A method and system for automatically testing power protection devices for nuclear power plants

Abstract

The present invention relates to an automatic testing method and system for power protection devices for nuclear power plants, comprising: receiving a selection instruction, determining a test template of a protection device to be tested corresponding to the protection device to be tested; putting the protection device to be tested into operation; according to the test parameters, controlling a tester to send a test signal to the protection device to be tested, receiving a feedback signal of the protection device to be tested through the tester, and generating a test result of the protection device to be tested according to the feedback signal. After the present invention is implemented on site, it can realize selecting a corresponding test template for the protection device to be tested on site, automatically putting the corresponding protection device to be tested into operation after selecting the correct verification template, automatically controlling the tester to output a test signal, and automatically judging the test result, thereby greatly reducing the possibility of human error, reducing the manpower burden, and improving work efficiency.

Description

Technical Field

[0001] The invention relates to the field of power protection testing, and in particular to an automatic testing method and system for a power protection device in a nuclear power plant. Background Art

[0002] The power protection of nuclear power plants has various loads, which leads to various protection configurations. In addition, due to the large number of downstream loads, the protection verification time is long, the protection types are many, and the testing time is tight. The existing testing methods are to manually use relay protection testers to test the equipment, and manually switch the protection on and off. Since the configurations of the same type of interval protections are basically the same, the verification content and verification methods are repetitive work, which requires staff to repeat operations frequently, which is prone to human errors, resulting in verification failures or equipment damage.

[0003] According to the existing test methods, the output analog quantity of the relay protection tester needs to be manually calculated and manually input into the instrument, and then the output is confirmed. It is calculated once for each maintenance. If the calculation is wrong, it will affect the judgment of the correctness of the protection, which will greatly affect the work efficiency. In addition, the device response results need to be manually judged whether they are qualified, and the test report must be manually recorded. The existing protection devices share the same output contact. When each protection is calibrated, it is necessary to manually exit other protections to verify the accuracy of the protection calibration and the accuracy of the output. The operation process is complicated and there is a great risk of operational errors. According to the existing technology, the efficiency of the protection calibration work is closely related to the proficiency of the actual calibration personnel, so there is a great deal of uncertainty in the maintenance time. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an automatic testing method for a power protection device of a nuclear power plant.

[0005] The technical solution adopted by the present invention to solve the technical problem is: to provide an automatic testing method for a power protection device of a nuclear power plant, comprising:

[0006] S1. Receive a selection instruction and determine a test template of the protection to be tested corresponding to the protection device to be tested, wherein the test template includes test parameters;

[0007] S2, putting the protection to be tested into operation;

[0008] S3. According to the test parameters, control the tester to send a test signal to the protection device to be tested, wherein the test signal is used to trigger the protection device to be tested so as to activate the protection device to be tested;

[0009] S4. Receive a feedback signal from the protection device to be tested through the tester, and generate a test result of the protection device to be tested according to the feedback signal.

[0010] Preferably, the test template further includes: a wiring diagram of the protection device to be tested. Accordingly, after S1, the following steps are included:

[0011] S11. Output a reminder signal according to the wiring diagram of the protection device to be tested, wherein the reminder signal is used to remind an operator to correctly connect the wires.

[0012] Preferably, after S11, the steps include:

[0013] S12, collecting electrical parameters of the protection device to be tested;

[0014] Correspondingly, the test template also includes a test simulation calculation formula corresponding to the protection to be tested, the test parameters include a fixed value of the protection to be tested, and S3 includes:

[0015] S31, calculating the test analog quantity of the protection to be tested based on the test analog quantity calculation formula according to the set value of the protection to be tested and the electrical parameter;

[0016] S32, controlling the tester to output a corresponding test signal to the protection device to be tested according to the test analog quantity.

[0017] Preferably, after S11, the steps include:

[0018] S12, collecting electrical parameters of the protection device to be tested;

[0019] Correspondingly, the test template further includes a qualified threshold calculation formula corresponding to the protection to be tested, the test parameter includes a fixed value of the protection to be tested, and the test result of the protection to be tested generated according to the feedback signal in S4 includes:

[0020] S41, calculating the qualified threshold of the protection to be tested based on the qualified threshold calculation formula according to the fixed value of the protection to be tested and the electrical parameter;

[0021] S42: judging whether the test of the protection under test is qualified according to the relationship between the feedback signal and the qualified threshold, and generating the test result.

[0022] Preferably, the protection device to be tested includes: a motor thermal overload protection device, and the protection includes: a motor thermal overload protection. Accordingly, S3 includes:

[0023] S311, calculating a test simulation value of the motor thermal overload protection according to the set value of the motor thermal overload protection and the electrical parameters;

[0024] S312, controlling the tester to output a corresponding test signal to the motor thermal overload protection device according to the test simulation value of the motor thermal overload protection.

[0025] Preferably, step S3 is performed repeatedly for a preset number of times, wherein after each execution of step S3, the motor thermal overload protection is exited after receiving a corresponding feedback signal, and then the motor thermal overload protection is re-engaged to execute the next step S3;

[0026] The test result of the protection to be tested is generated according to all feedback signals.

[0027] Preferably, in said S2, before putting into operation the protection to be tested, the step further includes: exiting all protections in the protection device to be tested.

[0028] The present invention also constructs an automatic testing system for a power protection device for a nuclear power plant. The testing system comprises a host computer, and the host computer is used to execute any of the automatic testing methods for a power protection device for a nuclear power plant described above.

[0029] Preferably, the test system further comprises a tester, the host computer is respectively connected to the tester and the protection device to be tested, and the tester is connected to the protection device to be tested.

[0030] Preferably, the tester comprises an Omicron relay protection tester.

[0031] The implementation of the present invention has the following beneficial effects: after the present invention is implemented on site, it is possible to select a corresponding test template for the protection to be tested in the protection device to be tested on site; after selecting the correct test template, the corresponding protection to be tested is automatically put into operation, the tester is automatically controlled to output a test signal, and the test result is automatically judged, which greatly reduces the possibility of human error, reduces the manpower burden, and improves work efficiency.

[0032] Furthermore, the present invention can output a wiring prompt signal according to a preset template and a wiring diagram to prompt the operator to connect the wires correctly. After the operator has connected the wires, the test can be started by one key of the host computer, and a test report can be automatically generated, thus avoiding complex on-site calculations, avoiding damage to equipment due to manual output errors, reducing manpower burden, and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0034] Figure 1 It is a structural schematic diagram of an embodiment of an automatic testing system for power protection devices in a nuclear power plant according to the present invention;

[0035] Figure 2 It is a logical block diagram of a structural schematic diagram of an embodiment of an automatic testing system for power protection devices in a nuclear power plant according to the present invention. DETAILED DESCRIPTION

[0036] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In the following description, specific details such as specific system structures and technologies are proposed for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits and methods are omitted to prevent unnecessary details from hindering the description of the present invention.

[0037] Figure 1 It is a structural schematic diagram of an automatic test system for a power protection device for a nuclear power plant of the present invention. The test system includes a host computer, and the host computer is used to execute the automatic test method for a power protection device for a nuclear power plant of the present invention. The test system also includes a tester, and the host computer is respectively connected to the tester and the protection device to be tested, and the tester is connected to the protection device to be tested. A first connection is established between the host computer and the protection device to be tested through a data line provided by the protection device to be tested, a second connection is established between the host computer and the tester through a network cable, and a third connection is established between the tester and the protection device to be tested through a signal transmission line provided by the tester.

[0038] The protection device is used to perform fault detection and protection control on the electrical equipment in the nuclear power plant. The protection device includes one or more protections. For example, the motor protection device may include different protections to be tested, such as long start-up time protection, two-stage overcurrent protection, overload protection, inverse time overcurrent protection, overheating protection, negative sequence overcurrent protection, zero sequence overcurrent protection, overvoltage protection, low voltage protection, etc. These protections ensure that the motor can work correctly and reliably under various working conditions, thereby ensuring the safe operation of the motor and extending its service life. These protections share the same interface to connect to the motor. When testing the protection device to be tested, they also share the same interface to connect to the host computer and the tester.

[0039] In this embodiment, after the host computer is connected to the protection device to be tested, the host computer can be used to activate and deactivate the protection in the protection device. These programs with activation and deactivation functions are stored in the host computer and are used to deactivate all protections before the protection verification, and then activate the protection to be verified before the verification begins. For example, if the overcurrent protection is to be verified, all protections are deactivated first, and then the overcurrent protection is activated separately. After the verification is completed, the overcurrent protection is deactivated.

[0040] After the host computer and the relay protection tester are connected, the host computer can be used to control the tester to output test signals, mainly analog signals (voltage, current, etc.), while monitoring the feedback signal of the protection device.

[0041] In a specific embodiment, the tester includes an Omicron relay protection tester or other testers. Taking the motor interval protection verification as an example, the operator turns on the computer and the Omicron relay protection tester, connects the computer, the tester, and the motor, turns on the host computer, selects the corresponding test template, connects according to the wiring diagram displayed in the test template, starts the test template, and starts testing. The first is sampling. Each sampling point will pop up a reminder to record data. After the sampling is completed, the system automatically exits all protections, and then which protection needs to be verified is put into that protection. After the verification is completed, it will exit again, and then continue to repeat the above input, verification, and exit operations until the test is completed. Among them, the verification of the negative sequence protection of the motor adopts an inverse time limit, and it is necessary to use different currents for testing three times. Before the test, the template setting automatically modifies the cooling time in the fixed value to about 5 seconds to save verification time. After the test is completed, the cooling time is automatically modified to the original value. The cooling time refers to the time after the protection device is activated, and it takes a period of time to act again. Adjusting the cooling time can speed up the test process because it can reduce the time waiting for the protection device to reset.

[0042] Implementation of the technical solution of this embodiment can realize one-key testing of various protections in the motor device, realize one-key testing of test protection, automatic output of test quantities, no need to frequently modify set values ​​during the test process, automatic evaluation of test results, and automatic generation of test reports, thus avoiding complex on-site calculations and avoiding damage to equipment due to manual output errors.

[0043] like Figure 2 As shown, in a first embodiment of a method for automatically testing a power protection device for a nuclear power plant according to the present invention, the following steps are included:

[0044] S1. Receive a selection instruction and determine a test template of the protection to be tested corresponding to the protection device to be tested, wherein the test template includes test parameters. In this step, it should be noted that the user needs to input a template selection instruction on the host computer according to the type of protection to be tested and select the corresponding test template. The host computer receives the template selection instruction issued by the user and retrieves the corresponding test template from the server or its own database.

[0045] In a test template file, the test functions and test items of the protection device to be tested can be pre-defined. For example, the motor protection device contains multiple protections to be tested. The protections to be tested correspond to the test templates one by one. Users can choose which protections to test by selecting different test templates. It can also be used to give testers necessary prompts, such as wiring prompts and test parameters. Test parameters refer to a series of variables and conditions set for testing specific protections, such as current values, voltage values, action time, return time, etc. The test template can also be upgraded and updated according to the test requirements of the protection device to be tested. For example, if the set value of the protection device to be tested changes, the corresponding test needs will also change. The test template can be upgraded according to the change of the set value to adapt to the test requirements of the protection device to be tested.

[0046] In a specific embodiment, the test template also includes: a wiring diagram of the protection device to be tested, and accordingly, S1 includes: S11, outputting a reminder signal according to the wiring diagram of the protection device to be tested, and the reminder signal is used to remind the operator to connect correctly. In this step, it should be noted that: after the test template is retrieved, the wiring diagram of the protection to be tested is displayed on the human-computer interaction interface, showing how the host computer and the tester are connected to the protection device to be tested, and outputting wiring prompt information, such as sound and eye-catching interface, to remind the operator to connect according to the wiring diagram. In addition, after the user completes the wiring, the host computer starts to perform steps such as sampling and sending test signals to test whether the wiring is correct, such as controlling the tester to send a signal of the test wiring function to the protection device to be tested, collecting the electrical parameters of the protection device to be tested through the data line, etc., to detect whether the user wiring is correct. If the sampling and sending of the test signal fail, it will be determined that the user wiring is wrong, and a wiring failure reminder signal is output on the human-computer interaction interface to remind the operator to check whether the wiring is wrong.

[0047] At the same time, the test template includes not only wiring diagrams, but also test parameters, technical specifications, debugging outlines, schematics, operating tips, safety precautions, etc., to help operators complete the test faster and more accurately.

[0048] S2. Put the protection to be tested into operation. In this step, it should be noted that when testing the protection to be tested, before putting the protection to be tested into operation, it also includes: exiting all protections in the protection device to be tested.

[0049] Specifically, the test template is provided with the corresponding protection input and output procedures, including the input procedure and the exit procedure. The input procedure is used to control the input of the protection. The exit procedure is used to exit the protection. Before the upper computer tests a certain protection, it reads the exit procedures of all protections in the protection device to be tested, and sends the exit protection instructions to the protection device to be tested in sequence through the first connection, so as to control all the protections in the protection device to be exited. After that, it reads the input procedure of the protection to be tested, and sends the instruction of inputting the protection to be tested directly to the protection device to be tested through the first connection, so as to control the protection device to be tested to input the protection to be tested.

[0050] The purpose of this operation is to ensure the accuracy and safety of the test. Since the various protections in the protection device share a terminal, in order to avoid the other protections affecting the test process, when testing a specific relay protection, exiting other protections can prevent them from accidentally operating during the test, resulting in inaccurate test results or unnecessary tripping. At the same time, ensure that the tested relay protection device is isolated from other parts of the system so that its performance can be evaluated separately.

[0051] S3. According to the test parameters, the tester is controlled to send a test signal to the protection device to be tested, wherein the test signal is used to trigger the protection to be tested so as to make the protection device to be tested operate. In this step, it should be noted that after the test template is run, the host computer can calculate the value of the analog quantity output by the tester through the preset calculation rules, and control the tester to output the corresponding test signal to the protection device to be tested. This is because the test analog quantity needs to be calculated in combination with the electrical parameters of the protection device to be tested collected on site and the fixed value of the protection to be tested, so it cannot be preset. The test signal is used to trigger the protection to be tested so that the protection to be tested produces the corresponding protection action.

[0052] S4. Receive the feedback signal of the protection device to be tested through the tester, and generate the test result of the protection device to be tested according to the feedback signal. In this step, it should be noted that during the test, the host computer will continuously monitor the action of the protection device to be tested through the tester, record the action time and action characteristics of the protection device to be tested, and record all key data during the test. After the test is completed, the host computer analyzes the test results to determine whether the protection device to be tested is correctly operated during the test.

[0053] Taking the overcurrent protection test as an example, the overcurrent protection will disconnect the circuit within the specified time because the operating current of the protection device to be tested exceeds the preset value. After the user completes the wiring and clicks to run the test template, the test template sends a command to the tester to output the set overcurrent value to the protection device to be tested according to the preset test parameters (including the expected overcurrent value, test duration, test mode, etc.). The tester outputs a certain value of current to the protection device to be tested according to the command of the test template, collects the action status of the protection device to be tested (including overcurrent value, action time, return time, etc.), and the host computer records the action time and action characteristics of the protection device to be tested. After the test is completed, the test results are analyzed to determine whether the protection device to be tested operates correctly under the set overcurrent value.

[0054] By implementing the technical solution of this embodiment, it is possible to select the corresponding test template for the protection to be tested in the on-site protection device to be tested. After selecting the correct test template, the corresponding protection to be tested is automatically activated, the tester is automatically controlled to output the test signal, and the test result is automatically judged, which greatly reduces the possibility of human error, reduces the manpower burden, and improves work efficiency.

[0055] In an optional embodiment, S11 includes the following steps: S12, collecting electrical parameters of the protection device to be tested. In this step, it should be noted that: the test template starts to run, reminding the operator to connect the wires. After the operator connects the wires, the test template is run through the host computer to control the tester to collect and record the electrical parameters of the protection device to be tested. The electrical parameters refer to the operating parameters of the protection device to be tested. The purpose of sampling the protection device to be tested is to ensure that the test conditions are consistent with the actual operating conditions. Generally, the electrical parameters include current transformer (TA) sampling values, voltage transformer (TV) sampling values, power sampling values, frequency sampling values, phase sampling values, fault recording sampling values, setting value sampling, action time sampling values, load sampling values, etc. These electrical parameters are indispensable for calculating the output signal of the tester and calculating the qualified threshold of the protection to be tested.

[0056] Accordingly, the test template also includes the test simulation calculation formula corresponding to the protection to be tested, and the test parameters include the set value of the protection to be tested. The set value refers to the trigger value of the relevant protection function in the relay protection device. These set values ​​need to be set according to the calculated set values ​​in the set value list and checked by another tester or the test leader. S3 includes:

[0057] S31. Calculate the test analog quantity of the protection to be tested based on the test analog quantity calculation formula according to the fixed value and electrical parameters of the protection to be tested. In this step, it should be noted that the test analog quantity calculation formula is used to calculate the analog quantity used for testing in combination with the fixed value and electrical parameter value of the protection to be tested. This may involve the calculation of parameters such as current, voltage, power, frequency, and phase.

[0058] S32, control the tester to output a corresponding test signal to the protection device under test according to the test analog quantity. In this step, it should be noted that a control command is sent to the tester according to the calculated analog quantity, and the tester sends a test signal corresponding to the calculated analog quantity to the protection device under test according to the received command, so as to activate the protection device under test.

[0059] Accordingly, the test template also includes a qualified threshold calculation formula corresponding to the protection to be tested, and the test parameters include the fixed value of the protection to be tested. The qualified threshold refers to the triggering condition (such as triggering current, triggering voltage), action time (how long after being triggered to produce action), return time (how long after the action returns to the initial state), etc. of the protection to be tested. The test results of the protection to be tested generated according to the feedback signal in S4 include:

[0060] S41. Calculate the qualified threshold of the protection to be tested based on the qualified threshold calculation formula according to the fixed value and electrical parameters of the protection to be tested. In this step, it should be noted that the qualified threshold calculation formula is used to calculate the qualified threshold of the protection device action in combination with the fixed value and electrical parameter value of the protection to be tested. This may involve the calculation of parameters such as current, voltage, power, frequency, and phase.

[0061] S42, judging whether the test of the protection to be tested is qualified according to the relationship between the feedback signal and the qualified threshold, and generating the test result. In this step, it should be noted that the feedback signal of the protection device is collected by the tester, and it is judged whether the feedback signal meets the calculated qualified threshold. If the feedback signal is within the qualified threshold, the protection to be tested operates correctly and the test result is judged to be qualified. Otherwise, the protection to be tested is judged to be unqualified. For example, it includes comparing whether the actual action time is consistent with the expected action time, whether the action characteristics meet the fixed value requirements, etc.

[0062] The technical solution implemented in this embodiment can solve the problems of "the analog quantity output by the tester needs to be manually calculated and manually input into the tester, and then the output is confirmed. It is calculated once for each test. If the calculation is wrong, it will affect the judgment of the correctness of the protection, greatly affecting the work efficiency" and "the qualified range of the protection test needs to be calculated manually, and whether the response result of the protection device to be tested is qualified needs to be judged manually". The formula for calculating the analog quantity and the formula for calculating the qualified threshold are compiled into the test template in advance, and the electrical signals are collected on-site. Combined with the set value list input by the user into the test template in advance, the set value of the protection to be tested and the electrical parameters of the on-site operation are called up, and the test analog quantity of the protection to be tested is calculated according to the preset analog quantity calculation formula, and the tester is automatically controlled to output the test analog quantity. The qualified range of the action of the protection device to be tested is calculated according to the preset analog quantity calculation formula, avoiding errors and mistakes that may be caused by manual repeated calculation and repeated input, effectively improving the efficiency and accuracy of the test, and reducing the experience requirements of the operator.

[0063] In a specific embodiment, the protection device to be tested includes: a motor, and the protection includes: motor thermal overload protection. Accordingly, S3 includes:

[0064] S311. Calculate the test simulation of the motor thermal overload protection according to the set value of the motor thermal overload protection and the electrical parameters. In this step, it should be noted that the test process of the motor thermal overload protection is a program specifically for evaluating the safety and reliability of the motor under overload conditions. The set value of the motor thermal overload protection has been written into the set value list in advance, and the test template can call the set value in the set value list. When compiling the corresponding test template, the test parameters, including the overload multiple and test time, have been set according to the rated current and thermal overload characteristics of the motor.

[0065] S312, control the tester to output a corresponding test signal to the motor thermal overload protection device according to the test simulation of the motor thermal overload protection. In this step, it should be noted that during the overload test, the tester will continuously monitor, record and feedback the motor's current, voltage, temperature, protection triggering time and other parameters. When the motor thermal overload protection device detects a thermal overload state, the thermal overload protection should be triggered to cut off the power supply to prevent damage to the motor.

[0066] Repeat step S3 for a preset number of times (for example, 3 times), wherein after each execution of step S3, the motor thermal overload protection is exited after receiving the corresponding feedback signal, and then the motor thermal overload protection is re-entered to execute the next step S3. Each time step S3 is executed, the upper computer controls the tester to transmit a different analog current value to the motor thermal overload protection device. This is because the upper computer calculates the analog current value according to the rated current of the motor and the set value of the thermal overload protection device through the calculation formula preset in the test template, and then sets a value lower than the analog current to simulate a low load state and a value higher than the analog current to simulate an overload state within a certain range. For other implementation schemes of the number of repetitions, please refer to the scheme of repeating 3 times. If the feedback signal does not exceed the corresponding qualified threshold each time, it is judged that the test result of the motor thermal overload protection is qualified. Repeated testing is to ensure that the motor protection device can work stably and reliably under various conditions. This includes testing under different load, temperature and voltage conditions to verify the accuracy and consistency of the protection device. The test template is pre-set to exit the protection after each test and then re-engage it to avoid affecting the next test result due to heat accumulation in the device.

[0067] By implementing the technical solution of this embodiment, the test of the thermal overload protection of the motor can be completed. The user only needs to run the pre-compiled test template to realize the automatic output of the test quantity of the thermal overload protection of the motor, the automatic evaluation of the test result, and the automatic generation of the test report. It avoids complex calculations on site and avoids damage to the equipment due to manual addition of output errors. It saves manpower and reduces the experience requirements for testers.

[0068] The following is an automatic test method for the power protection device of a nuclear power plant of the present invention, which is illustrated by taking the overcurrent protection of a motor as an example. The host computer retrieves the fixed values ​​stored in the test template, including: rated current 100A, protection device action current 110A, action time 3s, and recovery time 5s; the operating parameters of the motor collected by the host computer are: working current 90A; the analog quantity calculated by the host computer is: current 80-120A, step 1A, and each step lasts 3s; the qualified threshold value calculated by the host computer is: when the current is 105-115A, the protection device acts within 3s, and recovers within 5s after the current is withdrawn; the feedback signal and judgment result collected by the host computer through the tester are: if the analog current is 105A, the protection device acts within 3s, the circuit is disconnected, and the circuit is restored within the next 5s, then the test is judged to be qualified; if the analog current is 120A, the protection device does not act within 3s, and the test result is judged to be unqualified.

[0069] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the scope of the protection device of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the scope covered by the claims of the present invention.

Claims

1. A method for automatically testing a power protection device for a nuclear power plant, characterized in that: include: S1. Receive a selection instruction and determine a test template of the protection to be tested corresponding to the protection device to be tested, wherein the test template includes test parameters; S2, putting the protection to be tested into operation; S3. According to the test parameters, control the tester to send a test signal to the protection device to be tested, wherein the test signal is used to trigger the protection device to be tested so as to activate the protection device to be tested; S4. Receive a feedback signal from the protection device to be tested through the tester, and generate a test result of the protection device to be tested according to the feedback signal.

2. The automatic testing method for power protection device of a nuclear power plant according to claim 1 is characterized in that: The test template also includes: a wiring diagram of the protection device to be tested. Accordingly, after S1, it includes: S11. Output a reminder signal according to the wiring diagram of the protection device to be tested, wherein the reminder signal is used to remind an operator to correctly connect the wires.

3. The automatic testing method for power protection device of a nuclear power plant according to claim 2 is characterized in that: S11 and later include: S12, collecting electrical parameters of the protection device to be tested; Correspondingly, the test template also includes a test simulation calculation formula corresponding to the protection to be tested, the test parameters include a fixed value of the protection to be tested, and S3 includes: S31, calculating the test analog quantity of the protection to be tested based on the test analog quantity calculation formula according to the set value of the protection to be tested and the electrical parameter; S32, controlling the tester to output a corresponding test signal to the protection device to be tested according to the test analog quantity.

4. The automatic testing method for power protection device of a nuclear power plant according to claim 2 is characterized in that: S11 and later include: S12, collecting electrical parameters of the protection device to be tested; Correspondingly, the test template further includes a qualified threshold calculation formula corresponding to the protection to be tested, the test parameter includes a fixed value of the protection to be tested, and the test result of the protection to be tested generated according to the feedback signal in S4 includes: S41, calculating the qualified threshold of the protection to be tested based on the qualified threshold calculation formula according to the fixed value of the protection to be tested and the electrical parameter; S42: judging whether the test of the protection under test is qualified according to the relationship between the feedback signal and the qualified threshold, and generating the test result.

5. The automatic testing method for power protection device of a nuclear power plant according to claim 3 is characterized in that: The protection device to be tested includes: a motor thermal overload protection device, and the protection includes: motor thermal overload protection. Accordingly, S3 includes: S311, calculating a test simulation value of the motor thermal overload protection according to the set value of the motor thermal overload protection and the electrical parameters; S312, controlling the tester to output a corresponding test signal to the motor thermal overload protection device according to the test simulation value of the motor thermal overload protection.

6. The automatic testing method for power protection device of a nuclear power plant according to claim 5 is characterized in that: Repeat step S3 for a preset number of times, wherein after each execution of step S3, the motor thermal overload protection is exited after receiving a corresponding feedback signal, and then the motor thermal overload protection is re-engaged to execute the next step S3; The test result of the protection to be tested is generated according to all feedback signals.

7. The automatic testing method for power protection device of a nuclear power plant according to claim 1 is characterized in that: In the S2, before the protection to be tested is put into operation, the step further includes: exiting all protections in the protection device to be tested.

8. An automatic test system for power protection devices in a nuclear power plant, characterized in that: The test system comprises a host computer, and the host computer is used to execute the automatic test method of the power protection device of a nuclear power plant as described in any one of claims 1-7.

9. The automatic test system for power protection devices of a nuclear power plant according to claim 8, characterized in that: The test system further comprises a tester, the host computer is respectively connected to the tester and the protection device to be tested, and the tester is connected to the protection device to be tested.

10. The automatic test system for power protection devices of a nuclear power plant according to claim 9, characterized in that: The tester includes an Omicron relay protection tester.

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