CN109633339B - Equipment fault detection circuit and method - Google Patents
Equipment fault detection circuit and method Download PDFInfo
- Publication number
- CN109633339B CN109633339B CN201910020165.8A CN201910020165A CN109633339B CN 109633339 B CN109633339 B CN 109633339B CN 201910020165 A CN201910020165 A CN 201910020165A CN 109633339 B CN109633339 B CN 109633339B
- Authority
- CN
- China
- Prior art keywords
- value
- logical
- current
- outputting
- phase
- 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
- 238000001514 detection method Methods 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000004590 computer program Methods 0.000 claims description 18
- 230000000694 effects Effects 0.000 abstract description 3
- 230000004224 protection Effects 0.000 description 31
- 230000009471 action Effects 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 7
- 230000001360 synchronised effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention provides a device fault detection circuit and a method, wherein the method comprises the following steps: the current detection element is used for outputting the detected three-phase current fault information under the condition that the detected three-phase current value of the equipment is smaller than the preset current value; the first AND gate is connected with the current detection element and used for carrying out logical AND operation on the three-phase current fault information to obtain a first logical AND value and outputting the first logical AND value; and the output device is connected with the first AND gate and used for outputting device fault information based on the first logic AND value, wherein the device fault information is used for indicating that the device is in a fault state. By the method and the device, the technical problem that the fault detection of the equipment is inaccurate is solved, and the effect of accurately detecting the equipment fault is achieved.
Description
Technical Field
The invention relates to the field of circuits, in particular to a circuit and a method for detecting equipment faults.
Background
In the related technology, quick-break protection reflecting motor short circuit, overcurrent protection of overload, overload protection (signaling), mechanical locked-rotor protection and blocking protection, and differential protection of 2000kw and above motors are configured for mechanical equipment of motors, but the under-current protection reflecting motor shaft breakage and fan load blade breakage is less, and the protection logic is incomplete. For equipment with voltage class of 6kv and above, a direct current control mode is generally adopted, and the problem of the action of reducing the contact closing protection outlet of a low-current element before starting (equipment is stopped), after starting and in the system voltage moment cannot be solved by the existing low-current protection. The same or similar prior art also has the synchronous motor undercurrent protection introduced with German Siemens technology, the protection solves the problems that the motor supply voltage is interrupted and the motor excitation is still in the process of running the synchronous motor, the current of the synchronous motor is reduced, the electric quantity for judging whether the synchronous motor runs is the motor supply bus voltage, the action voltage is 70 percent of the bus voltage, the voltage is lower than the value, the protection is open, the principle does not solve the undercurrent problem caused by the broken shaft, the broken blade of fan equipment and the instant abnormity of the motor power supply, the protection object is the synchronous motor, the phenomenon of the misoperation of the protection caused by the instant lower supply voltage than a set value exists, and the bus voltage criterion for judging whether the equipment runs is different from the criterion for judging no current.
In view of the above technical problems, no effective solution has been proposed in the related art.
Disclosure of Invention
The embodiment of the invention provides a device fault detection circuit and a device fault detection method, which at least solve the technical problem of inaccurate fault detection of devices in the related art.
According to an embodiment of the present invention, there is provided an apparatus failure detection circuit including: the current detection element is used for outputting the detected three-phase current fault information under the condition that the detected three-phase current value of the equipment is smaller than the preset current value; the first AND gate is connected with the current detection element and used for carrying out logical AND operation on the three-phase current fault information to obtain a first logical AND value and outputting the first logical AND value; and the output device is connected with the first AND gate and used for outputting device fault information based on the first logic AND value, wherein the device fault information is used for indicating that the device is in a fault state.
According to another embodiment of the present invention, there is provided an apparatus failure detection method including: under the condition that the detected three-phase current value of the equipment is smaller than the preset current value, outputting the detected three-phase current fault information; carrying out logical AND operation on the three-phase current fault information to obtain a first logical AND value, and outputting the first logical AND value; and outputting equipment fault information based on the first logical AND value, wherein the equipment fault information is used for indicating that the equipment is in a fault state.
According to a further embodiment of the present invention, there is also provided a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.
According to yet another embodiment of the present invention, there is also provided an electronic device, including a memory in which a computer program is stored and a processor configured to execute the computer program to perform the steps in any of the above method embodiments.
According to the invention, the detected three-phase current fault information is output under the condition that the value of the three-phase current of the equipment is detected to be smaller than the preset current value through the current detection element; performing logical AND operation on the three-phase current fault information through a first AND gate to obtain a first logical AND value, and outputting the first logical AND value; and finally, outputting equipment fault information by the output equipment based on the first logical AND value, wherein the equipment fault information is used for indicating that the equipment is in a fault state. Therefore, the fault of the equipment can be detected through the three-phase current of the equipment. Therefore, the technical problem that the fault detection of the equipment is inaccurate can be solved, and the effect of accurately detecting the equipment fault is achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic diagram of a device fault detection circuit according to an embodiment of the present invention;
FIG. 2 is an overall schematic diagram of a device fault detection circuit according to an embodiment of the present invention;
FIG. 3 is a flow chart of a method of device fault detection according to an embodiment of the present invention;
fig. 4 is a block diagram of a hardware structure of a mobile terminal according to an apparatus failure detection method in an embodiment of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
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.
The present embodiment provides an apparatus failure detection circuit, as shown in fig. 1, including: undercurrent detecting element (I)A<、IB<、IC<) The device comprises a detection module, a control module and a display module, wherein the detection module is used for outputting the detected three-phase current fault information under the condition that the detected three-phase current value of the device is smaller than a preset current value; the first AND gate is connected with the current detection element and used for carrying out logical AND operation on the three-phase current fault information to obtain a first logical AND value and outputting the first logical AND value; and the output device (outlet) is connected with the first AND gate and is used for outputting device fault information based on the first logic AND value, wherein the device fault information is used for indicating that the device is in a fault state.
It should be noted that the present embodiment is mainly directed to detection performed by a device provided with three-phase currents.
It should be noted that the three-phase current fault information in this embodiment includes three current values, for example, "1" or "0". And under the condition that all the three-phase current fault information are 1, performing logical AND operation on the three-phase current fault information to obtain a first logical AND value which is 1, and indicating that the equipment has faults, otherwise, the equipment does not have faults.
As shown in FIG. 1, the current detecting element includes a first current detecting element IA<A second current detecting element IB<And a third current detecting element IC<And the current output unit is respectively connected with each phase of the three-phase current and is respectively used for outputting the fault information of each detected phase of the current when the value of each phase of the current of the equipment is detected to be smaller than a preset current value, wherein each phase of the current fault information comprises the value of each phase of the current, such as 1 or 0, and the fault information of the equipment can be output only when the values of the three-phase current are all 1 at the same time.
In the present embodiment, the current detection element does not output when the equipment is operating normally, and the motor in the equipment and the equipment coupling shaft transmit power when the equipment is operating normallyWhen the blade is broken due to fracture or fan load, IA<、IB<、IC<Current is reduced compared with normal operation current, IA<、IB<、IC<And simultaneously, the fault information is output through the first AND gate outlet, and the motor trips. It should be noted that the preset current in this embodiment may be set based on different devices, for example, a certain percentage of the rated current of the motor is set, the problem of shaft breakage during protection may be set as the no-load current of the motor, and the fan-like blade-breaking may be set as the rated current of 70% -80%, which may be actually measured under certain conditions.
It should be noted that, the protection is started by adopting the simultaneous action of the current detection elements, mainly considering that the three-phase current is simultaneously reduced when the shafting connected with the motor and the equipment is broken or the blade is broken when the fan load is generated, and the protection is not carried out when the A, B, C three-phase current transformer generates the secondary circuit disconnection (CT disconnection), and other protection CT disconnection functions (such as signaling and the like) of the equipment are realized.
In an alternative embodiment, as shown in fig. 2, the circuit further comprises: no-flow detection element (I)WLA、IWLB、IWLB) The device is used for outputting a zero value when the three-phase current values of the device are all zero; and the second AND gate is connected with the no-current detection element and is used for performing logical AND operation on the three-phase current value to obtain a second logical AND value and outputting the second logical AND value.
The no-flow detection element in this embodiment mainly includes: a first no-flow detection element IWLAA second no-flow detection element IWLBAnd a third no-flow detection element IWLBRespectively connected to each of the three phases of current, respectively for outputting a preset value of high potential, for example "1", in the case of detecting that the value of each phase of current of the apparatus is zero.
The action and return values of the low-current element for collecting the motor load are adjustable, and the problem of frequent actions of protection caused by the change of the protection around the action value can be solved due to the fact that the action value and the return value are different (represented by the return coefficient).
Need to explainIs as followsWLA、IWLB、IWLBThree no-current detection elements I are set according to 0.04 times rated current by a no-current criterion element (empirical value)WLA、IWLB、IWLBThe running and the non-stop state of the equipment can be effectively distinguished, and the problem of misoperation of equipment direct current operation safety power transmission protection when the equipment is in the non-stop state is avoided.
In an alternative embodiment, as shown in fig. 2, the circuit further comprises: voltage detection element (U)A<、UB<、UC<) The device comprises a detection module, a control module and a display module, wherein the detection module is used for outputting the detected three-phase voltage fault information under the condition that the detected three-phase voltage value of the device is smaller than a preset voltage value; and the first OR gate (or 1) is connected with the voltage detection element and is used for carrying out logical OR operation on the values of the three-phase voltage to obtain a first logical OR value and outputting the first logical OR value.
Note that the three-phase voltage failure information includes a value of the three-phase voltage, for example, "1" or "0".
Note that, the first voltage detection element U of the three low voltage detection elementsA<A second voltage detection element UB<And a third voltage detection element UC<And the voltage control circuit is respectively connected with each phase voltage in the three-phase voltages and is respectively used for outputting the detected value of each phase voltage in the case that the value of each phase voltage of the equipment is detected to be smaller than a preset voltage value. U shapeA<、UB<、UC<The device can lock the protection misoperation caused by short-time abnormal fluctuation reduction of the power supply of the equipment.
For short-time low voltage (non-atmospheric overvoltage) generated by a motor power supply system, the low voltage can last for several seconds and causes low current of a fan-type load, but the low current is not caused by broken shaft and broken blade of equipment, the protection cannot be operated, and the problem is solved through three low-voltage detection elements UA<、UB<、UC<And either 1, or 2 logic. When a low voltage occurs, the low voltage detection element outputs to an OR 1 gate, an OR 2 gate, and a NAND 1 latch protection output. For non-fan type devices, a low voltage will not cause under current, but will instead cause the device current to increaseIn addition, the protection does not operate, and other protections such as overcurrent and overload protection may operate, which is not within the technical scope related to the embodiment.
In an alternative embodiment, as shown in fig. 2, the circuit further comprises: and the second OR gate is respectively connected with the second AND gate and the first OR gate and is used for carrying out logical OR operation on the second logical AND value and the first logical OR value to obtain a second logical OR value and outputting the second logical OR value. And the NOT gate is respectively connected with the second OR gate and the first AND gate and is used for carrying out logical NOT operation based on the first logical AND value and the second logical OR value to obtain a first logical NAND value and outputting the first logical NAND value. In this embodiment, the latch function can be realized by satisfying one of the voltage detected by the voltage detection element and the current detected by the no-current detection element. The not gate and the first and gate constitute a nand 1 as shown in fig. 2.
It should be noted that the output device in this embodiment is further connected to a nand gate, and is configured to output information that the device is not in a fault state based on the first logical nand value.
T in fig. 2 is a time device connected to the first and gate for transmitting the first logical and value to the output device after a predetermined time to indicate the failure information of the output device.
It should be noted that the time equipment can adopt a short delay reason to protect the false exit when the atmospheric overvoltage of the high-voltage power supply system is avoided, the time is generally set to about 0.05 second, the action time of the lightning arrester caused by the atmospheric overvoltage such as lightning is delayed to avoid, the action of the lightning arrester is caused by the overvoltage, the short-time voltage drop can occur when the lightning arrester is in action and is punctured to the ground, and the low-voltage component U is caused by the low-voltage component U when the low-voltage is generatedA<、UB<、UC<The inherent action time is short and the action is possible, so the outlet delay element is arranged to avoid.
Fig. 3 is a flowchart of an apparatus fault detection method according to an embodiment of the present invention, and as shown in fig. 3, the flowchart includes the following steps:
step S302, outputting the fault information of the detected three-phase current under the condition that the value of the three-phase current of the equipment is detected to be smaller than the preset current value;
step S304, carrying out logical AND operation on the three-phase current fault information to obtain a first logical AND value, and outputting the first logical AND value;
and step S306, outputting equipment fault information based on the first logical AND value, wherein the equipment fault information is used for indicating that the equipment is in a fault state.
Through the steps, the detected three-phase current fault information is output under the condition that the value of the three-phase current of the equipment is detected to be smaller than the preset current value through the current detection element; performing logical AND operation on the three-phase current fault information through a first AND gate to obtain a first logical AND value, and outputting the first logical AND value; and finally, outputting equipment fault information by the output equipment based on the first logical AND value, wherein the equipment fault information is used for indicating that the equipment is in a fault state. Therefore, the fault of the equipment can be detected through the three-phase current of the equipment. Therefore, the technical problem that the fault detection of the equipment is inaccurate can be solved, and the effect of accurately detecting the equipment fault is achieved.
Alternatively, the execution subject of the above steps may be a terminal or the like, but is not limited thereto.
Note that three under current detection elements I may be usedA<、IB<、IC<And detecting the three-phase current. The input current can be taken to a device (high-voltage) switch with a current transformer, and can be reused with other protection.
In an alternative embodiment, in the case where the value of each phase current of the equipment is detected to be smaller than a predetermined current value, the fault information of each detected phase current is outputted. Outputting a zero value under the condition that the three-phase current values of the equipment are all zero; and performing logical AND operation on the three-phase current values to obtain a second logical AND value, and outputting the second logical AND value. In the case where it is detected that the value of each phase current of the apparatus is zero, a high potential preset value, for example, "1", is output. In this embodiment, only when the three-phase current is not outputted at the same time, the high potential "1" value is outputted at the same time.
It should be noted that the fault information of each phase current includes a value of each phase current, for example, "1", or "0", and only when the values of the three phase currents are all 1 at the same time, the fault information of the device is outputted
It should be noted that three no-flow detection elements I may be usedWLA、IWLB、IWLBAnd detecting whether the three-phase current has current output. Three current detecting elements I for taking input currentA<、IB<、IC<。
In an alternative embodiment: under the condition that the detected three-phase voltage value of the equipment is smaller than the preset voltage value, outputting the detected three-phase voltage fault information; and carrying out logic OR operation on the three-phase voltage fault information to obtain a first logic OR value, and outputting the first logic OR value. In the present embodiment, in the case where it is detected that the value of each phase voltage of the device is smaller than a predetermined voltage value, the fault information of each phase voltage detected is output.
Note that the three-phase voltage failure information includes a value of the three-phase voltage, for example, "1" or "0".
It should be noted that three voltage detection elements U may be usedA<、UB<、UC<And detecting the three-phase voltage. And voltage is obtained to the secondary side of a voltage transformer of a power supply bus of the motor equipment.
In an optional embodiment, performing a logical or operation based on the second logical and value and the first logical or value to obtain a second logical or value, and outputting the second logical or value; and performing logical negation operation based on the first logical AND value and the second logical OR value to obtain a first logical NAND value, and outputting the first logical NAND value. Outputting information that the device is not in a failure state based on the first logical nand value.
In an alternative embodiment, the first logical and value may need to be communicated to the output device after a predetermined time to indicate a failure message of the output device. The fault information may be transmitted through an outlet or an output device.
As can be seen from the above, IA<、IB<、IC<Setting the residual current according to the condition that the residual current is less than the running current of the equipment, for example, setting the residual current to be a certain percentage of the rated current of the motor, setting the problem of shaft breakage in protection to be the no-load current of the motor, setting the rated current to be 70-80% for fan blade breakage and actually measuring the current under the condition.
IWLA、IWLB、IWLBSetting the non-current criterion element according to 0.04 times rated current (empirical value), UA<、UB<、UC<The low voltage component allows the lowest voltage setting according to the equipment operation. The short delay t is set to about 0.05 second.
The method provided by the embodiment of the application can be executed in a mobile terminal, a computer terminal or a similar operation device. Taking the operation on the mobile terminal as an example, fig. 4 is a hardware structure block diagram of the mobile terminal of the device failure detection method according to the embodiment of the present invention. As shown in fig. 4, the mobile terminal 40 may include one or more (only one shown in fig. 4) processors 402 (the processor 402 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 404 for storing data, and optionally may also include a transmission device 406 for communication functions and an input-output device 408. It will be understood by those skilled in the art that the structure shown in fig. 4 is only an illustration and is not intended to limit the structure of the mobile terminal. For example, the mobile terminal 40 may also include more or fewer components than shown in FIG. 4, or have a different configuration than shown in FIG. 4.
The memory 404 may be used for storing computer programs, for example, software programs and modules of application software, such as a computer program corresponding to the device failure detection method in the embodiment of the present invention, and the processor 402 executes various functional applications and data processing by running the computer programs stored in the memory 404, so as to implement the method described above. The memory 404 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 404 may further include memory located remotely from the processor 402, which may be connected to the mobile terminal 40 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission device 406 is used for receiving or sending data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the mobile terminal 40. In one example, the transmission device 406 includes a Network adapter (NIC) that can be connected to other Network devices through a base station so as to communicate with the internet. In one example, the transmission device 406 may be a Radio Frequency (RF) module, which is used for communicating with the internet in a wireless manner.
Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
Embodiments of the present invention also provide a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.
Alternatively, in the present embodiment, the storage medium may be configured to store a computer program for executing the above steps.
Optionally, in this embodiment, the storage medium may include, but is not limited to: various media capable of storing computer programs, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.
Embodiments of the present invention also provide an electronic device comprising a memory having a computer program stored therein and a processor arranged to run the computer program to perform the steps of any of the above method embodiments.
Optionally, the electronic apparatus may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor, and the input/output device is connected to the processor.
Alternatively, in this embodiment, the processor may be configured to execute the above steps through a computer program.
Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the principle of the present invention should be included in the protection scope of the present invention.
Claims (17)
1. An equipment fault detection circuit, comprising:
the current detection element is used for outputting the detected three-phase current fault information under the condition that the detected three-phase current value of the equipment is smaller than the preset current value;
the first AND gate is connected with the current detection element and used for performing logical AND operation on the three-phase current fault information to obtain a first logical AND value and outputting the first logical AND value;
the output device is connected with the first AND gate and is used for outputting device fault information based on the first logical AND value, wherein the device fault information is used for indicating that the device is in a fault state; wherein the circuit further comprises: the current-free detection element is used for outputting a high-potential preset value under the condition that the three-phase current values of the equipment are all zero; and the second AND gate is connected with the no-current detection element and is used for performing logical AND operation on the three-phase current fault information to obtain a second logical AND value and outputting the second logical AND value.
2. The circuit of claim 1, wherein the current sensing element comprises:
and the first current detection element, the second current detection element and the third current detection element are respectively connected with each phase of current in the three-phase current and are respectively used for outputting the detected fault information of each phase of current under the condition that the value of each phase of current of the equipment is detected to be smaller than the preset current value.
3. The circuit of claim 1, wherein the no-flow detection element comprises:
the first no-current detection element, the second no-current detection element and the third no-current detection element are respectively connected with each phase of current in the three-phase current and are respectively used for outputting the high-potential preset value under the condition that the value of each phase of current of the equipment is detected to be zero.
4. The circuit of claim 1, further comprising:
a voltage detection element for outputting the detected three-phase voltage fault information in the case where it is detected that the value of the three-phase voltage of the device is less than a predetermined voltage value;
and the first OR gate is connected with the voltage detection element and is used for carrying out logic OR operation on the three-phase voltage fault information to obtain a first logic OR value and outputting the first logic OR value.
5. The circuit of claim 4, wherein the voltage sensing element comprises:
and the first voltage detection element, the second voltage detection element and the third voltage detection element are respectively connected with each phase voltage in the three-phase voltages and are respectively used for outputting the detected fault information of each phase voltage under the condition that the value of each phase voltage of the equipment is detected to be smaller than the preset voltage value.
6. The circuit of claim 4, further comprising:
the second or gate is respectively connected with the second and gate and the first or gate, and is used for performing logical or operation on the second logical and value and the first logical or value to obtain a second logical or value and outputting the second logical or value;
and the NOT gate is respectively connected with the second OR gate and the first AND gate and is used for carrying out logical NOT operation based on the first logical AND value and the second logical OR value to obtain a first logical NAND value and outputting the first logical NAND value.
7. The circuit of claim 6,
the output device is also connected with the NOT gate and is used for outputting the information that the device is not in the fault state based on the first logic NAND value.
8. The circuit of claim 1, further comprising:
and the time device is connected with the first AND gate and is used for transmitting the first logical AND value to the output device after a preset time so as to instruct the output device to output the fault information of the device.
9. An equipment fault detection method, comprising:
under the condition that the detected three-phase current value of the equipment is smaller than the preset current value, outputting the detected three-phase current fault information;
performing logical AND operation on the three-phase current fault information to obtain a first logical AND value, and outputting the first logical AND value;
outputting equipment fault information based on the first logical AND value, wherein the equipment fault information is used for indicating that the equipment is in a fault state; outputting a high-potential preset value under the condition that the three-phase current values of the equipment are all zero; and performing logical AND operation on the three-phase current fault information to obtain a second logical AND value, and outputting the second logical AND value.
10. The method of claim 9, wherein outputting the high-potential preset value in the event that the values of the three-phase currents of the device are all detected to be zero comprises:
and outputting the high potential preset value when the value of each phase current of the equipment is detected to be zero.
11. The method of claim 9, further comprising:
outputting the detected three-phase voltage fault information under the condition that the detected three-phase voltage value of the equipment is smaller than a preset voltage value;
and carrying out logic OR operation on the three-phase voltage fault information to obtain a first logic OR value, and outputting the first logic OR value.
12. The method of claim 11, wherein in the case where it is detected that the value of the three-phase voltage of the device is less than the predetermined voltage value, outputting the detected three-phase voltage fault information comprises:
and outputting the detected fault information of each phase voltage of the equipment under the condition that the detected value of each phase voltage is smaller than the preset voltage value.
13. The method of claim 11, further comprising:
performing logical OR operation on the second logical AND value and the first logical OR value to obtain a second logical OR value, and outputting the second logical OR value;
and performing logical negation operation based on the first logical AND value and the second logical OR value to obtain a first logical NAND value, and outputting the first logical NAND value.
14. The method of claim 13, further comprising:
outputting information that the device is not in a failure state based on the first logical NAND value.
15. The method of claim 9, further comprising:
transmitting the first logical AND value to an output device after a predetermined time to instruct the output device to output fault information of the device.
16. A storage medium, in which a computer program is stored, wherein the computer program is arranged to perform the method of any of claims 9 to 15 when executed.
17. An electronic device comprising a memory and a processor, wherein the memory has stored therein a computer program, and wherein the processor is arranged to execute the computer program to perform the method of any of claims 9 to 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910020165.8A CN109633339B (en) | 2019-01-09 | 2019-01-09 | Equipment fault detection circuit and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910020165.8A CN109633339B (en) | 2019-01-09 | 2019-01-09 | Equipment fault detection circuit and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109633339A CN109633339A (en) | 2019-04-16 |
| CN109633339B true CN109633339B (en) | 2021-10-08 |
Family
ID=66060388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910020165.8A Active CN109633339B (en) | 2019-01-09 | 2019-01-09 | Equipment fault detection circuit and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109633339B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111725778B (en) * | 2020-05-27 | 2022-03-11 | 湖南省湘电试验研究院有限公司 | Line protection CT disconnection locking method, system and medium under condition of reversed trend |
| WO2022247637A1 (en) * | 2021-05-26 | 2022-12-01 | 佛山市顺德区美的电子科技有限公司 | Fault detection method and apparatus, and device, system and storage medium |
| CN116908677B (en) * | 2023-06-06 | 2024-08-30 | 华能上海燃机发电有限责任公司 | Circulating water filter screen on-line monitoring system and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751735A (en) * | 2011-04-19 | 2012-10-24 | 巨争号 | Generating set output reducing and generating set tripping device used in case of overload of contact outgoing lines of power plant |
| CN108873832A (en) * | 2018-06-07 | 2018-11-23 | 大唐韩城第二发电有限责任公司 | A kind of flogic system and device of generator failure intertripping stator cooling water pump |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170272024A1 (en) * | 2016-03-21 | 2017-09-21 | Simmonds Precision Products, Inc. | Motor drive, harness, and motor fault detection for a multi-channel electric brake actuator controller |
-
2019
- 2019-01-09 CN CN201910020165.8A patent/CN109633339B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751735A (en) * | 2011-04-19 | 2012-10-24 | 巨争号 | Generating set output reducing and generating set tripping device used in case of overload of contact outgoing lines of power plant |
| CN108873832A (en) * | 2018-06-07 | 2018-11-23 | 大唐韩城第二发电有限责任公司 | A kind of flogic system and device of generator failure intertripping stator cooling water pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109633339A (en) | 2019-04-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109633339B (en) | Equipment fault detection circuit and method | |
| EP2580829B1 (en) | Breaker failure protection of hvdc circuit breakers | |
| US20150200534A1 (en) | Digital protection relay, digital protection relay test device, and digital protection relay test method | |
| EP2728691B1 (en) | Fault current detecting circuit | |
| US10651681B2 (en) | Electronic status reporting circuit breaker | |
| CN104935026B (en) | Battery cell device with battery cell and current limiting circuit and corresponding method | |
| US11022640B2 (en) | Single phase fault isolation and restoration for loss of voltage fault in power distribution network | |
| US20160020601A1 (en) | Power bay protection device and a method for portecting power bays | |
| CN111276951B (en) | Direct current protection method, system and equipment based on superconducting current limiter | |
| EP2110917A2 (en) | Method of setting a ground fault trip function for a trip unit and a trip unit having a defined trip function for ground fault protection | |
| CN112865073B (en) | Safety and stability control system switching method, device and equipment for power quick-drop fault | |
| EP2893623B1 (en) | Apparatus and methods for input protection for power converters | |
| CN107634506A (en) | A substation overcurrent protection method, device and system | |
| US20210104888A1 (en) | Single phase fault isolation and restoration for power distribution network | |
| CN113471931A (en) | Power supply loop protection device and method | |
| JP2016220265A (en) | Power distribution board | |
| EP3021441B1 (en) | Selective event reaction processing in power control | |
| CN110994570A (en) | Power distribution network protection method and system, protection equipment and storage medium | |
| US11588347B2 (en) | Single phase fault isolation and restoration with load estimation | |
| CN116298840A (en) | Primary switch equipment action diagnosis method, device, equipment and storage medium | |
| CN112630584A (en) | Generator end abnormity monitoring system and method and electronic equipment | |
| CN107181250B (en) | Parallel direct-current power supply system and fault isolation method | |
| US11626753B2 (en) | Single phase fault isolation and restoration with loop avoidance | |
| CN119376317B (en) | Control method and device for bus device power supply, storage medium and electronic device | |
| US11646603B2 (en) | Single phase fault isolation and restoration with loop avoidance for multiple tie-in devices |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |