Maintenance processing method, device and electronic equipment for relay protection device

Abstract

The present invention discloses a maintenance and processing method, device, and electronic device for a relay protection device. The method includes: in response to receiving a fault signal of an electric power system, obtaining the current operating state of the relay protection device and the characteristics of the protection area, wherein the protection area is the area protected by the relay protection device in the electric power system; determining the detection result of the relay protection device according to the signal type and current operating state of the fault signal, wherein the detection result characterizes whether the relay protection device has abnormal action and the type of abnormal action; determining the risk level of the relay protection device based on the detection result of the relay protection device and the characteristics of the protection area; and performing maintenance and processing on the relay protection device based on the control strategy corresponding to the risk level. The present invention solves the technical problem that the relay protection device has low fault identification accuracy and cannot perform maintenance and processing on the relay protection device in a timely and efficient manner when manually monitoring the relay protection device.

Description

Technical Field

[0001] The present invention relates to the field of power system and equipment operation and maintenance, and in particular to a maintenance processing method, device and electronic equipment for a relay protection device. Background Art

[0002] Relay protection equipment is an important part of ensuring the stable operation of the power system. In order to timely understand the operation status of relay protection equipment, the operation status of relay protection equipment is usually monitored manually by operation and maintenance personnel. However, due to the differences in the level of operation and maintenance personnel, there may be missed detections and false detections, which makes it impossible to accurately assess the risks of relay protection equipment. When there is a risk of failure in the relay protection equipment, the relay protection equipment cannot be repaired in a timely and efficient manner, which in turn affects the normal operation of the power system.

[0003] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0004] The embodiments of the present invention provide a method, device, and electronic equipment for repairing a relay protection device, so as to at least solve the technical problems that manual monitoring of a relay protection device may result in low fault identification accuracy and inability to repair the relay protection device in a timely and efficient manner.

[0005] According to one aspect of an embodiment of the present invention, a maintenance method for a relay protection device is provided, comprising: in response to receiving a fault signal of an electric power system, obtaining a current operating state of the relay protection device and characteristics of a protection area, wherein the protection area is an area protected by the relay protection device in the electric power system; determining a detection result of the relay protection device according to a signal type of the fault signal and a current operating state, wherein the detection result characterizes whether the relay protection device has an abnormal action and the type of the abnormal action; determining a risk level of the relay protection device based on the detection result of the relay protection device and the characteristics of the protection area; and performing maintenance processing on the relay protection device based on a control strategy corresponding to the risk level.

[0006] Furthermore, the detection result of the relay protection device is determined based on the signal type of the fault signal and the current operating state, including: determining the preset operating state of the relay protection device based on the signal type of the fault signal, wherein the preset operating state is the operating state that the relay protection device should have when responding to the fault signal; determining the detection result of the relay protection device based on the signal type of the fault signal, the preset operating state of the relay protection device and the current operating state of the relay protection device, wherein the detection result characterizes whether the relay protection device has abnormal action and the type of abnormal action.

[0007] Furthermore, the detection result of the relay protection device is determined according to the signal type of the fault signal, the preset operating state of the relay protection device and the current operating state of the relay protection device, including: comparing the preset operating state of the relay protection device and the current operating state of the relay protection device; if the preset operating state and the current operating state are consistent, determining that the detection result of the relay protection device is that there is no abnormal action; if the preset operating state and the current operating state are inconsistent, determining the detection result of the relay protection device based on the signal type of the fault signal.

[0008] Furthermore, the signal type of the fault signal includes: a fault signal within the protection area and a fault signal outside the protection area; the detection result of the relay protection device is determined based on the signal type of the fault signal, including: if the signal type of the fault signal is a fault signal within the protection area, then the detection result of the relay protection device is determined to be that there is abnormal action and the type of abnormal action is refusal to operate; if the signal type of the fault signal is a fault signal outside the protection area, then the detection result of the relay protection device is determined to be that there is abnormal action and the type of abnormal action is false action.

[0009] Furthermore, before determining the detection result of the relay protection device according to the signal type of the fault signal and the current operating status, the method also includes: obtaining the primary system diagram of the power system and the real-time position of the switch of the power system, wherein the primary system diagram is used to describe the interaction and coordination between the equipment in the power system; determining the signal type of the fault signal based on the primary system diagram of the power system and the real-time position of the switch of the power system.

[0010] Furthermore, the signal type of the fault signal is determined based on the primary system diagram of the power system and the real-time position of the switch of the power system, including: determining the protection area of ​​the relay protection device according to the primary system diagram; determining the occurrence location of the fault signal based on the fault signal and the real-time position of the switch; and determining the signal type of the fault signal according to whether the occurrence location of the fault signal is within the protection area.

[0011] Furthermore, the signal type of the fault signal is determined based on whether the occurrence location of the fault signal is within the protection area, including: if the occurrence location of the fault signal is within the protection area, determining the signal type of the fault signal is a fault signal within the protection area; if the occurrence location of the fault signal is outside the protection area, determining the signal type of the fault signal is a fault signal outside the protection area.

[0012] Furthermore, based on the detection results of the relay protection device and the characteristics of the protection area, the risk level of the relay protection device is determined, including: determining the type of the relay protection device, wherein the type of the relay protection device includes at least one of the following: a main transformer protection device, a busbar protection device, and a line protection device; determining the risk level of the relay protection device based on the type of the relay protection device, the detection results of the relay protection device, and the characteristics of the protection area.

[0013] Furthermore, the risk level of the relay protection device is determined based on the type of the relay protection device, the detection result of the relay protection device and the characteristics of the protection area, including: determining a conditional combination of the type of the relay protection device, the detection result of the relay protection device and the characteristics of the protection area; determining the risk level of the relay protection device based on the conditional combination and a preset mapping relationship, wherein the preset mapping relationship is used to represent the correspondence between the conditional combination of the type of the relay protection device, the detection result of the relay protection device and the characteristics of the protection area and the risk level of the relay protection device.

[0014] Furthermore, the relay protection device is maintained based on the control strategy corresponding to the risk level, including: if the risk level is a level one event, the relay protection device is immediately maintained, and the operating status of the relay protection device is re-monitored after the maintenance is completed; if the risk level is a level two event, the relay protection device is immediately maintained; if the risk level is a level three event, the control strategy is to continuously monitor the status of the relay protection device and maintain the relay protection device during non-critical periods.

[0015] Furthermore, the method further includes: in response to receiving a fault signal, determining whether the state of the power system is a maintenance state; in response to the state of the power system being the maintenance state, shielding the fault signal.

[0016] Furthermore, in response to receiving a fault signal, determining whether the state of the power system is in a maintenance state includes: determining whether the fault signal carries a maintenance identifier, wherein the maintenance identifier is added to the fault signal when the state of the power system is in a maintenance state; if the fault signal carries a maintenance identifier, determining that the state of the power system is in a maintenance state.

[0017] According to another aspect of an embodiment of the present invention, a maintenance processing device for a relay protection device is also provided, including: an acquisition module, used to obtain the current operating status of the relay protection device and the characteristics of the protection area in response to receiving a fault signal of the power system, wherein the protection area is the area protected by the relay protection device in the power system; a first determination module, used to determine the detection result of the relay protection device according to the signal type of the fault signal and the current operating status, wherein the detection result characterizes whether the relay protection device has abnormal action and the type of abnormal action; a second determination module, used to determine the risk level of the relay protection device based on the detection result of the relay protection device and the characteristics of the protection area; and a control module, used to perform maintenance processing on the relay protection device based on the control strategy corresponding to the risk level.

[0018] According to another aspect of an embodiment of the present invention, there is further provided an electronic device, comprising: a memory storing an executable program; and a processor for running the program, wherein the method in each embodiment of the present invention is executed when the program is running.

[0019] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided, including: the computer-readable storage medium includes a stored executable program, wherein when the executable program is running, the device where the storage medium is located is controlled to execute the methods in various embodiments of the present invention.

[0020] According to another aspect of an embodiment of the present invention, a computer program product is provided, including: a computer program, and when the computer program is executed by a processor, the method in each embodiment of the present invention is implemented.

[0021] In the embodiment of the present invention, an automatic detection method is adopted to determine the detection result of the relay protection device through the fault signal of the power system and the current operating state of the relay protection device, and then determine the risk level of the relay protection device based on the detection result of the relay protection device and the characteristics of the protection area of ​​the relay protection device, so as to perform maintenance on the relay protection device based on the control strategy corresponding to the risk level of the relay protection device. It is easy to notice that the relay protection device is automatically and real-time detected according to the signal type of the fault signal and the current operating state to detect whether there is an abnormal action and the type of abnormal action, so as to determine the risk level of the relay protection device based on the detection result and the characteristics of the protection area, and can be repaired and processed in a targeted manner, so as to achieve the purpose of automatically detecting and repairing the relay protection device, thereby achieving the technical effect of automatically detecting the fault risk of the relay protection device and being able to perform maintenance and processing in a targeted manner, thereby solving the technical problem that the relay protection device is low in fault identification accuracy and cannot be repaired and processed in a timely and efficient manner through manual monitoring of the relay protection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 is a flow chart of a maintenance processing method for a relay protection device according to an embodiment of the present invention;

[0024] Figure 2 is a flow chart of an optional method for determining a maintenance process of a relay protection device according to an embodiment of the present invention;

[0025] Figure 3 It is a structural schematic diagram of a maintenance processing device for a relay protection device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] According to an embodiment of the present invention, an embodiment of a maintenance processing method for a relay protection device is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0029] Figure 1 is a flow chart of a maintenance processing method for a relay protection device according to an embodiment of the present invention. Figure 1As shown, the method comprises the following steps:

[0030] Step S102, in response to receiving a fault signal of the power system, obtaining the current operating state of the relay protection device and the characteristics of the protection area, wherein the protection area is the area protected by the relay protection device in the power system.

[0031] The above-mentioned fault signal of the power system can be a signal used to characterize whether a power system fault occurs or not; the fault signal can be obtained by acquiring the fault recording waveform of the relay protection device through an intelligent recorder, that is, the fault recording waveform can be used as a fault signal, or the fault signal can be obtained by monitoring the state of the relay, and when the relay is in the open state, a fault signal is generated and sent.

[0032] The current operating state of the above-mentioned relay protection device can be represented by whether the relay protection device is tripped or not, or it can also be represented by the waveform of the relay protection device collected by the intelligent recorder. For example, the current operating state parameter value of the relay protection device is represented by "0" or "1". When the relay protection device is detected to be tripped, the current operating state parameter value of the relay protection device is "1", otherwise it is "0"; or, the operating state of the relay protection device is judged by identifying the characteristics of the waveform. The characteristics of the waveform may include one of the following: frequency, amplitude, phase, waveform shape. For example, when the frequency is greater than the preset frequency threshold, the current operating state parameter value of the relay protection device is "1", otherwise it is "0".

[0033] The characteristics of the protection area of ​​the above-mentioned relay protection device are used to evaluate the impact caused by the failure of the relay protection device. The characteristics of the protection area may include one of the following: voltage level, whether there is a problem of not satisfying the dual configuration, the above-mentioned voltage level can be set according to user needs, and this application does not limit this. For example, it can be divided into three levels, namely low voltage level, medium voltage level and high voltage level. Whether there is a problem of not satisfying the dual configuration is determined by judging whether a backup is required, including one of the following: there is a problem of not satisfying the dual configuration, there is no problem of not satisfying the dual configuration, and whether the dual configuration problem is not considered.

[0034] In an optional embodiment, when a fault signal is received, the current operating status of the relay protection device and the characteristics of the protection area can be read from the cloud server. The current operating status and the characteristics of the protection area are acquired in real time and sent to the cloud server for storage. Alternatively, the current operating status of the relay protection device and the characteristics of the protection area can be acquired from a monitoring system in the power system, or the current operating status of the relay protection device and the characteristics of the protection area can be determined manually.

[0035] Step S104, determining the detection result of the relay protection device according to the signal type of the fault signal and the current operating state, wherein the detection result indicates whether the relay protection device has abnormal action and the type of abnormal action.

[0036] The signal types of the above-mentioned fault signals can be divided into in-zone faults and out-of-zone faults. In-zone faults may be faults that occur within the protection area of ​​the relay protection device, and out-of-zone faults may be faults that occur outside the protection area of ​​the relay protection device. The detection result of the above-mentioned relay protection device may include one of the following: abnormal action of the relay protection device, no abnormal action of the relay protection device, and the above-mentioned abnormal action may include one of the following: refusal of the relay protection device to operate, and malfunction of the relay protection device. The above-mentioned malfunction refers to the erroneous triggering of the safety shutdown or protection mechanism in the event of a fault or abnormality, which may cause production interruption, equipment damage or reduced efficiency. The cause of the malfunction may be sensor failure, program error, or external interference. The above-mentioned refusal to operate refers to the failure to trigger the safety shutdown or protection mechanism as expected in the event of a fault or abnormality. This may cause equipment damage, production accidents, or even casualties. The cause of the refusal to operate may be sensor failure, control logic error, actuator damage, etc.

[0037] In an optional embodiment, a first preset operating state of the relay protection device is obtained according to the signal type of the fault signal. The first preset operating state can be represented by the tripping or non-tripping of the relay protection device, or by a waveform obtained by an intelligent recorder. For example, the first preset operating state parameter value of the relay protection device is represented by "0" or "1". When the relay protection device is detected to be tripped, the first preset operating state parameter value of the relay protection device is "1", otherwise it is "0"; or, the operating state of the relay protection device is judged by identifying the characteristics of the waveform. The characteristics of the waveform may include one of the following: frequency, amplitude, phase, and waveform shape. For example, when the frequency is greater than a preset frequency threshold, the first preset operating state parameter value of the relay protection device is "1", otherwise it is "0". Optionally, a first correspondence table between the signal type of the fault signal and the first preset operating state of the relay protection device is pre-configured in the cloud server, the signal type of the fault signal is obtained, and the first preset operating state corresponding to the signal type in the first correspondence table is read. If the current operating state of the relay protection device is consistent with the first preset operating state, it means that the detection result of the relay protection device is that there is no abnormal action. If the current operating state of the relay protection device is inconsistent with the first preset operating state, it means that the detection result of the relay protection device is that there is an abnormal action, and then continue to judge what type of abnormal action the detection result of the relay protection device is based on the signal type of the fault signal.

[0038] In another optional embodiment, the signal type and current operating status of the fault signal are input into a first classification model, and the output value of the first classification model is the detection result of the relay protection device. The first classification model can be one of the following: logistic regression, decision tree, random forest, support vector machine.

[0039] Step S106: determining the risk level of the relay protection device based on the detection result of the relay protection device and the characteristics of the protection area.

[0040] The detection result of the above-mentioned relay protection device may include one of the following: there is no abnormal action of the relay protection device, there is abnormal action of the relay protection device and the abnormal action type is refusal to act, and there is abnormal action of the relay protection device and the abnormal action type is misoperation. The risk level of the above-mentioned relay protection device can be set according to user needs, and this application does not limit this. For example, it can be divided into three levels, namely low risk level, medium risk level and high risk level.

[0041] In an optional embodiment, a mapping relationship table of the detection results of the relay protection device, the characteristics of the protection area and the risk level of the relay protection device may be preconfigured, and the risk level of the relay protection device may be determined according to the mapping relationship table.

[0042] For example, taking the three risk levels as an example, when the detection result of the relay protection device is abnormal action and the action type is refusal to act, and the voltage level of the relay protection device is a high voltage level and there is also a problem of not satisfying the dual configuration, then the relay protection device is a high risk level; when the detection result of the relay protection device is abnormal action and the action type is refusal to act, and the voltage level of the relay protection device is a medium voltage level and there is also a problem of not satisfying the dual configuration, then the relay protection device is a medium risk level; when the detection result of the relay protection device is abnormal action and the action type is refusal to act, and the voltage level of the relay protection device is a low voltage level and there is no problem of not satisfying the dual configuration, then the relay protection device is a low risk level.

[0043] In another optional embodiment, the detection results of the relay protection device and the characteristics of the protection area are input into a second classification model, and the output value of the second classification model is the risk level of the relay protection device. The second classification model can be one of the following: logistic regression, decision tree, random forest, support vector machine.

[0044] In another optional embodiment, a score can also be set for each parameter in the detection results of the relay protection device and the characteristics of the protection area, and a weight can be set according to the importance of each parameter. The sum of the weights of the various parameter values ​​is used as a standard for evaluating the risk level of the relay protection device. The larger the sum, the higher the risk level.

[0045] Step S108: Perform maintenance on the relay protection device based on the control strategy corresponding to the risk level.

[0046] In an optional embodiment, control strategies corresponding to each risk level can be pre-configured so that a response can be made immediately after the risk level of the relay protection device is determined. For example, taking the risk level including three levels as an example, the control strategy corresponding to the high risk level is to immediately perform maintenance on the relay protection device and re-monitor the operating status of the relay protection device after the maintenance is completed. The control strategy corresponding to the medium risk level is to immediately perform maintenance on the relay protection device. The control strategy corresponding to the low risk level is to continuously monitor the status of the relay protection device and perform maintenance on the relay protection device during non-critical periods.

[0047] In another optional embodiment, the risk level is input into a pre-established strategy model to obtain a control strategy for maintenance processing. The strategy optimization model can be a strategy model constructed based on the risk level and the control strategy, or it can be a pre-trained neural network model.

[0048] Through the above steps, an automatic detection method is adopted to determine the detection result of the relay protection device through the fault signal of the power system and the current operating state of the relay protection device, and then the risk level of the relay protection device is determined based on the detection result of the relay protection device and the characteristics of the protection area of ​​the relay protection device, so as to perform maintenance on the relay protection device based on the control strategy corresponding to the risk level of the relay protection device. It is easy to notice that the relay protection device is automatically and real-time detected according to the signal type of the fault signal and the current operating state to detect whether there is an abnormal action and the type of abnormal action, so as to determine the risk level of the relay protection device based on the detection result and the characteristics of the protection area, and can be repaired in a targeted manner, achieving the purpose of automatically detecting and repairing the relay protection device, thereby achieving the technical effect of automatically detecting the fault risk of the relay protection device and being able to perform maintenance in a targeted manner, thereby solving the technical problem that the relay protection device is low in fault identification accuracy and cannot be repaired in a timely and efficient manner through manual monitoring of the relay protection device.

[0049] Optionally, the detection result of the relay protection device is determined according to the signal type of the fault signal and the current operating state, including: determining the preset operating state of the relay protection device according to the signal type of the fault signal, wherein the preset operating state is the operating state that the relay protection device should have when responding to the fault signal; determining the detection result of the relay protection device according to the signal type of the fault signal, the preset operating state of the relay protection device and the current operating state of the relay protection device, wherein the detection result characterizes whether the relay protection device has abnormal action and the type of abnormal action.

[0050] The signal types of the above-mentioned fault signals can be divided into faults within the protection area of ​​the relay protection device and faults outside the protection area of ​​the relay protection device. The above-mentioned preset operating state can be represented by the tripping or non-tripping of the relay protection device, or by the waveform of the relay protection device collected by the intelligent recorder. The preset operating state can be represented by the tripping or non-tripping of the relay protection device, or by the waveform obtained by the intelligent recorder. For example, the preset operating state parameter value of the relay protection device is represented by "0" or "1". When the relay protection device is detected to be tripped, the preset operating state parameter value of the relay protection device is "1", otherwise it is "0"; or, the operating state of the relay protection device is judged by identifying the characteristics of the waveform. The characteristics of the waveform may include one of the following: frequency, amplitude, phase, waveform shape. For example, when the frequency is greater than the preset frequency threshold, the first preset operating state parameter value of the relay protection device is "1", otherwise it is "0".

[0051] In an optional embodiment, a correspondence table of the signal type of the fault signal and the preset operating state of the relay protection device is pre-configured in the cloud server. According to the signal type of the fault signal, the preset operating state corresponding to the signal type in the correspondence table is read. Alternatively, the signal type of the fault signal can be input according to the training classification model, and the model output value is the preset operating state of the relay protection device. Optionally, a comparison is made to determine whether the preset operating state is consistent with the current operating state. If the current operating state of the relay protection device is consistent with the preset operating state, it means that the detection result of the relay protection device is that there is no abnormal action. If the current operating state of the relay protection device is inconsistent with the preset operating state, it means that the detection result of the relay protection device is that there is an abnormal action, and then continue to determine what type of abnormal action the detection result of the relay protection device is based on the signal type of the fault signal.

[0052] In another optional embodiment, the signal type of the fault signal, the preset operating state and the current operating state of the relay protection device are input into a third classification model, and the output value of the third classification model is the detection result of the relay protection device. The third classification model can be one of the following: logistic regression, decision tree, random forest, support vector machine.

[0053] Optionally, the detection result of the relay protection device is determined according to the signal type of the fault signal, the preset operating state of the relay protection device and the current operating state of the relay protection device, including: comparing the preset operating state of the relay protection device and the current operating state of the relay protection device; if the preset operating state and the current operating state are consistent, determining that the detection result of the relay protection device is that there is no abnormal action; if the preset operating state and the current operating state are inconsistent, determining the detection result of the relay protection device based on the signal type of the fault signal.

[0054] The detection result of the above-mentioned relay protection device may include one of the following: abnormal action of the relay protection device, no abnormal action of the relay protection device, and the above-mentioned abnormal action may include the types of relay protection device refusing to act and relay protection device malfunctioning.

[0055] In an optional embodiment, by comparing the hash value of the preset operating state and the hash value of the current operating state, if the hash values ​​are consistent, it means that the current operating state is consistent with the preset operating state, that is, it clarifies the state that the relay protection device should be in when responding to a fault, that is, there is no abnormal action of the relay protection device; if the current operating state is inconsistent with the preset operating state, it means that the relay protection device has failed to take normal action to protect the power system in the face of a power fault, that is, there is abnormal action of the relay protection device.

[0056] Optionally, the signal type of the fault signal includes: a fault signal within the protection area and a fault signal outside the protection area; the detection result of the relay protection device is determined based on the signal type of the fault signal, including: if the signal type of the fault signal is a fault signal within the protection area, then the detection result of the relay protection device is determined to be that there is abnormal action and the type of abnormal action is refusal to operate; if the signal type of the fault signal is a fault signal outside the protection area, then the detection result of the relay protection device is determined to be that there is abnormal action and the type of abnormal action is false action.

[0057] In the power system, the relay protection device has a fixed protection range. When the fault occurs outside the protection range of the relay protection device, the relay protection device will not operate. However, if the relay protection device produces an abnormal operation, it means that the relay protection device is triggered by mistake, that is, the type of abnormal operation of the relay protection device is false operation. When the fault occurs within the protection range of the relay protection device, the relay protection device fails to protect the power system normally, which means that the relay protection device does not protect as expected, that is, the type of abnormal operation of the relay protection device is refusal to operate.

[0058] Through the above steps, the easily detectable fault signals, the operating status of the relay protection device and other parameters can be used to determine whether the relay protection device has abnormal action and the specific type of abnormal action, thereby improving the detection accuracy and efficiency and laying the foundation for the subsequent targeted maintenance of the relay protection device.

[0059] Optionally, before determining the detection result of the relay protection device according to the signal type of the fault signal and the current operating status, the method also includes: obtaining a primary system diagram of the power system and the real-time position of the switch of the power system, wherein the primary system diagram is used to describe the interaction and coordination between equipment in the power system; determining the signal type of the fault signal based on the primary system diagram of the power system and the real-time position of the switch of the power system.

[0060] The primary system diagram includes a relay protection device, which may include the area protected by the relay protection device and the equipment in the power system that can be protected by the relay protection device. The switch of the power system, that is, the isolating switch, is a device that can protect the power system and can connect or disconnect the circuit. When a fault occurs in the power system, the switch is disconnected in time to cut off the fault.

[0061] In an optional embodiment, a primary system diagram of the power system can be obtained from a cloud server, or a configuration file library of the power system can be searched to obtain a primary system diagram from the configuration file library. The real-time position of the switch of the power system can be obtained from the monitoring system of the power system, and the monitoring video of the monitoring system can be retrieved in real time to identify the real-time position of the switch from the monitoring video, or the operation and maintenance personnel can determine the real-time position of the switch of the power system on site and upload it.

[0062] In another optional embodiment, the primary system diagram of the power system and the real-time position of the switch of the power system can be input into a fourth classification model, and the output value of the third classification model is the signal type of the fault signal. The above-mentioned fourth classification model can be one of the following: logistic regression, decision tree, random forest, support vector machine, or, after manually judging the real-time position of the switch of the power system on the spot, the signal type of the fault signal can be judged according to the primary system diagram of the power system and the real-time position of the switch of the power system.

[0063] Optionally, the signal type of the fault signal is determined based on the primary system diagram of the power system and the real-time position of the switch of the power system, including: determining the protection area of ​​the relay protection device according to the primary system diagram; determining the occurrence location of the fault signal based on the fault signal and the real-time position of the switch; and determining the signal type of the fault signal according to whether the occurrence location of the fault signal is within the protection area.

[0064] Optionally, the signal type of the fault signal is determined based on whether the occurrence location of the fault signal is within the protection area, including: if the occurrence location of the fault signal is within the protection area, determining the signal type of the fault signal is a fault signal within the protection area; if the occurrence location of the fault signal is outside the protection area, determining the signal type of the fault signal is a fault signal outside the protection area.

[0065] Through the above steps, a fault signal is detected, that is, when a fault occurs, the protection area of ​​the relay protection device is determined according to the primary system diagram, and the real-time position of the fault signal is obtained according to the real-time position of the switch. It is judged whether the real-time position of the fault signal is within or outside the protection area of ​​the relay protection device, and the signal type of the fault signal is accurately determined, thereby improving the accuracy of the detection result of the relay protection device, and providing an accurate reference for determining the risk level of the relay protection device.

[0066] Optionally, based on the detection results of the relay protection device and the characteristics of the protection area, the risk level of the relay protection device is determined, including: determining the type of the relay protection device, wherein the type of the relay protection device includes at least one of the following: a main transformer protection device, a busbar protection device, and a line protection device; determining the risk level of the relay protection device based on the type of the relay protection device, the detection results of the relay protection device, and the characteristics of the protection area.

[0067] In the power system, multiple relay protection devices and different types of relay protection devices are often set up. According to the different functions of the relay protection device in the power system, the type of relay protection device can include at least one of the following: main transformer protection device, busbar protection device, and line protection device. In addition, the protection action of the relay protection device and the characteristics of the protection area, such as the voltage level and whether the duplication is satisfied, also determine the importance of the relay protection device. Therefore, the risk level of the relay protection device is evaluated by the type of relay protection device, the detection results of the relay protection device, and the characteristics of the protection area.

[0068] In an optional embodiment, the type of the relay protection device is read from a cloud server, or the type of the relay protection device is read from a configuration file of the relay protection device, or the location of the relay protection device is identified from a monitoring system of the power system, and the type of the relay protection device is determined based on the location of the relay protection device.

[0069] In another optional embodiment, due to different types of relay protection devices, the importance of maintenance when there is a risk is different. A mapping relationship table of the type of relay protection device, the conditional combination of the detection result of the relay protection device and the characteristics of the protection area and the risk level of the relay protection device can be pre-configured, and the risk level of the relay protection device corresponding to the conditional combination is determined according to the mapping relationship table.

[0070] For example, taking the three risk levels as an example, when the type of relay protection device is a main transformer protection device, the detection result of the relay protection device is abnormal action and the action type is refusal to act, and the voltage level of the relay protection device is a high voltage level and there is also a problem of not satisfying the dual configuration, then the relay protection device is a high risk level; when the type of the relay protection device is a busbar protection device, the detection result of the relay protection device is abnormal action and the action type is refusal to act, and the voltage level of the relay protection device is a medium voltage level and there is also a problem of not satisfying the dual configuration, then the relay protection device is a medium risk level; when the type of the relay protection device is a line protection device, the detection result of the relay protection device is abnormal action and the action type is refusal to act, and the voltage level of the relay protection device is a low voltage level and there is also a problem of not satisfying the dual configuration, then the relay protection device is a low risk level.

[0071] In another optional embodiment, the type of relay protection device, the detection results of the relay protection device and the characteristics of the protection area are input into a fifth classification model, and the output value of the fourth classification model is the risk level of the relay protection device. The above-mentioned fifth classification model can be one of the following: logistic regression, decision tree, random forest, support vector machine.

[0072] Optionally, the risk level of the relay protection device is determined based on the type of the relay protection device, the detection results of the relay protection device and the characteristics of the protection area, including: determining a conditional combination of the type of the relay protection device, the detection results of the relay protection device and the characteristics of the protection area; determining the risk level of the relay protection device based on the conditional combination and a preset mapping relationship, wherein the preset mapping relationship is used to represent the correspondence between the conditional combination of the type of the relay protection device, the detection results of the relay protection device and the characteristics of the protection area and the risk level of the relay protection device.

[0073] For example, taking the three risk levels as an example, when the type of relay protection device is a main transformer protection device, the detection result of the relay protection device is abnormal action and the action type is refusal to act, and the voltage level of the relay protection device is a high voltage level and there is also a problem of not satisfying the dual configuration, then the relay protection device is a high risk level; when the type of the relay protection device is a busbar protection device, the detection result of the relay protection device is abnormal action and the action type is refusal to act, and the voltage level of the relay protection device is a medium voltage level and there is also a problem of not satisfying the dual configuration, then the relay protection device is a medium risk level; when the type of the relay protection device is a line protection device, the detection result of the relay protection device is abnormal action and the action type is refusal to act, and the voltage level of the relay protection device is a low voltage level and there is also a problem of not satisfying the dual configuration, then the relay protection device is a low risk level.

[0074] Through the above steps, the types of relay protection devices are distinguished according to their roles in the power system. At the same time, the detection results of the relay protection devices and the characteristics of the protection areas of the relay protection devices are considered, and the risk levels of the relay protection devices are accurately assessed. This can improve the accuracy of monitoring the status of the relay protection devices so that an immediate response can be made when a fault occurs.

[0075] Optionally, the relay protection device is maintained based on a control strategy corresponding to the risk level, including: if the risk level is a level one event, the relay protection device is immediately maintained, and the operating status of the relay protection device is re-monitored after the maintenance is completed; if the risk level is a level two event, the relay protection device is immediately maintained; if the risk level is a level three event, the control strategy is to continuously monitor the status of the relay protection device and maintain the relay protection device during non-critical periods.

[0076] The above-mentioned first-level event may indicate that the relay protection device is in a serious state and requires immediate maintenance and continuous monitoring. The above-mentioned second-level event may indicate that the relay protection device is in an abnormal state and requires immediate maintenance. The above-mentioned third-level event may indicate that the relay protection device has not yet shown abnormality, but requires continuous attention, so continuous monitoring is sufficient. The above-mentioned non-critical time period can be set according to user needs, and this application does not limit this. For example, it can be idle time or non-working time of the power system.

[0077] In an optional embodiment, the relay protection device can be immediately repaired by sending maintenance information to a terminal held by the operation and maintenance personnel, indicating the risk level and maintenance processing method. The operation and maintenance personnel rush to the site to handle it and feedback the maintenance completion information after completing the maintenance.

[0078] Optionally, the method further includes: in response to receiving a fault signal, determining whether the state of the power system is a maintenance state; in response to the state of the power system being the maintenance state, shielding the fault signal.

[0079] In an optional embodiment, the operating state of the power system can be monitored in real time by the monitoring system of the power system to determine whether the power system is in a maintenance state, or the alarm system of the power system can be used to determine whether there is an alarm message, and if there is an alarm message, it is determined that the power system is in a maintenance state. If the power system is already in a maintenance state, there is no need to monitor the relay protection device, and the fault signal can be shielded to not trigger the automatic monitoring process of the relay protection device.

[0080] Optionally, in response to receiving a fault signal, determining whether the state of the power system is in a maintenance state includes: determining whether the fault signal carries a maintenance identifier, wherein the maintenance identifier is added to the fault signal when the state of the power system is in a maintenance state; if the fault signal carries a maintenance identifier, determining that the state of the power system is in a maintenance state.

[0081] In an optional embodiment, a data packet carried in the fault signal may be obtained to determine whether there is a maintenance mark in the data packet, or the fault signal may be decoded to determine whether the fault signal carries a maintenance mark. When the fault signal carries a maintenance mark, the state of the power system is determined to be a maintenance state, and the fault signal is further shielded.

[0082] Figure 2 is a flow chart of an optional method for determining a maintenance process of a relay protection device according to an embodiment of the present invention, such as Figure 2 As shown, the method comprises the following steps:

[0083] Step S22, determining whether the fault signal carries a maintenance mark according to the fault signal; if the fault signal carries a maintenance mark, executing step S221, otherwise executing step S23;

[0084] Step S221, determining that the state of the power system is a maintenance state, shielding the fault signal;

[0085] Step S24, obtaining the current operating state of the relay protection device and the characteristics of the protection area;

[0086] Step S26, determining the detection result of the relay protection device according to the signal type of the fault signal and the current operating state;

[0087] Step S28, determining the risk level of the relay protection device according to the detection result of the relay protection device and the characteristics of the protection area;

[0088] Step S30: performing maintenance processing on the relay protection device according to the control strategy corresponding to the risk level.

[0089] Before step S26, the method also includes: obtaining a primary system diagram of the power system and the real-time position of the switch of the power system; determining the protection area of ​​the relay protection device according to the primary system diagram; determining the occurrence location of the fault signal according to the fault signal and the real-time position of the switch; determining the signal type of the fault signal according to whether the occurrence location of the fault signal is within the protection area; if the occurrence location of the fault signal is within the protection area, determining the signal type of the fault signal to be a fault signal within the protection area; if the occurrence location of the fault signal is outside the protection area, determining the signal type of the fault signal to be a fault signal outside the protection area.

[0090] according to Figure 3 is a schematic diagram of the structure of a state evaluation device for a relay protection device according to an embodiment of the present invention. Figure 3 As shown, the device includes: a first acquisition module 32, which is used to obtain the current operating state of the relay protection device and the characteristics of the protection area in response to receiving a fault signal of the power system, wherein the protection area is the area protected by the relay protection device in the power system; a first determination module 34, which is used to determine the detection result of the relay protection device according to the signal type of the fault signal and the current operating state, wherein the detection result characterizes whether there is an abnormal action of the relay protection device and the type of abnormal action; a second determination module 36, which is used to determine the risk level of the relay protection device based on the detection result of the relay protection device and the characteristics of the protection area; and a control module 38, which is used to perform maintenance processing on the relay protection device based on the control strategy corresponding to the risk level.

[0091] Optionally, the first determination module 34 includes: a first determination unit, used to determine a preset operating state of the relay protection device according to the signal type of the fault signal, wherein the preset operating state is the operating state that the relay protection device should have when responding to the fault signal; a second determination unit, used to determine the detection result of the relay protection device according to the signal type of the fault signal, the preset operating state of the relay protection device and the current operating state of the relay protection device, wherein the detection result characterizes whether the relay protection device has abnormal action and the type of abnormal action.

[0092] Optionally, the first determination unit is also used to compare a preset operating state of the relay protection device with the current operating state of the relay protection device; if the preset operating state and the current operating state are consistent, the detection result of the relay protection device is determined to be that there is no abnormal action; if the preset operating state and the current operating state are inconsistent, the detection result of the relay protection device is determined based on the signal type of the fault signal.

[0093] Optionally, the signal type of the fault signal includes: a fault signal within the protection area and a fault signal outside the protection area; the first determination unit is also used to determine the detection result of the relay protection device based on the signal type of the fault signal. If the signal type of the fault signal is a fault signal within the protection area, the detection result of the relay protection device is determined to be that there is abnormal action and the type of abnormal action is refusal to operate; if the signal type of the fault signal is a fault signal outside the protection area, the detection result of the relay protection device is determined to be that there is abnormal action and the type of abnormal action is false action.

[0094] Optionally, the device also includes: a second acquisition module, used to obtain the primary system diagram of the power system and the real-time position of the switch of the power system, wherein the primary system diagram is used to describe the interaction and coordination between the equipment in the power system; a third determination module, used to determine the signal type of the fault signal based on the primary system diagram of the power system and the real-time position of the switch of the power system.

[0095] Optionally, the third determination module includes: a third determination unit, used to determine the protection area of ​​the relay protection device according to the primary system diagram; a fourth determination unit, used to determine the occurrence location of the fault signal based on the fault signal and the real-time position of the switch; and a fifth determination unit, used to determine the signal type of the fault signal according to whether the occurrence location of the fault signal is within the protection area.

[0096] Optionally, the fifth determination unit is also used to determine the signal type of the fault signal as a fault signal within the protection area if the occurrence location of the fault signal is within the protection area; if the occurrence location of the fault signal is outside the protection area, determine the signal type of the fault signal as a fault signal outside the protection area.

[0097] Optionally, the second determination module 36 includes: a sixth determination unit, used to determine the type of the relay protection device, wherein the type of the relay protection device includes at least one of the following: a main transformer protection device, a busbar protection device, and a line protection device; a seventh determination unit, used to determine the risk level of the relay protection device based on the type of the relay protection device, the detection result of the relay protection device, and the characteristics of the protection area;

[0098] Optionally, the seventh determination unit is also used to determine a conditional combination of the type of relay protection device, the detection result of the relay protection device, and the characteristics of the protection area; and determine the risk level of the relay protection device based on the conditional combination and a preset mapping relationship, wherein the preset mapping relationship is used to represent the correspondence between the conditional combination of the type of relay protection device, the detection result of the relay protection device, and the characteristics of the protection area and the risk level of the relay protection device.

[0099] Optionally, the control module 38 is also used to immediately perform maintenance on the relay protection device if the risk level is a level one event, and re-monitor the operating status of the relay protection device after the maintenance is completed; if the risk level is a level two event, the relay protection device is immediately maintained; if the risk level is a level three event, the control strategy is to continuously monitor the status of the relay protection device and perform maintenance on the relay protection device during non-critical periods.

[0100] Optionally, the device further includes: a fourth determination module, used to determine whether the state of the power system is a maintenance state in response to receiving a fault signal; and a shielding module, used to shield the fault signal in response to the state of the power system being a maintenance state.

[0101] Optionally, the fourth determination module is also used to determine whether the fault signal carries a maintenance identifier, wherein the maintenance identifier is added to the fault signal when the power system is in a maintenance state; if the fault signal carries a maintenance identifier, it is determined that the power system is in a maintenance state.

[0102] According to another aspect of an embodiment of the present invention, there is further provided an electronic device, comprising: a memory storing an executable program; and a processor for running the program, wherein the method in each embodiment of the present invention is executed when the program is running.

[0103] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided, including: the computer-readable storage medium includes a stored executable program, wherein when the executable program is running, the device where the storage medium is located is controlled to execute the methods in various embodiments of the present invention.

[0104] According to another aspect of an embodiment of the present invention, a computer program product is provided, including: a computer program, and when the computer program is executed by a processor, the method in each embodiment of the present invention is implemented.

[0105] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0106] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0107] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0108] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0109] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0110] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc. Various media that can store program codes.

[0111] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A maintenance method for a relay protection device, characterized in that: include: In response to receiving a fault signal of the power system, obtaining a current operating state of the relay protection device and a feature of a protection area, wherein the protection area is an area protected by the relay protection device in the power system; Determine a detection result of the relay protection device according to the signal type of the fault signal and the current operating state, wherein the detection result indicates whether the relay protection device has an abnormal action and the type of the abnormal action; Determining a risk level of the relay protection device based on a detection result of the relay protection device and a characteristic of the protection area; Performing maintenance on the relay protection device based on a control strategy corresponding to the risk level; Wherein, determining the detection result of the relay protection device according to the signal type of the fault signal and the current operating state includes: Determining a preset operating state of the relay protection device according to the signal type of the fault signal, wherein the preset operating state is the operating state that the relay protection device should have when responding to the fault signal; The detection result of the relay protection device is determined according to the signal type of the fault signal, the preset operating state of the relay protection device and the current operating state of the relay protection device, wherein the detection result indicates whether the relay protection device has abnormal action and the type of the abnormal action.

2. The method according to claim 1, characterized in that Determining a detection result of the relay protection device according to the signal type of the fault signal, the preset operating state of the relay protection device, and the current operating state of the relay protection device includes: comparing a preset operating state of the relay protection device with a current operating state of the relay protection device; If the preset operating state is consistent with the current operating state, determining that the detection result of the relay protection device is that the abnormal action does not exist; If the preset operating state is inconsistent with the current operating state, a detection result of the relay protection device is determined based on the signal type of the fault signal.

3. The method according to claim 2, characterized in that The signal type of the fault signal includes: the fault signal within the protection area and the fault signal outside the protection area; determining the detection result of the relay protection device based on the signal type of the fault signal includes: If the signal type of the fault signal is the fault signal within the protection area, determining that the detection result of the relay protection device is that the abnormal action exists and the type of the abnormal action is refusal to act; If the signal type of the fault signal is the fault signal outside the protection area, it is determined that the detection result of the relay protection device is that the abnormal action exists and the type of the abnormal action is malfunction.

4. The method according to claim 1, characterized in that: Before determining the detection result of the relay protection device according to the signal type of the fault signal and the current operating state, the method further includes: Obtaining a primary system diagram of the power system and a real-time position of a switch of the power system, wherein the primary system diagram is used to describe the interaction and coordination between devices in the power system; The signal type of the fault signal is determined based on the primary system diagram of the power system and the real-time position of the switch of the power system.

5. The method according to claim 4, characterized in that Determining the signal type of the fault signal based on the primary system diagram of the power system and the real-time position of the switch of the power system includes: Determining the protection area of ​​the relay protection device according to the primary system diagram; Determine the occurrence position of the fault signal based on the fault signal and the real-time position of the switch; The signal type of the fault signal is determined according to whether the occurrence position of the fault signal is within the protection area.

6. The method according to claim 5, characterized in that Determining the signal type of the fault signal according to whether the occurrence location of the fault signal is within the protection area includes: If the occurrence location of the fault signal is within the protection area, determining the signal type of the fault signal to be the fault signal within the protection area; If the occurrence position of the fault signal is outside the protection area, it is determined that the signal type of the fault signal is the fault signal outside the protection area.

7. The method according to claim 1, characterized in that Determining the risk level of the relay protection device based on the detection result of the relay protection device and the characteristics of the protection area includes: Determine the type of the relay protection device, wherein the type of the relay protection device includes at least one of the following: a main transformer protection device, a busbar protection device, and a line protection device; The risk level of the relay protection device is determined based on the type of the relay protection device, the detection result of the relay protection device and the characteristics of the protection area.

8. The method according to claim 7, characterized in that Determining the risk level of the relay protection device based on the type of the relay protection device, the detection result of the relay protection device and the characteristics of the protection area includes: Determine a conditional combination of the type of the relay protection device, the detection result of the relay protection device, and the characteristics of the protection area; The risk level of the relay protection device is determined based on the combination of conditions and a preset mapping relationship, wherein the preset mapping relationship is used to represent the correspondence between the combination of conditions including the type of the relay protection device, the detection result of the relay protection device and the characteristics of the protection area and the risk level of the relay protection device.

9. The method according to any one of claims 1 to 8, characterized in that The method further comprises: In response to receiving the fault signal, determining whether the power system is in a maintenance state; In response to the power system being in a maintenance state, shielding the fault signal.

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