A power system relay protection method, device, storage medium and system

Abstract

The application discloses a power system relay protection method, device, storage medium and system, through increment maintenance equipment fault model, the obtained equipment fault model is associated with corresponding protection setting value, the sensitivity corresponding to each protection setting value is calculated to check and determine the selected sensitivity, and the protection equipment corresponding to the selected sensitivity is managed for relay protection, the power system relay protection method, device, storage medium and system improve the efficiency and accuracy of power grid equipment online checking in relay protection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power system relay protection, and in particular to a power system relay protection method, device, computer readable storage medium and system. BACKGROUND

[0002] In recent years, the scale of power system is expanding, and the operation mode of power grid is becoming more and more complex, which poses new challenges to the relay protection as the first line of defense of the power system. In view of the constraints of the traditional setting calculation using offline size method for setting calculation, the online checking of relay protection setting value makes up for the deficiency that offline data cannot reflect the current operation mode of power grid.

[0003] In the prior art, the general protection setting value online checking calculation process is as follows: reading the EMS to read the power grid model parameters (including device name, voltage level, impedance parameter, topology connection point, etc.) and the power grid state estimation result data (containing real-time operation data and power flow calculation parameters of the whole network), calculating the fault point and its periphery electrical quantity under each simulation state according to the real-time mode; checking whether the protection setting value sensitivity and selectivity at the protection device installation meet the requirements according to the above electrical quantity.

[0004] However, the prior art still has the following defects: each time the protection setting value is checked according to the new real-time data, all the fault models of primary devices are re-generated, that is, the fault points, fault types and fault simulation data related to each primary device (the above data is defined as fault model) are re-generated, and the corresponding protection setting value belonging to the primary device is also re-associated. For large power grids, there are numerous devices, and it takes a long time to re-generate each time, and since the data is distributed in multiple nodes, a large number of data operations in a short time can easily lead to synchronization anomalies of the data.

[0005] Therefore, there is a need for a power system relay protection method, device, computer readable storage medium and system to overcome the above-mentioned defects in the prior art. SUMMARY

[0006] The embodiments of the present application provide a power system relay protection method, device, computer readable storage medium and system, thereby improving the efficiency and accuracy of online checking of power grid devices in relay protection.

[0007] An embodiment of the present application provides a power system relay protection method, which comprises: acquiring a power grid data set from an energy management system in real time and acquiring a protection information data set; the power grid data set comprises a power grid model and power grid state data; the power grid model comprises power grid device information data sets, each of which corresponds to a power grid device; the protection information data set comprises protected devices, protection devices and corresponding protection setting values; according to the power grid device information data sets, the power grid state data and the power grid model, a device fault model is acquired, and the protection setting values are associated with the device fault model according to the device fault model and the protection information data set; according to the device fault model, the power grid data set and the protection setting values, the sensitivity of the protection device is calculated for protection setting value checking, and power system relay protection management is performed according to the checking result and the sensitivity.

[0008] As an improvement of the above scheme, according to the power grid device information data sets, the power grid state data and the power grid model, the device fault model is acquired, specifically comprising: acquiring historical power grid device information data sets; according to the historical power grid device information data sets and the power grid device information data sets, it is judged whether the corresponding power grid device is a new device; according to the judgment result, the power grid state data and the power grid model, the device fault model is acquired.

[0009] As an improvement of the above scheme, according to the judgment result, the power grid state data and the power grid model, the device fault model is acquired, specifically comprising: when it is judged that the corresponding power grid device is a new device, the device fault model is generated according to the power grid device information data sets and the power grid state data; when it is judged that the corresponding power grid device is not a new device, the power grid model is taken as the device fault model.

[0010] As an improvement of the above scheme, according to the device fault model, the power grid data set and the protection setting value, the sensitivity of the protection device is calculated for protection setting value checking, specifically comprising: the ratio of a first electrical quantity value to the protection setting value is calculated, and the ratio is taken as the sensitivity of the protection device; the first electrical quantity value is the electrical quantity value at the installation position of the protected device and the protection device; when the sensitivity is greater than 1, the protection setting value checking is passed; otherwise, the protection setting value checking is not passed.

[0011] As an improvement of the above scheme, the relay protection method further comprises: according to the historical power grid device information data sets and the power grid device information data sets, it is judged whether the corresponding power grid device is an invalid device; according to the judgment result and the power grid model, the historical power grid device information data sets are updated.

[0012] As an improvement of the above scheme, the power grid state data comprises a device operation state.

[0013] As an improvement of the above scheme, the power system relay protection management is performed according to the checking result and the sensitivity, and specifically comprises: screening a first protection device with a passing checking result from all protection devices, and obtaining a first sensitivity corresponding to the first protection device; selecting a second protection device with the highest first sensitivity from all first protection devices, and performing the power system relay protection management through the second protection device.

[0014] Another embodiment of the present application correspondingly provides a power system relay protection device, which comprises a data acquisition unit, a model association unit and a protection checking unit, wherein the data acquisition unit is configured to acquire a power grid data group and a protection information data group from a power management system in real time; the power grid data group comprises a power grid model and power grid state data; the power grid model comprises power grid device information data groups, each of which corresponds to a power grid device; the protection information data group comprises protected devices, protection devices and corresponding protection setting values; the model association unit is configured to acquire a device fault model according to the power grid device information data groups, the power grid state data and the power grid model, and associate the protection setting values with the device fault model according to the device fault model and the protection information data group; and the protection checking unit is configured to calculate the sensitivity of the protection device for protection setting value checking according to the device fault model, the power grid data group and the protection setting value, and perform power system relay protection management according to the checking result and the sensitivity.

[0015] As an improvement of the above scheme, the model association unit is further configured to: acquire a historical power grid device information data group; determine whether the corresponding power grid device is a new device according to the historical power grid device information data group and the power grid device information data group; and acquire the device fault model according to the determination result, the power grid state data and the power grid model.

[0016] As an improvement of the above scheme, the model association unit is further configured to: when it is determined that the corresponding power grid device is a new device, generate a device fault model according to the power grid device information data group and the power grid state data; and when it is determined that the corresponding power grid device is not a new device, use the power grid model as the device fault model.

[0017] As an improvement of the above scheme, the checking protection unit is further configured to: calculate a ratio of the first electrical quantity value to the protection setting value, and take the ratio as a sensitivity of the protection device; the first electrical quantity value is an electrical quantity value at the installation position of the protected device and the protection device; when the sensitivity is greater than 1, the protection setting value checking passes; otherwise, the protection setting value checking fails.

[0018] As an improvement of the above scheme, the relay protection device further comprises a device information updating unit, configured to: determine whether a corresponding power grid device is an invalid device according to the historical power grid device information data set and the power grid device information data set; and update the historical power grid device information data set according to the determination result and the power grid model.

[0019] As an improvement of the above scheme, the checking protection unit is further configured to: select a first protection device with a passing checking result from all protection devices, and obtain a first sensitivity corresponding to the first protection device; select a second protection device with the highest first sensitivity from all first protection devices, and perform relay protection management of the power system through the second protection device.

[0020] Another embodiment of the present application provides a computer readable storage medium, which comprises a stored computer program, wherein the computer readable storage medium controls a device where the computer readable storage medium is located to perform the power system relay protection method as described above when the computer program runs.

[0021] Another embodiment of the present application provides a power system relay protection system, which comprises a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and the processor implements the power system relay protection method as described above when the computer program runs.

[0022] Compared with the prior art, the technical scheme has the following beneficial effects:

[0023] The present application provides a power system relay protection method, device, computer readable storage medium and system, which associates the obtained device fault model with the corresponding protection setting value by incrementally maintaining the device fault model, calculates the sensitivity corresponding to each protection setting value to check and determine the selected sensitivity, and performs relay protection management on the protection device corresponding to the selected sensitivity, thereby improving the efficiency and accuracy of online checking of power grid devices in relay protection. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1is a flowchart of a power system relay protection method provided by an embodiment of the present application.

[0025] Figure 2 is a structural diagram of a power system relay protection device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application. Embodiment one

[0028] The embodiment of the present application first describes a power system relay protection method. Figure 1 is a flowchart of a power system relay protection method provided by an embodiment of the present application.

[0029] As shown in Figure 1 , the relay protection method comprises:

[0030] S1: Real-time acquisition of a power grid data set from an energy management system, and acquisition of a protection information data set.

[0031] In order to realize the checking real-time and further improve the stability of the relay protection, the embodiment of the present application first reads the power grid model parameters (described as “power grid model” in this paper) and the power grid state estimation result data (described as “power grid state data” in this paper) from the EMS in real time; on this basis, in order to be able to associate the protected device with the power grid model subsequently, it is also necessary to acquire the protection device related information (including the protected device, the protection device and the corresponding protection setting value) from the setting calculation software or the protection information system. The power grid model includes but is not limited to device name, voltage level, impedance parameter, topology point, etc., and the power grid state data includes but is not limited to real-time operation data of the whole network, power flow calculation parameter and device operation state.

[0032] The power grid data set comprises the power grid model and the power grid state data; the power grid model comprises a power grid device information data set, and each power grid device information data set corresponds to a power grid device; the protection information data set comprises the protected device, the protection device and the corresponding protection setting value.

[0033] S2: According to the power grid device information data set, the power grid state data and the power grid model, a device fault model is acquired, and according to the device fault model and the protection information data set, the protection setting value is associated with the device fault model.

[0034] After the real-time data is acquired, the device fault model needs to be updated by traversing all the network devices first. If it is found that the current device is a newly added device (there is no data associated with the device in the data acquired in step S1), a device fault model is generated (the device fault model records the fault description, fault type, device type, fault element name, distance from the fault point to the device head, device voltage level, fault start time, fault end time, and device operation state); otherwise, the acquired power grid model associated with the device is directly used. Each fault model in the device fault model contains the name description of the primary device, the fault type, the fault start time, the fault end time information, and the device operation state information, and the device fault model is added to the original fault model data set.

[0035] In one embodiment, the device fault model is acquired according to the power grid device information data set, the power grid state data, and the power grid model, specifically including: acquiring a historical power grid device information data set; determining whether the corresponding power grid device is a newly added device according to the historical power grid device information data set and the power grid device information data set; and acquiring the device fault model according to the determination result, the power grid state data, and the power grid model.

[0036] In one embodiment, the device fault model is acquired according to the determination result, the power grid state data, and the power grid model, specifically including: when it is determined that the corresponding power grid device is a newly added device, generating a device fault model according to the power grid device information data set and the power grid state data; and when it is determined that the corresponding power grid device is not a newly added device, using the power grid model as the device fault model.

[0037] Due to the complex structure of the power grid, various protection devices may exist in multiple fault scenarios, and therefore, after the device fault model is acquired, the device fault model needs to be associated with the protection setting value to ensure the accuracy of the results in various fault scenarios. That is, the protection setting value needs to be associated with the device fault model according to the consistency of the name of the protected device and the fault element in the device fault model.

[0038] S3: According to the device fault model, the power grid data set, and the protection setting value, the sensitivity of the protection device is calculated to perform protection setting value checking, and the power system relay protection management is performed according to the checking result and the sensitivity.

[0039] After the device fault model is associated, the sensitivity of each protection setting value of the protection device can be calculated, and the protection device in the running state is simulated and calculated. The protection sensitivity index reflects whether the protection device can reliably act when the internal fault of the line, transformer, bus and other elements under the current system mode. The calculation method of the sensitivity is that the protection device increases the amount of fault, and the sensitivity is the ratio of the electrical value of the protection device installation under the fault condition to the protection setting value. If the sensitivity is less than 1, it means that the protection cannot act under the fault condition.

[0040] In one embodiment, according to the device fault model, the power grid data set and the protection setting value, the sensitivity of the protection device is calculated for protection setting value checking, specifically including: calculating the ratio of the first electrical value to the protection setting value, and taking the ratio as the sensitivity of the protection device; the first electrical value is the electrical value of the protected device and the protection device installation; when the sensitivity is greater than 1, the protection setting value checking is passed; otherwise, the protection setting value checking is not passed.

[0041] In one embodiment, according to the checking result and the sensitivity, the power system relay protection management is performed, specifically including: selecting a first protection device with a passed checking result from all protection devices, and obtaining a first sensitivity corresponding to the first protection device; selecting a second protection device with the highest first sensitivity from all first protection devices, and performing relay protection management of the power system through the second protection device.

[0042] In order to avoid redundancy of calculation and storage and improve the efficiency of protection checking, in one embodiment, the relay protection method further includes: determining whether the corresponding power grid device is an invalid device according to the historical power grid device information data set and the power grid device information data set; and updating the historical power grid device information data set according to the determination result and the power grid model.

[0043] In the above process, the device fault model is incrementally maintained, and only the change amount of the device is maintained each time, without the need to maintain all one-time device fault models each time; the device commissioning information can not be limited to a certain power grid mode, and can store the device commissioning state under multiple power grid operating modes at the same time; the protection setting value can be multiple sets of setting values, and whether the set of setting values is in operation, that is, whether it needs to be checked, is usually associated with the device commissioning information; the power grid state data can also be saved as historical data, that is, the protection setting value can be checked using historical data to reproduce the fault scenario. And the device state of the device that has been put into operation can be modified to be stopped on the basis of the original data, and the protection setting value under a specific mode is checked.

[0044] The embodiment of the present application describes a power system relay protection method, which obtains a device fault model, associates the obtained device fault model with corresponding protection setting value, calculates the sensitivity corresponding to each protection setting value to check and determine the selected sensitivity, and performs relay protection management on the protection device corresponding to the selected sensitivity, thereby improving the efficiency and accuracy of online checking of power grid devices in relay protection. Specific embodiment two

[0046] In addition to the above method, the embodiment of the present application also discloses a power system relay protection device. Figure 2 FIG. 1 is a structural schematic diagram of a power system relay protection device provided by an embodiment of the present application.

[0047] As shown in FIG. 1, the relay protection device includes a data acquisition unit 11, a model association unit 12, and a check protection unit 13. Figure 2

[0048] The data acquisition unit 11 is configured to acquire a power grid data set from a power management system in real time and acquire a protection information data set. The power grid data set includes a power grid model and power grid state data; the power grid model includes a power grid device information data set, each power grid device information data set corresponding to a power grid device; and the protection information data set includes a protected device, a protection device, and corresponding protection setting value.

[0049] The model association unit 12 is configured to acquire a device fault model according to the power grid device information data set, the power grid state data, and the power grid model, and associate the protection setting value with the device fault model according to the device fault model and the protection information data set.

[0050] In one embodiment, the model association unit 12 is further configured to acquire a historical power grid device information data set, determine whether the corresponding power grid device is a newly added device according to the historical power grid device information data set and the power grid device information data set, and acquire a device fault model according to the determination result, the power grid state data, and the power grid model.

[0051] In one embodiment, the model association unit 12 is further configured to generate a device fault model according to the power grid device information data set and the power grid state data when it is determined that the corresponding power grid device is a newly added device, and use the power grid model as the device fault model when it is determined that the corresponding power grid device is not a newly added device.

[0052] The check protection unit 13 is configured to calculate the sensitivity of the protection device according to the device fault model, the power grid data set, and the protection setting value to perform protection setting value checking, and perform power system relay protection management according to the checking result and the sensitivity.​

[0053] In one embodiment, the protection checking unit 13 is further configured to: calculate a ratio of a first electrical quantity value and the protection setting value, and take the ratio as a sensitivity of the protection device; the first electrical quantity value is an electrical quantity value at the installation position of the protected device and the protection device; when the sensitivity is greater than 1, the protection setting value checking passes; otherwise, the protection setting value checking fails.

[0054] In one embodiment, the protection checking unit 13 is further configured to: select a first protection device with a passing result from all protection devices, and obtain a first sensitivity corresponding to the first protection device; select a second protection device with the highest first sensitivity from all first protection devices, and perform relay protection management of the power system through the second protection device.

[0055] In one embodiment, the relay protection device further comprises a device information updating unit, configured to: determine whether a corresponding power grid device is an invalid device according to the historical power grid device information data set and the power grid device information data set; and update the historical power grid device information data set according to the determination result and the power grid model.

[0056] The units integrated in the relay protection device, if realized in the form of software function units and sold or used as independent products, can be stored in a computer readable storage medium. Based on this understanding, all or part of the processes in the above-mentioned embodiment methods can also be completed by a computer program instructing related hardware, and the computer program can be stored in a computer readable storage medium. When the processor executes the computer program, the steps of each method embodiment can be realized. Another embodiment of the present application provides a computer readable storage medium, which includes a stored computer program, wherein the computer program controls the device where the computer readable storage medium is located to perform the power system relay protection method as described above when the computer program is running.

[0057] The computer program includes computer program code, which can be in the form of source code, object code, executable code, or some intermediate form. The computer-readable medium can include any entity or device capable of carrying the computer program code, a recording medium, a USB (Universal Serial Bus) flash disk, a mobile hard disk, a magnetic disk, an optical disk, a computer memory, a ROM (Read-Only Memory), a RAM (Random Access Memory), an electrical carrier signal, a telecommunications signal, and a software distribution medium, and the like. It should be noted that the computer-readable medium contains content that can be appropriately added or deleted according to requirements of legislation and patent practices in a jurisdiction, for example, in some jurisdictions, according to legislation and patent practices, the computer-readable medium does not include electrical carrier signals and telecommunications signals.

[0058] It should be noted that the apparatus embodiments described above are merely illustrative, and the units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or distributed on multiple network units. Part or all of the modules can be selected to achieve the purpose of the embodiment according to actual needs. In addition, the connection relationship between the units in the apparatus embodiments provided by the present application indicates that there is a communication connection between them, which can be implemented as one or more communication buses or signal lines. Those skilled in the art can understand and implement it without creative labor.

[0059] The embodiment of the application describes a power system relay protection device and a computer readable storage medium, by incrementally maintaining the equipment fault model, associating the obtained equipment fault model with the corresponding protection setting value, calculating the sensitivity corresponding to each protection setting value to check and determine the selected sensitivity, and performing relay protection management on the protection equipment corresponding to the selected sensitivity, the power system relay protection device and the computer readable storage medium improve the efficiency and accuracy of online checking of power grid equipment in relay protection. Specific embodiment three

[0061] In addition to the above method and device, the embodiment of the application also describes a power system relay protection system.

[0062] The relay protection system includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and the processor implements the power system relay protection method as described above when executing the computer program.

[0063] The processor can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor and the like, which is the control center of the device and connects all parts of the device through various interfaces and lines.

[0064] The memory can be used to store the computer programs and / or modules, and the processor realizes various functions of the device by running or executing the computer programs and / or modules stored in the memory, and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application program required by a function (such as a sound playing function, an image playing function, etc.), etc.; and the data storage area can store data created according to the use of the mobile phone (such as audio data, a phone book, etc.), etc. In addition, the memory can include a high-speed random access memory, and can also include a nonvolatile memory, for example, a hard disk, a memory, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, at least one disk storage device, a flash memory device, or other volatile solid-state memory devices.

[0065] The embodiment of the present application describes a power system relay protection system, by incrementally maintaining the equipment fault model, associating the obtained equipment fault model with the corresponding protection setting value, calculating the sensitivity corresponding to each protection setting value to check and determine the selected sensitivity, and performing relay protection management on the protection equipment corresponding to the selected sensitivity, which improves the efficiency and accuracy of online checking of power grid equipment in relay protection.

[0066] The above is the preferred embodiment of the present application, it should be noted that for those skilled in the art, without departing from the principles of the present application, can make several improvements and refinements, these improvements and refinements are also considered to be within the scope of the present application.

Claims

1. A power system relay protection method, characterized in that, The relay protection method includes: The system acquires power grid data sets and protection information data sets in real time from the power management system. The power grid data sets include the power grid model and power grid status data. The power grid model includes power grid equipment information data sets, with each power grid equipment information data set corresponding to a power grid device. The protection information data sets include protected devices, protection devices, and corresponding protection settings. Based on the power grid equipment information data set, power grid status data, and power grid model, an equipment fault model is obtained, and based on the equipment fault model and the protection information data set, the protection setting value is associated with the equipment fault model. Based on the equipment fault model, the power grid data set, and the protection settings, the sensitivity of the protection equipment is calculated to verify the protection settings, and power system relay protection management is performed based on the verification results and the sensitivity. The step of obtaining the equipment fault model based on the power grid equipment information data group, power grid status data, and the power grid model specifically includes: Acquire historical power grid equipment information data sets; Based on the historical power grid equipment information data group and the power grid equipment information data group, determine whether the corresponding power grid equipment is a newly added equipment; Based on the judgment results, power grid status data, and the power grid model, obtain the equipment fault model; The step of obtaining the equipment fault model based on the judgment result, power grid status data, and the power grid model specifically includes: When it is determined that the corresponding power grid equipment is a newly added equipment, a fault model is generated based on the power grid equipment information data group and the power grid status data. When it is determined that the corresponding power grid equipment is not a newly added equipment, the power grid model is used as the equipment fault model; The step of calculating the sensitivity of the protection device based on the equipment fault model, the power grid data set, and the protection settings for protection setting verification specifically includes: Calculate the ratio of the first electrical quantity value to the protection setting value, and use the ratio as the sensitivity of the protection device; the first electrical quantity value is the electrical quantity value between the protected device and the installation location of the protection device; When the sensitivity is greater than 1, the protection setting verification is passed; Otherwise, the protection setting verification will fail; The relay protection method further includes: Based on the historical power grid equipment information data group and the power grid equipment information data group, determine whether the corresponding power grid equipment is invalid equipment; Based on the judgment result and the power grid model, update the historical power grid equipment information data group.

2. The power system relay protection method according to claim 1, characterized in that, The power grid status data includes the operational status of equipment.

3. The power system relay protection method according to claim 2, characterized in that, Based on the verification results and the aforementioned sensitivity, power system relay protection management is carried out, specifically including: Select the first protection device that passes the verification from all protection devices, and obtain the first sensitivity corresponding to the first protection device; From all the first protection devices, select the second protection device with the highest sensitivity, and use the second protection device to perform relay protection management of the power system.

4. A power system relay protection device, characterized in that, The relay protection device includes a data acquisition unit, a model association unit, and a protection verification unit, wherein... The data acquisition unit is used to acquire power grid data sets and protection information data sets in real time from the power management system; the power grid data sets include power grid model and power grid status data; the power grid model includes power grid equipment information data sets, with each power grid equipment information data set corresponding to a power grid device; the protection information data sets include protected equipment, protection equipment, and corresponding protection settings; The model association unit is used to obtain the equipment fault model based on the power grid equipment information data group, the power grid status data and the power grid model, and to associate the protection setting with the equipment fault model based on the equipment fault model and the protection information data group. The verification protection unit is used to calculate the sensitivity of the protection equipment based on the equipment fault model, the power grid data group and the protection setting to verify the protection setting, and to perform power system relay protection management based on the verification result and the sensitivity. The model association unit is further configured to: acquire historical power grid equipment information data sets; determine whether the corresponding power grid equipment is a newly added device based on the historical power grid equipment information data sets and the power grid equipment information data sets; and acquire equipment fault models based on the determination results, power grid status data, and the power grid model. The model association unit is further configured to: when it is determined that the corresponding power grid equipment is a new equipment, generate an equipment fault model based on the power grid equipment information data group and the power grid status data; when it is determined that the corresponding power grid equipment is not a new equipment, use the power grid model as the equipment fault model. The verification protection unit is further configured to: calculate the ratio of a first electrical quantity value to the protection setting value, and use the ratio as the sensitivity of the protection device; the first electrical quantity value is the electrical quantity value between the protected device and the installation location of the protection device; when the sensitivity is greater than 1, the protection setting value verification is passed; otherwise, the protection setting value verification fails. The relay protection device further includes an equipment information update unit, which is used to determine whether the corresponding power grid equipment is invalid based on the historical power grid equipment information data group and the power grid equipment information data group; and to update the historical power grid equipment information data group based on the determination result and the power grid model.

5. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored computer program, wherein, when the computer program is executed, it controls the device containing the computer-readable storage medium to perform the power system relay protection method as described in any one of claims 1 to 3.

6. A power system relay protection system, characterized in that, The relay protection system includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements the power system relay protection method as described in any one of claims 1 to 3.

Images