Water-turbine generator set primary frequency modulation water test method and system based on automatic setting

Abstract

The invention discloses a water-turbine generator set primary frequency modulation water test method and system based on automatic setting, and belongs to the technical field of generator sets. The invention aims to solve the problems that in the prior art, misoperation is easily caused when a function generator is used for simulating a frequency signal, and a wrong step amount is manually input during a given step test of a guide vane. The method comprises the following steps: after verifying the precision of a frequency measurement loop, under the grid-connected operation of a unit, automatically triggering primary frequency modulation dead zone verification, an opening mode and power mode frequency step disturbance test, a guide vane given step test and automatic given frequency and opening change through a human-computer interface, and automatically collecting and analyzing data; fluctuation caused by manual misoperation is effectively avoided, the test efficiency and safety are improved, and stable operation of a unit is ensured; the method is mainly applied to primary frequency modulation performance optimization and recheck of the generator set, abnormal conditions in the test process are found and processed in time, the reliability and accuracy of the test are further improved, and a powerful guarantee is provided for efficient and safe operation of the generator set.

Description

Technical Field

[0001] The invention relates to the technical field of hydro-turbine generator sets in electric power engineering, and in particular to a primary frequency modulation water test method of a hydro-turbine generator set based on automatic setting. Background Art

[0002] In the power system, primary frequency regulation is an important function of the generator set to maintain the stable operation of the power grid. Primary frequency regulation refers to the ability of the generator set to automatically respond to changes in the frequency of the power grid when it is connected to the grid, and to adjust its output in time to maintain the fluctuation of the power grid frequency within the allowable range, thereby ensuring the stability and reliability of the power grid. According to relevant standards and management regulations, after the generator set undergoes transformation or overhaul, especially the transformation or overhaul of the speed regulation system and primary frequency regulation related equipment, and parameter changes, a series of performance verification tests, including primary frequency regulation waterless test and water test, are required to evaluate and optimize the primary frequency regulation performance of the unit. In addition, the unit needs to undergo a frequency regulation water test performance review every 5 years to ensure the stability and reliability of the unit in long-term operation.

[0003] At present, the primary frequency regulation water test mainly includes primary frequency regulation dead zone verification, guide vane given step test, opening mode and power mode frequency step disturbance test, etc. In the existing technical scheme, the test process usually follows the following steps: first, the signal to be collected (such as opening, power, PID, frequency difference, etc.) is connected to the signal acquisition equipment through the test terminal; then, the unit is turned on to the grid-connected state with a stable load, the speed control system is switched to the electric manual mode or the machine manual mode, the residual pressure machine frequency signal is released, and the function generator is used to simulate the machine frequency signal to connect to the speed control system, and then the system is switched back to the automatic mode; finally, by adjusting the output of the function generator, simulating the change of the grid frequency, and analyzing the data recorded by the signal acquisition equipment, it is necessary to check whether the parameters and regulation performance of the speed control system meet the standard requirements.

[0004] Although the existing technical solutions can meet the requirements of primary frequency modulation water test to a certain extent, there are still the following significant problems: 1. The operation is complicated and prone to errors: In the frequency modulation dead zone calibration, opening mode and power mode frequency step disturbance test, a function generator needs to be used to simulate the frequency signal change according to a certain step length; in this process, the test personnel need to operate frequently and concentrate highly. If they are not careful, they may send the wrong signal, resulting in a large fluctuation of the opening and power exceeding the limit, thus affecting the output and load curve requirements of the power station; 2. High risk of manual input: In the guide vane given step test, the tester needs to manually input the step value in the electric manual mode; in this process, there is a risk of incorrect input of the given value, which may cause the unit to shut down due to reverse power or overload in serious cases, posing a threat to the safe and stable operation of the unit and the power grid.

[0005] In summary, the existing primary frequency modulation water test technical solution has deficiencies in operational complexity, safety and reliability, and a more efficient, safe and reliable test method and process is urgently needed to replace it. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a method and system for testing the primary frequency modulation of a hydro-turbine generator set based on automatic setting, so as to solve the problems in the prior art of easy misoperation of the function generator to simulate the frequency signal and manual input of wrong step values ​​during the guide vane given step test.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: a water test method for primary frequency regulation of a hydro-generator set based on automatic setting, comprising the following steps: Step 1: During the primary frequency modulation waterless test, use a function generator to verify that the resolution and accuracy of the frequency measurement circuit meet the standard requirements, so that in the subsequent water test, program constants can be used to replace the external function generator to automatically simulate the unit frequency; Step 2: After the test unit is connected to the grid and running with a stable load, exit the automatic generation control AGC of the test unit, start the primary frequency regulation function, and select the primary frequency regulation test mode through the human-machine interface; Step 3: Start the frequency modulation dead zone check function through the human-machine interface. After the second confirmation, the data collection is automatically triggered. The frequency assignment module assigns the preset frequency value to the machine frequency variable in the positive and negative directions according to the set interval time. After the dead zone check is completed, the critical frequency value of the guide vane action is automatically calculated, and the parameter setting is checked until the action critical frequency value is normal; Step 4: Start the frequency step disturbance test function of the opening mode and power mode through the human-machine interface. After secondary confirmation, the data collection is automatically triggered. The frequency assignment module assigns the preset frequency value to the machine frequency variable in the positive and negative directions according to the set interval time. After completing the frequency step disturbance, the response lag time, rise time, and adjustment time are automatically calculated, and the parameters are adjusted according to the performance index requirements until the standard requirements are met; Step 5: Start the guide vane given step test function through the human-machine interface. After secondary confirmation, data collection is automatically triggered. The guide vane given assignment module assigns the guide vane given variable in the positive and reverse directions in turn with the preset step amount according to the set interval time. After completing the guide vane given step disturbance, the difference between the given and actual action amounts is automatically calculated, and the follow-up system parameters are adjusted as needed until the standard requirements are met.

[0008] In the preferred solution, the function generator in step 1 verifies that the resolution of the frequency measurement loop is no greater than 0.003 Hz and the frequency measurement accuracy is no less than 0.2‰, which meets the standard requirements.

[0009] In the preferred solution, the primary frequency modulation test mode in step 2 is used as an enabling condition for automatically setting the frequency and opening, and does not affect the primary frequency modulation parameters, structure, and performance of the speed regulation system.

[0010] In the preferred solution, after the data collection is automatically triggered in step 3, the frequency assignment module starts at 50 Hz, gradually increases to 50.06 Hz in the positive direction with a step size of 0.01 Hz, and then gradually decreases to 49.94 Hz in the reverse direction. According to the set interval time, the preset frequency values ​​are assigned to the machine frequency variables in the positive and reverse directions respectively to complete the dead zone verification.

[0011] In a preferred solution, the interval time set in step 3 is 2 seconds, and after smoothing the collected data curve, the critical frequency value of the guide vane when moving in the opening and closing directions is automatically calculated.

[0012] In the preferred scheme, the frequency step disturbance test function of the opening mode and the power mode is started in step 4, and the frequency assignment module assigns the machine frequency variable in turn with the preset frequency values ​​in the positive and reverse directions according to the set interval time. The frequency values ​​include 50.1Hz, 50.15Hz, 50.2Hz, 50.25Hz and 49.9Hz, 49.85Hz, 49.8Hz, 49.75Hz, and the set interval time is 30 seconds.

[0013] In the preferred scheme, the guide vane given step test function is started in step 5, and the guide vane given assignment module assigns the guide vane given variable in turn with preset step amounts in the positive and reverse directions according to the set interval time. The step amounts include assigning 1%, 2%, and 5% step amounts in the opening direction, and assigning the same step amounts in the closing direction, and the set interval time is 15 seconds.

[0014] A system for implementing any of the above-mentioned methods for testing primary frequency regulation of a hydro-turbine generator set based on automatic setting, comprising: a human-machine interface, a frequency assignment module, a data acquisition module and a data analysis module, wherein the human-machine interface is used to select and start the test mode, the frequency assignment module is used to automatically assign frequency values ​​to machine frequency variables according to preset step sizes and interval times, the data acquisition module is used to automatically collect test data, and the data analysis module is used to process data and calculate relevant performance indicators.

[0015] The method and system for testing the primary frequency regulation of a hydro-generator set based on automatic setting provided by the present invention have the following beneficial effects: 1. The present invention solves the problem in the prior art that a function generator is prone to misoperation when simulating a frequency signal and that an erroneous step amount is manually input during a guide vane given step test; 2. The present invention uses programmed control to replace traditional function generator simulation and manual input, thus avoiding the risk of human error operation; 3. The present invention verifies the resolution and accuracy of the frequency measurement circuit through a waterless test to ensure the accuracy of the frequency signal in a water test; 4. The present invention automatically triggers data collection during the test, performs smoothing on the data, and automatically calculates key performance indicators, thereby improving the efficiency and accuracy of the test; 5. The present invention solves the problem that when using a function generator to simulate a frequency signal, it is easy to cause a large fluctuation in opening or power due to misoperation; 6. The present invention solves the problem of unit shutdown caused by manual input of wrong step amount during guide vane given step test; 7. The present invention avoids reverse power or overload of the unit caused by human error operation, thus ensuring the safe and stable operation of the unit; 8. The automatic control and data acquisition of the present invention greatly saves test time, improves work efficiency and reduces work difficulty; 9. The present invention ensures the accuracy and reliability of the test results through high-precision frequency measurement circuit and automated data analysis; 10. The present invention realizes accurate simulation of frequency signals and automatic execution of given steps of guide vanes through automated control means, thereby effectively avoiding the risks caused by human misoperation and improving the accuracy, safety and efficiency of the test; 11. The technology of the present invention is not only applicable to the primary frequency regulation water test of the hydro-generator set, but also can provide reference and reference for the primary frequency regulation performance verification and optimization of other types of generator sets; 12. The present invention adopts modular design to make the system easy to expand and maintain, while providing a friendly human-computer interaction interface, simplifying the operation process, and enhancing the user experience, thus contributing a new technical solution to the innovative development of the power industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings and implementation examples: Figure 1 It is the primary frequency modulation water test process of the prior art; Figure 2 This is the dead zone verification process of the primary frequency modulation water test of the present invention; Figure 3 This is the frequency step disturbance test process of the primary frequency modulation water test opening mode and power mode of the present invention; Figure 4 A step test process is given for the primary frequency modulation water test guide vane of the present invention. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments: Example 1 like Figures 1 to 4 As shown, the primary frequency regulation water test method of the hydro-generator set based on automatic setting includes the following steps: Step 1: During the primary frequency modulation waterless test, use a function generator to verify that the resolution and accuracy of the frequency measurement circuit meet the standard requirements, so that in the subsequent water test, program constants can be used to replace the external function generator to automatically simulate the unit frequency; Step 2: After the test unit is connected to the grid and running with a stable load, exit the automatic generation control AGC of the test unit, start the primary frequency regulation function, and select the primary frequency regulation test mode through the human-machine interface; Step 3: Start the frequency modulation dead zone check function through the human-machine interface. After the second confirmation, the data collection is automatically triggered. The frequency assignment module assigns the preset frequency value to the machine frequency variable in the positive and negative directions according to the set interval time. After the dead zone check is completed, the critical frequency value of the guide vane action is automatically calculated, and the parameter setting is checked until the action critical frequency value is normal; Step 4: Start the frequency step disturbance test function of the opening mode and power mode through the human-machine interface. After secondary confirmation, the data collection is automatically triggered. The frequency assignment module assigns the preset frequency value to the machine frequency variable in the positive and negative directions according to the set interval time. After completing the frequency step disturbance, the response lag time, rise time, and adjustment time are automatically calculated, and the parameters are adjusted according to the performance index requirements until the standard requirements are met; Step 5: Start the guide vane given step test function through the human-machine interface. After secondary confirmation, data collection is automatically triggered. The guide vane given assignment module assigns the guide vane given variable in the positive and reverse directions in turn with the preset step amount according to the set interval time. After completing the guide vane given step disturbance, the difference between the given and actual action amounts is automatically calculated, and the follow-up system parameters are adjusted as needed until the standard requirements are met.

[0018] In this embodiment, the function generator in step 1 verifies that the resolution of the frequency measurement loop is no greater than 0.003 Hz and the frequency measurement accuracy is no less than 0.2‰, which meets the standard requirements.

[0019] Furthermore, the primary frequency modulation test mode in step 2 serves as an enabling condition for automatically setting the frequency and opening, and does not affect the primary frequency modulation parameters, structure, and performance of the speed regulation system.

[0020] Furthermore, after the data collection is automatically triggered in step 3, the frequency assignment module starts at 50 Hz, gradually increases to 50.06 Hz in the positive direction with a step size of 0.01 Hz, and then gradually decreases to 49.94 Hz in the reverse direction. According to the set interval time, the preset frequency values ​​are assigned to the machine frequency variables in the positive and reverse directions respectively to complete the dead zone verification.

[0021] Furthermore, the interval time set in step 3 is 2 seconds, and after smoothing the collected data curve, the critical frequency value of the guide vane when it moves in the opening and closing directions is automatically calculated.

[0022] Furthermore, in step 4, the frequency step disturbance test function of the opening mode and the power mode is started. The frequency assignment module assigns the machine frequency variable with the preset frequency values ​​in the positive and reverse directions according to the set interval time. The frequency values ​​include 50.1Hz, 50.15Hz, 50.2Hz, 50.25Hz and 49.9Hz, 49.85Hz, 49.8Hz, 49.75Hz, and the set interval time is 30 seconds.

[0023] Furthermore, in step 5, the guide vane given step test function is started, and the guide vane given assignment module assigns the guide vane given variable in turn with preset step amounts in the positive and reverse directions according to the set interval time. The step amounts include 1%, 2%, and 5% step amounts in the opening direction, and the same step amounts in the closing direction, and the set interval time is 15 seconds.

[0024] Example 2 In another preferred embodiment, based on the above-mentioned embodiment 1, a system for implementing the water-containing test method of the primary frequency regulation of a hydro-turbine generator set based on automatic setting as described in any one of the embodiments 1 includes: a human-machine interface, a frequency assignment module, a data acquisition module and a data analysis module, wherein the human-machine interface is used to select and start the test mode, the frequency assignment module is used to automatically assign frequency values ​​to machine frequency variables according to preset step sizes and interval times, the data acquisition module is used to automatically collect test data, and the data analysis module is used to process data and calculate relevant performance indicators.

[0025] Example 3 In another preferred embodiment, based on the above embodiments 1 and 2, the primary frequency modulation water test method and its process of the hydro-generator set based on automatic setting are as follows: Step 1: During a frequency modulation waterless test, use a function generator to verify that the resolution of the frequency measurement circuit is no greater than 0.003 Hz and the frequency measurement accuracy is no less than 0.2‰, ensuring that the frequency measurement circuit meets the standard requirements so that program constants can be used to replace the external function generator to automatically simulate the unit frequency during the water test in the subsequent steps.

[0026] Step 2: After the test unit is connected to the grid and runs with a stable load, exit the test unit AGC (Automatic Generation Control), activate the primary frequency regulation function, and select the primary frequency regulation test mode on the human-machine interface. This mode is only used as an enabling condition for automatic setting of frequency and opening, and does not affect the primary frequency regulation parameters, structure, and performance of the speed regulation system.

[0027] Step 3: Start the frequency modulation dead zone check function through the human-machine interface. After the second confirmation, the data acquisition is automatically triggered. At the same time, the frequency assignment module takes 50Hz as the starting point, 0.01Hz as the step size in the positive direction, and 50.06Hz as the end point. The frequency value is assigned to the machine frequency variable at intervals of 2s. ; After completing the positive direction dead zone check, 50Hz is automatically assigned to the machine frequency variable , in the reverse direction with a step size of 0.01Hz and an end point of 49.94Hz, assign the frequency value to the machine frequency variable at intervals of 2s , complete the reverse dead zone check; after the collected data curve is smoothed, the critical frequency value of the guide vane in the opening and closing directions is automatically calculated. If the critical frequency value of the action is abnormal, check the primary frequency modulation dead zone parameter settings and related procedures, repeat this step until the critical frequency value of the action is normal, and exit the primary frequency modulation dead zone check function. The specific process is as shown in the attached Figure 2 As shown; the frequency difference of the primary frequency regulation of the hydro-generator set The calculation expression is: (1) Where: is the given frequency value, generally 50Hz; It is the primary frequency modulation dead zone, generally taking the value as 0.05Hz.

[0028] Step 4: Start the opening mode and power frequency step disturbance test function through the human-machine interface. After the second confirmation, the data acquisition is automatically triggered. At the same time, the frequency assignment module assigns the frequency value to the machine frequency variable in the positive direction with 50.1Hz, 50.15Hz, 50.2Hz, and 50.25Hz step amounts, in the manner of 50Hz→step amount→50Hz, at an interval of 30s. ; After completing the positive frequency step disturbance, 50Hz is automatically assigned to the machine frequency variable In the reverse direction, the frequency value is assigned to the machine frequency variable at intervals of 30 seconds in the manner of 50Hz→step amount→50Hz with 49.9Hz, 49.85Hz, 49.8Hz, and 49.75Hz steps. , complete the frequency step disturbance in the opposite direction, the speed regulation system adjusts the frequency difference according to the primary frequency regulation After smoothing the collected data curve, the response lag time of each frequency step disturbance is automatically calculated. , Rise time , Adjust time The specific process is as attached Figure 3 As shown; When the opening is taken as the response target, the opening adjustment amount The calculation expression is: (2) in, is the permanent difference coefficient, generally 4%; The specific performance index requirements are: 1) The opening response lag time from when the frequency difference exceeds the frequency modulation dead zone to when the servomotor starts to change to the target opening , should not be greater than 2s; 2) The rise time from when the frequency difference exceeds the frequency modulation dead zone to when the servomotor displacement reaches 90% of the target value , should not exceed 12s; 3) The time from when the frequency difference exceeds the frequency regulation dead zone once to when the opening adjustment reaches stability. No more than 24s. When power is used as the response target, the power adjustment amount The calculation expression is: (3) in, is the adjustment coefficient, which is generally 3%. is the rated power of the unit; The specific performance index requirements are: 1) The power response lag time from when the frequency difference exceeds the frequency regulation dead zone to when the unit active power starts to change towards the target power , for hydropower units with a rated head of 50m and above, it shall not exceed 4s; for hydropower units with a rated head of less than 50m, it shall not exceed 8s; 2) The rise time from when the frequency difference exceeds the primary frequency regulation dead zone to when the unit active power reaches 90% of the target value , should not exceed 15s; 3) The time from when the frequency difference exceeds the frequency modulation dead zone once to when the power regulation reaches stability. No more than 30s. If the response delay time , Rise time , Adjust time If the above requirements are not met, repeat step 4 by adjusting the PID (Proportion Integration Differentiation) parameters until the requirements are met.

[0029] Step 5: Start the guide vane given step test function through the human-machine interface. After the second confirmation, the data collection is automatically triggered. The guide vane given assignment module takes 50% opening as the starting point, and assigns the opening value to the guide vane given in 1%, 2%, and 5% steps at intervals of 15s in the opening direction; returns to 50% opening, and assigns the opening value to the guide vane given in 1%, 2%, and 5% steps at intervals of 15s in the closing direction; after the collected data curve is smoothed, the difference between each given value and the actual action amount is automatically calculated. If it exceeds ±2%, the follow-up system adjustment dead zone or the switch direction compensation amount and other parameters are adjusted. Repeat step 5 until the requirements are met. The specific process is as shown in the attached figure. Figure 4 shown.

[0030] In the preferred solution, the resolution of the frequency measurement circuit verified by the function generator in step 1 is no more than 0.003Hz, and the frequency measurement accuracy is no less than 0.2‰, which meets the standard requirements; the above settings ensure the stability and accuracy of the frequency measurement system, laying a solid foundation for subsequent signal processing and analysis. At the same time, through strict calibration and testing processes, the reliability and long-term operation capability of the equipment are further verified.

[0031] In the preferred scheme, the primary frequency regulation test mode in step 2 serves as an enabling condition for automatically setting the frequency and opening, and does not affect the primary frequency regulation parameters, structure, and performance of the speed regulation system; the above settings ensure that the test process is highly consistent with the actual operating state of the unit, which not only verifies the reliability of the frequency regulation function, but also avoids interference with the normal operation of the unit, providing a strong guarantee for the safe and stable operation of the power grid.

[0032] In the preferred solution, after the data collection is automatically triggered in step 3, the frequency assignment module takes 50 Hz as the starting point, gradually increases to 50.06 Hz in the positive direction with a step size of 0.01 Hz, and then gradually decreases to 49.94 Hz in the reverse direction. According to the set interval time, the preset frequency values ​​are respectively assigned to the machine frequency variables in the positive and reverse directions to complete the dead zone verification. The above settings ensure the accuracy and flexibility of data collection, effectively avoid the error accumulation caused by frequency fluctuations, and improve the stability and reliability of the overall operation of the system. At the same time, the solution also takes into account the real-time requirements to ensure the efficient execution of the verification process.

[0033] In the preferred solution, the interval time set in step 3 is 2 seconds, and after smoothing the collected data curve, the critical frequency value of the guide vane when moving in the opening and closing directions is automatically calculated; the above settings can ensure the stability and accuracy of the system operation, effectively avoid overshoot and vibration, and optimize energy utilization efficiency, laying a solid foundation for the long-term stable operation of the equipment.

[0034] In the preferred scheme, the frequency step disturbance test function of the opening mode and the power mode is started in step 4, and the frequency assignment module assigns the machine frequency variable in turn with the preset frequency values ​​in the positive and reverse directions according to the set interval time, and the frequency values ​​include 50.1Hz, 50.15Hz, 50.2Hz, 50.25Hz and 49.9Hz, 49.85Hz, 49.8Hz, 49.75Hz, and the set interval time is 30 seconds; the above settings are intended to comprehensively evaluate the response capability of the system under different frequency fluctuations to ensure the stable operation of the system; in addition, the data will be recorded and analyzed in real time during the test for subsequent optimization and adjustment.

[0035] In the preferred scheme, the guide vane given step test function is started in step 5, and the guide vane given assignment module assigns the guide vane given variable in turn with preset step amounts in the positive and reverse directions according to the set interval time, and the step amounts include 1%, 2%, and 5% step amounts in the opening direction, and the same step amount in the closing direction, and the set interval time is 15 seconds; the above settings are intended to comprehensively test the response performance and stability of the guide vanes at different openings through meticulous step amount adjustment; in addition, to ensure the accuracy of the test, the system data will be stably recorded after each step amount for subsequent analysis and optimization.

[0036] In summary, the present invention provides a method and system for testing a primary frequency regulation with water of a hydro-generator set based on automatic setting, which solves the problems of easy misoperation when using a function generator to simulate frequency signals and manual input of wrong step quantities during guide vane setting step tests in the prior art; compared with the traditional primary frequency regulation with water test process, in which a function generator is often used to simulate frequency signal changes, which has the risk of complex operation and easy misoperation, the automatic setting control process of the present invention automatically simulates the unit frequency through program constants, avoids human misoperation, and improves the accuracy and safety of the test; the present invention selects the test mode, starts the test function, and automatically triggers data acquisition through a human-machine interface. This interactive method simplifies the test steps, reduces human intervention, and improves the degree of automation of the test; the present invention accurately checks the dead zone. During the dead zone check process, an automatic frequency assignment module is used to assign frequency with a very small step size (0.01Hz) and a fixed time interval (2 seconds), ensuring the accuracy of the dead zone check; the present invention comprehensively evaluates the performance. In the frequency step disturbance test of the opening mode and the power mode, not only the frequency step disturbance is automatically performed, but also the response lag time, the upper limit, and the upper limit are automatically calculated. The invention provides comprehensive data support for the performance evaluation of the speed control system by introducing automatic given control flow, which completely changes the operation mode of the traditional primary frequency modulation water test and realizes the automation and intelligence of the test process, which is a major innovation of the traditional test method. The invention simplifies the complex test steps into simple human-machine interface operations, reduces the operating burden of the test personnel, and improves the test efficiency. At the same time, the test cycle is further shortened and the test cost is reduced by automatically triggering data collection and data analysis. The invention ensures the stability and response speed of the speed control system in the primary frequency modulation process through accurate dead zone verification and comprehensive performance evaluation, and improves the overall performance of the unit. The invention avoids large fluctuations in opening and power caused by human error through automatic control, reduces the risk of reverse power or overload shutdown of the unit, and ensures the safe and stable operation of the unit.

Claims

1. A water test method for primary frequency regulation of a hydro-generator set based on automatic setting, characterized in that: The method comprises the following steps: Step 1: During the primary frequency modulation waterless test, use a function generator to verify that the resolution and accuracy of the frequency measurement circuit meet the standard requirements, so that in the subsequent water test, program constants can be used to replace the external function generator to automatically simulate the unit frequency; Step 2: After the test unit is connected to the grid and running with a stable load, exit the automatic generation control AGC of the test unit, start the primary frequency regulation function, and select the primary frequency regulation test mode through the human-machine interface; Step 3: Start the frequency modulation dead zone check function through the human-machine interface. After the second confirmation, the data collection is automatically triggered. The frequency assignment module assigns the preset frequency value to the machine frequency variable in the positive and negative directions according to the set interval time. After the dead zone check is completed, the critical frequency value of the guide vane action is automatically calculated, and the parameter setting is checked until the action critical frequency value is normal; Step 4: Start the frequency step disturbance test function of the opening mode and power mode through the human-machine interface. After secondary confirmation, the data collection is automatically triggered. The frequency assignment module assigns the preset frequency value to the machine frequency variable in the positive and negative directions according to the set interval time. After completing the frequency step disturbance, the response lag time, rise time, and adjustment time are automatically calculated, and the parameters are adjusted according to the performance index requirements until the standard requirements are met; Step 5: Start the guide vane given step test function through the human-machine interface. After secondary confirmation, data collection is automatically triggered. The guide vane given assignment module assigns the guide vane given variable in the positive and reverse directions in turn with the preset step amount according to the set interval time. After completing the guide vane given step disturbance, the difference between the given and actual action amounts is automatically calculated, and the follow-up system parameters are adjusted as needed until the standard requirements are met.

2. The method for testing the primary frequency modulation of a hydro-generator set based on automatic setting according to claim 1 is characterized in that: The function generator in step 1 verifies that the resolution of the frequency measurement loop is no greater than 0.003 Hz and the frequency measurement accuracy is no less than 0.2‰, which meets the standard requirements.

3. The method for testing the primary frequency modulation of a hydro-generator set based on automatic setting according to claim 1 is characterized in that: The primary frequency modulation test mode in step 2 is used as an enabling condition for automatically setting the frequency and opening, and does not affect the primary frequency modulation parameters, structure, and performance of the speed regulation system.

4. The method for testing the primary frequency modulation of a hydro-generator set based on automatic setting according to claim 1 is characterized in that: After the data collection is automatically triggered in step 3, the frequency assignment module starts at 50 Hz, gradually increases to 50.06 Hz in the positive direction with a step size of 0.01 Hz, and then gradually decreases to 49.94 Hz in the reverse direction. According to the set interval time, the preset frequency values ​​are assigned to the machine frequency variables in the positive and reverse directions respectively to complete the dead zone verification.

5. The method for testing the primary frequency modulation of a hydro-generator set based on automatic setting according to claim 4 is characterized in that: The interval time set in step 3 is 2 seconds, and after smoothing the collected data curve, the critical frequency value of the guide vane when it moves in the opening and closing directions is automatically calculated.

6. The method for testing the primary frequency modulation of a hydro-generator set based on automatic setting according to claim 1 is characterized in that: In step 4, the frequency step disturbance test function of the opening mode and the power mode is started. The frequency assignment module assigns the machine frequency variable with the preset frequency values ​​in the positive and reverse directions according to the set interval time. The frequency values ​​include 50.1Hz, 50.15Hz, 50.2Hz, 50.25Hz and 49.9Hz, 49.85Hz, 49.8Hz, 49.75Hz, and the set interval time is 30 seconds.

7. The method for testing the primary frequency modulation of a hydro-generator set based on automatic setting according to claim 1 is characterized in that: In step 5, the guide vane given step test function is started. The guide vane given assignment module assigns the guide vane given variable in turn with preset step amounts in the positive and reverse directions according to the set interval time. The step amounts include 1%, 2%, and 5% step amounts in the opening direction, and the same step amounts in the closing direction. The set interval time is 15 seconds.

8. A system for implementing the water-based primary frequency modulation test method of a hydro-generator set based on automatic setting as described in any one of claims 1 to 7, comprising: Human-machine interface, frequency assignment module, data acquisition module and data analysis module, wherein the human-machine interface is used to select and start the test mode, the frequency assignment module is used to automatically assign frequency values ​​to machine frequency variables according to preset step sizes and interval times, the data acquisition module is used to automatically collect test data, and the data analysis module is used to process data and calculate relevant performance indicators.

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