail, the speed analysis of the displacement time sequence to obtain the displacement fluctuation index and the average displacement speed comprises extracting the first displacement time sequenceA displacement value, wherein,Initial value of 1 based on the firstThe first displacement value is confirmed in the displacement time sequenceThe displacement value and the firstA displacement value, whereinThe shift value is associated with the first shift sequenceThe displacement values are adjacent and lag behind the firstThe displacement value of the firstThe shift value is associated with the first shift sequence+1 Displacement values are adjacent and lag behind the first+1 Displacement values, using the firstThe displacement value and the firstThe operation speed is calculated by the displacement values, and the calculation formula is as follows:

In detail, the calculation formula of the running acceleration is as follows:

It will be appreciated that the operating speed reflects the movement of the transmission rod from the firstThe displacement value moves to the firstAverage speed at each displacement value. The running acceleration reflects the motion transmission rod from the firstThe displacement value moves to the firstAcceleration at each displacement value. The speed memory is a memory for storing the running speed. The acceleration memory is a memory for storing the running acceleration.

The first displacement value is extracted from the displacement time sequence as the 1 st displacement value, the displacement value adjacent to the 1 st displacement value and lagging behind the 1 st displacement value in the displacement time sequence is taken as the 2 nd displacement value, the displacement value adjacent to the 2 nd displacement value and lagging behind the 2 nd displacement value in the displacement time sequence is taken as the 3 rd displacement value, the 1 st displacement value, the 2 nd displacement value and the 3 rd displacement value are utilized to calculate the running speed and the running acceleration, the running speed is stored in a speed memory, the running acceleration is stored in an acceleration memory, and the third displacement value is extracted from the displacement time sequenceAnd extracting a second ordered displacement value from the displacement time sequence to serve as a2 nd displacement value, sequentially confirming a 3 rd displacement value and a 4 th displacement value, calculating new running speed and running acceleration by utilizing the 2 nd displacement value, the 3 rd displacement value and the 4 th displacement value, respectively storing the running speed and the running acceleration in a speed memory and an acceleration memory, and the like, and if 100 displacement values exist in the displacement time sequence, namely, until the 98 th displacement value is extracted from the displacement time sequence, calculating the 98 th running speed and the 98 th running acceleration and respectively storing the 98 th displacement value in the speed memory and the acceleration memory, and ending the cycle after obtaining a first memory and a second memory, wherein 98 running speeds are stored in the first memory and 98 running accelerations are stored in the second memory.

In detail, the utilizationIndividual running speedsThe calculation of displacement fluctuation index and average displacement speed by individual running acceleration comprisesEach of the running accelerations performs the operations of confirming an absolute acceleration according to the running acceleration, wherein the absolute acceleration is an absolute value of the running acceleration, comparing the absolute acceleration with a preset normal acceleration, if the absolute acceleration is larger than or equal to the normal acceleration, recording the absolute acceleration as an abnormal acceleration, summarizing the abnormal acceleration to obtain a plurality of abnormal accelerations, and obtaining a plurality of abnormal accelerations according to the abnormal acceleration and the abnormal accelerationCalculating displacement fluctuation index according to each running accelerationCalculating an average displacement speed from the operation speeds, wherein the average displacement speed isAverage of the individual running speeds.

For example, the maximum value of the absolute value of the acceleration that can be reached by the high-voltage vacuum circuit breaker, which has just been produced, in normal operation, by moving the transmission rod is determined in advance as the normal acceleration.

It should be understood that the moving contact transmission rod in the high-voltage vacuum circuit breaker can be aged or worn after long-time use, so that the acceleration in the running process of the moving contact transmission rod can be abnormal due to aging or wear.

In detail, the method is based on a plurality of abnormal accelerations andThe calculation of the displacement fluctuation index by the individual running accelerations includesThe absolute acceleration mean value is calculated by each running acceleration, and the calculation formula is as follows:

It should be understood that the displacement fluctuation index reflects the safety degree of the running condition of the moving contact transmission rod in the high-voltage vacuum circuit breaker during running, and the greater the displacement fluctuation index is, the lower the safety degree of the running condition of the moving contact transmission rod in the high-voltage vacuum circuit breaker during running is.

S6, calculating a displacement fault rate according to the displacement fluctuation index and the average displacement speed, and comparing the displacement fault rate with a preset displacement fault threshold.

Preferably, the displacement failure threshold is set to 10%.

The method comprises the steps of obtaining a plurality of reference displacement data from a pre-built central database, wherein the reference displacement data comprise a plurality of reference speeds, a plurality of reference accelerations and storage time, executing the following operation on each reference displacement data in the plurality of reference displacement data, obtaining a reference fluctuation index and a reference average speed based on the plurality of reference speeds and the plurality of reference accelerations in the reference displacement data, and calculating the reference fault rate according to the reference fluctuation index, the reference average speed, the displacement fluctuation index and the average displacement speed, wherein the calculation formula is as follows:

It should be explained that the central database is a database storing a plurality of reference displacement data.

The circuit breaker monitoring center is provided with a central database in advance, and the central database is used for storing a plurality of running speeds and a plurality of running accelerations generated in the running process of the movable contact connecting rod of other high-voltage vacuum circuit breakers, so that data reference is provided for the currently monitored high-voltage vacuum circuit breakers. The moving contact connecting rod of other high-voltage vacuum circuit breakers generates a plurality of running speeds in the running process, namely a plurality of reference speeds, and the moving contact connecting rod of other high-voltage vacuum circuit breakers generates a plurality of running accelerations in the running process, namely a plurality of reference accelerations, and the central database stores the plurality of running speeds and the time of the plurality of running accelerations generated in the running process of the moving contact connecting rod of other high-voltage vacuum circuit breakers as the storage time. The storage time, the plurality of reference speeds and the plurality of reference accelerations jointly form reference displacement data.

It can be understood that the method for obtaining the reference fluctuation index and the reference average speed based on the plurality of reference speeds and the plurality of reference accelerations in the reference displacement data is the same as the method for obtaining the displacement fluctuation index and the average displacement speed by using the plurality of running speeds and the plurality of running accelerations, and will not be described herein. The reference failure rate reflects the probability of mechanical failure of the moving contact transmission rod in the high-voltage vacuum circuit breaker when one of the plurality of reference displacement data is referred to, and the greater the reference failure rate is, the greater the probability of mechanical failure of the moving contact transmission rod in the high-voltage vacuum circuit breaker is.

It should be understood that, the current time refers to a time when a plurality of reference fault rates are obtained, and the shorter the interval between the storage time and the current time, the closer the reference displacement data is to the current environment condition, the higher the value of the reference, so that the smaller the difference between the storage time corresponding to the reference fault rate and the current time when the displacement fault rate is calculated, the larger the weight of the reference fault rate.

In detail, the calculation formula of the displacement failure rate is as follows:

It should be appreciated that the displacement failure rate reflects the probability of mechanical failure of the moving contact transmission rod in the high-voltage vacuum circuit breaker, and the greater the displacement failure rate, the greater the probability of mechanical failure of the moving contact transmission rod in the high-voltage vacuum circuit breaker.

And S7, if the displacement fault rate is smaller than or equal to the displacement fault threshold value, performing vacuum inspection operation on the vacuum arc extinguishing chamber by using the piezoelectric sensor, the ionization sensor and the thermal conductivity sensor to obtain an arc extinguishing vacuum index.

The method comprises the steps of utilizing a piezoelectric sensor, an ionization sensor and a thermal conductivity sensor to perform vacuum inspection operation on a vacuum arc-extinguishing chamber to obtain an arc-extinguishing vacuum index, reading a sensing pressure value of the piezoelectric sensor in the vacuum arc-extinguishing chamber, utilizing the ionization sensor to generate a plurality of hot electrons in the vacuum arc-extinguishing chamber, wherein the vacuum arc-extinguishing chamber comprises residual gas, utilizing the plurality of hot electrons to perform ionization operation on the residual gas in the vacuum arc-extinguishing chamber to obtain ion current, utilizing the ionization sensor to perform detection operation on the ion current to obtain a sensing current value, performing heating operation on a resistance wire in the thermal conductivity sensor, utilizing a temperature sensor to monitor the surface temperature of the resistance wire in real time, obtaining a target resistance wire when the surface temperature reaches a preset test temperature, performing natural heat dissipation operation on the target resistance wire to obtain a heat dissipation resistance wire, wherein the heat dissipation time for performing natural heat dissipation operation on the target resistance wire is preset, utilizing the temperature sensor to read the final temperature of the heat dissipation resistance wire, and utilizing the test temperature, the final temperature and the heat dissipation time to calculate the sensing heat conductivity, wherein a calculation formula is as follows:

In detail, the calculation formula of the arc extinction vacuum index is as follows:

It should be explained that the sensed pressure value is the value of the air pressure in the vacuum interrupter measured by the piezoelectric sensor. Because the vacuum arc-extinguishing chamber cannot realize absolute vacuum in practical application, but keeps a high-vacuum state, trace gas still remains in the vacuum arc-extinguishing chamber in practice, and the trace gas remained is the residual gas. The natural heat dissipation operation is performed on the target resistance wire, namely, the target resistance wire dissipates heat in the vacuum arc-extinguishing chamber.

The ionization sensor emits hot electrons through an internal hot cathode, the hot electrons collide with gas molecules of residual gas to cause ionization of the gas molecules to generate positive ions and free electrons, the generated positive ions are led to an ion collector with negative electricity in the ionization sensor under the action of an electric field, the ion collector can form a measurable ion current when capturing the positive ions, the current of the ion current is a sensing current value, the ion current is generated by the gas molecules of the residual gas, and therefore the sensing current value reflects the number of the gas molecules of the residual gas in the vacuum arc extinguishing chamber, and the larger the sensing current value is, the more the number of the gas molecules of the residual gas in the vacuum arc extinguishing chamber is.

It will be appreciated that the test temperature is related to the type of resistance wire and is set by the monitor.

For example, when the resistance wire is heated to the test temperature of 50 ℃, the heating is stopped, if the heat dissipation time is 3 minutes, the target resistance wire is enabled to dissipate heat for 3 minutes in the environment of the vacuum arc-extinguishing chamber, the heat dissipation resistance wire is obtained, and the temperature of the heat dissipation resistance wire is read by using the temperature sensor, so that the final temperature is obtained.

It should be appreciated that since the ability of the residual gas in the vacuum interrupter to transfer heat varies with the density of the residual gas, the sensed thermal conductivity reflects the density of the residual gas in the vacuum interrupter, the greater the sensed thermal conductivity, the greater the density of the residual gas in the vacuum interrupter.

It can be understood that, because the sensing pressure value is the value of the air pressure in the vacuum arc-extinguishing chamber measured by the piezoelectric sensor, the sensing current value reflects the gas molecular quantity of the residual gas in the vacuum arc-extinguishing chamber, and the sensing heat conductivity reflects the density of the residual gas in the vacuum arc-extinguishing chamber, the vacuum degree of the vacuum arc-extinguishing chamber is comprehensively reflected by combining the sensing pressure value, the sensing current value and the sensing heat conductivity, and the larger the vacuum degree of the vacuum arc-extinguishing chamber is, the higher the vacuum degree of the vacuum arc-extinguishing chamber is.

And S8, if the arc extinction vacuum index is smaller than or equal to a preset vacuum threshold value, the on-line communication device is utilized to send a pre-built safety signal to a pre-built circuit breaker monitoring platform, and if the displacement fault rate is larger than the displacement fault threshold value or the arc extinction vacuum index is larger than the vacuum threshold value, the on-line communication device is utilized to send a pre-built early warning signal to the circuit breaker monitoring platform.

For example, the arc extinction vacuum index of the vacuum interrupter in the high-voltage vacuum circuit breaker that has just been produced may be determined in advance as a vacuum threshold value, and the vacuum threshold value is set by a monitor.

It should be understood that the safety signal and the early warning signal are data packets containing a section of safety text information and early warning text information, for example, the safety text information is "the high voltage vacuum circuit breaker operates normally |", and the early warning text information is "the high voltage vacuum circuit breaker operates possibly to have a fault |".

And S9, when the circuit breaker monitoring platform receives the safety signal or the early warning signal, the on-line monitoring of the high-voltage vacuum circuit breaker is completed.

It should be explained that the circuit breaker monitoring platform is a software pre-programmed by python or c++, which can parse out the safety text information or the early warning text information contained in the safety signal or the early warning signal and display the safety text information or the early warning text information on the computer page of the circuit breaker monitoring center.

Fig. 2 is a functional block diagram of an intelligent on-line monitoring system for a high-voltage vacuum circuit breaker according to an embodiment of the present invention.

The intelligent on-line monitoring system 100 of the high-voltage vacuum circuit breaker can be installed in electronic equipment. According to the implemented functions, the intelligent on-line monitoring system 100 of the high-voltage vacuum circuit breaker may include a monitoring mechanism confirmation module 101, a transmission displacement analysis module 102, an arc extinguishing vacuum inspection module 103, and a monitoring platform communication module 104. The module of the invention, which may also be referred to as a unit, refers to a series of computer program segments, which are stored in the memory of the electronic device, capable of being executed by the processor of the electronic device and of performing a fixed function.

The monitoring mechanism confirmation module 101 is configured to receive a breaker monitoring instruction, and confirm a high-voltage vacuum breaker to be operated based on the breaker monitoring instruction, where the high-voltage vacuum breaker includes a vacuum arc-extinguishing chamber and an operating mechanism, the operating mechanism includes an electromagnetic coil, a limiting plate, and a moving contact transmission rod, and confirms the breaker monitoring mechanism, where the breaker monitoring mechanism includes a piezoelectric sensor, an ionization sensor, a thermal conductivity sensor, a displacement sensor, and an online communication device, and the displacement sensor is configured to monitor displacement of the moving contact transmission rod, and the piezoelectric sensor, the ionization sensor, and the thermal conductivity sensor are all installed in the vacuum arc-extinguishing chamber, and the thermal conductivity sensor includes a resistance wire and a temperature sensor; the transmission displacement analysis module 102 is configured to receive a breaker control signal, send the breaker control signal to an operating mechanism, start an electromagnetic coil in the operating mechanism after the operating mechanism receives the breaker control signal, perform electromagnetic pushing operation on a moving contact transmission rod by using the started electromagnetic coil, obtain a motion transmission rod, perform monitoring operation on the motion transmission rod based on a preset monitoring frequency and a displacement sensor, and close the electromagnetic coil in the operating mechanism when the motion transmission rod contacts a limiting plate in the operating mechanism, so as to obtain a displacement time sequence, where the displacement time sequence includes: The device comprises a displacement value, a displacement time sequence, an arc extinction vacuum inspection module 103, a monitoring platform communication module 104 and an on-line communication device, wherein the displacement time sequence is subjected to velocity analysis to obtain a displacement fluctuation index and an average displacement velocity, a displacement fault rate is calculated according to the displacement fluctuation index and the average displacement velocity, the displacement fault rate is compared with a preset displacement fault threshold, the arc extinction vacuum inspection module 103 is used for performing vacuum inspection operation on a vacuum arc-extinguishing chamber by using a piezoelectric sensor, an ionization sensor and a thermal conductivity sensor to obtain an arc extinction vacuum index if the displacement fault rate is smaller than or equal to the displacement fault threshold, the monitoring platform communication module 104 is used for sending a pre-built safety signal to a pre-built breaker monitoring platform by using the on-line communication device if the arc extinction vacuum index is smaller than or equal to the preset vacuum threshold, and sending a pre-built early warning signal to the breaker monitoring platform by using the on-line communication device if the displacement fault rate is larger than the displacement fault threshold or the arc extinction vacuum index is larger than the vacuum threshold, and completing on-line monitoring of the high-voltage vacuum breaker when the breaker monitoring platform receives the safety signal or the early warning signal.

In detail, the modules in the intelligent online monitoring system 100 for high-voltage vacuum circuit breaker in the embodiment of the present invention use the same technical means as the intelligent online monitoring method for high-voltage vacuum circuit breaker described in fig. 1, and can produce the same technical effects, which are not described herein.

Fig. 3 is a schematic structural diagram of an electronic device for implementing an intelligent on-line monitoring method of a high-voltage vacuum circuit breaker according to an embodiment of the present invention.

The electronic device 1 may comprise a processor 10, a memory 11 and a bus 12, and may further comprise a computer program stored in the memory 11 and executable on the processor 10, such as an intelligent on-line monitoring method program of a high voltage vacuum circuit breaker.

The memory 11 includes at least one type of readable storage medium, including flash memory, a mobile hard disk, a multimedia card, a card memory (e.g., SD or DX memory, etc.), a magnetic memory, a magnetic disk, an optical disk, etc. The memory 11 may in some embodiments be an internal storage unit of the electronic device 1, such as a removable hard disk of the electronic device 1. The memory 11 may in other embodiments also be an external storage device of the electronic device 1, such as a plug-in mobile hard disk, a smart memory card (SMART MEDIA CARD, SMC), a Secure Digital (SD) card, a flash memory card (FLASH CARD) or the like, which are provided on the electronic device 1. Further, the memory 11 further comprises an internal storage unit of the electronic device 1, and also comprises an external storage device. The memory 11 may be used not only for storing application software installed in the electronic device 1 and various data, such as codes of an intelligent on-line monitoring method program of a high voltage vacuum circuit breaker, etc., but also for temporarily storing data that has been output or is to be output.

The processor 10 may be comprised of integrated circuits in some embodiments, for example, a single packaged integrated circuit, or may be comprised of multiple integrated circuits packaged with the same or different functions, including one or more central processing units (Central Processing unit, CPU), microprocessors, digital processing chips, graphics processors, combinations of various control chips, and the like. The processor 10 is a Control Unit (Control Unit) of the electronic device, connects respective parts of the entire electronic device using various interfaces and lines, executes or executes programs or modules (e.g., intelligent on-line monitoring method program of a high voltage vacuum circuit breaker, etc.) stored in the memory 11, and invokes data stored in the memory 11 to perform various functions of the electronic device 1 and process the data.

The bus 12 may be a peripheral component interconnect standard (PERIPHERAL COMPONENT INTERCONNECT, PCI) bus, or an extended industry standard architecture (extended industry standard architecture, EISA) bus, among others. The bus 12 may be divided into an address bus, a data bus, a control bus, etc. The bus 12 is arranged to enable a connection communication between the memory 11 and at least one processor 10 etc.

Fig. 3 shows only an electronic device with components, it being understood by a person skilled in the art that the structure shown in fig. 3 does not constitute a limitation of the electronic device 1, and may comprise fewer or more components than shown, or may combine certain components, or may be arranged in different components.

For example, although not shown, the electronic device 1 may further include a power source (such as a battery) for supplying power to each component, and preferably, the power source may be logically connected to the at least one processor 10 through a power management device, so that functions of charge management, discharge management, power consumption management, and the like are implemented through the power management device. The power supply may also include one or more of any of a direct current or alternating current power supply, recharging device, power failure detection circuit, power converter or inverter, power status indicator, etc. The electronic device 1 may further include various sensors, bluetooth modules, wi-Fi modules, etc., which will not be described herein.

Further, the electronic device 1 may also comprise a network interface, optionally the network interface may comprise a wired interface and/or a wireless interface (e.g. WI-FI interface, bluetooth interface, etc.), typically used for establishing a communication connection between the electronic device 1 and other electronic devices.

The electronic device 1 may optionally further comprise a user interface, which may be a Display, an input unit, such as a Keyboard (Keyboard), or a standard wired interface, a wireless interface. Alternatively, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch, or the like. The display may also be referred to as a display screen or display unit, as appropriate, for displaying information processed in the electronic device 1 and for displaying a visual user interface.

The intelligent on-line monitoring method program of the high-voltage vacuum circuit breaker stored in the memory 11 in the electronic equipment 1 is a combination of a plurality of instructions, and can be realized when the processor 10 runs, by receiving a circuit breaker monitoring instruction and confirming the high-voltage vacuum circuit breaker to be operated based on the circuit breaker monitoring instruction, wherein the high-voltage vacuum circuit breaker comprises a vacuum arc extinguishing chamber and an operating mechanism, and the operating mechanism comprises an electromagnetic coil, a limiting plate and a moving contact transmission rod; confirming a breaker monitoring mechanism, wherein the breaker monitoring mechanism comprises a piezoelectric sensor, an ionization sensor, a thermal conductivity sensor, a displacement sensor and an online communication device, the displacement sensor is used for monitoring the displacement of a moving contact transmission rod, the piezoelectric sensor, the ionization sensor and the thermal conductivity sensor are all arranged in a vacuum arc-extinguishing chamber, the thermal conductivity sensor comprises a resistance wire and a temperature sensor, a breaker control signal is received and sent to an operating mechanism, after the operating mechanism receives the breaker control signal, an electromagnetic coil in the operating mechanism is started, the electromagnetic coil after the operating mechanism is used for performing electromagnetic pushing operation on the moving contact transmission rod to obtain a moving transmission rod, monitoring operation is performed on the moving transmission rod based on a preset monitoring frequency and the displacement sensor, when the moving transmission rod contacts a limiting plate in the operating mechanism, the electromagnetic coil in the operating mechanism is closed to obtain a displacement time sequence, and the displacement time sequence comprises the following steps: The method comprises the steps of obtaining a displacement fluctuation index and an average displacement speed by means of speed analysis on a displacement time sequence, calculating a displacement fault rate according to the displacement fluctuation index and the average displacement speed, comparing the displacement fault rate with a preset displacement fault threshold value, performing vacuum inspection operation on a vacuum arc-extinguishing chamber by means of a piezoelectric sensor, an ionization sensor and a thermal conductivity sensor to obtain an arc-extinguishing vacuum index if the displacement fault rate is smaller than or equal to the displacement fault threshold value, sending a preset safety signal to a preset breaker monitoring platform by means of an online communication device if the arc-extinguishing vacuum index is smaller than or equal to the preset vacuum threshold value, sending a preset early warning signal to the breaker monitoring platform by means of the online communication device if the displacement fault rate is larger than the displacement fault threshold value or the arc-extinguishing vacuum index is larger than the vacuum threshold value, and completing online monitoring of the high-voltage vacuum breaker when the breaker monitoring platform receives the safety signal or the early warning signal.

Specifically, the specific implementation method of the above instructions by the processor 10 may refer to descriptions of related steps in the corresponding embodiments of fig. 1 to 3, which are not repeated herein.

Further, the modules/units integrated in the electronic device 1 may be stored in a computer readable storage medium if implemented in the form of software functional units and sold or used as separate products. The computer readable storage medium may be volatile or nonvolatile. For example, the computer readable medium may include any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM).

The invention also provides a computer readable storage medium storing a computer program which, when executed by a processor of an electronic device, can realize that a high-voltage vacuum circuit breaker to be operated is confirmed based on a circuit breaker monitoring instruction, wherein the high-voltage vacuum circuit breaker comprises a vacuum arc extinguishing chamber and an operating mechanism, and the operating mechanism comprises an electromagnetic coil, a limiting plate and a moving contact transmission rod; confirming a breaker monitoring mechanism, wherein the breaker monitoring mechanism comprises a piezoelectric sensor, an ionization sensor, a thermal conductivity sensor, a displacement sensor and an online communication device, the displacement sensor is used for monitoring the displacement of a moving contact transmission rod, the piezoelectric sensor, the ionization sensor and the thermal conductivity sensor are all arranged in a vacuum arc-extinguishing chamber, the thermal conductivity sensor comprises a resistance wire and a temperature sensor, a breaker control signal is received and sent to an operating mechanism, after the operating mechanism receives the breaker control signal, an electromagnetic coil in the operating mechanism is started, the electromagnetic coil after the operating mechanism is used for performing electromagnetic pushing operation on the moving contact transmission rod to obtain a moving transmission rod, monitoring operation is performed on the moving transmission rod based on a preset monitoring frequency and the displacement sensor, when the moving transmission rod contacts a limiting plate in the operating mechanism, the electromagnetic coil in the operating mechanism is closed to obtain a displacement time sequence, and the displacement time sequence comprises the following steps: The method comprises the steps of obtaining a displacement fluctuation index and an average displacement speed by means of speed analysis on a displacement time sequence, calculating a displacement fault rate according to the displacement fluctuation index and the average displacement speed, comparing the displacement fault rate with a preset displacement fault threshold value, performing vacuum inspection operation on a vacuum arc-extinguishing chamber by means of a piezoelectric sensor, an ionization sensor and a thermal conductivity sensor to obtain an arc-extinguishing vacuum index if the displacement fault rate is smaller than or equal to the displacement fault threshold value, sending a preset safety signal to a preset breaker monitoring platform by means of an online communication device if the arc-extinguishing vacuum index is smaller than or equal to the preset vacuum threshold value, sending a preset early warning signal to the breaker monitoring platform by means of the online communication device if the displacement fault rate is larger than the displacement fault threshold value or the arc-extinguishing vacuum index is larger than the vacuum threshold value, and completing online monitoring of the high-voltage vacuum breaker when the breaker monitoring platform receives the safety signal or the early warning signal.

In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus, system and method may be implemented in other manners. For example, the system embodiments described above are merely illustrative, and there may be additional divisions of a practical implementation.

The modules described as separate components may or may not be physically separate, and components shown as modules may or may not be physical units, may be located in one place, or may be distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional module in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units can be realized in a form of hardware or a form of hardware and a form of software functional modules.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

Finally, it should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. The intelligent on-line monitoring method of the high-voltage vacuum circuit breaker is characterized by comprising the steps of receiving a circuit breaker monitoring instruction, and confirming the high-voltage vacuum circuit breaker to be operated based on the circuit breaker monitoring instruction, wherein the high-voltage vacuum circuit breaker comprises a vacuum arc-extinguishing chamber and an operating mechanism, and the operating mechanism comprises an electromagnetic coil, a limiting plate and a moving contact transmission rod; confirming a breaker monitoring mechanism, wherein the breaker monitoring mechanism comprises a piezoelectric sensor, an ionization sensor, a thermal conductivity sensor, a displacement sensor and an online communication device, the displacement sensor is used for monitoring the displacement of a moving contact transmission rod, the piezoelectric sensor, the ionization sensor and the thermal conductivity sensor are all arranged in a vacuum arc-extinguishing chamber, the thermal conductivity sensor comprises a resistance wire and a temperature sensor, a breaker control signal is received and sent to an operating mechanism, after the operating mechanism receives the breaker control signal, an electromagnetic coil in the operating mechanism is started, the electromagnetic coil after the operating mechanism is used for performing electromagnetic pushing operation on the moving contact transmission rod to obtain a moving transmission rod, monitoring operation is performed on the moving transmission rod based on a preset monitoring frequency and the displacement sensor, when the moving transmission rod contacts a limiting plate in the operating mechanism, the electromagnetic coil in the operating mechanism is closed to obtain a displacement time sequence, and the displacement time sequence comprises the following steps: The method comprises the steps of obtaining a displacement fluctuation index and an average displacement speed by means of speed analysis on a displacement time sequence, calculating a displacement fault rate according to the displacement fluctuation index and the average displacement speed, comparing the displacement fault rate with a preset displacement fault threshold value, performing vacuum inspection operation on a vacuum arc-extinguishing chamber by means of a piezoelectric sensor, an ionization sensor and a thermal conductivity sensor to obtain an arc-extinguishing vacuum index if the displacement fault rate is smaller than or equal to the displacement fault threshold value, sending a preset safety signal to a preset breaker monitoring platform by means of an online communication device if the arc-extinguishing vacuum index is smaller than or equal to the preset vacuum threshold value, sending a preset early warning signal to the breaker monitoring platform by means of the online communication device if the displacement fault rate is larger than the displacement fault threshold value or the arc-extinguishing vacuum index is larger than the vacuum threshold value, and completing online monitoring of the high-voltage vacuum breaker when the breaker monitoring platform receives the safety signal or the early warning signal.

2. The intelligent on-line monitoring method of high voltage vacuum circuit breaker according to claim 1, wherein the speed analysis of displacement time sequence to obtain displacement fluctuation index and average displacement speed comprises extracting the first displacement time sequenceA displacement value, wherein,Initial value of 1 based on the firstThe first displacement value is confirmed in the displacement time sequenceThe displacement value and the firstA displacement value, whereinThe shift value is associated with the first shift sequenceThe displacement values are adjacent and lag behind the firstThe displacement value of the firstThe shift value is associated with the first shift sequence+1 Displacement values are adjacent and lag behind the first+1 Displacement values, using the firstThe displacement value and the firstThe operation speed is calculated by the displacement values, and the calculation formula is as follows:

, wherein, In order to be able to operate at a speed,Is the firstThe value of the displacement is calculated from the value of the displacement,Is the firstThe value of the displacement is calculated from the value of the displacement,For a preset monitoring time interval, using the firstThe displacement value is the firstThe displacement value and the firstCalculating the running acceleration by the displacement values;

Storing the running speed in a pre-built speed memory to obtain a first memory, storing the running acceleration in a pre-built acceleration memory to obtain a second memory, taking the first memory as the speed memory, taking the second memory as the acceleration memory, and making I= +1, Let I beReturning to the extraction of the first from the displacement time sequenceA step of shifting the value until=-2, Reading out from the first memoryA running speed, read from the second memoryAnd a running acceleration, wherein,=-2 UsingIndividual running speedsAnd calculating a displacement fluctuation index and an average displacement speed by using each running acceleration.

3. The intelligent on-line monitoring method of a high voltage vacuum circuit breaker according to claim 2, wherein the calculation formula of the operation acceleration is as follows:

4. The intelligent on-line monitoring method of a high voltage vacuum circuit breaker according to claim 3, wherein the utilizing isIndividual running speedsThe calculation of displacement fluctuation index and average displacement speed by individual running acceleration comprisesEach of the running accelerations performs the operations of confirming an absolute acceleration according to the running acceleration, wherein the absolute acceleration is an absolute value of the running acceleration, comparing the absolute acceleration with a preset normal acceleration, if the absolute acceleration is larger than or equal to the normal acceleration, recording the absolute acceleration as an abnormal acceleration, summarizing the abnormal acceleration to obtain a plurality of abnormal accelerations, and obtaining a plurality of abnormal accelerations according to the abnormal acceleration and the abnormal accelerationCalculating displacement fluctuation index according to each running accelerationCalculating an average displacement speed from the operation speeds, wherein the average displacement speed isAverage of the individual running speeds.

5. The intelligent on-line monitoring method of a high voltage vacuum circuit breaker according to claim 4, wherein the step of monitoring the high voltage vacuum circuit breaker is based on a plurality of abnormal accelerations andThe calculation of the displacement fluctuation index by the individual running accelerations includesThe absolute acceleration mean value is calculated by each running acceleration, and the calculation formula is as follows:

, wherein, As the absolute acceleration average value of the acceleration,Is thatIn the respective running accelerationThe acceleration of the operation is controlled by the control unit,The displacement fluctuation index is calculated according to a plurality of abnormal accelerations and the average value of the absolute accelerations, and the calculation formula is as follows:

6. The intelligent on-line monitoring method of the high voltage vacuum circuit breaker according to claim 5, wherein the calculating the displacement fault rate according to the displacement fluctuation index and the average displacement speed comprises obtaining a plurality of reference displacement data from a pre-built central database, wherein the reference displacement data comprises a plurality of reference speeds, a plurality of reference accelerations and a storage time, and performing the following operation on each of the plurality of reference displacement data, namely obtaining the reference fluctuation index and the reference average speed based on the plurality of reference speeds and the plurality of reference accelerations in the reference displacement data, and calculating the reference fault rate according to the reference fluctuation index, the reference average speed, the displacement fluctuation index and the average displacement speed, wherein the calculation formula is as follows:

7. The intelligent on-line monitoring method of a high voltage vacuum circuit breaker according to claim 6, wherein the displacement failure rate is calculated as follows:

8. The intelligent on-line monitoring method of the high voltage vacuum circuit breaker according to claim 7, wherein the performing vacuum inspection operation on the vacuum arc-extinguishing chamber by using the piezoelectric sensor, the ionization sensor and the thermal conductivity sensor to obtain an arc-extinguishing vacuum index comprises the steps of reading a sensing pressure value of the piezoelectric sensor in the vacuum arc-extinguishing chamber, generating a plurality of hot electrons in the vacuum arc-extinguishing chamber by using the ionization sensor, wherein the vacuum arc-extinguishing chamber comprises residual gas, performing ionization operation on the residual gas in the vacuum arc-extinguishing chamber by using the plurality of hot electrons to obtain ion current, performing detection operation on the ion current by using the ionization sensor to obtain a sensing current value, performing heating operation on a resistance wire in the thermal conductivity sensor, monitoring a surface temperature of the resistance wire in real time by using the temperature sensor, obtaining a target resistance wire when the surface temperature reaches a preset test temperature, performing natural heat dissipation operation on the target resistance wire to obtain a heat dissipation resistance wire, wherein a heat dissipation time for performing natural heat dissipation operation on the target resistance wire is preset, reading a final temperature of the resistance wire by using the temperature sensor, performing detection operation on the ion current by using the ionization sensor to obtain a sensing current value, and calculating a heat conductivity as follows:

9. The intelligent on-line monitoring method of a high voltage vacuum circuit breaker according to claim 8, wherein the arc extinction vacuum index is calculated as follows:

10. The intelligent on-line monitoring system of the high-voltage vacuum circuit breaker is characterized by comprising a monitoring mechanism confirmation module, a control module and a control module, wherein the monitoring mechanism confirmation module is used for receiving a circuit breaker monitoring instruction and confirming the high-voltage vacuum circuit breaker to be operated based on the circuit breaker monitoring instruction, the high-voltage vacuum circuit breaker comprises a vacuum arc-extinguishing chamber and an operating mechanism, the operating mechanism comprises an electromagnetic coil, a limiting plate and a moving contact transmission rod, the circuit breaker monitoring mechanism is confirmed, the circuit breaker monitoring mechanism comprises a piezoelectric sensor, an ionization sensor, a thermal conductivity sensor, a displacement sensor and an on-line communication device, the displacement sensor is used for monitoring the displacement of the moving contact transmission rod, and the piezoelectric sensor, the ionization sensor and the thermal conductivity sensor are all arranged in the vacuum arc-extinguishing chamber, and the thermal conductivity sensor comprises a resistance wire and a temperature sensor; the transmission displacement analysis module is used for receiving a breaker control signal, sending the breaker control signal to the operating mechanism, starting an electromagnetic coil in the operating mechanism after the operating mechanism receives the breaker control signal, performing electromagnetic pushing operation on the moving contact transmission rod by using the started electromagnetic coil to obtain a motion transmission rod, performing monitoring operation on the motion transmission rod based on a preset monitoring frequency and a displacement sensor, closing the electromagnetic coil in the operating mechanism when the motion transmission rod contacts a limiting plate in the operating mechanism, and obtaining a displacement time sequence, wherein the displacement time sequence comprises the following steps of: The device comprises a displacement value, a displacement time sequence, an arc extinction vacuum inspection module, a monitoring platform communication module, a pre-constructed safety signal and an on-line communication device, wherein the displacement time sequence is subjected to velocity analysis to obtain a displacement fluctuation index and an average displacement velocity, a displacement fault rate is calculated according to the displacement fluctuation index and the average displacement velocity, the displacement fault rate is compared with a preset displacement fault threshold, the arc extinction vacuum inspection module is used for performing vacuum inspection operation on a vacuum arc extinguishing chamber by using a piezoelectric sensor, an ionization sensor and a thermal conductivity sensor to obtain an arc extinction vacuum index if the displacement fault rate is smaller than or equal to the displacement fault threshold, the monitoring platform communication module is used for sending the pre-constructed safety signal to a pre-constructed breaker monitoring platform by using the on-line communication device if the arc extinction vacuum index is smaller than or equal to the preset vacuum threshold, and sending the pre-constructed early warning signal to the breaker monitoring platform by using the on-line communication device if the displacement fault rate is larger than the displacement fault threshold or the arc extinction vacuum index is larger than the vacuum threshold, and completing on-line monitoring of the high-voltage vacuum breaker when the breaker monitoring platform receives the safety signal or the early warning signal.