An active power regulation method and system taking into account instantaneous energy distribution efficiency

Abstract

This invention provides an active power regulation method and system that considers instantaneous energy distribution efficiency, relating to the field of wind power grid-connected control technology. The invention establishes a synchronized operation system model based on the system parameters of the wind turbine and synchronous machine, determines the total inherent active power regulation coefficient and synchronous torque coefficient of the system to obtain the conservative instantaneous power of the synchronized system; introduces an active power regulation proportional coefficient into the model and constructs an instantaneous energy function during synchronized system oscillation, analyzing the instantaneous energy distribution law between synchronized units; after a disturbance, the instantaneous energy distribution efficiency is determined based on the instantaneous energy of the synchronous machine, a target efficiency is given, and the active power regulation proportional coefficient is solved based on the total instantaneous energy conservation, thereby calculating the design value of the active power regulation coefficient and setting it in the active power controller of the wind turbine unit, so that when the system detects frequency or power disturbances, the wind turbine participates in regulation according to the design value, thereby improving the power oscillation suppression capability.

Description

Technical Field

[0001] This invention relates to the field of wind power grid connection control technology, and in particular to an active power regulation method and system that takes into account instantaneous energy distribution efficiency. Background Technology

[0002] With the increasing penetration rate of new energy sources, the power support capacity and damping of power systems are continuously declining, significantly increasing the risk of inducing system frequency instability and power oscillations. Therefore, virtual inertia control and power oscillation suppression technologies have been extensively studied to enhance the power support capacity of wind turbines. However, there is a contradiction between virtual inertia and damping coefficients in design. Under existing virtual inertia control strategies, increasing the virtual inertia coefficient increases the risk of system resonance; conversely, increasing damping to suppress system power oscillations leads to a decrease in system response speed. Furthermore, after wind turbines are connected to the grid, the lack of physical guidance for simultaneously optimizing both from the perspective of global instantaneous energy transfer and distribution means that the oscillation suppression effect and the parameter design in the controller structure still need further optimization. Introducing an active power regulation coefficient to establish a power support relationship between wind turbines and the system can provide a new solution for further improving the grid connection safety of new energy units.

[0003] Therefore, there is an urgent need for a design method for active power regulation parameters that takes into account instantaneous energy distribution efficiency, so as to clarify the intrinsic relationship between power support and system damping capability, and to take into account both system power support and power oscillation suppression functions. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the purpose of this invention is to provide an active power regulation method and system that takes into account instantaneous energy distribution efficiency. By establishing an instantaneous energy function model of the system, the distribution law of instantaneous energy among co-tuning units after the introduction of active power regulation coefficient is quantitatively analyzed, thereby obtaining the design value of active power regulation coefficient based on target energy distribution efficiency, and improving the power oscillation suppression potential of wind turbines.

[0005] To achieve the above objectives, the present invention provides the following solution: A method for regulating active power that takes into account instantaneous energy distribution efficiency includes: Based on the system parameters of the wind turbine and the synchronous machine, a system model for the wind turbine and the synchronous machine to operate in sync is established; the system model corresponding to the wind turbine and the synchronous machine operating in sync is called the sync system. Based on the system model, the total inherent active power regulation coefficient and the system synchronous torque coefficient are determined to determine the conservative instantaneous power of the synchronized system. An active power regulation ratio coefficient is introduced into the system model to construct the instantaneous energy function when the synchronous system oscillates. The distribution law of instantaneous energy among synchronous units is analyzed based on the instantaneous energy function so that the instantaneous power distribution between the wind turbine and the synchronous machine is proportional to its inherent active power regulation coefficient. After a disturbance occurs in the synchronization system, the instantaneous energy distribution efficiency is determined based on the instantaneous energy of the synchronizer and the assumption that the instantaneous energy is concentrated in the synchronizer at the initial moment. Given a target instantaneous energy distribution efficiency, an equation for solving the active power regulation ratio coefficient is established based on the total instantaneous energy conservation of the coherent system, and the solvability condition is determined. The active power regulation ratio coefficient is obtained when the solvability condition is met. Taking into account the instantaneous energy distribution efficiency and power support requirements, the design value of the active power regulation coefficient is calculated based on the correspondence between the instantaneous energy distribution efficiency and the active power regulation coefficient. The active power regulation coefficient design value is set in the active power controller of the wind turbine, so that when the synchronization system detects frequency or power disturbances, the wind turbine participates in grid regulation according to the active power regulation coefficient design value.

[0006] Preferably, based on the system parameters of the wind turbine and the synchronous machine, a system model for the synchronized operation of the wind turbine and the synchronous machine is established, including: Based on the system parameters of the wind turbine and the synchronizer, a linearized motion equation is established for the wind turbine and the synchronizer to operate in sync. The total inherent active power regulation coefficient and the synchronous torque coefficient of the system are determined based on the linearized equation of motion.

[0007] Preferably, the total inherent active power regulation coefficient and the synchronous torque coefficient of the system are determined based on the system model to determine the conservative instantaneous power of the synchronized system, including: The conservative instantaneous power of the synchronized system is determined based on the total inherent active power regulation coefficient of the system and the synchronous torque coefficient of the system. The instantaneous power of the synchronizing machine and the instantaneous power of the fan are determined based on the conservative instantaneous power of the sonication system. The distribution of the instantaneous power of the synchronizing machine and the instantaneous power of the wind turbine is proportional to the corresponding inherent active power regulation coefficient.

[0008] Preferably, an active power regulation proportional coefficient is introduced into the system model to construct the instantaneous energy function during the oscillation of the synchronized system, and the distribution law of instantaneous energy among synchronized units is analyzed based on the instantaneous energy function, including: The instantaneous energy function is constructed using the oscillation process of the system model as the object; An instantaneous energy distribution angle is introduced into the instantaneous energy function to characterize the distribution state of instantaneous energy among coherent units; An amplitude parameter is introduced into the instantaneous energy function to characterize the oscillation amplitude; The synchronous torque coefficient ratio is introduced into the instantaneous energy function to characterize the synchronous torque coupling relationship.

[0009] Preferably, after a disturbance occurs in the synchronization system, the instantaneous energy distribution efficiency is determined based on the instantaneous energy of the synchronizer and under the assumption that the instantaneous energy is concentrated in the synchronizer at the initial moment, including: After a disturbance occurs in the synchronization system, the instantaneous energy of the synchronizing machine is determined, and a new time scale is introduced to characterize the dynamic process after the disturbance. Under the assumption that the instantaneous energy is concentrated in the synchronizing machine at the initial moment, determine the relationship between the instantaneous energy of the synchronizing machine and time after the disturbance; The instantaneous energy allocation efficiency is determined based on the instantaneous energy of the synchronizer after the disturbance and the instantaneous energy of the synchronizer at the initial moment.

[0010] Preferably, given a target instantaneous energy distribution efficiency, an equation for solving the active power regulation ratio coefficient is established based on the total instantaneous energy conservation of the coherent system, and solvability conditions are determined. The active power regulation ratio coefficient is obtained by solving for the solvability conditions, including: Based on the conservation of total instantaneous energy of the homology system, a relational formula is established to determine the angle parameters in the instantaneous energy function; Substitute the angle parameter into the equation related to the instantaneous energy distribution efficiency of the target to construct an equation for solving the active power regulation ratio coefficient; Determine the solvable conditions that make the equation have a solution; When the solvable condition is met, the active power regulation ratio coefficient corresponding to the target instantaneous energy distribution efficiency is obtained by solving the problem.

[0011] Preferably, taking into account the instantaneous energy distribution efficiency and power support requirements, the design value of the active power regulation coefficient is calculated based on the correspondence between the instantaneous energy distribution efficiency and the active power regulation coefficient, including: Establish a correspondence between the instantaneous energy allocation efficiency and the active power regulation coefficient based on the instantaneous energy allocation efficiency; Based on the aforementioned correspondence and taking into account the power support requirements, the design value of the active power regulation coefficient is calculated.

[0012] Preferably, the active power regulation coefficient design value is set in the active power controller of the wind turbine, so that when the synchronization system detects frequency or power disturbances, the wind turbine participates in grid regulation according to the active power regulation coefficient design value, including: The design value of the active power regulation coefficient is written into the active power controller of the wind turbine, and used as the active power regulation parameter of the active power controller; When the synchronization system detects frequency disturbances or power disturbances, the active power controller generates an active power adjustment command based on the active power adjustment parameters. The active power output of the wind turbine is adjusted according to the active power adjustment command to participate in grid regulation.

[0013] Preferably, based on the system parameters of the wind turbine and the synchronous machine, a system model for the synchronized operation of the wind turbine and the synchronous machine is established, including: Obtain the system parameters of the synchronizer, wherein the system parameters include at least the inherent active power regulation coefficient of the synchronizer; Obtain the system parameters of the wind turbine, wherein the system parameters include at least the inherent active power regulation coefficient of the wind turbine; The total inherent active power regulation coefficient of the system is determined based on the inherent active power regulation coefficient of the synchronous machine and the inherent active power regulation coefficient of the fan.

[0014] An active power regulation system that takes into account instantaneous energy distribution efficiency includes: The system modeling unit is used to establish a system model of the wind turbine and the synchronous machine operating in sync based on the system parameters of the wind turbine and the synchronous machine; the system model corresponding to the wind turbine and the synchronous machine operating in sync is called the sync system. The parameter determination unit is used to determine the total inherent active power regulation coefficient and the synchronous torque coefficient of the system based on the system model, so as to determine the conservative instantaneous power of the synchronized system. The instantaneous energy analysis unit is used to introduce the active power regulation ratio coefficient into the system model, construct the instantaneous energy function when the synchronous system oscillates, and analyze the distribution law of instantaneous energy among synchronous units based on the instantaneous energy function so that the instantaneous power distribution between the wind turbine and the synchronous machine is proportional to its inherent active power regulation coefficient. The disturbance response calculation unit is used to determine the instantaneous energy distribution efficiency based on the instantaneous energy of the synchronizer and the assumption that the instantaneous energy is concentrated in the synchronizer at the initial moment after a disturbance occurs in the synchronizer system. The proportional coefficient solving unit is used to establish an equation for solving the active power regulation proportional coefficient based on the total instantaneous energy conservation of the coherent system, given a target instantaneous energy distribution efficiency, and determine the solvable conditions. When the solvable conditions are met, the active power regulation proportional coefficient is obtained. The regulation coefficient calculation unit is used to take into account the instantaneous energy distribution efficiency and power support requirements, and calculate the design value of the active power regulation coefficient based on the correspondence between the instantaneous energy distribution efficiency and the active power regulation coefficient. The control execution unit is used to set the design value of the active power regulation coefficient in the active power controller of the wind turbine, so that when the synchronization system detects frequency or power disturbances, the wind turbine participates in grid regulation according to the design value of the active power regulation coefficient.

[0015] The present invention discloses the following technical effects: This invention starts from the essential system attribute of instantaneous energy function, analyzes the quantitative relationship of instantaneous energy distribution between wind turbine and system after introducing active power regulation coefficient, and proposes a design method and system for active power regulation coefficient that takes into account instantaneous energy distribution efficiency and system power support requirements. By simultaneously considering system power oscillation suppression requirements and power support requirements to optimize the active power regulation coefficient, the wind turbine can meet different support requirements while taking into account system power support and power oscillation suppression functions, thereby significantly improving the system's damping performance and transient stability. In addition, the method proposed in this invention does not require complex calculations or online identification; it only needs to obtain the inherent active power regulation coefficient of the synchronous machine to complete the design, which has strong engineering practicality and promotional value. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A flowchart of the method provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the technical route provided in the embodiments of the present invention; Figure 3 Instantaneous energy transfer efficiency under different active power regulation ratios provided in embodiments of the present invention η curve; Figure 4 This is a schematic diagram of the system model structure provided in an embodiment of the present invention; Figure 5 The power response curves of the synchronous machine and wind turbine provided in the embodiments of the present invention. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] The purpose of this invention is to provide an active power regulation method and system that takes into account instantaneous energy distribution efficiency. By constructing a coherent system model and designing active power regulation parameters based on instantaneous energy distribution efficiency, quantitative optimization of dynamic energy distribution between wind turbines and synchronous machines is achieved, giving wind turbines clear physical constraints and mathematical basis for participating in grid regulation, thereby improving the frequency support capability and transient stability of the grid-connected system.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 A flowchart of the method provided in the embodiments of the present invention, such as Figure 1 As shown, the present invention provides an active power regulation method that takes into account instantaneous energy distribution efficiency, comprising: Step 100: Based on the system parameters of the wind turbine and the synchronous machine, establish a system model for the wind turbine and the synchronous machine to operate in sync; the system model corresponding to the wind turbine and the synchronous machine operating in sync is called the sync system; Step 200: Determine the total inherent active power regulation coefficient and the synchronous torque coefficient of the system based on the system model, so as to determine the conservative instantaneous power of the synchronized system; Step 300: Introduce the active power regulation ratio coefficient into the system model, construct the instantaneous energy function when the synchronous system oscillates, and analyze the distribution law of instantaneous energy among synchronous units based on the instantaneous energy function so that the instantaneous power distribution between the wind turbine and the synchronous machine is proportional to its inherent active power regulation coefficient. Step 400: After a disturbance occurs in the synchronization system, determine the instantaneous energy distribution efficiency based on the instantaneous energy of the synchronizer and under the assumption that the instantaneous energy is concentrated in the synchronizer at the initial moment; Step 500: Given the target instantaneous energy distribution efficiency, establish an equation for solving the active power regulation ratio coefficient based on the total instantaneous energy conservation of the coherent system and determine the solvable conditions. When the solvable conditions are met, the active power regulation ratio coefficient is obtained by solving the equation. Step 600: Taking into account instantaneous energy distribution efficiency and power support requirements, calculate the design value of the active power regulation coefficient based on the correspondence between instantaneous energy distribution efficiency and active power regulation coefficient; Step 700: Set the active power regulation coefficient design value in the active power controller of the wind turbine so that when the synchronization system detects frequency or power disturbances, the wind turbine participates in grid regulation according to the active power regulation coefficient design value.

[0022] like Figure 2 As shown, the technical approach of this embodiment includes the following steps: Step 1: Establish a system model for the synchronized operation of the wind turbine and the synchronous machine; Step 2: Introduce the active power regulation proportional coefficient μ Analyze the distribution pattern of instantaneous energy among synchronously controlled units; Step 3: Based on the target instantaneous energy allocation efficiency η Design active power regulation ratio coefficient μ ; Step 4: Calculate the design value of the active power regulation coefficient, taking into account instantaneous energy distribution efficiency and power support requirements. K ; Step 5: K The settings are configured in the active power controller of the wind turbine.

[0023] Figure 3 It is a three-dimensional curve of the virtual inertial design of a virtual synchronizer, such as... Figure 3 As shown, its instantaneous energy distribution efficiency for the target is When, the vertical axis is the corresponding Values.

[0024] Consider a doubly-fed induction generator (DFIG) wind turbine employing active power control and operating in sync with a synchronizing mechanism. The linearized equations of motion for the system are: (1) in, H Σ = H g + H w The total inherent active power regulation coefficient of the system. K Σ This is the system synchronization torque coefficient.

[0025] The conservative instantaneous power of the system is expressed as: (2) Due to the synchronous operation Δ δ g =Δ δ w =Δ δ Δ ω g =Δ ω w =Δ ω The instantaneous power distribution between the fan and the synchronous machine is proportional to its inherent active power regulation coefficient.

[0026] The instantaneous power of the synchronous machine is expressed as: (3) The instantaneous power of a wind turbine is expressed as: (4) To analyze the instantaneous energy transfer process in the system, an instantaneous energy function is constructed for the system oscillation: (5) In the formula, β For instantaneous energy distribution angle, m is a constant and m cos α , m sin α Indicates amplitude. c n This is the ratio of synchronous torque coefficients.

[0027] After a disturbance occurs in the system, the instantaneous energy of the synchronizer is: (6) In the formula μ This is the active power regulation ratio coefficient. τ This is a new time scale. Assuming that at the initial moment, all instantaneous energy is concentrated on the synchronizer, then after a disturbance, the expression for the synchronizer's instantaneous energy is: (7) The instantaneous energy distribution efficiency is: (8) Substituting equations (6) and (7) into the equations, we get: (9) According to the conservation of the total instantaneous energy of the system, when hour, α It can be represented as: (10) From equation (10), we get: (11) Substituting equation (11) into equation (10) yields: (12) For the above equation to have a solution, the following condition must be met: (13) Given instantaneous energy distribution efficiency Under these circumstances, the active power regulation ratio of the system μ It can be represented as: (14) The parameters of the virtual synchronizer can be designed based on the relationship between the target instantaneous energy transfer efficiency and the active power regulation coefficient: (15) To verify the control effect of the grid-connected wind turbine structure and the active power regulation method considering instantaneous energy distribution efficiency, this invention utilizes DIgSILENT / PowerFactory to build a system as follows: Figure 4 The simulation system shown includes a grid-connected wind turbine structure comprising a doubly-fed induction generator (DFIG), a synchronously operating synchronous generator (SG1), a reference motor (SG0), and line loads. The control strategy employed is to adjust the active power regulation coefficient parameters of the virtual synchronous control by considering the system's power support and instantaneous energy distribution requirements. K It achieves the control effects of frequency regulation and oscillation suppression.

[0028] At 2s, at bus B 12 A three-phase short-circuit fault is set up, and the fault is cleared after 2.1 seconds to induce system power oscillation. For example... Figure 5 As shown, four operating conditions were set. In condition 1, without any additional control of the wind turbine, the system experienced a power oscillation lasting 6.23 seconds due to its low inertia and low damping characteristics. In condition 2, under virtual inertia control, although the power recovery time of the synchronous machine was improved, the oscillation amplitude suppression effect was very limited. In condition 3, by introducing active power regulation control on the basis of virtual inertia control, both the power oscillation amplitude and recovery time of the system were significantly improved. In condition 4, as the active power regulation coefficient further increased, the power oscillation suppression effect of the system weakened. Therefore, by reasonably setting the active power regulation coefficient, the system can achieve the optimal oscillation suppression effect, and the grid-friendly performance of the wind turbine grid-connected system is improved.

[0029] Corresponding to the above method, this embodiment also provides an active power regulation system that takes into account instantaneous energy distribution efficiency, including: The system modeling unit is used to establish a system model of the wind turbine and the synchronous machine operating in sync based on the system parameters of the wind turbine and the synchronous machine; the system model corresponding to the wind turbine and the synchronous machine operating in sync is called the sync system. The parameter determination unit is used to determine the total inherent active power regulation coefficient and the synchronous torque coefficient of the system based on the system model, so as to determine the conservative instantaneous power of the synchronized system. The instantaneous energy analysis unit is used to introduce the active power regulation ratio coefficient into the system model, construct the instantaneous energy function when the synchronous system oscillates, and analyze the distribution law of instantaneous energy among synchronous units based on the instantaneous energy function, so that the instantaneous power distribution between the wind turbine and the synchronous machine is proportional to its inherent active power regulation coefficient. The disturbance response calculation unit is used to determine the instantaneous energy distribution efficiency based on the instantaneous energy of the synchronizer and the assumption that the instantaneous energy is concentrated in the synchronizer at the initial moment after a disturbance occurs in the synchronizer system. The proportional coefficient solving unit is used to determine the active power regulation proportional coefficient based on the total instantaneous energy conservation of the coherent system, and to determine the solvable conditions. When the solvable conditions are met, the active power regulation proportional coefficient is obtained. The regulation coefficient calculation unit is used to take into account instantaneous energy distribution efficiency and power support requirements, and calculates the design value of the active power regulation coefficient based on the correspondence between instantaneous energy distribution efficiency and active power regulation coefficient. The control execution unit is used to set the design value of the active power regulation coefficient in the active power controller of the wind turbine, so that when the synchronization system detects frequency or power disturbances, the wind turbine participates in grid regulation according to the design value of the active power regulation coefficient.

[0030] The beneficial effects of this invention are as follows: (1) This invention establishes a system model for the synchronized operation of wind turbine generators and synchronous machines, and determines the total inherent active power regulation coefficient and the system synchronous torque coefficient under a unified model framework. This enables wind turbines to participate in active power regulation without being set based on empirical parameters or local control logic, but rather based on the overall dynamic characteristics of the synchronized system for parameter design. This solves the problem of unclear coupling relationship between wind turbine regulation parameters and grid synchronous machine dynamics in the prior art, and improves the physical consistency of regulation design.

[0031] (2) The present invention introduces the active power regulation ratio coefficient into the system model and constructs the instantaneous energy function when the synchronous system oscillates. The dynamic power support relationship between the wind turbine and the synchronous machine is characterized by the instantaneous energy distribution law. The active power regulation problem is transformed into an energy distribution problem for analysis. This overcomes the shortcomings of the existing technology that only focuses on the control design from the perspective of power or frequency deviation and ignores the dynamic coupling of energy between units, so that the regulation design has a clear energy physics basis.

[0032] (3) After a disturbance occurs in the synchronization system, the present invention determines the instantaneous energy distribution efficiency based on the instantaneous energy of the synchronizing machine and combined with the initial energy concentration assumption. The dynamic energy transfer process after the disturbance is quantified into a calculable efficiency index, thereby establishing a quantitative relationship between the disturbance response performance and the control parameters. This avoids the method of relying on repeated simulation and trial adjustment or empirical tuning in the prior art, and improves the certainty and interpretability of parameter determination.

[0033] (4) Under the condition of a given target instantaneous energy distribution efficiency, the present invention establishes an equation for solving the active power regulation ratio coefficient based on the conservation of total instantaneous energy of the coherent system, and sets solvable conditions for solving the equation. This makes the determination of the active power regulation ratio coefficient have clear mathematical constraints and physical boundaries, which solves the problem that the regulation ratio lacks system-level constraints in the prior art and is prone to over-support or under-support, thus enhancing the stability and robustness of the control strategy.

[0034] (5) The present invention further calculates the design value of the active power regulation coefficient based on the instantaneous energy distribution efficiency and power support requirements, and sets the design value in the active power controller of the wind turbine, so that when the wind turbine detects frequency or power disturbances in the synchronization system, it can participate in grid regulation according to the energy distribution optimization results, thereby realizing the coordination and unity of the active power support capability of the wind turbine and the dynamic response of the grid synchronization machine, and improving the frequency support capability and overall transient stability level of the wind power grid connection system under disturbance conditions.

[0035] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to the method section.

[0036] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for regulating active power considering instantaneous energy distribution efficiency, characterized in that, include: Based on the system parameters of the wind turbine and the synchronous machine, a system model for the synchronized operation of the wind turbine and the synchronous machine is established. The system model corresponding to the wind turbine and synchronous machine operating in sync is a sync system. Based on the system model, the total inherent active power regulation coefficient and the system synchronous torque coefficient are determined to determine the conservative instantaneous power of the synchronized system. An active power regulation ratio coefficient is introduced into the system model to construct the instantaneous energy function when the synchronous system oscillates. The distribution law of instantaneous energy among synchronous units is analyzed based on the instantaneous energy function so that the instantaneous power distribution between the wind turbine and the synchronous machine is proportional to its inherent active power regulation coefficient. After a disturbance occurs in the synchronization system, the instantaneous energy distribution efficiency is determined based on the instantaneous energy of the synchronizer and the assumption that the instantaneous energy is concentrated in the synchronizer at the initial moment. Given a target instantaneous energy distribution efficiency, an equation for solving the active power regulation ratio coefficient is established based on the total instantaneous energy conservation of the coherent system, and the solvability condition is determined. The active power regulation ratio coefficient is obtained when the solvability condition is met. Taking into account the instantaneous energy distribution efficiency and power support requirements, the design value of the active power regulation coefficient is calculated based on the correspondence between the instantaneous energy distribution efficiency and the active power regulation coefficient. The active power regulation coefficient design value is set in the active power controller of the wind turbine, so that when the synchronization system detects frequency or power disturbances, the wind turbine participates in grid regulation according to the active power regulation coefficient design value.

2. The active power regulation method considering instantaneous energy distribution efficiency according to claim 1, characterized in that, Based on the system parameters of the wind turbine and the synchronous machine, a system model for the synchronized operation of the wind turbine and the synchronous machine is established, including: Based on the system parameters of the wind turbine and the synchronizer, a linearized motion equation is established for the wind turbine and the synchronizer to operate in sync. The total inherent active power regulation coefficient and the synchronous torque coefficient of the system are determined based on the linearized equation of motion.

3. The active power regulation method considering instantaneous energy distribution efficiency according to claim 1, characterized in that, Based on the system model, the total inherent active power regulation coefficient and the system synchronous torque coefficient are determined to determine the conservative instantaneous power of the synchronized system, including: The conservative instantaneous power of the synchronized system is determined based on the total inherent active power regulation coefficient of the system and the synchronous torque coefficient of the system. The instantaneous power of the synchronizing machine and the instantaneous power of the fan are determined based on the conservative instantaneous power of the sonication system. The distribution of the instantaneous power of the synchronizing machine and the instantaneous power of the wind turbine is proportional to the corresponding inherent active power regulation coefficient.

4. The active power regulation method considering instantaneous energy distribution efficiency according to claim 1, characterized in that, An active power regulation proportional coefficient is introduced into the system model to construct the instantaneous energy function during the oscillation of the synchronized system. Based on this instantaneous energy function, the distribution pattern of instantaneous energy among synchronized generating units is analyzed, including: The instantaneous energy function is constructed using the oscillation process of the system model as the object; An instantaneous energy distribution angle is introduced into the instantaneous energy function to characterize the distribution state of instantaneous energy among coherent units; An amplitude parameter is introduced into the instantaneous energy function to characterize the oscillation amplitude; The synchronous torque coefficient ratio is introduced into the instantaneous energy function to characterize the synchronous torque coupling relationship.

5. The active power regulation method considering instantaneous energy distribution efficiency according to claim 1, characterized in that, After a disturbance occurs in the synchronization system, the instantaneous energy distribution efficiency is determined based on the instantaneous energy of the synchronizer and the assumption that the instantaneous energy is concentrated in the synchronizer at the initial moment, including: After a disturbance occurs in the synchronization system, the instantaneous energy of the synchronizing machine is determined, and a new time scale is introduced to characterize the dynamic process after the disturbance. Under the assumption that the instantaneous energy is concentrated in the synchronizing machine at the initial moment, determine the relationship between the instantaneous energy of the synchronizing machine and time after the disturbance; The instantaneous energy allocation efficiency is determined based on the instantaneous energy of the synchronizer after the disturbance and the instantaneous energy of the synchronizer at the initial moment.

6. The active power regulation method considering instantaneous energy distribution efficiency according to claim 1, characterized in that, Given a target instantaneous energy distribution efficiency, an equation for solving the active power regulation ratio coefficient is established based on the total instantaneous energy conservation of the coherent system, and solvability conditions are determined. The active power regulation ratio coefficient is obtained by solving for the solvability conditions, including: Based on the conservation of total instantaneous energy of the homology system, a relational formula is established to determine the angle parameters in the instantaneous energy function; Substitute the angle parameter into the equation related to the instantaneous energy distribution efficiency of the target to construct an equation for solving the active power regulation ratio coefficient; Determine the solvable conditions that make the equation have a solution; When the solvable condition is met, the active power regulation ratio coefficient corresponding to the target instantaneous energy distribution efficiency is obtained by solving the problem.

7. The active power regulation method considering instantaneous energy distribution efficiency according to claim 1, characterized in that, Taking into account the instantaneous energy distribution efficiency and power support requirements, the design value of the active power regulation coefficient is calculated based on the correspondence between the instantaneous energy distribution efficiency and the active power regulation coefficient, including: Establish a correspondence between the instantaneous energy allocation efficiency and the active power regulation coefficient based on the instantaneous energy allocation efficiency; Based on the aforementioned correspondence and taking into account the power support requirements, the design value of the active power regulation coefficient is calculated.

8. The active power regulation method considering instantaneous energy distribution efficiency according to claim 1, characterized in that, The active power regulation coefficient design value is set in the active power controller of the wind turbine, so that when the synchronization system detects frequency or power disturbances, the wind turbine participates in grid regulation according to the active power regulation coefficient design value, including: The design value of the active power regulation coefficient is written into the active power controller of the wind turbine, and used as the active power regulation parameter of the active power controller; When the synchronization system detects frequency disturbances or power disturbances, the active power controller generates an active power adjustment command based on the active power adjustment parameters. The active power output of the wind turbine is adjusted according to the active power adjustment command to participate in grid regulation.

9. The active power regulation method considering instantaneous energy distribution efficiency according to claim 1, characterized in that, Based on the system parameters of the wind turbine and the synchronous machine, a system model for the synchronized operation of the wind turbine and the synchronous machine is established, including: Obtain the system parameters of the synchronizer, wherein the system parameters include at least the inherent active power regulation coefficient of the synchronizer; Obtain the system parameters of the wind turbine, wherein the system parameters include at least the inherent active power regulation coefficient of the wind turbine; The total inherent active power regulation coefficient of the system is determined based on the inherent active power regulation coefficient of the synchronous machine and the inherent active power regulation coefficient of the fan.

10. An active power regulation system taking into account instantaneous energy distribution efficiency, characterized in that, include: The system modeling unit is used to establish a system model of the wind turbine and the synchronous machine operating in sync based on the system parameters of the wind turbine and the synchronous machine. The system model corresponding to the wind turbine and synchronous machine operating in sync is a sync system. The parameter determination unit is used to determine the total inherent active power regulation coefficient and the synchronous torque coefficient of the system based on the system model, so as to determine the conservative instantaneous power of the synchronized system. The instantaneous energy analysis unit is used to introduce the active power regulation ratio coefficient into the system model, construct the instantaneous energy function when the synchronous system oscillates, and analyze the distribution law of instantaneous energy among synchronous units based on the instantaneous energy function so that the instantaneous power distribution between the wind turbine and the synchronous machine is proportional to its inherent active power regulation coefficient. The disturbance response calculation unit is used to determine the instantaneous energy distribution efficiency based on the instantaneous energy of the synchronizer and the assumption that the instantaneous energy is concentrated in the synchronizer at the initial moment after a disturbance occurs in the synchronizer system. The proportional coefficient solving unit is used to establish an equation for solving the active power regulation proportional coefficient based on the total instantaneous energy conservation of the coherent system, given a target instantaneous energy distribution efficiency, and determine the solvable conditions. When the solvable conditions are met, the active power regulation proportional coefficient is obtained. The regulation coefficient calculation unit is used to take into account the instantaneous energy distribution efficiency and power support requirements, and calculate the design value of the active power regulation coefficient based on the correspondence between the instantaneous energy distribution efficiency and the active power regulation coefficient. The control execution unit is used to set the design value of the active power regulation coefficient in the active power controller of the wind turbine, so that when the synchronization system detects frequency or power disturbances, the wind turbine participates in grid regulation according to the design value of the active power regulation coefficient.

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