CN113300338B - Method, device, medium and equipment for suppressing relay protection misoperation of power supply system - Google Patents
Method, device, medium and equipment for suppressing relay protection misoperation of power supply system Download PDFInfo
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- CN113300338B CN113300338B CN202110578440.5A CN202110578440A CN113300338B CN 113300338 B CN113300338 B CN 113300338B CN 202110578440 A CN202110578440 A CN 202110578440A CN 113300338 B CN113300338 B CN 113300338B
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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Abstract
The application provides a method, a device, a medium and equipment for inhibiting relay protection misoperation of a power supply system, wherein by detecting a zero sequence current signal in real time, when the zero sequence current signal is detected, the cause of the zero sequence current signal is determined, and when the cause of the zero sequence current signal is the grounding of a bus of the power supply system, the relay protection device is controlled to execute tripping action; when the zero sequence current signal is detected, the triggering reason of the zero sequence current signal needs to be further determined, and the relay protection device is controlled to execute tripping action only when the triggering reason of the zero sequence current signal is the bus grounding of the power supply system, so that tripping action caused by zero sequence current due to gap discharge of a transformer can be avoided, namely, misoperation of the relay protection of the power supply system is avoided, and the power supply reliability and the power utilization effect of the power supply system are improved.
Description
Technical Field
The application belongs to the technical field of electricians, and particularly relates to a method, a device, a medium and equipment for inhibiting relay protection misoperation of a power supply system.
Background
The power system is being developed in a large scale, the voltage level and the capacity of the power system are increased, various transient processes in the system are more serious, and the protection of components of the power system is greatly influenced. Transient processes caused by switching operations of high voltage ac circuit breakers are more severe. The high-frequency transient process generated by the transient overvoltage phenomenon caused by continuous extinction of arc among contacts and the reburning process in the action process of the circuit breaker can generate serious interference on a microcomputer protection device, particularly the generated electric fast transient pulse group can cause over-high zero sequence voltage of each phase on a bus, and cause the gap breakdown of a neutral point ungrounded transformer. When the neutral point of the transformer is broken down, zero sequence current passes through the circuit, and when the current is continuous and the amplitude reaches the zero sequence protection action condition, the zero sequence current protection action can cause the non-fault circuit to be cut off, and the misoperation of the relay protection device is caused.
When the circuit breaker breaks fault current, because the breaking line power is larger, mechanical elements act with time delay and the like, when the circuit breaker breaks the line, the burning off of the arc causes serious unbalanced voltage of the line, and the generated electric fast transient pulse group generates higher overvoltage on the neutral point of the transformer with the neutral point not grounded because of asymmetry and slight dissynchrony. The overvoltage generated at the neutral point when coinciding with a permanent fault is higher, possibly even 2 times the overvoltage occurring at the disconnected line. Such high voltages are highly likely to cause gap breakdown of the neutral point ungrounded transformer.
If the neutral point of the transformer is broken down, the operation mode of the transformer is changed from non-grounding to neutral point direct grounding during discharging, and zero-sequence current passes through the circuit. When the current is continuous and the amplitude reaches the zero sequence protection action condition, the relay protection tripping in the circuit can cause the non-fault circuit to be cut off, and the normal operation of the system is affected.
Disclosure of Invention
The application aims to overcome the defects of the prior art, and provides a method, a device, a medium and equipment for inhibiting relay protection misoperation of a power supply system aiming at the situation of relay protection device misoperation caused by neutral point gap breakdown discharge so as to avoid relay protection misoperation of the power supply system.
According to one aspect of the present application, there is provided a method for suppressing malfunction of relay protection of a power supply system, including: detecting a zero sequence current signal in real time; when the zero sequence current signal is detected, determining the triggering reason of the zero sequence current signal; and when the zero sequence current signal is caused by the grounding of the bus of the power supply system, controlling the relay protection device to execute tripping action.
In an embodiment, the detecting the zero sequence current signal in real time includes: and detecting the zero sequence current signal in real time through an impedance relay arranged between a bus of the power supply system and the ground surface.
In an embodiment, the determining the cause of the zero sequence current signal includes: acquiring an input voltage value and a current value of the impedance relay; forming a first voltage signal corresponding to the voltage value and a second voltage signal corresponding to the current value according to the voltage value and the current value; and determining that the zero sequence current signal is caused by the grounding of a bus of the power supply system when the first voltage signal and the second voltage signal meet preset conditions.
In an embodiment, when the first voltage signal and the second voltage signal meet a preset condition, determining that the zero sequence current signal is caused by the bus grounding of the power supply system includes: and when the time that the first voltage signal and the second voltage signal are positive at the same time is longer than a preset time, determining that the zero sequence current signal is caused by the grounding of the bus of the power supply system.
In an embodiment, the determining the cause of the zero sequence current signal further includes: and when the first voltage signal and the second voltage signal do not meet the preset conditions, determining that the zero sequence current signal is caused by transformer gap discharge of the power supply system.
In an embodiment, the method for suppressing relay protection malfunction of the power supply system further includes: and when the zero sequence current signal is caused by the transformer gap discharge of the power supply system, controlling the relay protection device to be not operated.
In one embodiment, the impedance relay comprises a directional relay; after the zero sequence current signal is detected in real time, the method for suppressing relay protection misoperation of the power supply system further comprises the following steps: determining the direction of the zero sequence current signal through the directional relay; and determining the cause of the zero sequence current signal when the direction of the zero sequence current signal is from a bus of the power supply system to the ground surface.
According to another aspect of the present application, there is provided a device for suppressing malfunction of relay protection of a power supply system, including: the signal detection module is used for detecting zero sequence current signals in real time; the reason determining module is used for determining the reason for triggering the zero sequence current signal when the zero sequence current signal is detected; and the execution module is used for controlling the relay protection device to execute tripping action when the zero sequence current signal is caused by the grounding of the bus of the power supply system.
According to another aspect of the present application, there is provided a computer readable storage medium storing a computer program for executing any one of the above-described power supply system relay protection malfunction suppression methods.
According to another aspect of the present application, there is provided an electronic device including: a processor; a memory for storing the processor-executable instructions; the processor is configured to execute the method for suppressing relay protection malfunction of the power supply system.
According to the suppression method, the device, the medium and the equipment for relay protection misoperation of the power supply system, the zero sequence current signal is detected in real time, when the zero sequence current signal is detected, the triggering reason of the zero sequence current signal is determined, and when the triggering reason of the zero sequence current signal is the grounding of a bus of the power supply system, the relay protection device is controlled to execute tripping action; when the zero sequence current signal is detected, the triggering reason of the zero sequence current signal needs to be further determined, and the relay protection device is controlled to execute tripping action only when the triggering reason of the zero sequence current signal is the bus grounding of the power supply system, so that tripping action caused by zero sequence current due to gap discharge of a transformer can be avoided, namely, misoperation of the relay protection of the power supply system is avoided, and the power supply reliability and the power utilization effect of the power supply system are improved.
Drawings
The above and other objects, features and advantages of the present application will become more apparent by describing embodiments of the present application in more detail with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate the application and together with the embodiments of the application, and not constitute a limitation to the application. In the drawings, like reference numerals generally refer to like parts or steps.
Fig. 1 is a view of a scene or a system or circuit configuration to which the present application is applied.
Fig. 2 is a flowchart of a method for suppressing relay protection malfunction of a power supply system according to an exemplary embodiment of the present application.
Fig. 3 is a flow chart of a method for determining the cause of a zero sequence current signal according to an exemplary embodiment of the present application.
Fig. 4 is a schematic diagram for determining the cause of a zero sequence current signal according to an exemplary embodiment of the present application.
Fig. 5 is a flowchart of a method for suppressing relay protection malfunction of a power supply system according to another exemplary embodiment of the present application.
Fig. 6 is a flowchart of a method for suppressing relay protection malfunction of a power supply system according to another exemplary embodiment of the present application.
Fig. 7 is a schematic structural diagram of a device for suppressing relay protection malfunction of a power supply system according to an exemplary embodiment of the present application.
Fig. 8 is a schematic structural diagram of a device for suppressing relay protection malfunction of a power supply system according to another exemplary embodiment of the present application.
Fig. 9 is a block diagram of an electronic device according to an exemplary embodiment of the present application.
Detailed Description
Hereinafter, exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. It should be apparent that the described embodiments are only some embodiments of the present application and not all embodiments of the present application, and it should be understood that the present application is not limited by the example embodiments described herein.
Fig. 1 is a view of a scene or a system or circuit configuration to which the present application is applied. As shown in fig. 1, when a certain circuit (e.g., power source I) coincides with a permanent fault, the fast transient pulse group of electricity generated by fast switching on and off generates a higher overvoltage on the bus bar, resulting in the discharge of the high-voltage side gap of the transformer of the adjacent circuit (e.g., power source II). This gap discharge will change the zero sequence network structure, generating zero sequence current. Because the line is operated with sensitive three-section (L1, L2 and L3 as shown in the figure) zero-sequence current protection, when the zero-sequence current value is large (i.e. larger than the preset value of the zero-sequence current protection) and continuous, the zero-sequence current protection action of the adjacent line is performed, and the relay protection tripping causes the non-fault line (the line corresponding to the power supply II) to be cut off, so that the normal operation of the system is affected.
In order to solve the problems, the application provides a method, a device, a medium and equipment for inhibiting relay protection misoperation of a power supply system, which are used for detecting zero sequence current signals in real time, determining the cause of the zero sequence current signals when the zero sequence current signals are detected, and controlling a relay protection device to execute tripping action when the cause of the zero sequence current signals is the grounding of a bus of the power supply system; when the zero sequence current signal is detected, the triggering reason of the zero sequence current signal needs to be further determined, and the relay protection device is controlled to execute tripping action only when the triggering reason of the zero sequence current signal is the bus grounding of the power supply system, so that tripping action caused by zero sequence current due to gap discharge of a transformer can be avoided, namely, misoperation of the relay protection of the power supply system is avoided, and the power supply reliability and the power utilization effect of the power supply system are improved.
Fig. 2 is a flowchart of a method for suppressing relay protection malfunction of a power supply system according to an exemplary embodiment of the present application. As shown in fig. 2, the method for suppressing relay protection malfunction of the power supply system includes:
step 210: and detecting the zero sequence current signal in real time.
The zero sequence current signal is detected in real time, so that the zero sequence current signal can be detected when the zero sequence current signal appears, and the safety hazard caused by the grounding of the bus is avoided.
In one embodiment, the specific implementation of step 210 may be: and detecting the zero sequence current signal in real time through an impedance relay arranged between a bus of the power supply system and the ground surface. The zero sequence current signal of the power supply system is obtained accurately in real time by detecting the zero sequence current signal in real time through an impedance relay arranged between a bus of the power supply system and the ground surface.
Step 220: and when the zero sequence current signal is detected, determining the triggering reason of the zero sequence current signal.
Since the zero sequence current signal is triggered by a plurality of reasons, and not necessarily the bus is grounded, when the zero sequence current signal is detected, the triggering reason of the zero sequence current signal needs to be further determined so as to avoid the overload protection of the relay protection device caused by the fact that the bus is not grounded.
Step 230: when the zero sequence current signal is caused by grounding of a bus of the power supply system, the relay protection device is controlled to execute tripping action.
When the zero sequence current signal is caused by grounding of a bus of the power supply system, potential safety hazards exist at the moment, so that the relay protection device is controlled to execute tripping action, and safety accidents are avoided.
According to the suppression method for relay protection misoperation of the power supply system, the zero sequence current signal is detected in real time, when the zero sequence current signal is detected, the triggering reason of the zero sequence current signal is determined, and when the triggering reason of the zero sequence current signal is the grounding of a bus of the power supply system, the relay protection device is controlled to execute tripping action; when the zero sequence current signal is detected, the triggering reason of the zero sequence current signal needs to be further determined, and the relay protection device is controlled to execute tripping action only when the triggering reason of the zero sequence current signal is the bus grounding of the power supply system, so that tripping action caused by zero sequence current due to gap discharge of a transformer can be avoided, namely, misoperation of the relay protection of the power supply system is avoided, and the power supply reliability and the power utilization effect of the power supply system are improved.
Fig. 3 is a flow chart of a method for determining the cause of a zero sequence current signal according to an exemplary embodiment of the present application. As shown in fig. 3, the step 220 may include:
step 221: the input voltage value and the current value of the impedance relay are obtained.
The impedance relay can be an integrated circuit type impedance relay, and the triggering reason of the zero sequence current signal is determined according to the input voltage value and the current value of the impedance relay obtained in real time.
Step 222: according to the voltage value and the current value, a first voltage signal corresponding to the voltage value and a second voltage signal corresponding to the current value are formed.
The specific principle structure is shown in fig. 4, after the input voltage value and the current value are obtained, the impedance relay forms a first voltage signal corresponding to the voltage value and a second voltage signal corresponding to the current value according to the input voltage value and the current value, and determines the triggering reason of the zero sequence current signal according to the first voltage signal and the second voltage signal.
Step 223: when the first voltage signal and the second voltage signal meet preset conditions, determining that the zero sequence current signal is caused by the grounding of a bus of the power supply system.
In one embodiment, the specific implementation of step 223 may be: when the time that the first voltage signal and the second voltage signal are positive at the same time is longer than the preset time, determining that the triggering cause of the zero sequence current signal is the bus grounding of the power supply system.
Specifically, the equation of motion of the impedance relay is:
taking outThe method can obtain the following steps:
i.e.
Wherein the method comprises the steps ofAnd->The voltage values input by the relays are respectively +.>And current value->The first voltage signal and the second voltage signal are formed. Comparing the two voltage signals, the preset condition is +.>And->Time when instantaneous values are positive>5ms。
Experimental tests show that when the zero sequence current is caused by overvoltage gap discharge when the circuit breaker is disconnected, the time that the relay collects voltage generation signals and is positive is not longer than 2.5ms, so that the distance protection starting condition is not met, and when the distance protection is not started, the zero sequence protection cannot reach the tripping condition, so that the relay protection device does not act.
In an embodiment, as shown in fig. 3, the step 220 may further include:
step 224: when the first voltage signal and the second voltage signal do not meet the preset conditions, the triggering factor of the zero sequence current signal is determined to be the transformer gap discharge of the power supply system.
When the first voltage signal and the second voltage signal do not meet the preset condition, namely the time that the first voltage signal and the second voltage signal are positive at the same time is smaller than or equal to the preset time, the triggering cause of the zero sequence current signal is determined to be the transformer gap discharge of the power supply system. That is, the reason for causing the zero sequence current signal at this time is not that the bus of the power supply system is grounded, and no protection action can be performed at this time, so as to avoid error protection action and improve the power supply reliability and the power utilization effect of the power supply system.
Fig. 5 is a flowchart of a method for suppressing relay protection malfunction of a power supply system according to another exemplary embodiment of the present application. As shown in fig. 5, the method for suppressing relay protection malfunction of the power supply system may further include:
step 240: when the zero sequence current signal is caused by the transformer gap discharge of the power supply system, the relay protection device is controlled to be not operated.
When the zero sequence current signal is caused not by the grounding of the bus of the power supply system but by the gap discharge of the transformer, the protection action can be omitted, so that the error protection action is avoided, and the power supply reliability and the power utilization effect of the power supply system are improved.
Fig. 6 is a flowchart of a method for suppressing relay protection malfunction of a power supply system according to another exemplary embodiment of the present application. The impedance relay includes a directional relay; as shown in fig. 6, after step 210, the method for suppressing relay protection malfunction of the power supply system may further include:
step 250: the direction of the zero sequence current signal is determined by the directional relay.
The directional relay is used to determine the direction of the zero sequence current signal to determine whether the zero sequence current is flowing from the bus to the surface, thereby determining the attribute of the zero sequence current signal.
Step 260: and when the direction of the zero sequence current signal is from the bus of the power supply system to the ground surface, determining the triggering reason of the zero sequence current signal.
When the direction of the zero sequence current signal is from the bus of the power supply system to the ground surface, namely, the current direction in the zero sequence current signal is from the bus to the ground surface, the situation that the bus is communicated with the ground surface and the bus current flows into the ground surface is described, and the reason for triggering the zero sequence current signal needs to be further determined at the moment so as to determine whether the relay protection device needs to be controlled to execute tripping action or not. After the directional distance protection is added as a starting element, aiming at a zero sequence path caused by neutral point overvoltage, the directional element does not act because no fault occurs, so that protection misoperation is avoided; when the protected line has a ground fault, the directional element is started, the zero sequence current protection can reliably act, and the power supply reliability of the power transmission line at the tail end of the distribution network is improved to a certain extent.
Fig. 7 is a schematic structural diagram of a device for suppressing relay protection malfunction of a power supply system according to an exemplary embodiment of the present application. As shown in fig. 7, the power supply system relay protection malfunction suppressing device 70 includes: a signal detection module 71, configured to detect a zero sequence current signal in real time; a cause determination module 72 for determining a cause of the zero sequence current signal when the zero sequence current signal is detected; and the execution module 73 is used for controlling the relay protection device to execute tripping action when the zero sequence current signal is caused by grounding of the bus of the power supply system.
According to the suppression device for relay protection misoperation of the power supply system, the signal detection module 71 detects zero-sequence current signals in real time, when the zero-sequence current signals are detected, the reason determination module 72 determines the reason for triggering the zero-sequence current signals, and when the reason for triggering the zero-sequence current signals is that a bus of the power supply system is grounded, the execution module 73 controls the relay protection device to execute tripping operation; when the zero sequence current signal is detected, the triggering reason of the zero sequence current signal needs to be further determined, and the relay protection device is controlled to execute tripping action only when the triggering reason of the zero sequence current signal is the bus grounding of the power supply system, so that tripping action caused by zero sequence current due to gap discharge of a transformer can be avoided, namely, misoperation of the relay protection of the power supply system is avoided, and the power supply reliability and the power utilization effect of the power supply system are improved.
In an embodiment, the signal detection module 71 may be further configured to: and detecting the zero sequence current signal in real time through an impedance relay arranged between a bus of the power supply system and the ground surface.
Fig. 8 is a schematic structural diagram of a device for suppressing relay protection malfunction of a power supply system according to another exemplary embodiment of the present application. As shown in fig. 8, the cause determination module 72 may include: an input value acquisition unit 721 for acquiring an input voltage value and a current value of the impedance relay; a voltage signal conversion unit 722 for forming a first voltage signal corresponding to the voltage value and a second voltage signal corresponding to the current value according to the voltage value and the current value; and an initiation cause acquiring unit 723 for determining that the initiation cause of the zero sequence current signal is a bus ground of the power supply system when the first voltage signal and the second voltage signal satisfy a preset condition.
In an embodiment, the cause acquisition unit 723 may be further configured to: when the time that the first voltage signal and the second voltage signal are positive at the same time is longer than the preset time, determining that the triggering cause of the zero sequence current signal is the bus grounding of the power supply system.
In an embodiment, the cause acquisition unit 723 may be further configured to: when the first voltage signal and the second voltage signal do not meet the preset conditions, the triggering factor of the zero sequence current signal is determined to be the transformer gap discharge of the power supply system.
In an embodiment, the execution module 73 may be further configured to: when the zero sequence current signal is caused by the transformer gap discharge of the power supply system, the relay protection device is controlled to be not operated.
In an embodiment, as shown in fig. 8, the suppression device 70 for relay protection malfunction of the power supply system may further include: a direction determination module 74 for determining the direction of the zero sequence current signal through the directional relay; the cause determination module 72 determines the cause of the zero sequence current signal when the direction of the zero sequence current signal is from the bus of the power supply system to the surface.
Next, an electronic device according to an embodiment of the present application is described with reference to fig. 9. The electronic device may comprise either or both of the first device and the second device, or a stand-alone device independent thereof, which may communicate with the first device and the second device to receive the acquired input signals therefrom.
Fig. 9 illustrates a block diagram of an electronic device according to an embodiment of the application.
As shown in fig. 9, the electronic device 10 includes one or more processors 11 and a memory 12.
The processor 11 may be a Central Processing Unit (CPU) or other form of processing unit having data processing and/or instruction execution capabilities, and may be other components in the electronic device 10 to perform the desired functions.
Memory 12 may include one or more computer program products that may include various forms of computer-readable storage media, such as volatile memory and/or non-volatile memory. The volatile memory may include, for example, random Access Memory (RAM) and/or cache memory (cache), and the like. The non-volatile memory may include, for example, read Only Memory (ROM), hard disk, flash memory, and the like. One or more computer program instructions may be stored on the computer readable storage medium that may be executed by the processor 11 to implement the method for suppressing relay protection malfunctions and/or other desired functions of the power supply system according to the embodiments of the present application described above. Various contents such as an input signal, a signal component, a noise component, and the like may also be stored in the computer-readable storage medium.
In one example, the electronic device 10 may further include: an input device 13 and an output device 14, which are interconnected by a bus system and/or other forms of connection mechanisms (not shown).
For example, when the electronic device is a first device or a second device, the input means 13 may be a camera for capturing an input signal of an image. When the electronic device is a stand-alone device, the input means 13 may be a communication network connector for receiving the acquired input signals from the first device and the second device.
In addition, the input device 13 may also include, for example, a keyboard, a mouse, and the like.
The output device 14 may output various information to the outside, including the determined distance information, direction information, and the like. The output device 14 may include, for example, a display, speakers, a printer, and a communication network and remote output devices connected thereto, etc.
Of course, only some of the components of the electronic device 10 that are relevant to the present application are shown in fig. 9 for simplicity, components such as buses, input/output interfaces, etc. are omitted. In addition, the electronic device 10 may include any other suitable components depending on the particular application.
Exemplary computer program product and computer readable storage Medium
In addition to the methods and apparatus described above, embodiments of the application may also be a computer program product comprising computer program instructions which, when executed by a processor, cause the processor to perform the steps in the method of suppressing relay protection malfunctions of a power supply system according to various embodiments of the application described in the "exemplary method" section of the specification.
The computer program product may write program code for performing operations of embodiments of the present application in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device, partly on a remote computing device, or entirely on the remote computing device or server.
Furthermore, embodiments of the present application may also be a computer-readable storage medium, having stored thereon computer program instructions, which when executed by a processor, cause the processor to perform the steps in the method for suppressing relay protection malfunctions of a power supply system according to the various embodiments of the present application described in the "exemplary method" section of the present specification.
The computer readable storage medium may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may include, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium would include the following: an electrical connection having one or more wires, a portable disk, a hard disk, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The basic principles of the present application have been described above in connection with specific embodiments, however, it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are merely examples and not intended to be limiting, and these advantages, benefits, effects, etc. are not to be considered as essential to the various embodiments of the present application. Furthermore, the specific details disclosed herein are for purposes of illustration and understanding only, and are not intended to be limiting, as the application is not necessarily limited to practice with the above described specific details.
The block diagrams of the devices, apparatuses, devices, systems referred to in the present application are only illustrative examples and are not intended to require or imply that the connections, arrangements, configurations must be made in the manner shown in the block diagrams. As will be appreciated by one of skill in the art, the devices, apparatuses, devices, systems may be connected, arranged, configured in any manner. Words such as "including," "comprising," "having," and the like are words of openness and mean "including but not limited to," and are used interchangeably therewith. The terms "or" and "as used herein refer to and are used interchangeably with the term" and/or "unless the context clearly indicates otherwise. The term "such as" as used herein refers to, and is used interchangeably with, the phrase "such as, but not limited to.
It is also noted that in the apparatus, devices and methods of the present application, the components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present application.
The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit embodiments of the application to the form disclosed herein. Although a number of example aspects and embodiments have been discussed above, a person of ordinary skill in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof.
Claims (6)
1. The method for suppressing the relay protection misoperation of the power supply system is characterized by comprising the following steps of:
detecting a zero sequence current signal in real time, wherein the zero sequence current signal is detected in real time through an impedance relay arranged between a bus of the power supply system and the ground surface;
when the zero sequence current signal is detected, determining an initiation cause of the zero sequence current signal, acquiring an input voltage value and a current value of the impedance relay, forming a first voltage signal corresponding to the voltage value and a second voltage signal corresponding to the current value according to the voltage value and the current value, determining that the initiation cause of the zero sequence current signal is grounded on a bus of the power supply system when the first voltage signal and the second voltage signal meet preset conditions, determining that the initiation cause of the zero sequence current signal is grounded on the bus of the power supply system when the time of the first voltage signal and the second voltage signal being positive is longer than preset time, and determining that the initiation cause of the zero sequence current signal is discharged on a transformer gap of the power supply system when the first voltage signal and the second voltage signal do not meet the preset conditions; and
and when the zero sequence current signal is caused by the grounding of the bus of the power supply system, controlling the relay protection device to execute tripping action.
2. The method for suppressing a relay protection malfunction of a power supply system according to claim 1, further comprising:
and when the zero sequence current signal is caused by the transformer gap discharge of the power supply system, controlling the relay protection device to be not operated.
3. The method for suppressing malfunction of a relay protection system according to claim 1, wherein the impedance relay comprises a directional relay; wherein after the real-time detection of the zero sequence current signal, the method further comprises:
determining the direction of the zero sequence current signal through the directional relay; and
and determining the triggering reason of the zero sequence current signal when the direction of the zero sequence current signal is from a bus of the power supply system to the ground surface.
4. The utility model provides a power supply system relay protection malfunction's suppression device which characterized in that includes:
the signal detection module is used for detecting zero-sequence current signals in real time and detecting the zero-sequence current signals in real time through an impedance relay arranged between a bus of the power supply system and the ground surface;
the reason determining module is used for determining the reason for triggering the zero sequence current signal when the zero sequence current signal is detected, acquiring an input voltage value and a current value of the impedance relay, forming a first voltage signal corresponding to the voltage value and a second voltage signal corresponding to the current value according to the voltage value and the current value, determining that the reason for triggering the zero sequence current signal is grounded by a bus of the power supply system when the first voltage signal and the second voltage signal meet preset conditions, determining that the reason for triggering the zero sequence current signal is grounded by the bus of the power supply system when the time for simultaneously being positive by the first voltage signal and the second voltage signal is longer than preset time, and determining that the reason for triggering the zero sequence current signal is discharged by a transformer gap of the power supply system when the first voltage signal and the second voltage signal do not meet the preset conditions; and
and the execution module is used for controlling the relay protection device to execute tripping action when the zero sequence current signal is caused by the grounding of the bus of the power supply system.
5. A computer-readable storage medium storing a computer program for executing the method of suppressing a relay protection malfunction of a power supply system according to any one of claims 1 to 3.
6. An electronic device, the electronic device comprising:
a processor;
a memory for storing the processor-executable instructions;
the processor is configured to execute the method for suppressing relay protection malfunction of the power supply system according to any one of claims 1 to 3.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103606909A (en) * | 2013-12-04 | 2014-02-26 | 国家电网公司 | Protecting system and method for power distribution network circuit |
| CN104577999A (en) * | 2015-01-08 | 2015-04-29 | 广西星宇智能电气有限公司 | Bus protection method and system based on transient-state zero-sequence current characteristic |
| CN107294071A (en) * | 2017-06-30 | 2017-10-24 | 南方电网科学研究院有限责任公司 | The guard method of power distribution network small resistance grounding system and device |
| CN209313424U (en) * | 2019-03-19 | 2019-08-27 | 马鞍山钢铁股份有限公司 | A kind of zero-sequence current protection circuit |
| CN112436492A (en) * | 2020-11-26 | 2021-03-02 | 广东电网有限责任公司佛山供电局 | Grounding protection method for small-resistance grounding system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3136526B8 (en) * | 2015-08-25 | 2022-12-21 | GE Energy Power Conversion Technology Ltd | Ground fault protection methods |
| CN111480275B (en) * | 2017-12-20 | 2022-12-30 | 日立能源瑞士股份公司 | Zero sequence current based differential protection for power transmission lines |
-
2021
- 2021-05-26 CN CN202110578440.5A patent/CN113300338B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103606909A (en) * | 2013-12-04 | 2014-02-26 | 国家电网公司 | Protecting system and method for power distribution network circuit |
| CN104577999A (en) * | 2015-01-08 | 2015-04-29 | 广西星宇智能电气有限公司 | Bus protection method and system based on transient-state zero-sequence current characteristic |
| CN107294071A (en) * | 2017-06-30 | 2017-10-24 | 南方电网科学研究院有限责任公司 | The guard method of power distribution network small resistance grounding system and device |
| CN209313424U (en) * | 2019-03-19 | 2019-08-27 | 马鞍山钢铁股份有限公司 | A kind of zero-sequence current protection circuit |
| CN112436492A (en) * | 2020-11-26 | 2021-03-02 | 广东电网有限责任公司佛山供电局 | Grounding protection method for small-resistance grounding system |
Non-Patent Citations (1)
| Title |
|---|
| 小电阻接地系统馈线自适应零序电流保护原理及装置实现;喻磊 等;电力自动化设备;第37卷(第11期);125-137 * |
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