CN214252482U - Discharge monitoring system for power equipment - Google Patents
Discharge monitoring system for power equipment Download PDFInfo
- Publication number
- CN214252482U CN214252482U CN202022840212.4U CN202022840212U CN214252482U CN 214252482 U CN214252482 U CN 214252482U CN 202022840212 U CN202022840212 U CN 202022840212U CN 214252482 U CN214252482 U CN 214252482U
- Authority
- CN
- China
- Prior art keywords
- monitoring system
- circuit
- discharge monitoring
- sensor
- electrical signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 71
- 238000005070 sampling Methods 0.000 claims abstract description 25
- 238000002955 isolation Methods 0.000 claims abstract description 23
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 230000003321 amplification Effects 0.000 claims description 13
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 9
- 230000001939 inductive effect Effects 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000012795 verification Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims 1
- 239000004020 conductor Substances 0.000 abstract description 14
- 238000009434 installation Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010291 electrical method Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
本实用新型公开了一种电力设备的放电监测系统。通过：传感器，用于感应电力系统中至少一个电力设备的电信号；隔离电路，与传感器电连接，用于对传感器检测到的电信号进行隔离与滤波；采样电路，与隔离电路电连接，用于采集隔离电路处理后的电信号；微控制器，与采样电路连接，用于检测电信号是否符合标准。通过本实用新型，解决了相关技术中导体局部放电监测系统安装复杂、功率大的问题。
The utility model discloses a discharge monitoring system of electric equipment. Pass through: a sensor, used for sensing the electrical signal of at least one power device in the power system; an isolation circuit, electrically connected with the sensor, used to isolate and filter the electrical signal detected by the sensor; a sampling circuit, electrically connected with the isolation circuit, with It is used to collect the electrical signal processed by the isolation circuit; the microcontroller is connected with the sampling circuit to detect whether the electrical signal meets the standard. The utility model solves the problems of complicated installation and high power of the conductor partial discharge monitoring system in the related art.
Description
Technical Field
The utility model relates to a discharge monitoring technology field particularly, relates to a power equipment's monitoring system that discharges.
Background
In recent years, with the rapid development of power grid construction, the number of various high-voltage power equipment such as GIS, switch cabinets, transformers and the like is increasing, and the internal faults of the high-voltage power equipment are also increasing.
The internal faults of the high-voltage power equipment are insulation faults mostly, and partial discharge is an important precursor and an expression form of insulation degradation, so that the partial discharge condition of the conductor can be monitored on line, and further insulation damage and accidents can be effectively avoided.
However, the conductor partial discharge monitoring system used in the related art is complex to install, high in cost, high in power consumption and not suitable for the batch monitoring requirement of a large amount of equipment.
Aiming at the problems of complex installation and high power of a conductor partial discharge monitoring system in the related art, an effective solution is not provided at present.
SUMMERY OF THE UTILITY MODEL
The utility model provides a power equipment's monitoring system that discharges to solve the problem that the installation of conductor partial discharge monitoring system is complicated, power is big among the correlation technique.
According to an aspect of the utility model, a power equipment's discharge monitoring system is provided. The system comprises: a sensor for sensing an electrical signal of at least one electrical device in the power system; the isolation circuit is electrically connected with the sensor and used for isolating and filtering the electric signal detected by the sensor; the sampling circuit is electrically connected with the isolation circuit and is used for acquiring the electric signal processed by the isolation circuit; and the microcontroller is connected with the sampling circuit and used for detecting whether the electric signal meets the standard or not.
Optionally, the sensor comprises: the sensor comprises a capacitance sensor and an inductance sensor, wherein the capacitance sensor is a ring-wrapped differential capacitance sensor.
Optionally, each capacitive sensor has two signal outputs respectively connected to four input ports of the detection unit, and the signal output of the inductive sensor is connected to the input port of the detection unit.
Optionally, the isolation circuit comprises: and the micro mutual inductor and the passive filter circuit are used for isolating and filtering the electric signals of the sensors.
Optionally, the discharge monitoring system further comprises: and the gating circuit adopts a linear switch chip and is used for selectively conducting multiple paths of input signals.
Optionally, the discharge monitoring system further comprises: and the amplifying circuit adopts a two-stage amplifying circuit and is used for carrying out multi-stage amplification processing on the electric signal.
Optionally, the amplifying circuit comprises: the front stage adopts a differential amplification circuit and the rear stage adopts a reverse amplification circuit, wherein the differential amplification circuit is used for extracting and amplifying differential signals extracted from the electric signals, and the reverse amplification circuit is used for secondarily amplifying the differential signals extracted from the electric signals.
Optionally, the discharge monitoring system further comprises: and the AD sampling circuit is a parallel analog-to-digital conversion chip for performing analog-to-digital conversion and is used for reading and performing digital-to-analog conversion on the electric signal.
Optionally, the discharge monitoring system further comprises: and the communication circuit is connected with the AD sampling circuit and is used for outputting the electrical signal after the digital-to-analog conversion to an external computer.
Optionally, the discharge monitoring system further comprises: and the checking circuit is connected with the isolating circuit and used for checking the electric signal.
Optionally, the discharge monitoring system further comprises: a power supply system, the power supply system comprising: the analog power supply and the digital power supply are connected with the input power supply through the filter circuit.
Through the utility model discloses, adopt: a sensor for sensing an electrical signal of at least one electrical device in the power system; the isolation circuit is electrically connected with the sensor and used for isolating and filtering the electric signal detected by the sensor; the sampling circuit is electrically connected with the isolation circuit and is used for acquiring the electric signal processed by the isolation circuit; and the microcontroller is connected with the sampling circuit and used for detecting whether the electric signal meets the standard or not, and the problems of complex installation and high power of a conductor partial discharge monitoring system in the related technology are solved. And further, the effects of reducing the installation complexity and the power of the conductor partial discharge monitoring system are achieved.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation.
In the drawings:
fig. 1 is a schematic diagram of a discharge monitoring system of an electrical power device provided according to an embodiment of the present invention; and
fig. 2 is a schematic diagram of an alternative discharge monitoring system for an electrical power device provided in accordance with an embodiment of the present invention.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances for purposes of describing the embodiments of the invention herein.
In order to solve the problem that the internal faults of high-voltage power equipment are increasing continuously, a scheme for monitoring the internal faults by monitoring the partial discharge condition of a conductor on line appears in the related art, wherein the partial discharge monitoring technology in the related art comprises the following schemes:
the main classification is two main categories: one type is a non-electrical method, which mainly comprises a sound measuring method, a light measuring method, a chemical detection method, a temperature measuring method and the like; the other is an electrical measurement method, which mainly adopts two types of sensors, and the other type is an electromagnetic induction sensor based on the Rogowski coil measurement principle and mainly comprises an electromagnetic coupling method, an inductive coupling method, a directional coupling method and the like; the other type of capacitive sensor is based on the capacitive coupling principle and mainly comprises a pulse current method, a difference method and a capacitive coupling method. The existing detection technologies in the market respectively comprise: oscillation wave partial discharge detection, ultrasonic wave partial discharge detection, high-frequency partial discharge detection, ultrahigh frequency partial discharge detection and the like.
However, the conductor partial discharge monitoring system used in the related art is complex to install, high in cost, high in power consumption and not suitable for the batch monitoring requirement of a large amount of equipment.
Based on this, the present application intends to provide a solution to the above technical problem, the details of which will be explained in the following embodiments.
According to the utility model discloses an embodiment provides a power equipment's monitoring system that discharges.
Fig. 1 is a schematic diagram of a discharge monitoring system of an electrical power device according to an embodiment of the present invention. As shown in fig. 1, the apparatus includes:
a sensor 10 for sensing an electrical signal of at least one electrical device in the power system.
And an isolation circuit 20 electrically connected to the sensor 10 for isolating and filtering the electrical signal detected by the sensor 10.
And the sampling circuit 30 is electrically connected with the isolation circuit 20 and is used for acquiring the electrical signal processed by the isolation circuit 20.
And the microcontroller 40 is connected with the sampling circuit 30 and is used for detecting whether the electric signal meets the standard or not.
Alternatively, microcontroller 40 may be an STM32F407VGT6 chip based on a Cortex-M4 core. The frequency of the chip system can reach 240MHz at most, and the chip system can be used for generating a high-frequency clock signal required by an AD sampling chip; the RAM capacity is up to 192KB, and the method can be used for storing and sorting a large amount of sampling data; the system supports a DMA (direct memory access) function, can realize the rapid storage of data from a peripheral to a memory, does not need the intervention of a processor, and provides a hardware basis for the rapid storage and processing of the data.
Specifically, the discharge monitoring system of the power equipment of the embodiment can realize the functional requirements of acquisition, filtering, amplification, analog-to-digital conversion and wireless transmission of a partial discharge signal through the cooperation of the sensor 10, the isolation circuit 20, the sampling circuit 30 and the microcontroller 40, thereby monitoring the partial discharge condition of the conductor of the equipment in real time on line and preventing the insulation of the conductor from being further damaged. Each circuit module has simple structure and low cost, and is suitable for the requirements of online monitoring of the insulation state of the conductor of the equipment, and batch production and installation of the equipment. Meanwhile, the total power consumption of the system is low, and the total running power of the monitoring module is not more than 5W through verification.
The embodiment of the utility model provides a discharge monitoring system of power equipment, through sensor 10, is used for the signal of telecommunication of at least one power equipment in the response power system; an isolation circuit 20 electrically connected to the sensor 10 for isolating and filtering the electrical signal detected by the sensor 10; the sampling circuit 30 is electrically connected with the isolation circuit 20 and is used for acquiring the electrical signal processed by the isolation circuit 20; and the microcontroller 40 is connected with the sampling circuit 30 and used for detecting whether the electric signal meets the standard or not, and the problems of complex installation and high power of a conductor partial discharge monitoring system in the related technology are solved. And further, the effects of reducing the installation complexity and the power of the conductor partial discharge monitoring system are achieved.
Optionally, in the utility model provides an in power equipment's discharge monitoring system, the sensor includes: the sensor comprises a capacitance sensor and an inductance sensor, wherein the capacitance sensor is a ring-wrapped differential capacitance sensor.
Specifically, as shown in fig. 2, the capacitance sensor is a capacitance sensor, the inductance sensor is an inductance sensor, the capacitance sensor may include capacitance sensor 1 and capacitance sensor 2, capacitance sensor 1 and capacitance sensor 2 are two novel ring-wrapping differential capacitance sensors, and each sensor has two paths of signal outputs respectively connected to four input ports of the detection unit.
Optionally, in the utility model provides an among the power equipment's the monitoring system that discharges, every capacitance sensor has two way signal output, connects detecting element's four ways input port inductance sensor respectively, and detecting element's input port is connected to inductance sensor's signal output.
Optionally, in the discharge monitoring system of power equipment provided in the embodiment of the present invention, the isolation circuit includes: and the micro mutual inductor and the passive filter circuit are used for isolating and filtering the electric signals of the sensors.
Optionally, in the utility model provides an in the monitoring system that discharges of power equipment, the monitoring system that discharges still includes: and the gating circuit adopts a linear switch chip and is used for selectively conducting multiple paths of input signals.
Specifically, the gating circuit realizes selective conduction of multiple input signals through the microcontroller.
Optionally, in the utility model provides an in the monitoring system that discharges of power equipment, the monitoring system that discharges still includes: and the amplifying circuit adopts a two-stage amplifying circuit and is used for carrying out multi-stage amplification processing on the electric signal.
Optionally, in the discharge monitoring system of power equipment provided in the embodiment of the present invention, the amplifying circuit includes: the front stage adopts a differential amplification circuit and the rear stage adopts a reverse amplification circuit, wherein the differential amplification circuit is used for extracting and amplifying differential signals extracted from the electric signals, and the reverse amplification circuit is used for secondarily amplifying the differential signals extracted from the electric signals.
Optionally, in the utility model provides an in the monitoring system that discharges of power equipment, the monitoring system that discharges still includes: and the AD sampling circuit is a parallel analog-to-digital conversion chip for performing analog-to-digital conversion and is used for reading and performing digital-to-analog conversion on the electric signal.
Specifically, the AD sampling circuit may use a sampling chip with low price and good performance to implement analog-to-digital conversion, and the chip is a 12-bit parallel analog-to-digital conversion chip, which may implement fast reading of sampling data.
Optionally, in the utility model provides an in the monitoring system that discharges of power equipment, the monitoring system that discharges still includes: and the communication circuit is connected with the AD sampling circuit and is used for outputting the electrical signal after the digital-to-analog conversion to an external computer.
Specifically, the computer is used for receiving the measurement data uploaded by the monitoring unit and displaying the data to a measurer in an intuitive graphic mode through the upper computer.
Optionally, in the utility model provides an in the monitoring system that discharges of power equipment, the monitoring system that discharges still includes: and the checking circuit is connected with the isolating circuit and used for checking the electric signal.
Optionally, in the utility model provides an in the monitoring system that discharges of power equipment, the monitoring system that discharges still includes: a power supply system, the power supply system comprising: the analog power supply and the digital power supply are connected with the input power supply through the filter circuit.
Specifically, the analog power supply circuit is an analog signal, and the digital power supply circuit is a digital signal. The voltage conversion chips in the power supply system can all adopt linear power supply chips, and although the power consumption of the linear power supply chips is higher than that of the switching power supply chips, the noise of the linear power supply chips is far less than that of the switching power supply chips, so that the system noise is favorably reduced.
Through the utility model discloses power equipment's discharge monitoring system, the system comprises capacitive sensor, inductive sensor, buffer circuit, gating circuit, amplifier circuit, AD, MPU (microcontroller), electrical power generating system and computer, can realize the collection of partial discharge signal, filtering, enlargies, analog-to-digital conversion and wireless transmission's functional requirement.
The above are merely examples of the present invention, and are not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (11)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022840212.4U CN214252482U (en) | 2020-11-30 | 2020-11-30 | Discharge monitoring system for power equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022840212.4U CN214252482U (en) | 2020-11-30 | 2020-11-30 | Discharge monitoring system for power equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214252482U true CN214252482U (en) | 2021-09-21 |
Family
ID=77735681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022840212.4U Active CN214252482U (en) | 2020-11-30 | 2020-11-30 | Discharge monitoring system for power equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214252482U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119165312A (en) * | 2024-11-21 | 2024-12-20 | 国网天津市电力公司电力科学研究院 | A circuit for collecting discharge signals of different frequencies from gas-filled switch cabinets |
-
2020
- 2020-11-30 CN CN202022840212.4U patent/CN214252482U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119165312A (en) * | 2024-11-21 | 2024-12-20 | 国网天津市电力公司电力科学研究院 | A circuit for collecting discharge signals of different frequencies from gas-filled switch cabinets |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103278751A (en) | Partial discharge comprehensive itinerant detector for high voltage electric power equipment | |
| CN106501588B (en) | A method for monitoring short-circuit current in transformer near area | |
| CN102841297B (en) | Self-adaptive partial-discharge monitoring method and device for sampling frequency | |
| CN207096378U (en) | A kind of acoustoelectric combined partial discharge detecting system of switch cubicle | |
| CN104360252A (en) | Acoustic and electric signal acquiring device and method of multichannel switch cabinet | |
| CN103616625A (en) | External sensor system used for detecting partial discharge | |
| CN204855722U (en) | Insulating tubular busbar partial discharge detector system of 10kV | |
| CN214252482U (en) | Discharge monitoring system for power equipment | |
| CN108680834A (en) | A kind of detection method of the transformer insulation state based on PDC | |
| CN204269766U (en) | A multi-channel switch cabinet acoustic and electrical signal acquisition device | |
| CN201885852U (en) | Online monitoring device for vacuum degree of vacuum circuit breaker on basis of pulse discharging detection | |
| CN208092189U (en) | Compound field based on superfrequency method couples paper oil insulation partial discharge detecting system | |
| CN202066935U (en) | Dual-sensor orientation coupling anti-interference based cable partial discharge detection device | |
| CN103941123A (en) | Cable insulation online monitoring system | |
| CN106291183A (en) | A kind of anti-interference multi-band signal harvester | |
| CN111707913A (en) | A partial discharge detection device for a power switch cabinet | |
| CN203950018U (en) | High-tension cable partial discharge detecting sensor based | |
| CN202049978U (en) | Photovoltaic array conflux box | |
| CN112986665B (en) | Secondary grounding grid voltage monitoring device and method | |
| CN202383244U (en) | Partial discharge detection device of gas insulated switchgear | |
| CN205507011U (en) | Transformer local discharge on -line monitoring equipment based on DSP | |
| CN205176134U (en) | Join in marriage net harmonic monitoring facilities | |
| CN202502199U (en) | Cable ultrahigh frequency partial discharge detection apparatus | |
| CN202256535U (en) | A switchgear arrester online monitoring device with a touch screen | |
| CN203385785U (en) | Power supply line detection circuit and power supply distribution monitoring apparatus generally used for AC-DC |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |