Unit guide vane opening optimization control method and system based on virtual inertia

Abstract

The invention relates to the technical field of hydroelectric generating set control, in particular to a set guide vane opening degree optimization control method and system based on virtual inertia, and the method comprises the steps: obtaining a load fluctuation amplitude value of a hydroelectric generating set in a hydraulic power plant at a to-be-optimized moment and a guide vane opening degree initial value of the hydroelectric generating set outputted by PID control of a speed regulator; collecting a frequency feedback value of a to-be-optimized moment of the hydroelectric generating set and a frequency deviation signal of each moment within a preset duration; determining the virtual inertia of the hydroelectric generating set at the to-be-optimized moment; determining the guide vane opening compensation amount of the hydroelectric generating set at the to-be-optimized moment according to the virtual inertia, the frequency feedback value and the frequency deviation signal of the hydroelectric generating set at the to-be-optimized moment; and optimizing the guide vane opening initial value based on the guide vane opening compensation amount at the to-be-optimized moment to obtain an optimized guide vane opening value of the hydroelectric generating set, and then performing optimization control on the hydroelectric generating set based on the optimized guide vane opening value of the hydroelectric generating set. According to the technical scheme, the guide vane adjusting response speed and adjusting precision are improved.

Description

Technical Field

[0001] This application relates to the technical field of hydro-generator unit control, and particularly to an optimized control method and system for 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 mainly the potential energy stored in water bodies. To convert water energy into electrical energy, it is necessary to regulate the hydro-generator unit to achieve the conversion. The existing governor systems of hydro-generator units usually perform frequency regulation based on negative feedback control. However, when the governor adjusts rapidly, due to the influence of the water flow inertia force, the opening and closing adjustments of the guide vanes may show obvious lags, especially when closing the guide vanes is more difficult, resulting in a decrease in the adjustment accuracy and thus affecting the system stability. Therefore, there is an urgent need to propose a solution that can improve the response speed and adjustment accuracy of the guide vane regulation. Summary of the Invention

[0003] This application provides an optimized control method and system for the guide vane opening of a unit based on virtual inertia to at least solve the technical problems of lagging and low adjustment accuracy of the guide vane regulation.

[0004] The first aspect embodiment of this application proposes an optimized control method for the guide vane opening of a unit based on virtual inertia, and the method includes: Obtain the load fluctuation amplitude at the moment to be optimized of the hydro-generator unit in the hydropower plant and the initial value of the guide vane opening of the hydro-generator unit output by the governor PID control, and use a frequency sensor to collect the frequency feedback value at the moment to be optimized of the hydro-generator unit and the frequency deviation signals at each moment within a preset time period; Determine the virtual inertia of the hydro-generator unit at the moment to be optimized according to the load fluctuation amplitude at the moment to be optimized and the frequency feedback value; Determine the guide vane opening compensation amount of the hydro-generator unit at the moment to be optimized according to the virtual inertia of the hydro-generator unit at the moment to be optimized, the frequency feedback value, and the frequency deviation signals at each moment within the preset time period; Optimize the initial value of the guide vane opening based on the guide vane opening compensation amount at the moment to be optimized to obtain the optimized guide vane opening value of the hydro-generator unit, and then perform optimized control on the hydro-generator unit based on the optimized guide vane opening value of the hydro-generator unit.

[0005] Preferably, the calculation formula for the virtual inertia of the hydro-generator unit at the moment to be optimized is as follows:

[0006] In the formula, is the virtual inertia of the hydro-generator unit at moment 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 at the moment t to be optimized, is the load fluctuation amplitude of the hydropower unit at the moment t to be optimized, is the rated power of the hydropower unit.

[0007] Furthermore, determining the guide vane opening compensation amount of the hydropower unit at the moment to be optimized according to the virtual inertia, the frequency feedback value, and the frequency deviation signals at each moment within the preset duration of the hydropower unit includes: Predicting the frequency trend of the governor of the hydropower unit according to the frequency deviation signals at each moment within the preset duration; Determining the guide vane opening compensation amount of the hydropower unit at the moment to be optimized according to the frequency trend of the governor, the virtual inertia of the hydropower unit at the moment to be optimized, and the frequency feedback value.

[0008] Furthermore, predicting the frequency trend of the governor of the hydropower unit according to the frequency deviation signals at each moment within the preset duration includes: Respectively determining the difference values at each moment within the preset duration according to the frequency deviation signals at each moment within the preset duration; When the difference values at each moment within the preset duration are all greater than 0, predicting that the frequency of the governor of the hydropower unit is in a downward trend; When the difference values at each moment within the preset duration are all less than 0, predicting that the frequency of the governor of the hydropower unit is in an upward trend; Wherein, each moment within the preset duration is N moments before the moment to be optimized.

[0009] Furthermore, determining the guide vane opening compensation amount of the hydropower unit at the moment to be optimized according to the frequency trend of the governor, the virtual inertia of the hydropower unit at the moment to be optimized, and the frequency feedback value includes: Determining the absolute value of the guide vane opening compensation amount of the hydropower unit at the moment to be optimized according to the virtual inertia of the hydropower unit at the moment to be optimized and the frequency feedback value; Determining the positive or negative of the guide vane opening compensation amount of the hydropower unit at the moment to be optimized according to the frequency trend of the governor; Determining the guide vane opening compensation amount of the hydropower unit at the moment to be optimized according to the absolute value of the guide vane opening compensation amount of the hydropower unit at the moment to be optimized and the positive or negative of the guide vane opening compensation amount.

[0010] Furthermore, the calculation formula of the absolute value of the guide vane opening compensation amount of the hydropower unit at the moment to be optimized is as follows:

[0011] In the formula, is the absolute value of the guide vane opening compensation at the moment t to be optimized, is the turbine power coefficient, is the water head.

[0012] Further, determining the positive or negative of the guide vane opening compensation at the moment to be optimized for the hydroelectric generating unit according to the frequency trend of the governor includes: When the frequency of the governor of the hydroelectric generating unit is in a downward trend, the guide vane opening compensation at the moment to be optimized for the hydroelectric generating unit is positive; When the frequency of the governor of the hydroelectric generating unit is in an upward trend, the guide vane opening compensation at the moment to be optimized for the hydroelectric generating unit is negative; Wherein, when the guide vane opening compensation at the moment to be optimized for the hydroelectric generating unit is positive, the calculation formula of the optimized guide vane opening value of the hydroelectric generating unit is as follows:

[0013] When the guide vane opening compensation at the moment to be optimized for the hydroelectric generating unit is negative, the calculation formula of the optimized guide vane opening value of the hydroelectric generating unit is as follows:

[0014] In the formula, is the optimized guide vane opening value of the hydroelectric generating unit at the moment t to be optimized, is the initial value of the guide vane opening of the hydroelectric generating unit at the moment t to be optimized output by the governor PID control.

[0015] The second aspect of the embodiments of the present application proposes a control system for optimizing the guide vane opening of a unit based on virtual inertia, including: An acquisition module, configured to acquire the load fluctuation amplitude at the moment to be optimized for the hydroelectric generating unit in the hydropower plant and the initial value of the guide vane opening of the hydroelectric generating unit output by the governor PID control, and collect the frequency feedback value at the moment to be optimized for the hydroelectric generating unit and the frequency deviation signals at each moment within a preset duration by using a frequency sensor; A first determination module, configured to determine the virtual inertia of the hydroelectric generating unit at the moment to be optimized according to the load fluctuation amplitude at the moment to be optimized and the frequency feedback value; A second determination module, configured to determine the guide vane opening compensation at the moment to be optimized for the hydroelectric generating unit according to the virtual inertia of the hydroelectric generating unit at the moment to be optimized, the frequency feedback value, and the frequency deviation signals at each moment within the preset duration; An optimization control module, configured to optimize the initial value of the guide vane opening based on the guide vane opening compensation at the moment to be optimized to obtain the optimized guide vane opening value of the hydroelectric generating unit, and then perform optimization control on the hydroelectric generating unit based on the optimized guide vane opening value of the hydroelectric generating unit.

[0016] A third aspect embodiment of the present application provides an electronic device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the method for optimizing the control of the guide vane opening of the unit based on virtual inertia as described in the embodiment of the first aspect.

[0017] A fourth aspect embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, it implements the method for optimizing the control of the guide vane opening of the unit based on virtual inertia as described in the embodiment of the first aspect.

[0018] The technical solutions provided by the embodiments of the present application at least bring the following beneficial effects: The present application proposes a method and system for optimizing the control of the guide vane opening of a unit based on virtual inertia. The method includes: obtaining the load fluctuation amplitude at the moment to be optimized of the hydro-generating unit in the hydropower plant and the initial value of the guide vane opening of the hydro-generating unit output by the governor PID control, and using a frequency sensor to collect the frequency feedback value at the moment to be optimized of the hydro-generating unit and the frequency deviation signals at each moment within a preset duration; determining the virtual inertia of the hydro-generating unit at the moment to be optimized according to the load fluctuation amplitude at the moment to be optimized and the frequency feedback value; determining the guide vane opening compensation amount of the hydro-generating unit at the moment to be optimized according to the virtual inertia of the hydro-generating unit at the moment to be optimized, the frequency feedback value, and the frequency deviation signals at each moment within the preset duration; optimizing the initial value of the guide vane opening based on the guide vane opening compensation amount at the moment to be optimized to obtain the optimized guide vane opening value of the hydro-generating unit, and then performing optimized control on the hydro-generating unit based on the optimized guide vane opening value of the hydro-generating unit. The technical solution proposed by the present application increases the feedforward control compensation amount of the guide vane adjustment signal through virtual inertia, realizing efficient and precise adjustment of the guide vane.

[0019] The additional aspects and advantages of the present application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become obvious and easy to understand from the following description of the embodiments in conjunction with the drawings, where: Figure 1 is a flowchart of a method for optimizing the control of the guide vane opening of a unit based on virtual inertia according to an embodiment of the present application; Figure 2 is a structural diagram of a system for optimizing the control of the guide vane opening of a unit based on virtual inertia according to an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] 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 with reference to the accompanying drawings are exemplary and are intended to explain the present application, and should not be construed as limiting the present application.

[0022] A method and system for optimizing the guide vane opening of a unit based on virtual inertia proposed in the present application. The method includes: obtaining the load fluctuation amplitude at the moment to be optimized of a hydroelectric unit in a hydropower plant and the initial value of the guide vane opening of the hydroelectric unit output by the governor PID control, and collecting the frequency feedback value at the moment to be optimized of the hydroelectric unit and the frequency deviation signals at each moment within a preset time period by using a frequency sensor; determining the virtual inertia of the hydroelectric unit at the moment to be optimized according to the load fluctuation amplitude at the moment to be optimized and the frequency feedback value; determining the guide vane opening compensation amount of the hydroelectric unit at the moment to be optimized according to the virtual inertia of the hydroelectric unit at the moment to be optimized, the frequency feedback value, and the frequency deviation signals at each moment within the preset time period; optimizing the initial value of the guide vane opening based on the guide vane opening compensation amount at the moment to be optimized to obtain the optimized guide vane opening value of the hydroelectric unit, and then performing optimized control on the hydroelectric unit based on the optimized guide vane opening value of the hydroelectric unit. The technical solution proposed in the present application increases the feedforward control compensation amount of the guide vane adjustment signal through virtual inertia, realizing efficient and accurate adjustment of the guide vane.

[0023] 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 will be described below with reference to the accompanying drawings.

[0024] Embodiment 1 Figure 1 A flowchart of a method for optimizing the guide vane opening of a unit based on virtual inertia according to an embodiment of the present application is shown in Figure 1 as follows. The method includes: Step 1: Obtain the load fluctuation amplitude at the moment to be optimized of a hydroelectric unit in a hydropower plant and the initial value of the guide vane opening of the hydroelectric unit output by the governor PID control, and collect the frequency feedback value at the moment to be optimized of the hydroelectric unit and the frequency deviation signals at each moment within a preset time period by using a frequency sensor.

[0025] It should be noted that the frequency sensor is a high-precision frequency sensor.

[0026] Step 2: Determine the virtual inertia of the hydroelectric unit at the moment to be optimized according to the load fluctuation amplitude at the moment to be optimized and the frequency feedback value.

[0027] In an embodiment of the present disclosure, the calculation formula for the virtual inertia of the hydroelectric unit at the moment to be optimized is as follows:

[0028] In the formula, is the virtual inertia of the hydropower unit at the moment 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 at the moment t to be optimized, is the load fluctuation amplitude of the hydropower unit at the moment t to be optimized, is the rated power of the hydropower unit.

[0029] Among them, can be 1 - 1.5 times the actual inertia, , are the dynamic gain coefficients optimized through simulation or experiment.

[0030] Step 3: Determine the guide vane opening compensation amount of the hydropower unit at the moment to be optimized according to the virtual inertia of the hydropower unit at the moment to be optimized, the frequency feedback value, and the frequency deviation signals at each moment within the preset duration.

[0031] In the embodiment of the present disclosure, the specific steps of Step 3 include: Step 3.1: Predict the frequency trend of the hydropower unit governor according to the frequency deviation signals at each moment within the preset duration; Among them, the specific steps of Step 3.1 include: Determine the difference values at each moment within the preset duration according to the frequency deviation signals at each moment within the preset duration; When the difference values at each moment within the preset duration are all greater than 0, predict that the frequency of the hydropower unit governor is in a downward trend; When the difference values at each moment within the preset duration are all less than 0, predict that the frequency of the hydropower unit governor is in an upward trend; Among them, each moment within the preset duration is N moments before the moment to be optimized.

[0032] It should be noted that the calculation formula of the difference values at each moment within the preset duration is as follows:

[0033] In the formula, is the difference value at the moment t - 1, is the governor given frequency at the moment t - 1, is the governor feedback frequency at the moment t - 1, is the window length.

[0034] Among them, the N moments can be 3 moments, that is, the first 3 moments before the moment t to be optimized.

[0035] Step 3.2: Determine the guide vane opening compensation amount at the moment to be optimized for the hydro-generating unit according to the frequency trend of the governor, the virtual inertia at the moment to be optimized for the hydro-generating unit, and the frequency feedback value.

[0036] Among them, the specific steps of Step 3.2 include: Determine the absolute value of the guide vane opening compensation amount at the moment to be optimized for the hydro-generating unit according to the virtual inertia at the moment to be optimized for the hydro-generating unit and the frequency feedback value; It should be noted that the calculation formula for the absolute value of the guide vane opening compensation amount at the moment to be optimized for the hydro-generating unit is as follows:

[0037] In the formula, is the absolute value of the guide vane opening compensation amount at the moment t to be optimized, is the water turbine power coefficient, is the water head.

[0038] Determine the positive or negative of the guide vane opening compensation amount at the moment to be optimized for the hydro-generating unit according to the frequency trend of the governor; It should be noted that when the frequency of the governor of the hydro-generating unit is in a downward trend, the guide vane opening compensation amount at the moment to be optimized for the hydro-generating unit is positive, and it is necessary to drive the guide vane to open quickly; When the frequency of the governor of the hydro-generating unit is in an upward trend, the guide vane opening compensation amount at the moment to be optimized for the hydro-generating unit is negative, and it is necessary to drive the guide vane to close quickly.

[0039] Determine the guide vane opening compensation amount at the moment to be optimized for the hydro-generating unit according to the absolute value of the guide vane opening compensation amount at the moment to be optimized for the hydro-generating unit and the positive or negative of the guide vane opening compensation amount.

[0040] It should be noted that the absolute value of the guide vane opening compensation amount at the moment t to be optimized needs to meet the dynamic amplitude constraint to prevent the guide vane opening from exceeding the mechanical limit and ensure the safety of the equipment. The calculation formula for its dynamic amplitude constraint is as follows:

[0041] In the formula, is the guide vane opening compensation power at the moment t to be optimized, .

[0042] Step 4: Optimize the initial value of the guide vane opening based on the guide vane opening compensation amount at the moment to be optimized to obtain the optimized guide vane opening value of the hydro-generating unit, and then perform optimized control on the hydro-generating unit based on the optimized guide vane opening value of the hydro-generating unit.

[0043] In the embodiment of the present disclosure, when the guide vane opening compensation amount at the moment to be optimized of the hydropower unit is a positive value, the calculation formula for the optimized guide vane opening value of the hydropower unit is as follows:

[0044] When the guide vane opening compensation amount at the moment to be optimized of the hydropower unit is a negative value, the calculation formula for the optimized guide vane opening value of the hydropower unit is as follows:

[0045] In the formula, is the optimized guide vane opening value of the hydropower unit at the moment t to be optimized, is the initial guide vane opening value of the hydropower unit at the moment t to be optimized output by the governor PID control.

[0046] It should be noted that based on the guide vane opening optimization control method of the unit based on virtual inertia proposed in this embodiment, when conducting guide vane adjustment tests, it can be obtained that when the load changes rapidly, the response speed and frequency regulation accuracy of the traditional governor and the guide vane pre-adjustment system of the present invention are tested. After using the present invention, the guide vane adjustment response time is reduced by 30%, and the frequency deviation recovery time is shortened by 25%.

[0047] In summary, a guide vane opening optimization control method of a unit based on virtual inertia proposed in this embodiment, through virtual inertia, and dynamically predicting the frequency trend, increases the feedforward control compensation amount of the guide vane adjustment signal, realizing efficient and accurate adjustment of the guide vane.

[0048] Embodiment 2 Figure 2 The following is a structural diagram of a guide vane opening optimization control system of a unit based on virtual inertia provided according to an embodiment of the present application, as Figure 2 shown. The system includes: An acquisition module 100, configured to acquire the load fluctuation amplitude at the moment to be optimized of the hydropower unit in the hydropower plant and the initial guide vane opening value of the hydropower unit output by the governor PID control, and collect the frequency feedback value at the moment to be optimized of the hydropower unit and the frequency deviation signals at each moment within a preset duration by using a frequency sensor; A first determination module 200, configured to determine the virtual inertia of the hydropower unit at the moment to be optimized according to the load fluctuation amplitude at the moment to be optimized and the frequency feedback value; Wherein, the calculation formula for the virtual inertia of the hydropower unit at the moment to be optimized is as follows:

[0049] In the formula, is the virtual inertia of the hydropower unit at the moment 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 at the moment t to be optimized, is the load fluctuation amplitude of the hydropower unit at the moment t to be optimized, is the rated power of the hydropower unit.

[0050] The second determination module 300 is configured to determine the guide vane opening compensation amount of the hydropower unit at the moment to be optimized according to the virtual inertia of the hydropower unit at the moment to be optimized, the frequency feedback value, and the frequency deviation signals at each moment within the preset duration; The optimization control module 400 is configured to optimize the initial value of the guide vane opening based on the guide vane opening compensation amount at the moment to be optimized to obtain the optimized guide vane opening value of the hydropower unit, and then perform optimization control on the hydropower unit based on the optimized guide vane opening value of the hydropower unit.

[0051] In the embodiment of the present disclosure, the second determination module 300 is further configured to: Predict the frequency trend of the governor of the hydropower unit according to the frequency deviation signals at each moment within the preset duration; Determine the guide vane opening compensation amount of the hydropower unit at the moment to be optimized according to the frequency trend of the governor, the virtual inertia of the hydropower unit at the moment to be optimized, and the frequency feedback value.

[0052] Further, the second determination module 300 is further configured to: Respectively determine the difference values at each moment within the preset duration according to the frequency deviation signals at each moment within the preset duration; When the difference values at each moment within the preset duration are all greater than 0, predict that the frequency of the governor of the hydropower unit is in a downward trend; When the difference values at each moment within the preset duration are all less than 0, predict that the frequency of the governor of the hydropower unit is in an upward trend; Wherein, each moment within the preset duration is N moments before the moment to be optimized.

[0053] Further, the second determination module 300 is further configured to: Determine the absolute value of the guide vane opening compensation amount of the hydropower unit at the moment to be optimized according to the virtual inertia of the hydropower unit at the moment to be optimized and the frequency feedback value; Wherein, the calculation formula of the absolute value of the guide vane opening compensation amount of the hydropower unit at the moment to be optimized is as follows:

[0054] In the formula, is the absolute value of the guide vane opening compensation amount at the moment t to be optimized, is the turbine power coefficient, is the water head.

[0055] Determine the positive or negative value of the guide vane opening compensation amount at the moment to be optimized of the hydropower unit according to the frequency trend of the governor; Determine the guide vane opening compensation amount at the moment to be optimized of the hydropower unit according to the absolute value of the guide vane opening compensation amount at the moment to be optimized of the hydropower unit and the positive or negative value of the guide vane opening compensation amount.

[0056] Further, the second determination module 300 is further configured to: When the frequency of the governor of the hydropower unit is in a downward trend, the guide vane opening compensation amount at the moment to be optimized of the hydropower unit is a positive value; When the frequency of the governor of the hydropower unit is in an upward trend, the guide vane opening compensation amount at the moment to be optimized of the hydropower unit is a negative value.

[0057] In the embodiment of the present disclosure, the optimization control module 400 is further configured to: When the guide vane opening compensation amount at the moment to be optimized of the hydropower unit is a positive value, the calculation formula of the optimized guide vane opening value of the hydropower unit is as follows:

[0058] When the guide vane opening compensation amount at the moment to be optimized of the hydropower unit is a negative value, the calculation formula of the optimized guide vane opening value of the hydropower unit is as follows:

[0059] In the formula, is the optimized guide vane opening value of the hydropower unit at the moment to be optimized t, is the initial value of the guide vane opening of the hydropower unit at the moment to be optimized t output by the governor PID control.

[0060] In summary, a guide vane opening optimization control system for a unit based on virtual inertia proposed in this embodiment, through virtual inertia, and dynamically predicting the frequency trend, increases the feedforward control compensation amount of the guide vane adjustment signal, and realizes efficient and accurate adjustment of the guide vane.

[0061] Embodiment III To implement the above embodiment, the present disclosure also proposes an electronic device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the method for optimizing the guide vane opening of a unit based on virtual inertia as described in Embodiment I.

[0062] Embodiment IV To implement the above embodiments, the present disclosure also provides a computer-readable storage medium having a computer program stored thereon, and when the program is executed by a processor, it implements the optimized control method for the guide vane opening of the unit based on virtual inertia as described in Embodiment 1.

[0063] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0064] Any process or method description shown in a flowchart or described in other ways herein can be understood to represent a module, segment, or portion of code including one or more executable instructions for implementing a customized logic function or process, and the scope of the preferred embodiments of the present application includes additional implementations, where the functions may be executed in a substantially simultaneous manner or in an opposite order according to the functions involved, rather than in the order shown or discussed, which should be understood by those skilled in the art of the embodiments of the present application.

[0065] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. An optimized control method for the guide vane opening of a unit based on virtual inertia, characterized in that, The method includes: Obtaining the load fluctuation amplitude at the moment to be optimized of the hydro-generator set in the hydropower plant and the initial value of the guide vane opening of the hydro-generator set output by the governor PID control, and collecting the frequency feedback value at the moment to be optimized of the hydro-generator set and the frequency deviation signals at each moment within a preset duration by using a frequency sensor; Determining the virtual inertia of the hydro-generator set at the moment to be optimized according to the load fluctuation amplitude and the frequency feedback value at the moment to be optimized; Determining the guide vane opening compensation amount at the moment to be optimized of the hydro-generator set according to the virtual inertia, the frequency feedback value, and the frequency deviation signals at each moment within the preset duration of the hydro-generator set at the moment to be optimized; Optimizing the initial value of the guide vane opening based on the guide vane opening compensation amount at the moment to be optimized to obtain the optimized guide vane opening value of the hydro-generator set, and then performing optimized control on the hydro-generator set based on the optimized guide vane opening value of the hydro-generator set.

2. The optimized control method for the guide vane opening of the unit based on virtual inertia according to claim 1, wherein, The calculation formula of the virtual inertia of the hydro-generator set at the moment to be optimized is as follows: In the formula, is the virtual inertia of the hydropower unit at the moment 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 at the moment t to be optimized, is the load fluctuation amplitude of the hydropower unit at the moment t to be optimized, is the rated power of the hydropower unit.

3. The optimized control method for the guide vane opening of the unit based on virtual inertia according to claim 2, characterized in that The determining the guide vane opening compensation amount at the moment to be optimized of the hydro-generator set according to the virtual inertia, the frequency feedback value, and the frequency deviation signals at each moment within the preset duration of the hydro-generator set at the moment to be optimized includes: Predicting the frequency trend of the hydro-generator governor according to the frequency deviation signals at each moment within the preset duration; Determining the guide vane opening compensation amount at the moment to be optimized of the hydro-generator set according to the frequency trend of the governor, the virtual inertia, and the frequency feedback value of the hydro-generator set at the moment to be optimized.

4. The optimized control method for the guide vane opening of the unit based on virtual inertia according to claim 3, characterized in that The predicting the frequency trend of the hydro-generator governor according to the frequency deviation signals at each moment within the preset duration includes: Respectively determining the difference values at each moment within the preset duration according to the frequency deviation signals at each moment within the preset duration; When the difference values at each moment within the preset duration are all greater than 0, predicting that the frequency of the hydro-generator governor is in a downward trend; When the difference values at each moment within the preset duration are all less than 0, predicting that the frequency of the hydro-generator governor is in an upward trend; Wherein, each moment within the preset duration is N moments before the moment to be optimized.

5. The optimized control method for the guide vane opening of the unit based on virtual inertia according to claim 4, characterized in that The determining the guide vane opening compensation amount at the moment to be optimized of the hydro-generator set according to the frequency trend of the governor, the virtual inertia, and the frequency feedback value of the hydro-generator set at the moment to be optimized includes: Determining the absolute value of the guide vane opening compensation amount at the moment to be optimized of the hydro-generator set according to the virtual inertia and the frequency feedback value of the hydro-generator set at the moment to be optimized; Determining the positive or negative of the guide vane opening compensation amount at the moment to be optimized of the hydro-generator set according to the frequency trend of the governor; Determining the guide vane opening compensation amount at the moment to be optimized of the hydro-generator set according to the absolute value of the guide vane opening compensation amount at the moment to be optimized of the hydro-generator set and the positive or negative of the guide vane opening compensation amount.

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

7. The optimized control method for the guide vane opening of the unit based on virtual inertia according to claim 6, characterized in that The determining the positive or negative of the guide vane opening compensation amount at the moment to be optimized of the hydro-generator set according to the frequency trend of the governor includes: When the frequency of the hydro-generator governor is in a downward trend, the guide vane opening compensation amount at the moment to be optimized of the hydro-generator set is positive; When the frequency of the hydro-generator unit governor shows an upward trend, the compensation amount of the guide vane opening at the moment to be optimized of the hydro-generator unit is negative; Among them, when the compensation amount of the guide vane opening at the moment to be optimized of the hydro-generator unit is positive, the calculation formula of the optimized guide vane opening value of the hydro-generator unit is as follows: When the compensation amount of the guide vane opening at the moment to be optimized of the hydro-generator unit is negative, the calculation formula of the optimized guide vane opening value of the hydro-generator unit is as follows: Wherein, is the optimized wicket gate opening value of the hydro-generating unit at the moment t to be optimized, is the initial wicket gate opening value of the hydro-generating unit at the moment t to be optimized output by the governor PID control.

8. An optimized control system for the guide vane opening of a unit based on virtual inertia, characterized in that, The system includes: An acquisition module, configured to acquire the load fluctuation amplitude at the moment to be optimized of the hydro-generator unit in the hydropower plant and the initial value of the guide vane opening of the hydro-generator unit output by the governor PID control, and collect the frequency feedback value at the moment to be optimized of the hydro-generator unit and the frequency deviation signals at each moment within a preset duration by using a frequency sensor; A first determination module, configured to determine the virtual inertia of the hydro-generator unit at the moment to be optimized according to the load fluctuation amplitude and the frequency feedback value at the moment to be optimized; A second determination module, configured to determine the compensation amount of the guide vane opening at the moment to be optimized of the hydro-generator unit according to the virtual inertia, the frequency feedback value, and the frequency deviation signals at each moment within the preset duration of the hydro-generator unit at the moment to be optimized; An optimization control module, configured to optimize the initial value of the guide vane opening based on the compensation amount of the guide vane opening at the moment to be optimized to obtain the optimized guide vane opening value of the hydro-generator unit, and then perform optimization control on the hydro-generator unit based on the optimized guide vane opening value of the hydro-generator unit.

9. An electronic device, characterized in that, It includes: A memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the method for optimizing the guide vane opening of the unit based on virtual inertia as described in any one of claims 1-7.

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

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