A test method for a high-temperature reactor steam turbine servo system

Abstract

The present invention provides a test method for a servo system of a high-temperature reactor steam turbine, comprising the following steps: performing jumper settings on the servo module; simultaneously, adjusting the DIP switch in the servo module to enable the valve position measuring device to output a first feedback voltage and a second feedback voltage; starting the steam turbine oil system to perform automatic zero adjustment of the valve position; taking a point every 10% within the 0-100% range of the valve position measuring device to perform consistency adjustment on the command voltage and feedback voltage of the valve, and the deviation between the valve command voltage and the feedback voltage recorded by the waveform recorder is less than 0.5 VDC; performing a step performance test of 0-100% or 100%-0. One technical effect of the present invention is that the design is reasonable. The valve position command and feedback are connected to the waveform recorder, and the system regulation performance can be more accurately judged by the recorded valve command and feedback waveforms, so as to obtain the optimal regulation performance.

Description

Technical Field

[0001] The invention belongs to the technical field of instrumentation and control debugging of nuclear power plants, and in particular relates to a test method for a high-temperature reactor steam turbine servo system. Background Art

[0002] The steam turbine regulation system of the demonstration project of the high-temperature gas-cooled reactor nuclear power plant includes a control system and an oil system. The control system adopts the DEH digital electro-hydraulic regulation system. The IO module 4 (NM461) of the control system is matched with the terminal module 5 (NM3461) to form a DEH servo unit. The servo unit cooperates with the servo valve 1 and the oil motor 2 to form a servo follow-up system of the given voltage and the oil motor stroke, so as to realize the control of the valve oil motor of the steam turbine 3. At the same time, the servo unit acts as a slave station and exchanges data with the main control unit of the DEH digital electro-hydraulic regulation system through the bus. The servo unit processes the difference between the given voltage (the given voltage 0-5VDC corresponds to the valve instruction 0-100%) issued by the main control unit 6 and the LVDT feedback voltage of the oil motor stroke through the P regulator, and after adding it to the output bias voltage, outputs the control signal to the servo valve. After the high-pressure oil passes through the servo valve, it drives the oil motor to reciprocate, thereby driving the steam turbine valve to move. See the control principle diagram. Figure 2 , the control system and the oil motor connection diagram is as follows Figure 3 During system debugging, the servo system needs to be parameter adjusted and function verified, mainly the servo module jumper settings, P regulator and bias voltage ZERO settings to ensure the servo system's quick response and accuracy.

[0003] Different from the common IO modules and terminal modules of DCS, the IO module NM461 and terminal module NM3461 of DEH not only have the functions of common IO modules and terminal modules, but also are responsible for signal processing and calculation, and complete information exchange with the main control unit. At the same time, it is also a microcontroller, realizing the modulation and demodulation of LVDT feedback voltage, the zero-position amplitude setting calculation of LVDT feedback voltage, the steam turbine valve position adjustment, the manual and automatic non-disturbance switching and other functions. When the input deviation of the P regulator (the command and feedback deviation of the valve) is greater than 0.5VDC, the servo card transmits the deviation alarm signal to the main control to participate in logic control and alarm. Before the unit is connected to the grid, during the process of locking or valve switching, the valve moves very quickly, and the servo system adjustment performance is not high, which can easily trigger the 0.5VDC deviation alarm and cause the machine to trip.

[0004] The control system is a cascade control loop. The outer loop is the speed PID (or pressure control PID) of the master station. The inner control loop is implemented by a hard loop. The controller is the P regulator of the servo module. The command of the servo valve is the sum of the P regulator output and the ZERO bias voltage. The bias voltage defaults to 0 and generally does not need to be adjusted. Figure 1Since the servo unit controller has a cycle of 20 ms, the DEH controller has a cycle of 50 ms, the real-time trend data in the DEH operator online screen has a cycle of 500 ms, and the historical trend data has a minimum cycle of 1 s. During the debugging process, the common practice is to use the real-time trend graph to analyze whether the P parameter of the inner loop meets the control requirements. Since the trend data comes from the computing server (500 ms), and the data scanning cycles of the computing server, DEH controller, and servo card are different, the trend data can reflect the deviation between the valve command and feedback under steady state, but cannot reflect the deviation between the valve command and feedback at any moment during the dynamic process. The test results will be partially distorted, leading to repeated tests, affecting the progress of the test, and also affecting the acceptance of the test results. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art, and provides a new technical solution for a test method of a high-temperature gas-cooled reactor steam turbine servo system.

[0006] According to one aspect of the present invention, there is provided a test method for a high-temperature gas-cooled reactor steam turbine servo system, including the following steps:

[0007] Step S100, perform jumper settings on the servo module; at the same time, adjust the DIP switch in the servo module so that the valve position measuring device outputs a first feedback voltage and a second feedback voltage; wherein, the second feedback voltage is the maximum value, and the first feedback voltage meets the voltage requirements for valve position setting of the valve.

[0008] Step S200, start the steam turbine oil system, perform automatic zero adjustment of the valve position, so as to determine the correspondence between the fully closed position of the 1# main steam valve, the zero voltage of the valve position measuring device, and the valve command of 0%, and determine the correspondence between the fully open position of the valve, the full voltage of the valve position measuring device, and the valve command of 100%.

[0009] Step S300, take a point every 10% within the 0-100% range of the valve position measuring device, and perform consistency adjustment on the command voltage and feedback voltage of the valve until all points meet the requirement that the deviation between the valve command voltage and the feedback voltage is less than 1%, and the deviation between the valve command voltage and the feedback voltage recorded by the waveform recorder is less than 0.5 VDC.

[0010] Step S400, perform a step performance test of 0-100% or 100%-0, so that the valve is fully opened to fully closed or fully closed to fully opened, and verify whether the adjustment of the servo module during the rapid action of the valve meets the requirements that the deviation between the valve command voltage and the feedback voltage is less than 0.5 VDC and the deviation between the valve command voltage and the feedback voltage is less than 1%.

[0011] Optionally, performing jumper settings on the servo module includes:

[0012] Short-circuit JP3 to enable the servo module to switch without an external device source;

[0013] Short-circuit JP4 to enable the proportional function; disconnect JP10 to disable the integral function;

[0014] Short-circuit JP11, disconnect JP12 and JP13, and set the control system command output type to constant voltage output.

[0015] Optionally, adjust the DIP switch in the servo module to make the valve position measuring device output a first feedback voltage and a second feedback voltage, including:

[0016] Adjust the DIP switch 1-4 in the servo module to make the valve position measuring device output a second feedback voltage;

[0017] Adjust the DIP switch 5-8 in the servo module. When the valve is fully closed, the first feedback voltage is 0.2V - 1.5V; when the valve is fully open, the first feedback voltage is 3.5V - 4.8V.

[0018] Optionally, when adjusting the DIP switch 1-4 in the servo module, the second feedback voltage is 7 - 8V.

[0019] Optionally, start the turbine oil system to automatically zero the valve position of the valve, so as to determine the corresponding relationship between the fully closed position of the valve, the zero voltage of the valve position measuring device, and the valve command 0%, and to determine the corresponding relationship between the fully open position of the valve, the full voltage of the valve position measuring device, and the valve command 100%, including:

[0020] Start the turbine oil system. After the oil system runs normally, first, on the DEH valve tuning screen, turn on the zeroing amplitude permission button and the 1# main steam valve automatic tuning button. The upper computer automatically outputs a valve position command of 0 - 100%. The oil motor moves to the fully closed position and the fully open position. The servo module automatically finds the fully closed position and the fully open position voltages of the valve position measuring device and corrects the given voltage value; after the tuning is completed, the tuning button automatically exits. The corresponding relationship between the fully closed position of the 1# main steam valve, the zero voltage of the valve position measuring device, and the valve command 0% is determined, and the corresponding relationship between the fully open position of the valve, the full voltage of the valve position measuring device, and the valve command 100% is determined;

[0021] Secondly, on the DEH valve tuning screen, turn on the 1# main steam valve maintenance switch, set the set value of the secondary loop controller to the internal given mode, and manually output the valve command.

[0022] Optionally, connect the command voltage and feedback voltage signals of the valve to a waveform recorder.

[0023] Optionally, use the first multimeter and the second multimeter to measure the feedback voltage and the command voltage of the servo module simultaneously.

[0024] Optionally, adjust the P regulator so that the feedback voltage and the command voltage are equal;

[0025] Meanwhile, observe the valve position feedback value on the DEH main screen, confirm that the valve position feedback value of the upper computer is correct, and the deviation from the command is less than 1%.

[0026] Optionally, when the manual output valve command is 10%, after the valve action is completed, if the deviation between the 10% command and the feedback is less than 1% and the oscillograph shows that the deviation between the valve command voltage and the feedback voltage is less than 0.5 VDC during the process of the valve opening from 0 to 10%, then the P value does not need to be adjusted at the 10% point; then, continue to adjust the 20 - 100% points, otherwise start the adjustment from zero again.

[0027] Optionally, for the dynamic verification of the consistency between the valve position command and the feedback of the 1# main steam valve, manually output a valve command of 0% to fully close the 1# main steam valve, maintain the maintenance rate greater than or equal to 1000% / min, manually output a valve command of 100%, make a step change of the valve command output from 0 - 100%, fully open the valve, and simultaneously record the change process of the valve command signal and the feedback signal with an oscillograph. The deviation between the valve command voltage and the feedback voltage being less than 0.5 VDC is qualified;

[0028] If the deviation between the command voltage and the feedback voltage is greater than 0.5 VDC during the valve opening process, it will trigger a large deviation alarm and upload it to the DEH controller; at this time, the valve needs to be fully closed, adjust the bias voltage ZERO so that the command voltage and the feedback voltage are consistent when the valve is fully closed, and re - perform the step performance verification from 0 - 100% or 100% - 0 until the deviation between the valve command voltage and the feedback voltage is less than 0.5 VDC during the rapid valve action process.

[0029] One technical effect of the present invention is:

[0030] In the embodiment of the present application, the test method of the high - temperature gas - cooled reactor steam turbine servo system can effectively verify whether the function of the servo module is normal, improve the accuracy and rapidity of the adjustment performance of the servo control system. By using an oscillograph for waveform analysis, it overcomes the problem of partial distortion of the results caused by the different periods of the trend in the DEH operator online screen, the DEH controller, and the servo controller. At the same time, it improves the adjustment accuracy of each step, reduces the number of repeated adjustments, and also lays a foundation for the debugging of the entire cascade control system.

[0031] In addition, during the subsequent operation of the steam turbine with load, when abnormal valve opening and closing occur, it can quickly and effectively detect and solve problems in the steam turbine control system, reducing the unit shutdown time. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic flow chart of a test method for a high - temperature gas - cooled reactor steam turbine servo system according to an embodiment of the present invention;

[0033] Figure 2 is the control schematic diagram of a steam turbine;

[0034] Figure 3 is the schematic diagram of the connection between the control system and the oil actuator;

[0035] Figure 4 is the wiring diagram recorded by a waveform recorder for a test method of a high-temperature reactor steam turbine servo system according to an embodiment of the present invention.

[0036] In the figure: 1, servo valve; 2, oil actuator; 3, steam turbine; 4, IO module; 5, terminal module; 6, main control unit; 7, servo module; 8, waveform recorder; 9, first multimeter; 10, second multimeter; 11, third multimeter. Detailed implementation manners

[0037] Now, various exemplary embodiments of the present application will be described in detail with reference to the accompanying drawings. It should be noted that: Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present application.

[0038] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present application and should not be construed as limiting the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0039] See Figures 1 to 4 , the embodiment of the present application provides a test method for a high-temperature reactor steam turbine servo system, which is used to test the high-temperature reactor steam turbine servo system to ensure the accuracy of the operation of the high-temperature reactor steam turbine servo system.

[0040] It should be noted that the real-time trend data in the DEH operator screen can judge whether the deviation between the command voltage and the feedback voltage meets the 1% requirement when the valve is at a certain opening. However, when the valve is in the process of movement, due to different scanning cycles, the valve feedback in the trend data at the same moment lags behind the actual valve feedback. The feedback voltage of the servo card can better represent the actual valve position of the valve. Connect the command voltage and the feedback voltage of the servo card of the servo module to the waveform recorder to record in real time the situation of the valve feedback tracking the command during the valve movement, so that the servo controller can obtain more accurate performance. Taking the commissioning of the 1# main steam valve servo system as an example, it is necessary to start the lubricating oil pump and the EH oil pump so that after the control system issues a command, the actuator (oil actuator) can operate normally and feedback the actual valve position of the valve.

[0041] Specifically, the test method for the high-temperature reactor steam turbine servo system includes the following steps:

[0042] Step S100: Perform jumper settings on the servo module 7. At the same time, adjust the DIP switch inside the servo module to make the valve position measuring device output a first feedback voltage and a second feedback voltage. Among them, the second feedback voltage is the maximum value, and the first feedback voltage meets the voltage requirements for valve position setting of the valve.

[0043] It should be noted that the servo module receives two sets of valve feedbacks, the first feedback voltage and the second feedback voltage. After modulating and demodulating them, it outputs the LVDT feedback voltage, and outputs the smaller value as the valve position feedback voltage corresponding to the valve. However, each valve of the demonstration project steam turbine is only equipped with one set of valve position measuring devices. In view of this situation, it is necessary to adjust the DIP switches 1-4 inside the servo module NM3461 to set the output voltage amplitude of the second feedback voltage after modulation and demodulation to about 7.5 VDC (the maximum value of the LVDT voltage). In this way, the valve position feedback received by the DEH main control unit is the valve position measured by the on-site LVDT valve position measuring device.

[0044] Step S200: Start the steam turbine oil system and perform automatic zero adjustment of the valve position to determine the correspondence between the fully closed position of the 1# main steam valve, the zero voltage of the valve position measuring device, and the valve command of 0%. Also, determine the correspondence between the fully open position of the valve, the full-scale voltage of the valve position measuring device, and the valve command of 100%.

[0045] Step S300: Take a point every 10% within the 0-100% range of the valve position measuring device, and perform consistency adjustment on the command voltage and feedback voltage of the valve until the deviation between the command voltage and feedback voltage of the valve at all points meets the requirement that the deviation is less than 1%, and the deviation between the command voltage and feedback voltage of the valve recorded by the waveform recorder 8 is less than 0.5 VDC.

[0046] Step S400: Perform a step performance test from 0-100% or 100%-0 to fully open or fully close the valve, and verify whether the adjustment of the servo module during the rapid valve movement meets the requirements that the deviation between the command voltage and feedback voltage of the valve is less than 0.5 VDC and the deviation between the command voltage and feedback voltage of the valve is less than 1%.

[0047] In the embodiment of the present application, the test method of the high-temperature reactor steam turbine servo system can effectively verify whether the functions of the servo module are normal, and improve the accuracy and rapidity of the regulation performance of the servo control system. By using a waveform recorder for wave recording and analysis, it overcomes the problem of partial distortion of the results caused by the different periods of the trend in the DEH operator online screen, the DEH controller, and the servo controller. At the same time, it improves the adjustment accuracy of each step, reduces the number of repeated adjustments, and also lays a foundation for the debugging of the entire cascade control system.

[0048] In addition, during the subsequent load operation of the steam turbine, when abnormal valve opening and closing occur, it can quickly and effectively detect and solve problems in the steam turbine control system, reducing the unit shutdown time.

[0049] Optionally, jumper settings are performed on the servo module, including:

[0050] Since the set value of the inner loop controller comes from the valve position set value transmitted from the upper computer and there is no external device source switching, short-circuit JP3;

[0051] For the DEH control system, the proportional control of the secondary loop can meet the system performance. Short-circuit JP4 to enable the proportional function; disconnect JP10 to shield the integral function;

[0052] Because the command signal range received by the servo valve is -40mA to 40mA, short-circuit JP11, disconnect JP12 and JP13, and set the control system command output type to constant voltage output.

[0053] In the above embodiment, the basic settings of the servo module are realized by performing jumper settings on the servo module, and the operation method is simple.

[0054] Optionally, the DIP switches in the servo module are adjusted so that the valve position measuring device outputs a first feedback voltage and a second feedback voltage, including:

[0055] Adjust the DIP switches 1-4 in the servo module so that the valve position measuring device outputs a second feedback voltage;

[0056] Adjust the DIP switches 5-8 in the servo module. When the valve is fully closed, the first feedback voltage is 0.2V to 1.5V; when the valve is fully open, the first feedback voltage is 3.5V to 4.8V.

[0057] By adjusting each DIP switch, the actual parameters of the first feedback voltage and the second feedback voltage are adjusted, so as to meet the accuracy of the feedback voltage.

[0058] Optionally, when adjusting the DIP switches 1-4 in the servo module, the second feedback voltage is 7 to 8V. By setting the second feedback voltage, the first feedback voltage is the valve position feedback voltage corresponding to the valve.

[0059] Optionally, start the turbine oil system to automatically zero the valve position of the valve, so as to determine the corresponding relationship among the fully closed position of the valve, the zero voltage of the valve position measuring device, and the valve command of 0%, and determine the corresponding relationship among the fully open position of the valve, the full voltage of the valve position measuring device, and the valve command of 100%. This includes:

[0060] Start the turbine oil system. After the oil system operates normally, first, on the DEH valve setting screen, turn on the zero amplitude adjustment permission button and the automatic setting button for the 1# main steam valve. The upper computer automatically outputs a valve position command of 0 - 100%. The oil motor moves to the fully closed position and the fully open position, and the servo module automatically finds the fully closed position and the full voltage of the fully open position of the valve position measuring device, and corrects the given voltage value. After the setting is completed, the setting button automatically exits. The corresponding relationship among the fully closed position of the 1# main steam valve, the zero voltage of the valve position measuring device, and the valve command of 0% is determined, and the corresponding relationship among the fully open position of the valve, the full voltage of the valve position measuring device, and the valve command of 100% is determined;

[0061] Secondly, on the DEH valve setting screen, turn on the maintenance switch of the 1# main steam valve, set the set value of the sub-loop controller to the internal given mode, and realize the manual output of the valve command.

[0062] In the above embodiment, through the automatic zero amplitude adjustment of the valve position of the valve, the corresponding relationship among the fully closed position of the valve, the zero voltage of the valve position measuring device, and the valve command of 0% is determined, and the corresponding relationship among the fully open position of the valve, the full voltage of the valve position measuring device, and the valve command of 100% is determined, thereby ensuring the one-to-one correspondence among the valve position of the valve, the feedback voltage of the valve position measuring device, and the valve command voltage, and ensuring the accuracy of the automatic zero amplitude adjustment of the valve position of the valve.

[0063] By adjusting the adjustment performance of the servo module, during the valve action process, the oil motor can accurately and quickly respond to the valve command, and the valve position measuring device can also accurately feedback the valve stroke.

[0064] Optionally, connect the command voltage and feedback voltage signals of the valve to a waveform recorder. Through the waveform recorder, the deviation between the valve command voltage and the feedback voltage during the process of the valve opening from 0 to 100% can be accurately obtained.

[0065] Optionally, use the first multimeter 9 and the second multimeter 10 to simultaneously measure the feedback voltage and the command voltage of the servo module. Through the first multimeter and the second multimeter, the feedback voltage and the command voltage of the servo module can be measured simultaneously and accurately.

[0066] It should be noted that the command output voltage of the servo valve is measured by the third multimeter 11.

[0067] Optionally, adjust the P regulator to make the feedback voltage and the command voltage equal;

[0068] Meanwhile, observe the valve position feedback value on the main DEH screen, confirm that the valve position feedback value of the upper computer is correct, and the deviation from the command is less than 1%. Judging whether the deviation between the command voltage and the feedback voltage meets 1% is carried out under steady state, so it is reliable to assist in comparison with the data of the real-time trend on the DEH screen.

[0069] Optionally, when manually outputting a valve command of 10%, after the valve action ends, if the deviation between the 10% command and the feedback is less than 1% and the waveform recorder shows that the deviation between the valve command voltage and the feedback voltage is less than 0.5 VDC during the process of the valve opening from 0 to 10%, then the P value does not need to be adjusted at the 10% point; then, continue to adjust the points from 20% to 100%, otherwise start the adjustment from zero again.

[0070] It should be noted that there is only one P regulator, and it is not necessary to adjust the P regulator for each point. However, if the 50% point is adjusted, the adjustment from 0 to 40% may become invalid and needs to be adjusted again.

[0071] In the above embodiment, by adjusting the P regulator, the valve position of the valve, the feedback voltage of the valve position measuring device, and the valve command voltage are kept consistent.

[0072] Optionally, for the dynamic verification of the consistency between the valve position command and the feedback of the 1# main steam valve, manually output a valve command of 0% to fully close the 1# main steam valve, keep the maintenance rate greater than or equal to 1000% / min, manually output a valve command of 100%, make a step change of the valve command output from 0 to 100%, fully open the valve, and at the same time use a waveform recorder to record the change process of the valve command signal and the feedback signal. The deviation between the valve command voltage and the feedback voltage less than 0.5 VDC is qualified;

[0073] If the deviation between the command voltage and the feedback voltage is greater than 0.5 VDC during the valve opening process, it will trigger a large deviation alarm and upload it to the DEH controller; at this time, the valve needs to be fully closed, adjust the bias voltage ZERO so that the command voltage and the feedback voltage are consistent when the valve is fully closed, and re-perform the step performance verification from 0 to 100% or from 100% to 0 until the deviation between the valve command voltage and the feedback voltage during the rapid valve action process is less than 0.5 VDC.

[0074] In the above embodiment, through the dynamic verification of the consistency between the valve position command and the feedback of the 1# main steam valve, it helps to ensure the accuracy of the test of the high-temperature reactor steam turbine servo system.

[0075] Therefore, the test method of the high-temperature reactor steam turbine servo system can more accurately judge whether the system regulation performance meets the requirements through the recorded valve command and feedback waveforms, so as to obtain the optimal regulation performance.

[0076] It is understandable that the above embodiments are merely exemplary embodiments adopted to illustrate the principles of the present invention. However, the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims

1. A test method for a servo system of a high-temperature reactor steam turbine, characterized in that, It includes the following steps: Step S100: Conduct jumper settings for the servo module; meanwhile, adjust the DIP switch in the servo module to make the valve position measuring device output a first feedback voltage and a second feedback voltage; wherein, the second feedback voltage is the maximum value, and the first feedback voltage meets the voltage requirement for valve position setting of the valve. Adjusting the DIP switch in the servo module to make the valve position measuring device output a first feedback voltage and a second feedback voltage includes: Adjust the DIP switches 1 - 4 in the servo module to make the valve position measuring device output the second feedback voltage. Adjust the DIP switches 5 - 8 in the servo module. When the valve is fully closed, the first feedback voltage is 0.2V - 1.5V; when the valve is fully open, the first feedback voltage is 3.5V - 4.8V. Step S200: Start the turbine oil system and perform automatic zero - amplitude adjustment of the valve position to determine the corresponding relationship among the fully - closed position of the 1# main steam valve, the zero - position voltage of the valve position measuring device, and the valve command of 0%; and determine the corresponding relationship among the fully - open position of the valve, the full - position voltage of the valve position measuring device, and the valve command of 100%. Step S300: Take a point every 10% within the 0 - 100% range of the valve position measuring device, and perform consistency adjustment on the command voltage and feedback voltage of the valve until the deviation between the command voltage and feedback voltage of the valve at all points meets the requirement that the deviation is less than 1%, and the deviation between the command voltage and feedback voltage recorded by the waveform recorder is less than 0.5VDC. Step S400: Conduct a step - response performance test from 0 - 100% or 100% - 0 to make the valve move from fully open to fully closed or from fully closed to fully open, and verify whether the adjustment of the servo module during the rapid movement of the valve meets the requirements that the deviation between the command voltage and feedback voltage of the valve is less than 0.5VDC and the deviation between the command voltage and feedback voltage of the valve is less than 1%.

2. The test method for the high-temperature reactor steam turbine servo system according to claim 1, characterized in that When adjusting the DIP switches 1 - 4 in the servo module, the second feedback voltage is 7 - 8V.

3. The test method of the high-temperature reactor steam turbine servo system according to claim 2, characterized in that Starting the turbine oil system and performing automatic zero - amplitude adjustment of the valve position to determine the corresponding relationship among the fully - closed position of the valve, the zero - position voltage of the valve position measuring device, and the valve command of 0%; and determine the corresponding relationship among the fully - open position of the valve, the full - position voltage of the valve position measuring device, and the valve command of 100% includes: Start the turbine oil system. After the oil system operates normally, first, on the DEH valve setting screen, turn on the zero - amplitude adjustment permission button and the 1# main steam valve automatic setting button. The upper computer automatically outputs a valve position command of 0 - 100%. The oil motor moves to the fully - closed position and the fully - open position. The servo module automatically searches for the fully - closed position and fully - open position voltages of the valve position measuring device and corrects the given voltage value. After the setting is completed, the setting button automatically exits. The corresponding relationship among the fully - closed position of the 1# main steam valve, the zero - position voltage of the valve position measuring device, and the valve command of 0% is determined, and the corresponding relationship among the fully - open position of the valve, the full - position voltage of the valve position measuring device, and the valve command of 100% is determined. Secondly, on the DEH valve setting screen, turn on the 1# main steam valve maintenance switch and set the set value of the secondary loop controller to the internal - given mode to achieve manual output of the valve command.

4. The test method for the high-temperature reactor steam turbine servo system according to claim 3, characterized in that, Connect the command voltage and feedback voltage signals of the valve to the waveform recorder.

5. The test method of the high-temperature reactor steam turbine servo system according to claim 4, characterized in that, Measure the feedback voltage and command voltage of the servo module simultaneously using the first multimeter and the second multimeter.

6. The test method of the high-temperature reactor steam turbine servo system according to claim 5, characterized in that Adjust the P regulator so that the feedback voltage and the command voltage are equal; Meanwhile, observe the valve position feedback value on the DEH main screen, confirm that the valve position feedback value of the upper computer is correct, and the deviation from the command is less than 1%.

7. The test method of the high-temperature reactor steam turbine servo system according to claim 6, characterized in that When manually outputting a valve command of 10%, after the valve action is completed, if the deviation between the 10% command and the feedback is less than 1% and the waveform recorder shows that the deviation between the valve command voltage and the feedback voltage is less than 0.5 VDC during the process of the valve opening from 0 to 10%, then the P value does not need to be adjusted at the 10% point; then, continue with the adjustment at the 20 - 100% points, otherwise start the adjustment from zero again.

8. The test method of the high-temperature reactor steam turbine servo system according to claim 7, characterized in that, Dynamic verification of the consistency between the valve position command and the feedback of the #1 main steam valve: Manually output a valve command of 0% to fully close the #1 main steam valve, maintain the maintenance rate at greater than or equal to 1000% / min, manually output a valve command of 100%, make a step change of the valve command output from 0 - 100%, fully open the valve, and simultaneously record the change process of the valve command signal and the feedback signal with a waveform recorder. The qualification requirement is that the deviation between the valve command voltage and the feedback voltage is less than 0.5 VDC; If the deviation between the command voltage and the feedback voltage is greater than 0.5 VDC during the valve opening process, a large deviation alarm will be triggered and uploaded to the DEH controller; at this time, the valve needs to be fully closed, adjust the bias voltage ZERO so that the command voltage and the feedback voltage are consistent when the valve is fully closed, and re - conduct the step performance verification from 0 - 100% or 100% - 0 until the deviation between the valve command voltage and the feedback voltage is less than 0.5 VDC during the rapid valve action process.

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