A method and system for optimizing guide vane opening control of a unit based on virtual inertia

Abstract

The present application relates to the field of hydropower unit control technology, and in particular to a method and system for optimizing the guide vane opening of a unit based on virtual inertia. The method comprises: obtaining the load fluctuation amplitude of the hydropower unit at the time to be optimized and the initial guide vane opening value of the hydropower unit output by the speed regulator PID control, and collecting the frequency feedback value of the hydropower unit at the time to be optimized and the frequency deviation signal at each time within a preset time; determining the virtual inertia of the hydropower unit at the time to be optimized; determining the guide vane opening compensation amount of the hydropower unit at the time to be optimized based on the virtual inertia, frequency feedback value, and frequency deviation signal of the hydropower unit at the time to be optimized; optimizing the initial guide vane opening value based on the guide vane opening compensation amount at the time to be optimized to obtain the optimized guide vane opening value of the hydropower unit, and then optimizing the unit based on the optimized guide vane opening value of the hydropower unit. The technical solution proposed in the present application improves the guide vane adjustment response speed and adjustment accuracy.

Description

Technical Field

[0001] The present application relates to the technical field of hydropower unit control, and in particular to a method and system for optimizing the guide vane opening of a unit based on virtual inertia. Background Art

[0002] Hydropower generation is a technology that converts water energy into electrical energy; the water energy utilized in hydropower generation is primarily the potential energy contained in the water. To achieve this conversion, the hydropower unit needs to be regulated to achieve this. Existing hydropower unit speed regulator systems typically use negative feedback control for frequency regulation. However, during rapid speed regulation, due to the influence of the water flow's inertial force, the opening and closing of the guide vanes may experience significant lags, making closing the guide vanes particularly difficult. This results in reduced regulation accuracy, which in turn affects system stability. Therefore, there is an urgent need to propose a solution that can improve the response speed and accuracy of guide vane regulation. Summary of the Invention

[0003] The present application provides a method and system for optimizing guide vane opening control of a unit based on virtual inertia, so as to at least solve the technical problems of delayed guide vane adjustment and low adjustment accuracy.

[0004] The first embodiment of the present application provides a method for optimizing guide vane opening control of a turbine generator set based on virtual inertia, the method comprising:

[0005] Obtain the load fluctuation amplitude of the hydropower unit in the hydropower plant at the time of optimization and the initial value of the guide vane opening of the hydropower unit output by the speed regulator PID control, and use the frequency sensor to collect the frequency feedback value of the hydropower unit at the time of optimization and the frequency deviation signal at each time within the preset time length;

[0006] Determine the virtual inertia of the hydropower unit at the time to be optimized according to the load fluctuation amplitude at the time to be optimized and the frequency feedback value;

[0007] Determine the guide vane opening compensation amount of the hydropower unit at the time to be optimized according to the virtual inertia of the hydropower unit at the time to be optimized, the frequency feedback value, and the frequency deviation signal at each time within the preset time length;

[0008] The guide vane opening initial value is optimized based on the guide vane opening compensation amount at the time to be optimized to obtain an optimized guide vane opening value of the hydropower unit, and then the hydropower unit is optimized and controlled based on the optimized guide vane opening value of the hydropower unit.

[0009] Preferably, the calculation formula of the virtual inertia of the hydropower unit at the time to be optimized is as follows:

[0010]

[0011] Where, is the virtual inertia of the hydropower unit at the time t to be optimized, is the reference virtual inertia, is the first dynamic gain coefficient, is the second dynamic gain coefficient, is the frequency feedback value of the hydropower unit to be optimized at time t, is the load fluctuation amplitude of the hydropower unit at the time t to be optimized, is the rated power of the hydropower unit.

[0012] Furthermore, the method of determining the guide vane opening compensation amount of the hydropower unit at the time to be optimized based on the virtual inertia of the hydropower unit at the time to be optimized, the frequency feedback value, and the frequency deviation signal at each time within the preset time period includes:

[0013] Predicting the frequency trend of the hydropower unit speed governor based on the frequency deviation signal at each moment within the preset time period;

[0014] The guide vane opening compensation amount of the hydropower unit at the time to be optimized is determined according to the frequency trend of the speed regulator, the virtual inertia of the hydropower unit at the time to be optimized, and the frequency feedback value.

[0015] Furthermore, the predicting of the frequency trend of the hydropower unit speed governor according to the frequency deviation signal at each moment within the preset time period includes:

[0016] Determining the differential value at each moment within the preset time length according to the frequency deviation signal at each moment within the preset time length;

[0017] When the difference values at each moment within the preset time period are all greater than 0, it is predicted that the frequency of the hydropower unit speed governor is in a downward trend;

[0018] When the difference values at each moment within the preset time period are all less than 0, it is predicted that the frequency of the hydropower unit speed governor is on an upward trend;

[0019] Among them, each moment within the preset time length is N moments before the moment to be optimized.

[0020] Furthermore, determining the guide vane opening compensation amount of the hydropower unit at the time to be optimized based on the frequency trend of the speed governor, the virtual inertia of the hydropower unit at the time to be optimized, and the frequency feedback value includes:

[0021] Determining the absolute value of the guide vane opening compensation amount of the hydropower unit at the time to be optimized according to the virtual inertia of the hydropower unit at the time to be optimized and the frequency feedback value;

[0022] Determining the positive or negative value of the guide vane opening compensation amount of the hydropower unit at the time to be optimized according to the frequency trend of the speed governor;

[0023] The guide vane opening compensation amount of the hydropower unit at the time to be optimized is determined according to the absolute value of the guide vane opening compensation amount and the positive or negative sign of the guide vane opening compensation amount at the time to be optimized of the hydropower unit.

[0024] Furthermore, the calculation formula for the absolute value of the guide vane opening compensation amount at the time of optimization of the hydropower unit is as follows:

[0025]

[0026] Where, is the absolute value of the guide vane opening compensation at the time t to be optimized, is the turbine power coefficient, For the water head.

[0027] Furthermore, the determining of the positive or negative value of the guide vane opening compensation amount of the hydropower unit at the time to be optimized according to the frequency trend of the speed governor includes:

[0028] When the frequency of the speed governor of the hydropower unit is in a downward trend, the guide vane opening compensation amount of the hydropower unit at the time to be optimized is a positive value;

[0029] When the frequency of the hydropower unit speed governor is in an upward and downward trend, the guide vane opening compensation amount of the hydropower unit at the time to be optimized is a negative value;

[0030] When the guide vane opening compensation value of the hydropower unit at the time of optimization is positive, the calculation formula of the guide vane opening value of the optimized hydropower unit is as follows:

[0031]

[0032] When the guide vane opening compensation value of the hydropower unit at the time of optimization is negative, the calculation formula of the guide vane opening value of the optimized hydropower unit is as follows:

[0033]

[0034] Where, is the guide vane opening value of the hydropower unit after optimization at the time t to be optimized, is the initial value of the guide vane opening of the hydropower unit at the time t to be optimized, which is output by the PID control of the speed regulator.

[0035] The second embodiment of the present application provides a unit guide vane opening optimization control system based on virtual inertia, including:

[0036] An acquisition module is used to obtain the load fluctuation amplitude of the hydropower unit in the hydropower plant at the time of optimization and the initial value of the guide vane opening of the hydropower unit output by the speed regulator PID control, and use a frequency sensor to collect the frequency feedback value of the hydropower unit at the time of optimization and the frequency deviation signal at each time within a preset time length;

[0037] A first determining module is used to determine the virtual inertia of the hydropower unit at the time to be optimized according to the load fluctuation amplitude at the time to be optimized and the frequency feedback value;

[0038] A second determination module is configured to determine a guide vane opening compensation amount at the time when the hydropower unit is to be optimized based on the virtual inertia of the hydropower unit at the time when the hydropower unit is to be optimized, the frequency feedback value, and the frequency deviation signal at each time within the preset time period;

[0039] The optimization control module is used to optimize the initial guide vane opening value based on the guide vane opening compensation amount at the time to be optimized, obtain the optimized guide vane opening value of the hydropower unit, and then optimize the control of the hydropower unit based on the optimized guide vane opening value of the hydropower unit.

[0040] The third aspect of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the method for optimizing the guide vane opening of the unit based on virtual inertia as described in the first aspect of the present application is implemented.

[0041] The fourth embodiment of the present application proposes a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, the method for optimizing the guide vane opening of the unit based on virtual inertia as described in the first embodiment is implemented.

[0042] The technical solutions provided by the embodiments of this application bring at least the following beneficial effects:

[0043] This application proposes a method and system for optimizing the guide vane opening of a unit based on virtual inertia. The method includes: obtaining the load fluctuation amplitude of the hydropower unit at the time to be optimized and the initial guide vane opening value of the hydropower unit output by the speed regulator PID control, and using a frequency sensor to collect the frequency feedback value of the hydropower unit at the time to be optimized and the frequency deviation signal at each time within a preset time; determining the virtual inertia of the hydropower unit at the time to be optimized based on the load fluctuation amplitude and the frequency feedback value; determining the guide vane opening compensation amount of the hydropower unit at the time to be optimized based on the virtual inertia of the hydropower unit at the time to be optimized, the frequency feedback value, and the frequency deviation signal at each time within the preset time; optimizing the initial guide vane opening value based on the guide vane opening compensation amount at the time to be optimized to obtain the optimized guide vane opening value of the hydropower unit, and then optimizing the control of the hydropower unit based on the optimized guide vane opening value of the hydropower unit. The technical solution proposed in this application increases the feedforward control compensation amount of the guide vane adjustment signal through virtual inertia, thereby achieving efficient and accurate guide vane adjustment.

[0044] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0046] Figure 1 This is a flow chart of a method for optimizing guide vane opening of a turbine unit based on virtual inertia according to one embodiment of the present application;

[0047] Figure 2 The present invention provides a structural diagram of a unit guide vane opening optimization control system based on virtual inertia according to one embodiment of the present application. DETAILED DESCRIPTION

[0048] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0049] The present application proposes a method and system for optimizing the guide vane opening of a generator set based on virtual inertia. The method comprises: obtaining the load fluctuation amplitude of the hydropower unit at the time to be optimized and the initial guide vane opening value of the hydropower unit output by the PID control of the speed regulator in the hydropower plant, and using a frequency sensor to collect the frequency feedback value of the hydropower unit at the time to be optimized and the frequency deviation signal at each time within a preset time; determining the virtual inertia of the hydropower unit at the time to be optimized based on the load fluctuation amplitude and the frequency feedback value; determining the guide vane opening compensation amount of the hydropower unit at the time to be optimized based on the virtual inertia of the hydropower unit at the time to be optimized, the frequency feedback value, and the frequency deviation signal at each time within the preset time; optimizing the initial guide vane opening value based on the guide vane opening compensation amount at the time to be optimized to obtain the optimized guide vane opening value of the hydropower unit, and then optimizing the control of the hydropower unit based on the optimized guide vane opening value of the hydropower unit. The technical solution proposed in the present application increases the feedforward control compensation amount of the guide vane adjustment signal through virtual inertia, thereby achieving efficient and accurate guide vane adjustment.

[0050] The following describes, with reference to the accompanying drawings, a method and system for optimizing the guide vane opening of a unit based on virtual inertia according to an embodiment of the present application.

[0051] Example 1

[0052] Figure 1Flowchart of a method for optimizing guide vane opening based on virtual inertia according to an embodiment of the present application. Figure 1 As shown, the method includes:

[0053] Step 1: Obtain the load fluctuation amplitude of the hydropower unit in the hydropower plant at the time to be optimized and the initial value of the guide vane opening of the hydropower unit output by the speed regulator PID control, and use the frequency sensor to collect the frequency feedback value of the hydropower unit at the time to be optimized and the frequency deviation signal at each time within the preset time.

[0054] It should be noted that the frequency sensor is a high-precision frequency sensor.

[0055] Step 2: Determine the virtual inertia of the hydropower unit at the time to be optimized based on the load fluctuation amplitude at the time to be optimized and the frequency feedback value.

[0056] In the embodiment of the present disclosure, the calculation formula of the virtual inertia of the hydropower unit at the time to be optimized is as follows:

[0057]

[0058] Where, is the virtual inertia of the hydropower unit at the time t to be optimized, is the reference virtual inertia, is the first dynamic gain coefficient, is the second dynamic gain coefficient, is the frequency feedback value of the hydropower unit to be optimized at time t, is the load fluctuation amplitude of the hydropower unit at the time t to be optimized, is the rated power of the hydropower unit.

[0059] in, It can be 1-1.5 times the actual inertia, 、 is the dynamic gain coefficient optimized through simulation or experiment.

[0060] Step 3: Determine the guide vane opening compensation amount of the hydropower unit at the time to be optimized based on the virtual inertia of the hydropower unit at the time to be optimized, the frequency feedback value, and the frequency deviation signal at each time within the preset time length.

[0061] In the embodiment of the present disclosure, step 3 specifically includes:

[0062] Step 3.1: predicting the frequency trend of the hydropower unit speed governor according to the frequency deviation signal at each moment within the preset time period;

[0063] Wherein, the step 3.1 specifically includes:

[0064] Determining the differential value at each moment within the preset time length according to the frequency deviation signal at each moment within the preset time length;

[0065] When the difference values at each moment within the preset time period are all greater than 0, it is predicted that the frequency of the hydropower unit speed governor is in a downward trend;

[0066] When the difference values at each moment within the preset time period are all less than 0, it is predicted that the frequency of the hydropower unit speed governor is on an upward trend;

[0067] Among them, each moment within the preset time length is N moments before the moment to be optimized.

[0068] It should be noted that the calculation formula for the difference value at each moment within the preset time length is as follows:

[0069]

[0070] Where, is the difference value at time t-1, is the given frequency of the speed regulator at time t-1, is the speed regulator feedback frequency at time t-1, is the window length.

[0071] The N moments may be 3 moments, that is, the 3 moments before the moment t to be optimized.

[0072] Step 3.2: Determine the guide vane opening compensation amount of the hydropower unit at the time to be optimized according to the frequency trend of the speed governor, the virtual inertia of the hydropower unit at the time to be optimized, and the frequency feedback value.

[0073] Wherein, the step 3.2 specifically includes:

[0074] Determining the absolute value of the guide vane opening compensation amount of the hydropower unit at the time to be optimized according to the virtual inertia of the hydropower unit at the time to be optimized and the frequency feedback value;

[0075] It should be noted that the calculation formula for the absolute value of the guide vane opening compensation amount at the time of optimization of the hydropower unit is as follows:

[0076]

[0077] Where, is the absolute value of the guide vane opening compensation at the time t to be optimized, is the turbine power coefficient, For the water head.

[0078] Determining the positive or negative value of the guide vane opening compensation amount of the hydropower unit at the time to be optimized according to the frequency trend of the speed governor;

[0079] It should be noted that when the frequency of the hydropower unit speed governor is on a downward trend, the guide vane opening compensation amount of the hydropower unit at the time to be optimized is a positive value, and the guide vanes need to be driven to open quickly;

[0080] When the frequency of the hydroelectric generator set speed regulator is in an upward and downward trend, the guide vane opening compensation amount of the hydroelectric generator set at the time to be optimized is a negative value, and the guide vanes need to be driven to close quickly.

[0081] The guide vane opening compensation amount of the hydropower unit at the time to be optimized is determined according to the absolute value of the guide vane opening compensation amount and the positive or negative sign of the guide vane opening compensation amount at the time to be optimized of the hydropower unit.

[0082] It should be noted that the absolute value of the guide vane opening compensation at the time t to be optimized needs to meet the dynamic amplitude constraint to prevent the guide vane opening from exceeding the mechanical limit and ensure equipment safety. The calculation formula of the dynamic amplitude constraint is as follows:

[0083]

[0084] Where, is the guide vane opening compensation power at the time t to be optimized, .

[0085] Step 4: Optimize the initial guide vane opening value based on the guide vane opening compensation amount at the time to be optimized to obtain an optimized guide vane opening value of the hydropower unit, and then optimize and control the hydropower unit based on the optimized guide vane opening value of the hydropower unit.

[0086] In the embodiment of the present disclosure, when the guide vane opening compensation amount of the hydropower unit at the time to be optimized is a positive value, the calculation formula of the guide vane opening value of the optimized hydropower unit is as follows:

[0087]

[0088] When the guide vane opening compensation value of the hydropower unit at the time of optimization is negative, the calculation formula of the guide vane opening value of the optimized hydropower unit is as follows:

[0089]

[0090] Where, is the guide vane opening value of the hydropower unit after optimization at the time t to be optimized, is the initial value of the guide vane opening of the hydropower unit at the time t to be optimized, which is output by the PID control of the speed regulator.

[0091] It should be noted that, based on the guide vane opening optimization control method based on virtual inertia proposed in this embodiment, a guide vane adjustment test was conducted, and it was found that when the load changed rapidly, the response speed and frequency regulation accuracy of the traditional speed regulator and the guide vane advance adjustment system of the present invention were tested. After using the present invention, the guide vane adjustment response time was reduced by 30%, and the frequency deviation recovery time was shortened by 25%.

[0092] In summary, the present embodiment proposes a method for optimizing the guide vane opening of a unit based on virtual inertia. By using virtual inertia and dynamically predicting the frequency trend, the feedforward control compensation amount of the guide vane adjustment signal is increased, thereby achieving efficient and precise adjustment of the guide vanes.

[0093] Example 2

[0094] Figure 2 This is a structural diagram of a unit guide vane opening optimization control system based on virtual inertia according to one embodiment of the present application, as shown in FIG. Figure 2 As shown, the system includes:

[0095] The acquisition module 100 is used to obtain the load fluctuation amplitude of the hydropower unit in the hydropower plant at the time of optimization and the initial value of the guide vane opening of the hydropower unit output by the speed governor PID control, and use the frequency sensor to collect the frequency feedback value of the hydropower unit at the time of optimization and the frequency deviation signal at each time within a preset time period;

[0096] A first determining module 200 is configured to determine the virtual inertia of the hydropower unit at the time to be optimized based on the load fluctuation amplitude at the time to be optimized and the frequency feedback value;

[0097] The calculation formula of the virtual inertia of the hydropower unit at the time to be optimized is as follows:

[0098]

[0099] Where, is the virtual inertia of the hydropower unit at the time t to be optimized, is the reference virtual inertia, is the first dynamic gain coefficient, is the second dynamic gain coefficient, is the frequency feedback value of the hydropower unit to be optimized at time t, is the load fluctuation amplitude of the hydropower unit at the time t to be optimized, is the rated power of the hydropower unit.

[0100] The second determination module 300 is configured to determine the guide vane opening compensation amount of the hydropower unit at the time to be optimized based on the virtual inertia of the hydropower unit at the time to be optimized, the frequency feedback value, and the frequency deviation signal at each time within the preset time period;

[0101] The optimization control module 400 is used to optimize the initial guide vane opening value based on the guide vane opening compensation amount at the time to be optimized, obtain the optimized guide vane opening value of the hydropower unit, and then optimize the control of the hydropower unit based on the optimized guide vane opening value of the hydropower unit.

[0102] In the embodiment of the present disclosure, the second determining module 300 is further configured to:

[0103] Predicting the frequency trend of the hydropower unit speed governor based on the frequency deviation signal at each moment within the preset time period;

[0104] The guide vane opening compensation amount of the hydropower unit at the time to be optimized is determined according to the frequency trend of the speed regulator, the virtual inertia of the hydropower unit at the time to be optimized, and the frequency feedback value.

[0105] Furthermore, the second determining module 300 is further configured to:

[0106] Determining the differential value at each moment within the preset time length according to the frequency deviation signal at each moment within the preset time length;

[0107] When the difference values at each moment within the preset time period are all greater than 0, it is predicted that the frequency of the hydropower unit speed governor is in a downward trend;

[0108] When the difference values at each moment within the preset time period are all less than 0, it is predicted that the frequency of the hydropower unit speed governor is on an upward trend;

[0109] Among them, each moment within the preset time length is N moments before the moment to be optimized.

[0110] Furthermore, the second determining module 300 is further configured to:

[0111] Determining the absolute value of the guide vane opening compensation amount of the hydropower unit at the time to be optimized according to the virtual inertia of the hydropower unit at the time to be optimized and the frequency feedback value;

[0112] The calculation formula of the absolute value of the guide vane opening compensation amount at the time of optimization of the hydropower unit is as follows:

[0113]

[0114] Where, is the absolute value of the guide vane opening compensation at the time t to be optimized, is the turbine power coefficient, For the water head.

[0115] Determining the positive or negative value of the guide vane opening compensation amount of the hydropower unit at the time to be optimized according to the frequency trend of the speed governor;

[0116] The guide vane opening compensation amount of the hydropower unit at the time to be optimized is determined according to the absolute value of the guide vane opening compensation amount and the positive or negative sign of the guide vane opening compensation amount at the time to be optimized of the hydropower unit.

[0117] Furthermore, the second determining module 300 is further configured to:

[0118] When the frequency of the speed governor of the hydropower unit is in a downward trend, the guide vane opening compensation amount of the hydropower unit at the time to be optimized is a positive value;

[0119] When the frequency of the speed regulator of the hydropower unit is in an upward and downward trend, the guide vane opening compensation amount of the hydropower unit at the time to be optimized is a negative value.

[0120] In the embodiment of the present disclosure, the optimization control module 400 is further configured to:

[0121] When the guide vane opening compensation value of the hydropower unit at the time of optimization is positive, the calculation formula of the guide vane opening value of the optimized hydropower unit is as follows:

[0122]

[0123] When the guide vane opening compensation value of the hydropower unit at the time of optimization is negative, the calculation formula of the guide vane opening value of the optimized hydropower unit is as follows:

[0124]

[0125] Where, is the guide vane opening value of the hydropower unit after optimization at the time t to be optimized, is the initial value of the guide vane opening of the hydropower unit at the time t to be optimized, which is output by the PID control of the speed regulator.

[0126] In summary, the present embodiment proposes a unit guide vane opening optimization control system based on virtual inertia, which uses virtual inertia and dynamically predicts frequency trends to increase the feedforward control compensation amount of the guide vane adjustment signal, thereby achieving efficient and precise adjustment of the guide vanes.

[0127] Example 3

[0128] In order to implement the above embodiments, the present disclosure also proposes an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the method for optimizing the guide vane opening of the unit based on virtual inertia as described in Example 1 is implemented.

[0129] Example 4

[0130] In order to implement the above embodiments, the present disclosure further proposes a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, the method for optimizing the guide vane opening of the unit based on virtual inertia as described in the first embodiment is implemented.

[0131] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0132] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0133] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for optimizing the guide vane opening of a turbine unit based on virtual inertia, characterized in that: The method comprises: Obtain the load fluctuation amplitude of the hydropower unit in the hydropower plant at the time of optimization and the initial value of the guide vane opening of the hydropower unit output by the speed regulator PID control, and use the frequency sensor to collect the frequency feedback value of the hydropower unit at the time of optimization and the frequency deviation signal at each time within the preset time length; Determine the virtual inertia of the hydropower unit at the time to be optimized according to the load fluctuation amplitude at the time to be optimized and the frequency feedback value; Determine the guide vane opening compensation amount of the hydropower unit at the time to be optimized according to the virtual inertia of the hydropower unit at the time to be optimized, the frequency feedback value, and the frequency deviation signal at each time within the preset time length; The guide vane opening initial value is optimized based on the guide vane opening compensation amount at the time to be optimized to obtain an optimized guide vane opening value of the hydropower unit, and then the hydropower unit is optimized and controlled based on the optimized guide vane opening value of the hydropower unit.

2. The method for optimizing guide vane opening of a turbine generator set based on virtual inertia according to claim 1, wherein: The calculation formula of the virtual inertia of the hydropower unit at the time to be optimized is as follows: Where, is the virtual inertia of the hydropower unit at the time t to be optimized, is the reference virtual inertia, is the first dynamic gain coefficient, is the second dynamic gain coefficient, is the frequency feedback value of the hydropower unit to be optimized at time t, is the load fluctuation amplitude of the hydropower unit at the time t to be optimized, is the rated power of the hydropower unit.

3. The method for optimizing guide vane opening of a turbine generator set based on virtual inertia according to claim 2, wherein: The determining of the guide vane opening compensation amount of the hydropower unit at the time to be optimized according to the virtual inertia of the hydropower unit at the time to be optimized, the frequency feedback value, and the frequency deviation signal at each time within the preset time period includes: Predicting the frequency trend of the hydropower unit speed governor based on the frequency deviation signal at each moment within the preset time period; The guide vane opening compensation amount of the hydropower unit at the time to be optimized is determined according to the frequency trend of the speed regulator, the virtual inertia of the hydropower unit at the time to be optimized, and the frequency feedback value.

4. The method for optimizing guide vane opening of a turbine generator set based on virtual inertia according to claim 3, wherein: The predicting of the frequency trend of the hydropower generator speed governor according to the frequency deviation signal at each moment within the preset time period includes: Determining the differential value at each moment within the preset time length according to the frequency deviation signal at each moment within the preset time length; When the difference values at each moment within the preset time period are all greater than 0, it is predicted that the frequency of the hydropower unit speed governor is in a downward trend; When the difference values at each moment within the preset time period are all less than 0, it is predicted that the frequency of the hydropower unit speed governor is on an upward trend; Among them, each moment within the preset time length is N moments before the moment to be optimized.

5. The method for optimizing guide vane opening of a turbine generator set based on virtual inertia according to claim 4, characterized in that: The determining of the guide vane opening compensation amount of the hydropower unit at the time to be optimized according to the frequency trend of the speed governor, the virtual inertia of the hydropower unit at the time to be optimized, and the frequency feedback value comprises: Determining the absolute value of the guide vane opening compensation amount of the hydropower unit at the time to be optimized according to the virtual inertia of the hydropower unit at the time to be optimized and the frequency feedback value; Determining the positive or negative value of the guide vane opening compensation amount of the hydropower unit at the time to be optimized according to the frequency trend of the speed governor; The guide vane opening compensation amount of the hydropower unit at the time to be optimized is determined according to the absolute value of the guide vane opening compensation amount and the positive or negative sign of the guide vane opening compensation amount at the time to be optimized of the hydropower unit.

6. The method for optimizing guide vane opening of a turbine generator set based on virtual inertia according to claim 5, characterized in that: The calculation formula for the absolute value of the guide vane opening compensation amount of the hydropower unit at the time to be optimized is as follows: Where, is the absolute value of the guide vane opening compensation at the time t to be optimized, is the turbine power coefficient, For the water head.

7. The method for optimizing guide vane opening of a turbine generator set based on virtual inertia according to claim 6, wherein: Determining the positive or negative value of the guide vane opening compensation amount of the hydropower unit at the time to be optimized based on the frequency trend of the speed governor includes: When the frequency of the speed governor of the hydropower unit is in a downward trend, the guide vane opening compensation amount of the hydropower unit at the time to be optimized is a positive value; When the frequency of the hydropower unit speed governor is in an upward and downward trend, the guide vane opening compensation amount of the hydropower unit at the time to be optimized is a negative value; When the guide vane opening compensation value of the hydropower unit at the time of optimization is positive, the calculation formula of the guide vane opening value of the optimized hydropower unit is as follows: When the guide vane opening compensation value of the hydropower unit at the time of optimization is negative, the calculation formula of the guide vane opening value of the optimized hydropower unit is as follows: Where, is the guide vane opening value of the hydropower unit after optimization at the time t to be optimized, is the initial value of the guide vane opening of the hydropower unit at the time t to be optimized, which is output by the PID control of the speed regulator.

8. A unit guide vane opening optimization control system based on virtual inertia, characterized in that: The system comprises: An acquisition module is used to obtain the load fluctuation amplitude of the hydropower unit in the hydropower plant at the time of optimization and the initial value of the guide vane opening of the hydropower unit output by the speed regulator PID control, and use a frequency sensor to collect the frequency feedback value of the hydropower unit at the time of optimization and the frequency deviation signal at each time within a preset time length; A first determining module is used to determine the virtual inertia of the hydropower unit at the time to be optimized according to the load fluctuation amplitude at the time to be optimized and the frequency feedback value; A second determination module is configured to determine a guide vane opening compensation amount at the time when the hydropower unit is to be optimized based on the virtual inertia of the hydropower unit at the time when the hydropower unit is to be optimized, the frequency feedback value, and the frequency deviation signal at each time within the preset time period; The optimization control module is used to optimize the initial guide vane opening value based on the guide vane opening compensation amount at the time to be optimized, obtain the optimized guide vane opening value of the hydropower unit, and then optimize the control of the hydropower unit based on the optimized guide vane opening value of the hydropower unit.

9. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method for optimizing the guide vane opening of a unit based on virtual inertia as claimed in any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the unit guide vane opening optimization control method based on virtual inertia as described in any one of claims 1 to 7 is implemented.

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