Method and apparatus for determining the suitability of a 2m channel switch device

Abstract

The application provides a method and a device for determining the adaptability of a 2M channel switching device, comprising: performing a passability test on data of a communication link between a first side relay protection device and a second side relay protection device to obtain a first result; performing a single power supply interruption test on a power supply to obtain a second result; performing a double power supply interruption test on the power supply to obtain a third result; performing a steady-state relay protection simulation and a dynamic switching relay protection test using a simulation model of a power primary system to obtain a fourth result; and determining that the first side 2M channel switching device and the second side 2M channel switching device added are not adapted to a target relay protection system when any one of the first result, the second result, the third result and the fourth result is not passed. Through the method and the device, the adaptability of the 2M channel switching device when accessing the target relay protection system can be determined comprehensively and accurately.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power systems, and particularly relates to a method and a device for determining the adaptability of a 2M channel switching device. BACKGROUND

[0002] At present, power grids are mostly configured with relay protection devices for the first and second lines of defense of power systems, which can timely cut off fault points when faults occur in power systems, thereby ensuring the normal operation of power systems. In power secondary systems, generally, first-side relay protection devices and second-side relay protection devices are included, and the first-side relay protection devices and the second-side relay protection devices perform data communication with the second-side relay protection devices via corresponding target networks. At present, 2M channel switching technology has been applied in some power secondary systems, wherein the 2M channel switching technology mainly uses a 2M channel switching device, and through the 2M channel switching device, the communication network between the first-side relay protection devices and the second-side relay protection devices can be switched, thereby ensuring that the relay protection devices on each side can normally operate when any one of the communication networks fails.

[0003] With the popularization and application of the 2M channel switching device, when the 2M channel switching device is accessed to the relay protection system, the cooperation logic of the traditional relay protection system can no longer be applicable, thereby causing the possibility of incorrect actions of the relay protection system when faults occur. Therefore, before large-scale installation of the 2M channel switching device, it is necessary to test whether the 2M channel switching device is adapted in the relay protection system. At present, the 2M channel switching device can generally only examine the 2M channel switching device from the communication and network performance angles, the test angle is less, and the adaptability of the 2M channel switching device when accessed to the target relay protection system cannot be comprehensively and accurately investigated. SUMMARY

[0004] Therefore, the purpose of the present application is to provide a method and a device for determining the adaptability of a 2M channel switching device, which can comprehensively and accurately determine the adaptability of the 2M channel switching device when accessed to the target relay protection system.

[0005] In a first aspect, the embodiments of the present application provide a method for determining the adaptability of a 2M channel switching device, applied to an upper computer included in a relay protection semi-physical simulation system, the relay protection semi-physical simulation system including the upper computer, an I / O interface device, and a physical entity of a power secondary system; the upper computer communicates with the physical entity of the power secondary system via the I / O interface device, and the upper computer is also used to simulate a simulation model of a power primary system; the physical entity of the power secondary system includes a first side relay protection device, a second side relay protection device, a first side 2M channel switching device connected with the first side relay protection device, a second side 2M channel switching device connected with the second side relay protection device, and the first side relay protection device communicates data with the second side relay protection device via a corresponding target communication link; the determining method includes:

[0006] testing the data of the communication link between the first side relay protection device and the second side relay protection device for passability to obtain a first result;

[0007] when a first power supply connected with the first side 2M channel switching device and a second power supply connected with the second side 2M channel switching device are added, performing a single power supply interruption test on the power supply to obtain a second result;

[0008] when the first power supply connected with the first side 2M channel switching device and the second power supply connected with the second side 2M channel switching device are added, performing a double power supply interruption test on the power supply to obtain a third result;

[0009] when the first result, the second result, and the third result all meet the corresponding pass conditions respectively, using the simulation model of the power primary system to perform a steady-state operation relay protection simulation and a dynamic switching relay protection test respectively to obtain a fourth result;

[0010] when any one of the first result, the second result, the third result, and the fourth result is not passed, determining that the added first side 2M channel switching device and the second side 2M channel switching device are not adapted to the relay protection system.

[0011] Optionally, the step of testing the data of the communication link between the first side relay protection device and the second side relay protection device for passability to obtain a first result includes:

[0012] in response to a trigger operation of testing the passability of the communication link between the first side relay protection device and the second side relay protection device, determining whether the first side relay protection device receives all parameter data of the second side relay protection device;

[0013] determining whether the second side relay protection device receives all parameter data of the first side relay protection device;

[0014] When the first side relay protection device receives all parameter data of the second side relay protection device and the second side relay protection device receives all parameter data of the first side relay protection device, the first result is determined as pass;

[0015] When the first side relay protection device does not receive all parameter data of the second side relay protection device and / or the second side relay protection device does not receive all parameter data of the first side relay protection device, the first result is determined as fail.

[0016] Optionally, the step of performing single-path power supply interruption test on the power supply to obtain the second result comprises:

[0017] In the case that the single-path power supply line of the first power supply to the first side 2M channel switching device is interrupted, it is determined whether the first alarm information of the first side relay protection device and / or the second side relay protection device is received;

[0018] In the case that the single-path power supply line of the second power supply to the second side 2M channel switching device is interrupted, it is determined whether the second alarm information of the first side relay protection device and / or the second side relay protection device is received;

[0019] When the first alarm information or the second alarm information is not received, the second result is determined as pass;

[0020] When the first alarm information and / or the second alarm information is received, the second result is determined as fail;

[0021] Optionally, the step of performing double-path power supply interruption test on the power supply to obtain the third result comprises:

[0022] In the case that the double-path power supply lines of the first power supply to the first side 2M channel switching device are interrupted, the first alarm time of the alarm information issued by the first side relay protection device for switching the communication link of the 2M channel switching device, the second alarm time of the alarm information issued by the second side relay protection device for switching the communication link of the 2M channel switching device, and

[0023] The first running state of the first side relay protection device at the end of the alarm and the first running state of the second side relay protection device at the end of the alarm are detected;

[0024] In the case that the double-path power supply lines of the second power supply to the second side 2M channel switching device are interrupted, the third alarm time of the alarm information issued by the second side relay protection device for switching the communication link of the 2M channel switching device, and the fourth alarm time of the alarm information issued by the second side relay protection device for switching the communication link of the 2M channel switching device, and

[0025] detecting the second operating state of the first side relay protection device at the end of the alarm and the second operating state of the second side relay protection device at the end of the alarm;

[0026] determining an alarm time average based on the first alarm time, the second alarm time, the third alarm time and the fourth alarm time;

[0027] when the alarm time average is less than the alarm time threshold, and the first operating state and the second operating state of the first side relay protection device and the first operating state and the second operating state of the second side relay protection device are all in the recovered operation, determining that the third result is passed;

[0028] when the alarm time average is greater than or equal to the alarm time threshold and / or any one of the first operating state and the second operating state of the first side relay protection device and the first operating state and the second operating state of the second side relay protection device is in the unrecovered operation, determining that the third result is not passed.

[0029] Optionally, the step of using the simulation model of the power primary system to perform the steady-state operation relay protection simulation and the dynamic switching relay protection test to obtain the fourth result and the fifth result, comprises:

[0030] when the first side 2M channel switching device and the second side 2M channel switching device are both configured in the lossy switching mode, using the simulation model of the power primary system to perform the steady-state operation relay protection simulation to obtain a first sub-result;

[0031] when the first side 2M channel switching device and the second side 2M channel switching device are both configured in the lossy switching mode, using the simulation model of the power primary system to combine the steady-state operation relay protection simulation and the dynamic switching relay protection test to obtain a second sub-result;

[0032] when the first side 2M channel switching device and the second side 2M channel switching device are both configured in the lossless switching mode, using the simulation model of the power primary system to perform the steady-state operation relay protection simulation to obtain a third sub-result;

[0033] when the first side 2M channel switching device and the second side 2M channel switching device are both configured in the lossless switching mode, using the simulation model of the power primary system to combine the steady-state operation relay protection simulation and the dynamic switching relay protection test to obtain a fourth sub-result;

[0034] determining the fourth result based on the first sub-result, the second sub-result, the third sub-result and the fourth sub-result.

[0035] Optionally, the step of using the simulation model of the power primary system to perform the steady-state operation relay protection simulation to obtain the first sub-result, comprises:

[0036] simulate the transient ground fault in the protection zone using the simulation model of the power primary system to obtain the lossy average tripping time of the line protection device;

[0037] simulate the line N-2 fault using the simulation model of the power primary system to obtain the lossy average tripping time of the line protection device;

[0038] The simulation model of the power primary system is combined with the steady-state operation relay protection simulation and the dynamic switching relay protection test to obtain a second sub-result, including:

[0039] simulate the transient ground fault in the protection zone using the simulation model of the power primary system under each of the preset multiple 2M channel switching device switching modes to obtain the lossy switching average tripping time of the line protection device under the switching mode;

[0040] simulate the line N-2 fault using the simulation model of the power primary system under each of the preset multiple 2M channel switching device switching modes to obtain the lossy switching average tripping time of the line protection device under the switching mode;

[0041] simulate the transient ground fault in the protection zone using the simulation model of the power primary system under each of the preset multiple 2M channel switching device switching modes to obtain the lossy switching average tripping time of the line protection device under the switching mode;

[0042] The simulation model of the power primary system is combined with the steady-state operation relay protection simulation and the dynamic switching relay protection test to obtain a second sub-result, including:

[0043] simulate the transient ground fault in the protection zone using the simulation model of the power primary system to obtain the lossy average tripping time of the line protection device;

[0044] simulate the line N-2 fault using the simulation model of the power primary system to obtain the lossy average tripping time of the line protection device;

[0045] The simulation model of the power primary system is combined with the steady-state operation relay protection simulation and the dynamic switching relay protection test to obtain a second sub-result, including:

[0046] simulate the transient ground fault in the protection zone using the simulation model of the power primary system under each of the preset multiple 2M channel switching device switching modes to obtain the lossy switching average tripping time of the line protection device under the switching mode;

[0047] simulate a line N-2 fault on the simulation model of the power primary system under each of the preset plurality of switching modes of the 2M channel switching device to obtain an average trip time of the safety and stability control system master station under the switching mode of the 2M channel switching device;

[0048] simulate an out-of-protection-zone transient ground fault on the simulation model of the power primary system under each of the preset plurality of switching modes of the 2M channel switching device to determine a lossless misoperation detection result indicating whether a misoperation of the line protection device occurs under the switching mode of the 2M channel switching device.

[0049] Optionally, the fourth result is determined based on the first sub-result, the second sub-result, the third sub-result, and the fourth sub-result, and the fourth result includes:

[0050] In a case where the first-side 2M channel switching device and the second-side 2M channel switching device are both configured in the lossy switching mode, for each of the switching modes, a first delay value between the lossy average trip time under the switching mode and the lossy average trip time is determined, and

[0051] a second delay value between the lossy average trip time under the switching mode and the lossy average trip time is determined;

[0052] In a case where the first-side 2M channel switching device and the second-side 2M channel switching device are both configured in the lossless switching mode, for each of the switching modes, a third delay value between the lossless average trip time under the switching mode and the lossless average trip time is determined, and

[0053] a fourth delay value between the lossless average trip time under the switching mode and the lossless average trip time is determined;

[0054] When at least one of the first delay value, the second delay value, the third delay value, and the fourth delay value does not satisfy a corresponding delay condition, and / or when the lossy misoperation detection result and the lossless misoperation detection result indicate a misoperation, the fourth result is determined as not passing.

[0055] In a second aspect, an embodiment of the present application provides a determination device for adaptability of a 2M channel switching device, and the determination device includes:

[0056] a first test module configured to perform a passability test on data of a communication link between the first-side relay protection device and the second-side relay protection device to obtain a first result;

[0057] a second test module configured to perform a single power supply interruption test on the power supply when the first power supply connected to the first 2M channel switching device and the second power supply connected to the second 2M channel switching device are installed, and obtain a second result;

[0058] a third test module configured to perform a double power supply interruption test on the power supply when the first power supply connected to the first 2M channel switching device and the second power supply connected to the second 2M channel switching device are installed, and obtain a third result;

[0059] a fourth test module configured to perform a steady-state operation relay protection simulation and a dynamic switching relay protection test using a simulation model of the power primary system when the first result, the second result and the third result all meet the corresponding passing conditions respectively, and obtain a fourth result;

[0060] an evaluation module configured to determine that the first 2M channel switching device and the second 2M channel switching device installed are not compatible with the relay protection system when any one of the first result, the second result, the third result and the fourth result is not passing.

[0061] In a third aspect, an electronic device is provided, which includes a processor, a memory and a bus, the memory stores machine readable instructions executable by the processor, when the electronic device is running, the processor and the memory communicate through the bus, and the machine readable instructions are executed by the processor to perform the steps of the method for determining the compatibility of the 2M channel switching device as described above.

[0062] In a fourth aspect, a computer readable storage medium is provided, which stores a computer program, and the computer program is executed by a processor to perform the steps of the method for determining the compatibility of the 2M channel switching device as described above.

[0063] The method and device for determining the compatibility of the 2M channel switching device provided by the embodiments of the present application can more comprehensively and accurately determine the compatibility of the 2M channel switching device with the target relay protection system when the 2M channel switching device is connected to the target relay protection system, by performing the passing test on the data of the communication link between the first side relay protection device and the second side relay protection device, the single power supply interruption test on the power supply, the double power supply interruption test on the power supply, and the steady-state operation relay protection simulation and the dynamic switching relay protection test using the simulation model of the power primary system.

[0064] In order to make the above objectives, characteristics and advantages of the present application more apparent and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are referred to. BRIEF DESCRIPTION OF DRAWINGS

[0065] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as limiting the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor.

[0066] Figure 1 A structural schematic diagram of a relay protection semi-physical simulation system provided by an exemplary embodiment of the present application is shown;

[0067] Figure 2 A flow chart of a method for determining the adaptability of a 2M channel switching device provided by an exemplary embodiment of the present application is shown;

[0068] Figure 3 A schematic diagram of a simulation model of a power primary system in a 2M channel switching device provided by an exemplary embodiment of the present application is shown; Figure 1

[0069] Figure 4 A structural schematic diagram of a determination device for determining the adaptability of a 2M channel switching device provided by an exemplary embodiment of the present application is shown;

[0070] Figure 5 A structural schematic diagram of an electronic device provided by an exemplary embodiment of the present application is shown. DETAILED DESCRIPTION

[0071] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will combine the drawings in the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, every other embodiment obtained by those skilled in the art without creative labor belongs to the scope of the present application.

[0072] ​With the popularization and application of the 2M channel switching device, when the 2M channel switching device accesses the relay protection system, the cooperation logic of the traditional relay protection system can no longer be applicable, thereby causing the possibility of incorrect action of the relay protection system in the event of a fault. Therefore, before large-scale installation of the 2M channel switching device, it is necessary to test whether the 2M channel switching device is adapted in the relay protection system. At present, the 2M channel switching device can generally be examined only from the communication and network performance angles, the test angle is less, and the adaptability of the 2M channel switching device when accessing the relay protection system cannot be comprehensively and accurately investigated. Based on this, the embodiment of the present application provides a method for determining the adaptability of the 2M channel switching device, which can comprehensively and accurately determine the adaptability of the 2M channel switching device when accessing the target relay protection system.

[0073] For the convenience of understanding, first, a relay protection semi-physical simulation system provided by the embodiment of the present application is introduced. Please refer to Figure 1 , Figure 1 The structure schematic diagram of the relay protection semi-physical simulation system provided by the embodiment of the present application is shown.

[0074] As shown in Figure 1 , the relay protection semi-physical simulation system includes an upper computer, an I / O interface device and a physical entity of a power secondary system; the upper computer communicates with the physical entity of the power secondary system via the I / O interface device, and the upper computer is also used for simulating a simulation model of a power primary system.

[0075] The physical entity of the power secondary system includes: a first side relay protection device, a second side relay protection device, a first side 2M channel switching device connected with the first side relay protection device, a second side 2M channel switching device connected with the second side relay protection device, and the first side relay protection device communicates data with the second side relay protection device via a corresponding target communication link.

[0076] Specifically, the first side relay protection device can be connected through an optical fiber and the first side 2M channel switching device, and the second side relay protection device can be connected through an optical fiber and the second side 2M channel switching device. The communication network between the first side 2M channel switching device and the second side 2M channel switching device includes a first network and a second network, and as an example, the first network and the second network can both be SDH networks. Here, the first side 2M channel switching device and the second side 2M channel switching device are used to switch the communication link between the first side relay protection device and the second side relay protection device by switching the first network and the second network;

[0077] Further, as an example, the first side relay protection device and the second side relay protection device can each include at least one relay protection device group, each relay protection device group including a line protection device and a security and stability control device. Among them, each relay protection device group in the first side relay protection device is connected with the first side 2M channel switching device, and each relay protection device group in the first side relay protection device can be connected to the first network or the second network through the first side 2M channel switching device; each relay protection device group in the second side relay protection device is connected with the second side 2M channel switching device, and each relay protection device group in the second side relay protection device can be connected to the first network or the second network through the second side 2M channel switching device, based on the above connection structure, the communication link between each relay protection device group in the first relay protection device and each relay protection device group in the second relay protection device can be changed through the switching action of the first 2M channel switching device and the second 2M channel switching device.

[0078] Please refer to Figure 2 , Figure 2 A simulation test method for a 2M channel switching device for relay protection is provided for the embodiments of the present application. As shown in Figure 2 The simulation test method provided by the embodiments of the present application includes the following steps:

[0079] S101, test the data passing of the communication link between the first side relay protection device and the second side relay protection device to obtain a first result.

[0080] As an example, this step can include:

[0081] S1011, in response to the trigger operation of testing the passing of the communication link between the first side relay protection device and the second side relay protection device, determine whether the first side relay protection device receives all parameter data of the second side relay protection device; here, the parameter data of the second side relay protection device includes electrical quantities and switching quantities of the second side relay protection device;

[0082] As an example, when the first side relay protection device includes a plurality of relay protection device groups and the second side relay protection device includes a plurality of relay protection device groups, all parameter data of the second side relay protection device represents electrical quantities and switching quantities corresponding to all relay protection device groups in the second relay protection device.

[0083] S1012, determine whether the second side relay protection device receives all parameter data of the first side relay protection device; here, the parameter data of the first side relay protection device includes electrical quantities and switching quantities of the first side relay protection device;

[0084] As an example, when the first side relay protection device comprises a plurality of relay protection device groups and the second side relay protection device comprises a plurality of relay protection device groups, all parameter data of the first side relay protection device represent electrical quantities and switch quantities corresponding to all relay protection device groups in the first relay protection device.

[0085] S1013, when the first side relay protection device receives all parameter data of the second side relay protection device and the second side relay protection device receives all parameter data of the first side relay protection device, determining that the first result is pass;

[0086] S1014, when the first side relay protection device does not receive all parameter data of the second side relay protection device and / or the second side relay protection device does not receive all parameter data of the first side relay protection device, determining that the first result is fail.

[0087] It can be understood that when the first side relay protection device does not receive all parameter data of the second side relay protection device and / or the second side relay protection device does not receive all parameter data of the first side relay protection device, it indicates that the first side 2M channel switching device and the second side 2M channel switching device are not adapted when installed on the relay protection semi-physical simulation system, thereby causing a communication failure in the communication link between the first side relay protection device and the second side relay protection device.

[0088] S102, when the first power supply connected with the first side 2M channel switching device and the second power supply connected with the second side 2M channel switching device are installed, performing a single-path power supply interruption test on the power supply to obtain a second result;

[0089] Here, when the first power supply connected with the first side 2M channel switching device and the second power supply connected with the second side 2M channel switching device are installed, the first power supply supplies power to the first side 2M channel switching device through two paths (for example, A path and B path) before the test, and the second power supply supplies power to the second side 2M channel switching device through two paths (for example, C path and D path).

[0090] It should be noted that the purpose of the test in this step is to test the hot standby function of the first power supply and the second power supply. Taking the first power supply as an example, generally speaking, in the case that one of the two paths of the first power supply is interrupted, the first power supply can supply power to the first side 2M channel switching device through the other path without causing a short-term connection failure of the first side 2M channel switching device, which is the hot standby function of the first power supply, and the second power supply is the same.

[0091] As an example, this step can include:

[0092] 1021. determining whether the first alarm information of the first side relay protection device and / or the second side relay protection device is received in the case that the single side power supply line of the first power supply to the first side 2M channel switching device is interrupted;

[0093] As an example, in this step, first, it can be determined whether the first alarm information of the first side relay protection device and / or the second side relay protection device is received in the case that the A route of the first power supply is interrupted; then, it can be determined whether the first alarm information of the first side relay protection device and / or the second side relay protection device is received in the case that the B route of the first power supply is interrupted; here, the first alarm information indicates that the first side 2M channel switching device has a transient connection failure, for example, the transient connection failure can include that the first side 2M channel switching device has a transient trip.

[0094] 1022. determining whether the second alarm information of the first side relay protection device and / or the second side relay protection device is received in the case that the single side power supply line of the second power supply to the second side 2M channel switching device is interrupted;

[0095] As an example, in this step, first, it can be determined whether the second alarm information of the first side relay protection device and / or the second side relay protection device is received in the case that the A route of the second power supply is interrupted; then, it can be determined whether the second alarm information of the first side relay protection device and / or the second side relay protection device is received in the case that the B route of the second power supply is interrupted; here, the second alarm information indicates that the second side 2M channel switching device has a transient connection failure, for example, the transient connection failure can include that the second side 2M channel switching device has a transient trip.

[0096] 1023. determining that the second result is pass when the first alarm information or the second alarm information is not received;

[0097] 1024. determining that the second result is fail when the first alarm information and / or the second alarm information is received;

[0098] Here, when the first alarm information and / or the second alarm information is received, it indicates that the hot standby function of the first power supply or the second power supply is not good, and the first 2M channel switching device installed with the first power supply and the second 2M channel switching device installed with the second power supply are not suitable for the target relay protection system when they are applied to the target relay protection system.

[0099] S103. when the first power supply connected with the first side 2M channel switching device and the second power supply connected with the second side 2M channel switching device are installed, performing a double route power supply interruption test on the power supply to obtain a third result;

[0100] It should be noted that the purpose of the test in this step is to test the link switching of the first side 2M channel switching device and the second side 2M channel switching device. Taking the first power supply as an example, in general, when the double-sided power supply lines of the first power supply are interrupted, the first side 2M channel switching device will switch to the pre-set main network. For example, if the pre-set main network is the first network and the network currently connected by the first side 2M channel switching device is the second network, when the double-sided power supply lines of the first power supply are interrupted, the first side 2M channel switching device will switch from the second network to the first network, so that the first side relay protection device and the second side relay protection device transmit data through the main link.

[0101] As an example, step S103 can include:

[0102] S1031, in the case that the double-sided power supply lines of the first power supply to the first side 2M channel switching device are interrupted, acquiring the first alarm time of the alarm information issued by the first side relay protection device for the 2M channel switching device to switch the communication link, the second alarm time of the alarm information issued by the second side relay protection device for the 2M channel switching device to switch the communication link, detecting the running state of the first side relay protection device and the running state of the second side relay protection device, and detecting the first running state of the first side relay protection device at the end of the alarm and the first running state of the second side relay protection device at the end of the alarm;

[0103] Here, when the first side relay protection device includes a plurality of first relay protection device groups, the first alarm time can be the average alarm time of the plurality of first relay protection device groups, and when the second side relay protection device includes a plurality of second relay protection device groups, the second alarm time can be the average alarm time of the plurality of second relay protection device groups.

[0104] Here, the running state includes a recovered running and an unrecovered running.

[0105] S1032, in the case that the double-sided power supply lines of the second power supply to the second side 2M channel switching device are interrupted, acquiring the third alarm time of the alarm information issued by the second side relay protection device for the 2M channel switching device to switch the communication link, the fourth alarm time of the alarm information issued by the second side relay protection device for the 2M channel switching device to switch the communication link, and detecting the second running state of the first side relay protection device at the end of the alarm and the second running state of the second side relay protection device at the end of the alarm;

[0106] Here, when the first side relay protection device includes a plurality of first relay protection device groups, the third alarm time can be an average alarm time of the plurality of first relay protection device groups, and when the second side relay protection device includes a plurality of second relay protection device groups, the fourth alarm time can be an average alarm time of the plurality of second relay protection device groups.

[0107] S1033, determining an alarm time mean value based on the first alarm time, the second alarm time, the third alarm time and the fourth alarm time;

[0108] Here, an average of the first alarm time, the second alarm time, the third alarm time and the fourth alarm time can be determined as the alarm time mean value.

[0109] S1034, when the alarm time mean value is less than an alarm time threshold value, and the first operating state and the second operating state of the first side relay protection device and the first operating state and the second operating state of the second side relay protection device are all in a recovered operation, determining that the third result is passed;

[0110] Preferably, the alarm time threshold value can be 50ms.

[0111] S1035, when the alarm time mean value is greater than or equal to the alarm time threshold value and / or any one of the first operating state and the second operating state of the first side relay protection device and the first operating state and the second operating state of the second side relay protection device is in an unrecovered operation, determining that the third result is not passed.

[0112] S104, when the first result, the second result and the third result all respectively meet the corresponding passing conditions, using a simulation model of the power primary system to respectively perform a steady-state operation relay protection simulation and a dynamic switching relay protection test, and obtaining a fourth result and a fifth result;

[0113] Here, please refer to Figure 3 , Figure 3 A schematic diagram of a simulation model of a power primary system provided by an example embodiment of the present application is shown.

[0114] As Figure 3As shown, the simulation model of the power primary system includes: a first side substation model (M side substation) for simulating a first side substation of a 220KV and above voltage level, a second side substation model (N side substation) for simulating a second side substation of a 220KV and above voltage level, a first transmission line model (transmission line 1) for simulating a first transmission line, and a second transmission line model (transmission line 2) for simulating a second transmission line, a first power plant model (power plant 1) for simulating a first power plant, and a second power plant model (power plant 2) for simulating a second power plant. Here, the parameters of the transmission line 1 and the transmission line 2 are set according to the channel nodes and distances of the SDH network. Here, the simulation model of the power primary system can be used to simulate the first and second lines of defense of the power system.

[0115] Specifically, when the simulation model of the power primary system simulates the first line of defense, the electrical quantities and switching quantities of the transmission line 1 are connected to the line protection devices in the first side relay protection device and the line protection devices in the second side relay protection device at the same time. In addition, the simulation model of the power primary system is also configured with K1 to K6 fault points for steady-state operation relay protection simulation and dynamic switching relay protection test of the 2M channel switching device. Among them, the K1, K2, K3 short-circuit fault positions of the first transmission line are used as fault points for the in-zone fault test of the first transmission line, and the K4, K5, K6 short-circuit fault positions of the second transmission line are used as fault points for the out-of-zone fault test of the first transmission line.

[0116] When the simulation model of the power primary system simulates the second line of defense, the N side substation is used as the master station of the security and stability control system, the M side substation is used as the substation of the security and stability control system, the power plant 1 is used as the execution station 1 of the security and stability control system, and the power plant 2 is used as the execution station 2 of the security and stability control system. The electrical quantities and switching quantities of the N side substation are connected to the real master station device, the electrical quantities and switching quantities of the M side substation are connected to the real substation device, the generator set electrical quantities of the power plant 1 are connected to the real execution station 1, and the generator set electrical quantities of the power plant 2 are connected to the real execution station 2. The transmission line 1 and the transmission line 2 are used as the detection flow section, and the K2 and K4 short-circuit fault positions are used as the fault points for the N-2 fault test of the security and stability control system.

[0117] In the following, the simulation model of the power primary system will be described in detail with reference to the following figures. Figure 3 The step S104 will be described in detail. As an example, the step S104 can include the following steps:

[0118] S1041, in the case where the first side 2M channel switching device and the second side 2M channel switching device are both configured in the lossy switching mode, using the simulation model of the power primary system to perform steady-state operation relay protection simulation to obtain a first sub-result;

[0119] As an example, the following operations can be performed in this step:

[0120] (1) Simulate transient ground faults in the protection zone using the simulation model of the primary power system to obtain the lossy average trip time of the line protection device; here, simulating transient ground faults in the protection zone is to simulate the first line of defense of the power system.

[0121] Specifically, referring to Figure 3 , when simulating transient ground faults in the protection zone using the simulation model of the primary power system, each of the K1, K2, and K3 fault points in Figure 3 is triggered simultaneously with A-phase, B-phase, and C-phase ground faults, and the duration of each triggered fault can be 0.1s. The trip action time of the line protection device is recorded at each triggered fault, and the test is repeated multiple times in succession.

[0122] Here, the lossy average trip time of the line protection device can be obtained based on the trip action time of the line protection device recorded at each triggered fault.

[0123] As an example, when the relay protection device on each side includes multiple line protection devices, the trip action time of each line protection device can be recorded at each triggered fault. Then, based on the trip action time of each line protection device, the average trip time of all line protection devices when the fault is triggered is determined. Finally, based on the average trip time of the line protection device under all faults, the lossy average trip time T1 of the line protection device is determined.

[0124] (2) Simulate line N-2 faults using the simulation model of the primary power system to obtain the lossy average removal time of the main station of the security and stability control system on the simulation model of the primary power system; here, simulating line N-2 faults is to simulate the second line of defense of the power system.

[0125] Specifically, referring to Figure 3 , when simulating line N-2 faults using the simulation model of the primary power system, three-phase ground faults are triggered at the K2 and K4 points in Figure 3 at the same time, and the duration of the triggered fault can be 2s. The removal action time of the main station of the security and stability control system is recorded at each triggered fault, and the test is repeated multiple times in succession.

[0126] Here, the removal action time of the main station of the security and stability control system represents the trip action time of the main station of the security and stability control system to remove the thermal power unit of the corresponding security and stability control system execution station.

[0127] Here, the average value of the removal action time of the main station of the security and stability control system recorded at each triggered fault can be determined as the lossy average removal time T2 of the main station of the security and stability control system.

[0128] S1042, in the first side 2M channel switching device and the second side 2M channel switching device are configured in the lossy switching mode, using the simulation model of the power primary system, combining the steady-state operation relay protection simulation and the dynamic switching relay protection test, a second sub-result is obtained;

[0129] As an example, the following operations can be performed in this step:

[0130] (3) In each of the switching modes of the preset plurality of 2M channel switching devices, the simulation model of the power primary system is used to simulate the transient ground fault in the protection area, and the average tripping time of the line protection device in the switching mode is obtained;

[0131] Here, the preset plurality of 2M channel switching device switching modes can include but are not limited to "no signal" alarm switching, AIS alarm switching, error code alarm switching, LOF out-of-step alarm switching and forced switching. Here, "no signal" alarm switching, AIS alarm switching, error code alarm switching, LOF out-of-step alarm switching and forced switching are all existing switching modes, so this application will not be repeated here.

[0132] Here, the way of simulating the transient ground fault in the protection area using the simulation model of the power primary system in each of the switching modes of the 2M channel switching device is the same as operation (1), so it will not be repeated here.

[0133] Through operation (3), the average tripping time T 31 , T 32 , T 33 , T 34 , T 35 of the line protection device corresponding to "no signal" alarm switching, AIS alarm switching, error code alarm switching, LOF out-of-step alarm switching and forced switching in the lossy switching mode can be obtained.

[0134] (4) In each of the switching modes of the preset plurality of 2M channel switching devices, the simulation model of the power primary system is used to simulate the line N-2 fault, and the average tripping time of the security and stability control system master station in the simulation model of the power primary system in the switching mode is obtained.

[0135] Here, the way of simulating the line N-2 fault using the simulation model of the power primary system in each of the switching modes of the 2M channel switching device and the calculation are the same as operation (2), so it will not be repeated here.

[0136] By operation (4), the average switching-off time T of the security and stability control system master station corresponding to the lossy switching mode of the "no signal" alarm switching, AIS alarm switching, error code alarm switching, LOF out-of-step alarm switching and forced switching can be obtained. 41 42 43 44 45 .

[0137] (5) Simulate the out-of-protection-zone transient ground fault using the simulation model of the electric power primary system in each of the switching modes of the preset plurality of 2M channel switching devices to determine the lossy misoperation detection result indicating whether the line protection device misoperates in the switching mode.

[0138] Specifically, referring to Figure 3 , when simulating the out-of-protection-zone transient ground fault using the simulation model of the electric power primary system, each of the K4, K5 and K6 fault points in Figure 4 is triggered with A-phase, B-phase and C-phase ground faults at the same time, and the duration of each triggered fault can be 0.1s. Whether the line protection device misoperates is recorded at each time of triggering the fault, and the test is performed multiple times in succession.

[0139] By operation (5), the lossy misoperation detection results R1, R2, R3, R4 and R5 of the line protection device corresponding to the lossy switching mode of the "no signal" alarm switching, AIS alarm switching, error code alarm switching, LOF out-of-step alarm switching and forced switching can be obtained.

[0140] S1043, when the first side 2M channel switching device and the second side 2M channel switching device are both configured in the lossless switching mode, perform steady-state operation relay protection simulation using the simulation model of the electric power primary system to obtain a third sub-result.

[0141] As an example, the following operation can be performed in this step:

[0142] (6) Simulate the in-protection-zone transient ground fault using the simulation model of the electric power primary system to obtain the lossless average tripping time of the line protection device.

[0143] Here, the way of simulating the in-protection-zone transient ground fault using the simulation model of the electric power primary system and the calculation are the same as those of operation (1), and thus are not described again.

[0144] By operation (6), the lossless average tripping time T1 ’ of the line protection device can be obtained.

[0145] ​​​​(7) using the simulation model of the power primary system to simulate the line N-2 fault, obtaining the lossless average trip time of the main station of the security and stability control system on the simulation model of the power primary system;

[0146] Here, the way of using the simulation model of the power primary system to simulate the line N-2 fault and the calculation and operation are the same as those in operation (1), and thus will not be repeated.

[0147] Through operation (7), the lossless average trip time T2 of the main station of the security and stability control system can be obtained ’ .

[0148] S1044, in the case that the first side 2M channel switching device and the second side 2M channel switching device are both configured in the lossless switching mode, using the simulation model of the power primary system to simulate and test the steady-state operation relay protection and the dynamic switching relay protection, obtaining the fourth sub-result;

[0149] (8) using the simulation model of the power primary system to simulate the transient ground fault in the protection area under each switching mode of the preset plurality of 2M channel switching devices, obtaining the lossy switching average trip time of the line protection device under the switching mode;

[0150] Here, the way of using the simulation model of the power primary system to simulate the transient ground fault in the protection area under each switching mode of the 2M channel switching device is the same as that in operation (1), and thus will not be repeated.

[0151] Through operation (8), the lossy switching average trip time of the line protection device corresponding to the “no signal” alarm switching, AIS alarm switching, error code alarm switching, LOF out-of-step alarm switching and forced switching under the lossless switching mode can be obtained: T3 ’ 1, T3 ’ 2, T3 ’ 3, T3 ’ 4, T3 ’ 5.

[0152] (9) using the simulation model of the power primary system to simulate the line N-2 fault under each switching mode of the preset plurality of 2M channel switching devices, obtaining the lossless switching average trip time of the main station of the security and stability control system on the simulation model of the power primary system under the switching mode;

[0153] Here, the way of using the simulation model of the power primary system to simulate the line N-2 fault under each switching mode of the 2M channel switching device and the calculation and operation are the same as those in operation (2), and thus will not be repeated.

[0154] The average switching time T4 of the security and stability control system master station corresponding to the "no signal" alarm switching, AIS alarm switching, error code alarm switching, LOF out-of-step alarm switching and forced switching in the lossy switching mode can be obtained by operation (9) ’ 1, T4 ’ 2, T4 ’ 3, T4 ’ 4, T4 ’ 5.

[0155] (10) Simulate the out-of-protection-zone transient ground fault by using the simulation model of the power primary system in each 2M channel switching device switching mode of the preset plurality of 2M channel switching device switching modes, to determine the lossless misoperation detection result indicating whether the line protection device misoperates in the switching mode.

[0156] Here, the way of simulating the out-of-protection-zone transient ground fault by using the simulation model of the power primary system in each 2M channel switching device switching mode is the same as that of operation (5), and thus will not be described again.

[0157] S1045, determining the fourth result based on the first sub-result, the second sub-result, the third sub-result and the fourth sub-result.

[0158] As an example, this step can include:

[0159] S10451, in the case where the first side 2M channel switching device and the second side 2M channel switching device are both configured in the lossy switching mode, determining, for each switching mode, a first delay value between the lossy switching average tripping time in the switching mode and the lossy average tripping time;

[0160] As an example, the absolute value of the difference between the lossy switching average tripping time in the switching mode and the lossy average tripping time can be determined as the first delay value.

[0161] S10452, determining a second delay value between the lossy switching average clearing time in the switching mode and the lossy average clearing time;

[0162] As an example, the absolute value of the difference between the lossy switching average clearing time in the switching mode and the lossy average clearing time can be determined as the second delay value.

[0163] S10453, in the case where the first side 2M channel switching device and the second side 2M channel switching device are both configured in the lossless switching mode, determining, for each switching mode, a third delay value between the lossless switching average tripping time in the switching mode and the lossless average tripping time;

[0164] As an example, the absolute value of the difference between the lossless switching average trip time in the switching mode and the lossless average trip time can be determined as the third delay value.

[0165] S10454, determining a fourth delay value between the lossless switching average trip time in the switching mode and the lossless average trip time;

[0166] As an example, the absolute value of the difference between the lossless switching average trip time in the switching mode and the lossless average trip time can be determined as the third delay value.

[0167] S10455, when at least one of the first delay value, the second delay value, the third delay value and the fourth delay value does not satisfy the corresponding delay condition, and / or when the lossy misoperation detection result and the lossless misoperation detection result appear misoperation results, determining that the fourth result is not passed;

[0168] Here, the delay condition corresponding to the first delay value is less than a first preset threshold, preferably the first preset threshold is 12ms. The delay condition of the second delay value is less than a second preset threshold, preferably the second preset threshold is 20ms, the delay condition corresponding to the third delay value is less than a third preset threshold, preferably the third preset threshold is 12ms. The delay condition of the fourth delay value is less than a fourth preset threshold, preferably the fourth preset threshold is 20ms,

[0169] In addition, in step S10456, when the first delay value, the second delay value, the third delay value and the fourth delay value all satisfy the corresponding delay condition, and the lossy misoperation detection result and the lossless misoperation detection result are both not misoperation results, it is determined that the fourth result is passed.

[0170] S105, when any one of the first result, the second result, the third result and the fourth result is not passed, determining that the first side 2M channel switching device and the second side 2M channel switching device added are not adapted to the target relay protection system.

[0171] When the fourth result is passed, it is determined that the first side 2M channel switching device and the second side 2M channel switching device added are adapted to the target relay protection system.

[0172] The method for determining the adaptability of the 2M channel switching device provided by the embodiments of the application determines the adaptability of the 2M channel switching device when accessing the target relay protection system and the target relay protection system more comprehensively and accurately by testing the data of the communication link between the first side relay protection device and the second side relay protection device, testing the single power supply interruption of the power supply, testing the double power supply interruption of the power supply, and using the simulation model of the power system to respectively perform the steady-state operation relay protection simulation and the dynamic switching relay protection test.

[0173] Figure 4 Fig. 1 shows a structural schematic diagram of a determination device for adaptability of a 2M channel switching device according to an example embodiment of the present application.

[0174] As shown in Figure 5 , the determination device 400 comprises:

[0175] 410, a first test module, configured to perform a passability test on data of a communication link between the first side relay protection device and the second side relay protection device, to obtain a first result;

[0176] 420, a second test module, configured to perform a single power supply interruption test on the power supply when the first power supply connected with the first side 2M channel switching device and the second power supply connected with the second side 2M channel switching device are installed, to obtain a second result;

[0177] 430, a third test module, configured to perform a double power supply interruption test on the power supply when the first power supply connected with the first side 2M channel switching device and the second power supply connected with the second side 2M channel switching device are installed, to obtain a third result;

[0178] 440, a fourth test module, configured to perform a steady-state operation relay protection simulation and a dynamic switching relay protection test using a simulation model of the power primary system respectively when the first result, the second result and the third result all meet corresponding pass conditions respectively, to obtain a fourth result;

[0179] 450, an evaluation module, configured to determine that the installed first side 2M channel switching device and the second side 2M channel switching device are not adapted to the relay protection system when any one of the first result, the second result, the third result and the fourth result is not passed.

[0180] The determination device provided by the example embodiments of the present application performs a passability test on data of a communication link between the first side relay protection device and the second side relay protection device, a single power supply interruption test on the power supply, a double power supply interruption test on the power supply, and a steady-state operation relay protection simulation and a dynamic switching relay protection test using a simulation model of the power primary system respectively, so as to more comprehensively and accurately determine the adaptability of the 2M channel switching device when accessing the target relay protection system.

[0181] Please refer to Figure 5 , Figure 5 Fig. 1 shows a structural schematic diagram of a determination device for adaptability of a 2M channel switching device according to an example embodiment of the present application. ​ As shown in

[0182] The memory 520 stores machine readable instructions executable by the processor 510. When the electronic device 500 is running, the processor 510 communicates with the memory 520 through the bus 530. The machine readable instructions are executed by the processor 510 to perform the steps of the method for determining the adaptability of the 2M channel switching device in the above method embodiments. For details, refer to the method embodiments, which will not be described here.

[0183] The computer readable storage medium stores a computer program. When the computer program is run by the processor, the steps of the method for determining the adaptability of the 2M channel switching device in the above method embodiments can be performed. For details, refer to the method embodiments, which will not be described here.

[0184] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0185] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented by other ways. The above-described device embodiments are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some communication interface, device or unit, which can be electrical, mechanical or other forms.

[0186] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. According to actual needs, some or all of the units can be selected to achieve the purpose of the present embodiment.

[0187] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit.

[0188] If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a nonvolatile computer readable storage medium executable by a processor. Based on this understanding, the technical solutions of the present application essentially or the parts of the prior art that make contributions or parts of the technical solutions can be embodied in the form of software products. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0189] Finally, it should be noted that: the above-described embodiments are only specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, but not to limit them. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can make modifications or easily think of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed by the present application, or make equivalent replacements to some of the technical features. The modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method of determining the suitability of a 2M channel switching device, characterized in that, The application is applied to an upper computer of a relay protection semi-physical simulation system, the relay protection semi-physical simulation system comprising an upper computer, an I / O interface device and a physical entity of a power secondary system; the upper computer communicates with the physical entity of the power secondary system via the I / O interface device, and the upper computer is also used for simulating a simulation model of a power primary system; the physical entity of the power secondary system comprises a first side relay protection device, a second side relay protection device, a first side 2M channel switching device connected with the first side relay protection device, a second side 2M channel switching device connected with the second side relay protection device, and the first side relay protection device communicates with the second side relay protection device via a corresponding target communication link; the determination method comprises: performing a passability test on data of a communication link between the first side relay protection device and the second side relay protection device to obtain a first result; when a first power supply connected with the first side 2M channel switching device and a second power supply connected with the second side 2M channel switching device are added, performing a single power supply interruption test on the power supply to obtain a second result; when the first power supply connected with the first side 2M channel switching device and the second power supply connected with the second side 2M channel switching device are added, performing a double power supply interruption test on the power supply to obtain a third result; in a case where the first side 2M channel switching device and the second side 2M channel switching device are both configured as a lossy switching mode, performing a steady-state operation relay protection simulation using the simulation model of the power primary system to obtain a first sub-result; in a case where the first side 2M channel switching device and the second side 2M channel switching device are both configured as a lossy switching mode, performing a steady-state operation relay protection simulation combined with a dynamic switching relay protection test using the simulation model of the power primary system to obtain a second sub-result; in a case where the first side 2M channel switching device and the second side 2M channel switching device are both configured as a lossless switching mode, performing a steady-state operation relay protection simulation using the simulation model of the power primary system to obtain a third sub-result; in a case where the first side 2M channel switching device and the second side 2M channel switching device are both configured as a lossless switching mode, performing a steady-state operation relay protection simulation combined with a dynamic switching relay protection test using the simulation model of the power primary system to obtain a fourth sub-result; determining a fourth result based on the first sub-result, the second sub-result, the third sub-result and the fourth sub-result; when any one of the first result, the second result, the third result and the fourth result is not passed, determining that the added first side 2M channel switching device and the second side 2M channel switching device are not suitable for the target relay protection system.

2. The determination method according to claim 1, characterized in that: The step of performing a passability test on data of a communication link between the first side relay protection device and the second side relay protection device to obtain a first result comprises: in response to a trigger operation of testing the passability of the communication link between the first side relay protection device and the second side relay protection device, determining whether the first side relay protection device receives all parameter data of the second side relay protection device; determining whether the second side relay protection device receives all parameter data of the first side relay protection device; determining the first result as pass when the first side relay protection device receives all parameter data of the second side relay protection device and the second side relay protection device receives all parameter data of the first side relay protection device; determining the first result as fail when the first side relay protection device does not receive all parameter data of the second side relay protection device and / or the second side relay protection device does not receive all parameter data of the first side relay protection device.

3. The determination method according to claim 1, characterized in that, the step of performing single-path power supply interruption test on the power supply to obtain the second result, comprising: determining whether the first alarm information of the first side relay protection device and / or the second side relay protection device is received in the case that the single-path power supply line of the first power supply to the first side 2M channel switching device is interrupted; determining whether the second alarm information of the first side relay protection device and / or the second side relay protection device is received in the case that the single-path power supply line of the second power supply to the second side 2M channel switching device is interrupted; determining the second result as pass when the first alarm information or the second alarm information is not received; determining the second result as fail when the first alarm information and / or the second alarm information is received.

4. The determination method according to claim 1, characterized in that, the step of performing double-path power supply interruption test on the power supply to obtain the third result, comprising: acquiring the first alarm time of the alarm information of the first side relay protection device for switching the communication link of the 2M channel switching device, the second alarm time of the alarm information of the second side relay protection device for switching the communication link of the 2M channel switching device, and the third alarm time of the alarm information of the second side relay protection device for switching the communication link of the 2M channel switching device, and the fourth alarm time of the alarm information of the second side relay protection device for switching the communication link of the 2M channel switching device in the case that the double-path power supply lines of the first power supply to the first side 2M channel switching device are interrupted, and detecting the first running state of the first side relay protection device at the end of the alarm and the first running state of the second side relay protection device at the end of the alarm; acquiring the third alarm time of the alarm information of the second side relay protection device for switching the communication link of the 2M channel switching device, and the fourth alarm time of the alarm information of the second side relay protection device for switching the communication link of the 2M channel switching device in the case that the double-path power supply lines of the second power supply to the second side 2M channel switching device are interrupted, and detecting the second running state of the first side relay protection device at the end of the alarm and the second running state of the second side relay protection device at the end of the alarm; determining the alarm time average based on the first alarm time, the second alarm time, the third alarm time and the fourth alarm time; determining the third result as pass when the alarm time average is less than the alarm time threshold value, and the first running state and the second running state of the first side relay protection device and the first running state and the second running state of the second side relay protection device are all recovered running; determining the third result as fail when the alarm time average is greater than or equal to the alarm time threshold value and / or any one of the first running state and the second running state of the first side relay protection device and the first running state and the second running state of the second side relay protection device is not recovered running.

5. The determination method of claim 1, wherein, the step of performing steady-state operation relay protection simulation using the simulation model of the power system to obtain the first sub-result, comprising: Simulate the transient ground fault in the protection zone using the simulation model of the power primary system to obtain the lossy average tripping time of the line protection device; Simulate the line N-2 fault using the simulation model of the power primary system to obtain the lossy average tripping time of the line protection device; The simulation model of the power primary system is combined with the steady-state operation relay protection simulation and the dynamic switching relay protection test to obtain a second sub-result, including: Simulate the transient ground fault in the protection zone using the simulation model of the power primary system under each of the preset multiple 2M channel switching device switching modes to obtain the lossy switching average tripping time of the line protection device under the switching mode; Simulate the line N-2 fault using the simulation model of the power primary system under each of the preset multiple 2M channel switching device switching modes to obtain the lossy switching average tripping time of the line protection device under the switching mode; Simulate the transient ground fault in the protection zone using the simulation model of the power primary system under each of the preset multiple 2M channel switching device switching modes to obtain the lossy switching average tripping time of the line protection device under the switching mode; The simulation model of the power primary system is combined with the steady-state operation relay protection simulation and the dynamic switching relay protection test to obtain a second sub-result, including: Simulate the transient ground fault in the protection zone using the simulation model of the power primary system to obtain the lossy average tripping time of the line protection device; Simulate the line N-2 fault using the simulation model of the power primary system to obtain the lossy average tripping time of the line protection device; The simulation model of the power primary system is combined with the steady-state operation relay protection simulation and the dynamic switching relay protection test to obtain a second sub-result, including: Simulate the transient ground fault in the protection zone using the simulation model of the power primary system under each of the preset multiple 2M channel switching device switching modes to obtain the lossy switching average tripping time of the line protection device under the switching mode; Simulate the line N-2 fault using the simulation model of the power primary system under each of the preset multiple 2M channel switching device switching modes to obtain the lossy switching average tripping time of the line protection device under the switching mode; Simulate the transient ground fault in the protection zone using the simulation model of the power primary system under each of the preset multiple 2M channel switching device switching modes to obtain the lossy switching average tripping time of the line protection device under the switching mode.

6. The determination method according to claim 5, characterized in that, The fourth result is determined based on the first sub-result, the second sub-result, the third sub-result and the fourth sub-result, including: In the case that the first side 2M channel switching device and the second side 2M channel switching device are both configured in the lossy switching mode, for each switching mode, a first delay value between the lossy switching average trip time in the switching mode and the lossy average trip time is determined, and a second delay value between the lossy switching average trip time in the switching mode and the lossy average trip time is determined; In the case that the first side 2M channel switching device and the second side 2M channel switching device are both configured in the lossless switching mode, for each switching mode, a third delay value between the lossless switching average trip time in the switching mode and the lossless average trip time is determined, and a fourth delay value between the lossless switching average trip time in the switching mode and the lossless average trip time is determined; In the case that at least one of the first delay value, the second delay value, the third delay value and the fourth delay value does not satisfy the corresponding delay condition, and / or the result of the lossy misoperation detection result and the lossless misoperation detection result is a misoperation, the fourth result is determined as not passing.

7. A device for determining the suitability of a 2M channel switching device, characterized in that The determination device comprises: a first test module configured to perform a passability test on data of a communication link between the first side relay protection device and the second side relay protection device, and obtain a first result; a second test module configured to, when a first power supply connected with the first side 2M channel switching device and a second power supply connected with the second side 2M channel switching device are added, perform a single power supply interruption test on the power supply, and obtain a second result; a third test module configured to, when the first power supply connected with the first side 2M channel switching device and the second power supply connected with the second side 2M channel switching device are added, perform a double power supply interruption test on the power supply, and obtain a third result; a fourth test module configured to, in the case that the first side 2M channel switching device and the second side 2M channel switching device are both configured in the lossy switching mode, perform a steady-state operation relay protection simulation using a simulation model of a power primary system, and obtain a first sub-result; in the case that the first side 2M channel switching device and the second side 2M channel switching device are both configured in the lossy switching mode, perform a steady-state operation relay protection simulation combined with a dynamic switching relay protection test using the simulation model of the power primary system, and obtain a second sub-result; in the case that the first side 2M channel switching device and the second side 2M channel switching device are both configured in the lossless switching mode, perform a steady-state operation relay protection simulation using the simulation model of the power primary system, and obtain a third sub-result; in the case that the first side 2M channel switching device and the second side 2M channel switching device are both configured in the lossless switching mode, perform a steady-state operation relay protection simulation combined with a dynamic switching relay protection test using the simulation model of the power primary system, and obtain a fourth sub-result; and determine a fourth result based on the first sub-result, the second sub-result, the third sub-result and the fourth sub-result; an evaluation module configured to, when any one of the first result, the second result, the third result and the fourth result is not passing, determine that the added first side 2M channel switching device and the second side 2M channel switching device are not adapted to the target relay protection system.

8. An electronic device, comprising: comprises: A processor, a memory, and a bus, the memory storing machine readable instructions executable by the processor, when the electronic device is running, the processor and the memory communicating through the bus, the machine readable instructions being executed by the processor to perform the steps of the method for determining the adaptability of a 2M channel switching device according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, A computer readable storage medium storing a computer program, the computer program being executed by a processor to perform the steps of the method for determining the adaptability of a 2M channel switching device according to any one of claims 1 to 6.

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