CN118520652A

CN118520652A - Method and device for generating operation regulation strategy of water-wind-light hybrid power generation system

Info

Publication number: CN118520652A
Application number: CN202410563915.7A
Authority: CN
Inventors: 李彦浩; 方红; 许建文; 杨雪林; 吴现
Original assignee: Shanghai Investigation Design and Research Institute Co Ltd SIDRI
Current assignee: Shanghai Investigation Design and Research Institute Co Ltd SIDRI
Priority date: 2024-05-08
Filing date: 2024-05-08
Publication date: 2024-08-20

Abstract

The application relates to a method and a device for generating an operation regulation strategy of a water-wind-solar hybrid power generation system, wherein the method comprises the following steps: establishing a mathematical simulation model of the hybrid power generation system, and simulating system transient characteristics of the hybrid power generation system under the condition of target wind speed disturbance, target illumination intensity disturbance and target load disturbance respectively based on the mathematical simulation model; based on a mathematical simulation model, analyzing the influence of the capacity ratio of power grid parameters, hydropower, wind power and photoelectricity in the hybrid power generation system under the simultaneous action of all the disturbances on transient characteristics; based on transient characteristic analysis results and a mathematical simulation model, the regulating effect of a speed regulator and a converter of the target variable-speed pumped storage power station on the transient characteristic of the system in each target application scene is analyzed to generate a corresponding operation regulating strategy. Therefore, the problems of larger fluctuation of the power grid voltage and the like caused by the uncertainty of the power grid trend and large reactive power demand change amplitude in the traditional variable speed pumping and accumulating unit are solved.

Description

Method and device for generating operation regulation strategy of water-wind-light hybrid power generation system

Technical Field

The application relates to the technical field of regulation control of a variable speed pumping and accumulating unit on a novel power system, in particular to a method and a device for generating an operation regulation strategy of a water-wind-light hybrid power generation system.

Background

The variable-speed pumped storage technology has great application potential in supporting the power grid to maintain the dynamic balance of long-term electric power and electric quantity, on one hand, compared with electrochemical energy storage, the pumped storage technology has advantages in capacity, and can cope with long-term low-emission scenes of new energy sources; on the other hand, the variable-speed pumped storage technology provides a quick response capability for the pumped storage power station to cope with short-term severe fluctuation of the power grid.

Because new energy sources such as wind power, photovoltaic and the like have strong randomness, volatility and anti-peak shaving characteristics, the novel energy source has the challenges of maximum wind power, insufficient power grid peak shaving capability, difficult clean energy source absorption and the like when the load is low at night. A large number of synchronous generator sets exist in a traditional power system, so that the system has good voltage stability, the voltage stability of a power grid is reduced due to the continuous increase of the new energy duty ratio and the centralized delivery of renewable energy, the randomness and fluctuation of the new energy output also can cause the uncertainty of the power flow of the power grid, the reactive power demand change amplitude is large, and the voltage fluctuation of the power grid is large. The variable-speed pumped storage unit not only has excellent peak clipping and valley filling capacity, but also can realize reactive power rapid adjustment through alternating current excitation, and has important significance for maintaining the voltage stability of a power grid and improving the clean energy consumption capacity of the power grid.

However, the uncertainty of the power flow of the power grid and the large variation range of reactive power demand in the traditional variable speed pumping and accumulating unit lead to larger fluctuation of the power grid voltage, and the problem needs to be solved.

Disclosure of Invention

The application provides a method and a device for generating an operation regulation strategy of a water-wind-solar hybrid power generation system, which are used for solving the problems of larger fluctuation of power grid voltage and the like caused by large power grid flow uncertainty and reactive power demand change amplitude in a traditional variable speed pumping and accumulating unit.

An embodiment of a first aspect of the present application provides a method for generating an operation adjustment strategy of a hybrid wind-solar power generation system, including the steps of: establishing a mathematical simulation model of a target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system, and simulating system transient characteristics of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the conditions of target wind speed disturbance, target illumination intensity disturbance and target load disturbance respectively based on the mathematical simulation model; based on the mathematical simulation model, analyzing the influence of the capacity ratio of power grid parameters, hydropower, wind power and photoelectricity in the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system on the transient characteristic under the simultaneous actions of the target wind speed disturbance, the target illumination intensity disturbance and the target load disturbance, and generating a system transient characteristic analysis result; and determining multiple target application scenes of the mathematical simulation model, and analyzing the regulating effect of a speed regulator and a converter of the target variable-speed pumped storage power station on the transient characteristic of the system in each target application scene of the multiple target application scenes based on the transient characteristic analysis result and the mathematical simulation model so as to generate an operation regulating strategy of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system through the regulating effect.

Optionally, in one embodiment of the present application, the establishing a mathematical simulation model of the target variable speed pumped storage-wind power-photovoltaic hybrid power generation system includes: establishing a target water pump water turbine model and a target generator motor model, and constructing an alternating-current excitation double-fed induction type variable-speed pumped storage power station model based on the target water pump water turbine model, the target generator motor model, a preset double-fed induction motor vector control strategy, a generator working condition power priority control strategy of a speed change unit and a pipeline equation solving strategy; constructing a wind power generation system model through a preset wind turbine aerodynamic system model, a generator motion equation and a variable pitch system model; building a solar photovoltaic array through a plurality of solar photovoltaic panels, and building a photovoltaic power generation system model according to the solar photovoltaic array; constructing a power grid model based on the capacity ratio of the hydropower, the wind power and the photoelectricity in a target power grid and the power grid parameters; and constructing the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system through the alternating-current excitation doubly-fed induction variable-speed pumped storage power station model, the wind power generation system model, the photovoltaic power generation system model and the power grid model, and establishing a mathematical simulation model of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system according to a preset modeling platform.

Optionally, in an embodiment of the present application, the simulating, based on the mathematical simulation model, system transient characteristics of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under a target wind speed disturbance, a target illumination intensity disturbance and a target load disturbance respectively includes: simulating the transient characteristics of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the condition that the illumination intensity and the charge of a negative electricity consumption end in the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system are kept unchanged; simulating the transient characteristics of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the condition that the wind speed and the charge of the electricity consumption negative terminal in the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system are kept unchanged; and under the condition that the wind speed and the illumination intensity in the target variable-speed pumped-storage-wind power-photovoltaic hybrid power generation system are kept unchanged, simulating the transient characteristics of the target variable-speed pumped-storage-wind power-photovoltaic hybrid power generation system under the disturbance of the target load.

Optionally, in one embodiment of the present application, the determining multiple target application scenarios of the mathematical simulation model, and analyzing, based on the transient characteristic analysis result and the mathematical simulation model, an effect of adjusting the transient characteristic of the system by the speed regulator and the current transformer of the target variable speed pumped storage power station in each target application scenario of the multiple target application scenarios includes: acquiring a power grid frequency oscillation period and a frequency amplitude corresponding to the power grid parameters under each target application scene based on a preset power priority control strategy of a power generation working condition of the speed changer, PID parameters of the speed changer and PI parameters of the converter, and acquiring a target rotating speed time and a maximum rotating speed rising rate of the alternating current excitation doubly-fed induction type speed change pumping and accumulating unit corresponding to the alternating current excitation doubly-fed induction type speed change pumping and accumulating power station model; determining the adjusting effect of the speed regulator and the converter on the transient characteristics of the power grid frequency system of each target application scene according to the power grid frequency oscillation period and the frequency amplitude; and obtaining the effect of the speed regulator and the converter on regulating the transient characteristics of the speed system of the variable speed pumping and accumulating unit in each target application scene through the target speed time and the maximum speed rising rate.

Optionally, in one embodiment of the present application, the mathematical expression of the grid model is:

Wherein B ₁ is the capacity ratio of the water and electricity in the target power grid; b ₂ is the capacity ratio of the wind power in the target power grid; b ₃ is the capacity ratio of the photovoltaic in the target power grid; t _s is the inertia time constant of the power grid equivalent unit; d _s is a self-adjusting coefficient of the equivalent load of the power grid; t _g is the inertial time constant of the equivalent servomotor of the power grid; r _g is the equivalent permanent state slip coefficient of the power grid.

An embodiment of a second aspect of the present application provides an operation adjustment strategy generating device of a water-wind-solar hybrid power generation system, including: the modeling module is used for establishing a mathematical simulation model of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system, and simulating system transient characteristics of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the conditions of target wind speed disturbance, target illumination intensity disturbance and target load disturbance respectively based on the mathematical simulation model; the analysis module is used for analyzing the influence of the capacity ratio of power grid parameters, hydropower, wind power and photoelectricity in the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system on the transient characteristic under the simultaneous actions of the target wind speed disturbance, the target illumination intensity disturbance and the target load disturbance based on the mathematical simulation model, and generating a system transient characteristic analysis result; and the adjusting module is used for determining various target application scenes of the mathematical simulation model, analyzing the adjusting effect of a speed regulator and a converter of the target variable-speed pumped storage power station on the transient characteristic of the system under each target application scene in the various target application scenes based on the transient characteristic analysis result and the mathematical simulation model, and generating an operation adjusting strategy of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system through the adjusting effect.

Optionally, in one embodiment of the present application, the modeling module includes: the first construction unit is used for establishing a target water pump water turbine model and a target generator motor model, and constructing an alternating-current excitation double-fed induction type variable-speed pumped storage power station model based on the target water pump water turbine model, the target generator motor model, a preset double-fed induction motor vector control strategy, a variable-speed unit generator working condition power priority control strategy and a pipeline equation solving strategy; the second construction unit is used for constructing a wind power generation system model through a preset wind turbine aerodynamic system model, a generator motion equation and a pitch system model; the third construction unit is used for building a solar photovoltaic array through a plurality of solar photovoltaic panels and constructing a photovoltaic power generation system model according to the solar photovoltaic array; a fourth construction unit, configured to construct a power grid model based on the capacity ratio of the hydropower, the wind power, and the photovoltaic in a target power grid and the power grid parameter; and the fifth construction unit is used for constructing the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system through the alternating-current excitation doubly-fed induction variable-speed pumped storage power station model, the wind power generation system model, the photovoltaic power generation system model and the power grid model, and establishing a mathematical simulation model of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system according to a preset modeling platform.

Optionally, in one embodiment of the present application, the modeling module further includes: the first simulation unit is used for simulating the transient characteristics of the system of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the condition that the illumination intensity and the charge of the charge negative terminal in the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system are kept unchanged; the second simulation unit is used for simulating the transient characteristics of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the condition that the wind speed and the electricity consumption negative terminal load in the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system are kept unchanged; and the third simulation unit is used for simulating the transient characteristics of the target variable-speed pumped-storage-wind power-photovoltaic hybrid power generation system under the condition that the wind speed and the illumination intensity in the target variable-speed pumped-storage-wind power-photovoltaic hybrid power generation system are kept unchanged.

Optionally, in one embodiment of the present application, the adjusting module includes: the acquisition unit is used for acquiring a power grid frequency oscillation period and a frequency amplitude corresponding to the power grid parameters under each target application scene and a target rotating speed time and a maximum rotating speed rising rate of the alternating-current excitation double-fed induction type variable-speed pumping and accumulating unit corresponding to the alternating-current excitation double-fed induction type variable-speed pumping and accumulating power station model based on a preset power priority control strategy of the generating working condition of the variable-speed unit, PID parameters of the speed regulator and PI parameters of the converter; the frequency adjusting unit is used for determining the adjusting effect of the speed regulator and the converter on the transient characteristics of the power grid frequency system of each target application scene according to the power grid frequency oscillation period and the frequency amplitude; and the rotating speed adjusting unit is used for obtaining the effect of the speed regulator and the converter on adjusting the transient characteristics of the rotating speed system of the variable speed pumping and accumulating unit of each target application scene through the target rotating speed time and the maximum rotating speed rising rate.

An embodiment of a third aspect of the present application provides an electronic device, including: the system comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the program to realize the running regulation strategy generation method of the water-wind-solar hybrid power generation system.

A fourth aspect embodiment of the present application provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements the operation regulation strategy generation method of the water-wind-solar hybrid power generation system as above.

An embodiment of a fifth aspect of the present invention provides a computer program product comprising a computer program which, when executed, implements the method for generating an operation regulation strategy of a hybrid wind-solar power generation system as described above.

Thus, embodiments of the present application have the following beneficial effects:

According to the embodiment of the application, the mathematical simulation model of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system is established, and the system transient characteristics of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the conditions of target wind speed disturbance, target illumination intensity disturbance and target load disturbance are simulated based on the mathematical simulation model; based on a mathematical simulation model, analyzing the influence of the capacity ratio of power grid parameters, hydropower, wind power and photoelectricity on transient characteristics in a target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the simultaneous actions of target wind speed disturbance, target illumination intensity disturbance and target load disturbance, and generating a system transient characteristic analysis result; and based on transient characteristic analysis results and the mathematical simulation model, analyzing the regulating effect of a speed regulator and a converter of the target variable-speed pumped storage power station on the transient characteristic of the system in each of the multiple target application scenes so as to generate an operation regulating strategy of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system through the regulating effect, thereby effectively improving the regulating performance of the power grid and providing theoretical and technical support for the stable operation of the power grid in the novel power system. Therefore, the problems of larger fluctuation of the power grid voltage and the like caused by the uncertainty of the power grid trend and large reactive power demand change amplitude in the traditional variable speed pumping and accumulating unit are solved.

Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the application.

Drawings

The foregoing and/or additional aspects and advantages of the application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a flow chart of a method for generating an operation regulation strategy of a water-wind-solar hybrid power generation system according to an embodiment of the application;

FIG. 2 is a schematic diagram of a variable speed pumped storage-wind power-photovoltaic hybrid power generation system according to an embodiment of the present application;

FIG. 3 is a schematic diagram of execution logic of a method for generating an operation regulation strategy of a hybrid wind-solar power generation system according to an embodiment of the present application;

FIG. 4 is a schematic diagram of transient characteristics of a variable speed pumped storage-wind power-photovoltaic hybrid power generation system under wind speed disturbance according to an embodiment of the present application;

FIG. 4 (a) is a schematic diagram illustrating a power grid frequency change process under a step wind speed disturbance according to an embodiment of the present application;

FIG. 4 (b) is a schematic diagram illustrating a power grid frequency variation under random wind speed disturbance according to an embodiment of the present application;

FIG. 5 is a schematic diagram of transient characteristics of a variable speed pumped storage-wind power-photovoltaic hybrid power generation system under illumination intensity disturbance according to an embodiment of the present application;

Fig. 5 (a) is a schematic diagram illustrating a power grid frequency change process under a step illumination intensity according to an embodiment of the present application;

fig. 5 (b) is a schematic diagram showing a power grid frequency variation process under a random illumination intensity according to an embodiment of the present application;

FIG. 6 is a schematic diagram of transient characteristics of a variable speed pumped storage-wind power-photovoltaic hybrid power generation system under load disturbance according to an embodiment of the present application;

fig. 6 (a) is a schematic diagram of a power grid frequency variation during load shedding according to an embodiment of the present application;

fig. 6 (b) is a schematic diagram of a power grid frequency change process during load increase according to an embodiment of the present application;

FIG. 7 (a) illustrates the effect of an inertial time constant of a grid equivalent unit on grid frequency according to one embodiment of the present application;

fig. 7 (b) shows the influence of an inertia time constant of a power grid equivalent unit on the pumping and accumulating rotation speed according to an embodiment of the present application;

Fig. 7 (c) shows the influence of an inertia time constant of a power grid equivalent unit on the rotation speed of a fan according to an embodiment of the present application;

fig. 8 (a) shows the effect of a speed regulator parameter on the pumping and accumulating rotation speed in four application scenarios of water network, water network wind, water network light and water network wind and light according to an embodiment of the present application;

Fig. 8 (b) shows the effect of a speed regulator parameter on the grid frequency in four application scenarios of water grid, water grid wind, water grid light and water grid wind and light according to an embodiment of the present application;

FIG. 9 is an exemplary diagram of an operation regulation strategy generation device of a hybrid wind-solar power generation system according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Wherein, an operation regulation strategy generating device of the 10-water wind-light hybrid power generation system; 100-modeling module, 200-analysis module, 300-adjustment module; 1001-memory, 1002-processor, 1003-communication interface.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application.

The following describes an operation regulation strategy generation method and device of a water-wind-light hybrid power generation system according to an embodiment of the present application with reference to the accompanying drawings. Aiming at the problems in the background art, the application provides a method for generating an operation regulation strategy of a water-wind-solar hybrid power generation system, wherein in the method, the system transient characteristics of the target variable-speed pumped-storage-wind-power-photovoltaic hybrid power generation system under the conditions of target wind speed disturbance, target illumination intensity disturbance and target load disturbance are simulated based on a mathematical simulation model by establishing the mathematical simulation model of the target variable-speed pumped-storage-wind-power-photovoltaic hybrid power generation system; based on a mathematical simulation model, analyzing the influence of the capacity ratio of power grid parameters, hydropower, wind power and photoelectricity on transient characteristics in a target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the simultaneous actions of target wind speed disturbance, target illumination intensity disturbance and target load disturbance, and generating a system transient characteristic analysis result; and based on transient characteristic analysis results and the mathematical simulation model, analyzing the regulating effect of a speed regulator and a converter of the target variable-speed pumped storage power station on the transient characteristic of the system in each of the multiple target application scenes so as to generate an operation regulating strategy of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system through the regulating effect, thereby effectively improving the regulating performance of the power grid and providing theoretical and technical support for the stable operation of the power grid in the novel power system. Therefore, the problems of larger fluctuation of the power grid voltage and the like caused by the uncertainty of the power grid trend and large reactive power demand change amplitude in the traditional variable speed pumping and accumulating unit are solved.

Specifically, fig. 1 is a flowchart of a method for generating an operation adjustment strategy of a hybrid wind-solar power generation system according to an embodiment of the present application.

As shown in fig. 1, the operation regulation strategy generation method of the water-wind-solar hybrid power generation system comprises the following steps:

In step S101, a mathematical simulation model of the target variable-speed pumped-storage-wind power-photovoltaic hybrid power generation system is established, and based on the mathematical simulation model, system transient characteristics of the target variable-speed pumped-storage-wind power-photovoltaic hybrid power generation system under the condition of target wind speed disturbance, target illumination intensity disturbance and target load disturbance are simulated.

The embodiment of the application can firstly establish a mathematical simulation model of the variable-speed pumped storage-wind power-photovoltaic hybrid power generation system (i.e. the hybrid power generation system) on a Matlab/Simulink platform based on the refined models of all subsystems in an alternating-current excitation doubly-fed induction variable-speed pumped storage power station, a wind power generation system, a photovoltaic power generation system and a power grid, and simulate the transient characteristics of the variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the respective actions of wind speed disturbance, illumination intensity disturbance and load disturbance according to the mathematical simulation model, thereby improving the flat and reliable data support and basis for the subsequent analysis of the transient characteristics of the system.

Optionally, in one embodiment of the present application, establishing a mathematical simulation model of the target variable speed pumped storage-wind power-photovoltaic hybrid power generation system includes: establishing a target water pump water turbine model and a target generator motor model, and constructing an alternating-current excitation doubly-fed induction type variable-speed pumped storage power station model based on the target water pump water turbine model, the target generator motor model, a preset doubly-fed induction motor vector control strategy, a generating condition power priority control strategy of a speed change unit and a pipeline equation solving strategy; constructing a wind power generation system model through a preset wind turbine aerodynamic system model, a generator motion equation and a variable pitch system model; building a solar photovoltaic array through a plurality of solar photovoltaic panels, and building a photovoltaic power generation system model according to the solar photovoltaic array; constructing a power grid model based on the capacity ratio of the hydropower, wind power and the photoelectricity in the target power grid and the power grid parameters; and constructing a target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system by an alternating-current excitation doubly-fed induction variable-speed pumped storage power station model, a wind power generation system model, a photovoltaic power generation system model and a power grid model, and establishing a mathematical simulation model of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system according to a preset modeling platform.

It should be noted that, the process of constructing the mathematical simulation model of the variable-speed pumped storage-wind power-photovoltaic hybrid power generation system according to the refined model of each subsystem in the alternating-current excitation doubly-fed induction variable-speed pumped storage power station, the wind power generation system, the photovoltaic power generation system and the power grid in the embodiment of the application is as follows:

(1) Ac excitation double-fed induction type speed-changing pumped storage power station model

1) Pipeline equation and solving method

In the embodiment of the application, the basic equation of the unsteady flow of the pressurized pipeline comprises a momentum equation and a continuous equation, and the basic equation of the unsteady flow of the pressurized pipeline can be solved by adopting a characteristic line method taking x-t as a coordinate field, and then the pressurized pipeline can connect structures such as a pressure regulating chamber, a valve, a unit system, an upstream reservoir, a downstream reservoir and the like, as shown in fig. 2, so as to form a pumped storage system;

2) Water pump turbine model

Aiming at the strong nonlinearity, inverse S and hump characteristics of the water pump turbine, the embodiment of the application can process the full characteristic curve of the water pump turbine by adopting improved Suter transformation so as to eliminate the multi-value problem in interpolation calculation.

3) Generator motor model

It should be appreciated by those skilled in the art that the generator motor of the variable speed unit adopts a doubly-fed induction motor, the water pump turbine is connected with the doubly-fed induction motor through a rotating shaft, so as to realize the transmission of mechanical power of the unit, wherein the model of the doubly-fed induction motor can be represented by the following equation:

Voltage equation and flux linkage equation:

In the second-order generator motion equation, because the power angle in the equation has little influence on the stability and dynamic characteristics of the system, the embodiment of the application does not consider the influence of the power angle change, and the power angle is assumed to be constant. Order the A rotational speed equation and a motion equation can be obtained:

The power equation:

Wherein u _sd is stator d-axis voltage (kV); u _sq is stator q-axis voltage (kV); u _rd is the rotor d-axis voltage (kV); u _sq is the rotor q-axis voltage (kV); i _sd is the stator d-axis current (kA); i _sq is stator q-axis current (kA); i _rd is rotor d-axis current (kA); i _rq is rotor q-axis current (kA); Phi _sd is stator d-axis flux linkage (Wb); phi _sq is stator q-axis flux linkage (Wb); phi _rd is the rotor d-axis flux linkage (Wb); phi _rq is rotor q-axis flux linkage (Wb); R _s is stator resistance (mΩ); r _r is the rotor resistance (mΩ); l _s is stator inductance (mH); l _m is the mutual inductance (mH) between the stator and the rotor; L _r is rotor inductance (mH); omega _s is stator rotating magnetic field electrical angular velocity (rad/s); omega _r is the rotor rotating magnetic field electrical angular velocity (rad/s); omega _m is the rotor mechanical speed (rad/s); J is the rotational inertia of the water pump turbine (kg.m ²);p_n is the magnetic pole pair of DFIM; T _et is the electromagnetic torque (N.m) of DFIM; T _t is the mechanical torque (N.m) of pumping and storage, and D _at is the equivalent damping coefficient between pumping and storage and a power grid; x _s is the grid frequency relative deviation value; p _s is stator active power (MW); p _r is rotor active power (MW); q _s is stator reactive power (MW); Q _r is rotor reactive power (MW);

4) Vector control of doubly-fed induction machine

Assuming that the stator voltage amplitude and frequency of the doubly-fed induction motor are both constant values, the embodiment of the application can control the active power and the reactive power of the doubly-fed induction motor by adopting a stator voltage vector control strategy. Meanwhile, as the resistance of the stator is very small, the voltage at two ends of the resistance is negligible relative to the total voltage, so that in the steady state, the embodiment of the application can obtain the relation between the stator flux linkage and the voltage according to the voltage equation of the machine set, therefore, u _sd＝U_s,u_sq =0,Thus, the following formula can be obtained:

furthermore, the embodiment of the present application may substitute the stator current into the power equation, and may obtain:

As can be seen from the above, decoupling is achieved by active and reactive power. Wherein, the active power P _s can be controlled by the rotor side current d-axis component i _rd, and the reactive power Q _s can be controlled by the rotor side current Q-axis component i _rq, U _s is the stator voltage phase amplitude (kV);

5) Power priority control for generating working condition of speed changing unit

In the embodiment of the application, the alternating-current excitation doubly-fed induction type variable-speed pumping and accumulating unit can perform motor excitation control through the current transformer, so that independent decoupling control of unit power and rotating speed is realized. Wherein the components are divided into two control modes of power priority and rotation speed priority, a power priority control strategy can be generally adopted under the power generation working condition; the unit power is regulated through the converter in the power priority control mode, and the unit rotating speed can be regulated through the speed regulator control guide vane.

(2) Wind power generation system model

The wind power generation system mainly comprises a pneumatic module, a mechanical shafting transmission module, a pitch angle control module and a permanent magnet synchronous generator. The system model of each part is as follows:

1) Wind turbine aerodynamic system model

The Betz theory proposes a complete theory of capturing wind energy by a wind wheel of a wind power generation system, wherein an equation of a mechanical moment M _w of a fan is as follows:

Wherein C _P is the wind energy utilization coefficient; v _w is wind speed (m/s); omega _w is the fan speed (rad/s); p _w is fan output (W); m _w is the mechanical moment (N.m) of the fan; lambda is the tip speed ratio of the fan; beta _w is pitch angle (°; ρ is the air density (kg/m ³); r is the radius (m) of the fan blade;

2) Equation of motion of generator

The direct-drive permanent magnet synchronous fan transmission system adopts a simple block model, and transmission shafts between wind wheels and generators are rigid and have no gearbox, so thatThe equation of motion is obtained as follows:

Wherein J _w is equivalent rotational inertia of the wind turbine (kg.m ²);n_p is the magnetic pole pair number of the PMSG; T _w is the mechanical torque (N.m) of the fan; T _ew is the electromagnetic torque (N.m) of the PMSG; and D _aw is the equivalent damping coefficient between the fan and the power grid;

3) Pitch system model

In an embodiment of the application, the main system of the pitch system gives a pitch angle reference value according to the rotational speed or the power deviation, and the pitch servo controls the blades to rotate to the pitch angle reference value, and the pitch angle control equation is as follows:

Wherein τ is a pitch angle actuator inertia time constant(s); beta _w ^ref is the pitch angle reference value (°).

(3) Photovoltaic power generation system model

The photovoltaic cell model can be generally similar to a diode equivalent physical model, the solar photovoltaic array is formed by connecting a plurality of solar photovoltaic cell panels in series and parallel, and the output of the solar photovoltaic array model is as follows:

P_pv＝I_pvV_pv

Wherein I _pv is the output current (A); v _pv is the output voltage (V); p _pv is the photovoltaic array output (W).

(4) Power grid model

Furthermore, embodiments of the present application may represent the grid as an equivalent generator set to build a corresponding grid model.

Therefore, the embodiment of the application can construct the variable-speed pumped storage-wind power-photovoltaic hybrid power generation system according to the alternating-current excitation doubly-fed induction variable-speed pumped storage power station, the wind power generation system, the photovoltaic power generation system and the refined model of each subsystem in the power grid, and establishes the mathematical simulation model of the variable-speed pumped storage-wind power-photovoltaic hybrid power generation system by utilizing the Matlab/Simulink platform, thereby better reflecting the transient characteristics of the hybrid power generation system when the hybrid power generation system is subjected to different disturbance and effectively ensuring the generation of the operation regulation strategy of the follow-up variable-speed pumped storage-wind power-photovoltaic hybrid power generation system.

Wherein B ₁ is the capacity ratio of the water and electricity in the target power grid; b ₂ is the capacity ratio of wind power in a target power grid; b ₃ is the capacity duty cycle of the photovoltaic in the target grid; t _s is the inertia time constant of the power grid equivalent unit; d _s is a self-adjusting coefficient of the equivalent load of the power grid; t _g is the inertial time constant of the equivalent servomotor of the power grid; r _g is the equivalent permanent state slip coefficient of the power grid.

It should be noted that, in the embodiment of the present application, the power grid may be represented as an equivalent generator set, and the mathematical expression of the mathematical model (i.e., the power grid model) of the equivalent generator set is:

Wherein, B ₁ is the capacity ratio of the water and electricity in the target power grid; b ₂ is the capacity ratio of wind power in a target power grid; b ₃ is the capacity duty cycle of the photovoltaic in the target grid; t _s is the inertia time constant of the power grid equivalent unit; d _s is a self-adjusting coefficient of the equivalent load of the power grid; t _g is the inertial time constant of the equivalent servomotor of the power grid; r _g is the equivalent permanent state slip coefficient of the power grid.

Therefore, the embodiment of the application ensures the quality and reliability of the constructed variable-speed pumped storage-wind power-photovoltaic hybrid power generation system and the mathematical simulation model thereof by constructing a proper power grid model.

Optionally, in one embodiment of the present application, based on a mathematical simulation model, simulating system transient characteristics of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the target wind speed disturbance, the target illumination intensity disturbance and the target load disturbance respectively, including: under the condition that the illumination intensity and the charge of a negative end of electricity in the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system are kept unchanged, simulating the transient characteristics of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the disturbance of a target wind speed; under the condition that the wind speed and the load of a negative electricity consumption end in a target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system are kept unchanged, simulating the transient characteristics of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the disturbance of the target illumination intensity; under the condition that the wind speed and the illumination intensity in the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system are kept unchanged, the transient characteristics of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the disturbance of a target load are simulated.

Furthermore, the embodiment of the application can simulate the transient characteristics of the variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under wind speed disturbance, illumination intensity disturbance and load disturbance according to a mathematical simulation model.

When the transient characteristics of the system of the hybrid power generation system are respectively acted by the simulated wind speed disturbance, the illumination intensity disturbance and the load disturbance, the variable-speed pumped storage power station, the wind power generation system and the photovoltaic power generation system are all in a power generation running state. When simulating the transient characteristics of the hybrid power generation system under wind speed disturbance, the illumination intensity and the charge of the power consumption negative terminal are required to be kept unchanged; when the transient characteristics of the hybrid power generation system under the disturbance of illumination intensity are simulated, the wind speed and the charge of the electricity consumption negative terminal are required to be kept unchanged; similarly, when simulating the transient characteristics of the hybrid power generation system under load disturbance, the wind speed and the illumination intensity need to be kept unchanged.

It should be noted that in all three cases, the embodiment of the application only enables the variable-speed pumped-storage power station to regulate the hybrid power generation system.

Therefore, the embodiment of the application provides important data basis for generating an operation regulation strategy of the hybrid power generation system by simulating the transient characteristics of the hybrid power generation system under the respective actions of wind speed disturbance, illumination intensity disturbance and load disturbance.

In step S102, based on the mathematical simulation model, the influence of the capacity ratio of the grid parameters, the hydropower, the wind power and the photoelectricity on the transient characteristic in the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the simultaneous actions of the target wind speed disturbance, the target illumination intensity disturbance and the target load disturbance is analyzed, and a system transient characteristic analysis result is generated.

In step S103, a plurality of target application scenarios of the mathematical simulation model are determined, and based on the transient characteristic analysis result and the mathematical simulation model, the adjustment effect of the speed regulator and the converter of the target variable speed pumped storage power station on the transient characteristic of the system in each of the plurality of target application scenarios is analyzed, so as to generate the operation adjustment strategy of the target variable speed pumped storage-wind power-photovoltaic hybrid power generation system through the adjustment effect.

Further, the embodiment of the application can also analyze the influence of the power grid parameters and the capacity ratio of hydropower, wind power and photoelectricity in the hybrid power generation system on the transient characteristic of the system under the simultaneous actions of wind speed disturbance, illumination intensity disturbance and load disturbance based on the mathematical simulation model of the hybrid power generation system, as shown in fig. 3; according to the embodiment of the application, the regulating effect of the speed regulator and the converter of the variable-speed pumped storage power station on the transient characteristic of the system in the application scenes of water network, water network wind, water network light, water network wind and light and the like can be researched according to the mathematical simulation model of the hybrid power generation system, so that a reliable operation regulating strategy of the hybrid power generation system can be obtained according to the regulating effect.

Optionally, in an embodiment of the present application, determining multiple target application scenarios of the mathematical simulation model, and analyzing an effect of adjusting the transient characteristics of the system by the speed regulator and the converter of the target variable speed pumped storage power station in each of the multiple target application scenarios based on the transient characteristic analysis result and the mathematical simulation model, including: acquiring a power grid frequency oscillation period and frequency amplitude corresponding to power grid parameters under each target application scene based on a preset power priority control strategy of a power generation working condition of the speed changer, PID parameters of a speed regulator and PI parameters of a converter, and acquiring a target rotating speed time and a maximum rotating speed rising rate of an alternating current excitation double-fed induction type speed change pumping and accumulating unit corresponding to an alternating current excitation double-fed induction type speed change pumping and accumulating power station model; determining the adjusting effect of the speed regulator and the converter on the transient characteristics of the power grid frequency system of each target application scene according to the power grid frequency oscillation period and the frequency amplitude; and obtaining the effect of the speed regulator and the converter on regulating the transient characteristics of the speed system of the variable speed pumping and accumulating unit in each target application scene through the target speed time and the maximum speed rising rate.

In the actual implementation process, when the influence of the power grid parameters and the capacity ratio of water power, wind power and photoelectricity in the hybrid power generation system on the transient characteristics of the system is analyzed, the embodiment of the application can select the power grid frequency oscillation period T and the frequency amplitude Deltaf to represent the regulation quality (namely the regulation effect) of the power grid frequency, the time T _p required for the rotating speed to enter 0.4% and the maximum rotating speed rising rate sigma to represent the regulation quality of the pumping and accumulating fan.

When the speed regulator and the converter of the variable speed pumped storage power station are used for researching the regulating effect of the speed regulator and the converter on the transient characteristics of the system in the application scenes (namely, the target application scenes) such as water networks, water network wind, water network light and water network wind and light, the variable speed pumped storage power station can adopt a power priority control strategy to analyze and research the influence of the PID parameters of the speed regulator and the PI parameters of the converter on the regulating quality of the speed variable pumped storage unit and the power grid frequency in the various application scenes, so that a final regulating control method of the variable speed pumped storage power station on the hybrid power generation system is obtained.

The following describes the execution logic of the operation adjustment strategy generation method of the hybrid wind-solar power generation system according to the present application in detail by means of a specific embodiment and with reference to the accompanying drawings.

In a specific embodiment of the application, the rated frequency of the power grid can be set to be 50Hz, the fluctuation of the power grid frequency is limited to +/-0.2 Hz, and the total capacity of the power grid is 1000MW; the installed capacity of the alternating-current excitation doubly-fed induction type variable-speed pumping and accumulating unit is 306MW; the total installed capacity of the wind power plant is 180MW; the photovoltaic power generation field is also formed by connecting a plurality of photovoltaic arrays in series and parallel, and the capacity of the total assembly machine is 180MW; the remaining capacity 334MW was assumed to maintain constant output during the simulation, and the values of the parameters of each unit in the hybrid power system are shown in Table 1.

TABLE 1

Furthermore, in the embodiment of the application, the parameter values in the table 1 are substituted into the hybrid power generation system to be solved, so that the transient characteristics of the hybrid power generation system under the respective actions of wind speed disturbance, illumination intensity disturbance and load disturbance can be obtained.

Fig. 4 is a schematic diagram of transient characteristics of a variable speed pumped storage-wind power-photovoltaic hybrid power generation system under wind speed disturbance, wherein,

Fig. 4 (a) and fig. 4 (b) show the course of the grid frequency under step wind speed and random wind speed disturbances, respectively;

FIG. 5 is a schematic diagram of transient characteristics of a variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under illumination intensity disturbance, wherein (a) in FIG. 5 and (b) in FIG. 5 respectively represent the change process of grid frequency under step illumination intensity and random illumination intensity; fig. 6 is a transient characteristic of the variable-speed pumped-storage-wind power-photovoltaic hybrid power generation system under load disturbance, wherein (a) in fig. 6 and (b) in fig. 6 respectively show a change process of the power grid frequency during load reduction and load increase.

Further, based on a mathematical simulation model of the variable-speed pumped storage-wind power-photovoltaic hybrid power generation system, when the influence of the power grid parameters and the capacity ratio of water power, wind power and photoelectricity in the system on the transient characteristics of the system under the simultaneous actions of wind speed disturbance, illumination intensity disturbance and load disturbance is analyzed, the power grid parameters comprise: t _s、D_s、T_g、R_g、B₁、B₂ and B ₃, etc., wherein B ₁、B₂ and B ₃ represent the duty cycle of the installed hydroelectric, wind power, photovoltaic capacity in the grid, respectively.

In the specific embodiment of the application, the power grid frequency oscillation period T and the frequency amplitude Deltaf are selected to represent the regulation quality of the power grid frequency, the time T _p required by the rotation speed to enter 0.4% and the maximum rotation speed rising rate sigma are selected to represent the regulation quality of the pumping and accumulating and the fan, and the influence of the inertia time constant T _s of the power grid equivalent unit on the power grid frequency is reflected in (a) in fig. 7; fig. 7 (b) reflects the influence of the inertia time constant T _s of the power grid equivalent unit on the pumping speed; fig. 7 (c) reflects the influence of the inertia time constant T _s of the power grid equivalent unit on the fan speed; the analysis method of the other power grid parameters D _s、T_g、R_g and the capacity proportioning parameters B ₁、B₂、B₃ is the same as the inertia time constant T _s of the power grid equivalent unit.

In addition, when the speed regulator and the converter of the variable-speed pumped storage power station have the effect of regulating the transient characteristics of the system in various application scenes such as water network, water network wind, water network light, water network wind and the like, the variable-speed pumped storage power station can adopt a power priority control strategy so as to study the influence of PID parameters of the speed regulator and PI parameters of the converter on the speed and power grid frequency regulating quality of the variable-speed pumped storage unit in each application scene.

Likewise, in the specific embodiment of the application, the frequency oscillation period T and the frequency amplitude Δf of the power grid can be selected to reflect the regulation quality of the power grid, the time T _pm required for the rotation speed to enter 0.4% and the maximum rotation speed rising rate sigma _m are selected to reflect the regulation quality of the variable speed pumping and accumulating unit, and the (a) in fig. 8 reflects the influence effect of the speed regulator parameter K _i on the pumping and accumulating rotation speed in four application scenes of water network, water network wind, water network light and water network wind and light; fig. 8 (b) reflects the effect of the speed regulator parameter K _i on the grid frequency in four application scenarios of water grid, water grid wind, water grid light, water grid wind and light; the analysis methods of the other governor parameters K _p、K_d and the converter parameters K _p1、K_i1、K_p2、K_i2 are the same as the governor parameters K _i.

According to the operation regulation strategy generation method of the water-wind-light hybrid power generation system, provided by the embodiment of the application, the mathematical simulation model of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system is established, and the system transient characteristics of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the conditions of target wind speed disturbance, target illumination intensity disturbance and target load disturbance are simulated based on the mathematical simulation model; based on a mathematical simulation model, analyzing the influence of the capacity ratio of power grid parameters, hydropower, wind power and photoelectricity on transient characteristics in a target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the simultaneous actions of target wind speed disturbance, target illumination intensity disturbance and target load disturbance, and generating a system transient characteristic analysis result; and based on transient characteristic analysis results and the mathematical simulation model, analyzing the regulating effect of a speed regulator and a converter of the target variable-speed pumped storage power station on the transient characteristic of the system in each of the multiple target application scenes so as to generate an operation regulating strategy of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system through the regulating effect, thereby effectively improving the regulating performance of the power grid and providing theoretical and technical support for the stable operation of the power grid in the novel power system.

Next, an operation regulation strategy generation device of a water-wind-solar hybrid power generation system according to an embodiment of the present application will be described with reference to the accompanying drawings.

Fig. 9 is a block schematic diagram of an operation regulation strategy generation device of the water-wind-solar hybrid power generation system according to the embodiment of the application.

As shown in fig. 9, the operation regulation strategy generation device 10 of the water-wind-solar hybrid power generation system includes: modeling module 100, analysis module 200, and adjustment module 300.

The modeling module 100 is configured to establish a mathematical simulation model of the target variable-speed pumped-storage-wind power-photovoltaic hybrid power generation system, and simulate system transient characteristics of the target variable-speed pumped-storage-wind power-photovoltaic hybrid power generation system under the condition of target wind speed disturbance, target illumination intensity disturbance and target load disturbance respectively based on the mathematical simulation model.

The analysis module 200 is used for analyzing the influence of the capacity ratio of the power grid parameters, the hydropower, the wind power and the photoelectricity on the transient characteristic in the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the simultaneous actions of the target wind speed disturbance, the target illumination intensity disturbance and the target load disturbance based on the mathematical simulation model, and generating a system transient characteristic analysis result.

The adjusting module 300 is configured to determine multiple target application scenarios of the mathematical simulation model, and analyze an adjusting effect of a speed regulator and a converter of the target variable speed pumped storage power station on the transient characteristics of the system in each of the multiple target application scenarios based on the transient characteristic analysis result and the mathematical simulation model, so as to generate an operation adjusting strategy of the target variable speed pumped storage-wind power-photovoltaic hybrid power generation system through the adjusting effect.

Alternatively, in one embodiment of the application, the modeling module 100 includes: a first building unit, a second building unit, a third building unit, a fourth building unit and a fifth building unit.

The first construction unit is used for establishing a target water pump water turbine model and a target generator motor model, and constructing an alternating-current excitation double-fed induction type variable-speed pumped storage power station model based on the target water pump water turbine model, the target generator motor model, a preset double-fed induction motor vector control strategy, a variable-speed unit power generation working condition power priority control strategy and a pipeline equation solving strategy.

The second construction unit is used for constructing a wind power generation system model through a preset wind turbine aerodynamic system model, a generator motion equation and a pitch system model.

The third construction unit is used for building a solar photovoltaic array through a plurality of solar photovoltaic panels and constructing a photovoltaic power generation system model according to the solar photovoltaic array.

And the fourth construction unit is used for constructing a power grid model based on the capacity ratio of the hydropower, wind power and the photoelectricity in the target power grid and the power grid parameters.

And the fifth construction unit is used for constructing a target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system through an alternating-current excitation doubly-fed induction variable-speed pumped storage power station model, a wind power generation system model, a photovoltaic power generation system model and a power grid model, and establishing a mathematical simulation model of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system according to a preset modeling platform.

Optionally, in one embodiment of the present application, the modeling module 100 further includes: the first analog unit, the second analog unit, and the third analog unit.

The first simulation unit is used for simulating the transient characteristics of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the condition that the illumination intensity and the charge of the electricity consumption negative terminal in the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system are kept unchanged.

And the second simulation unit is used for simulating the transient characteristics of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the condition that the wind speed and the load of the electricity consumption negative terminal in the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system are kept unchanged.

And the third simulation unit is used for simulating the transient characteristics of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the condition that the wind speed and the illumination intensity in the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system are kept unchanged.

Optionally, in one embodiment of the application, the adjustment module 300 includes: the device comprises an acquisition unit, a frequency adjustment unit and a rotation speed adjustment unit.

The acquisition unit is used for acquiring a power grid frequency oscillation period and frequency amplitude corresponding to power grid parameters under each target application scene and a target rotating speed time and a maximum rotating speed rising rate of the alternating-current excitation double-fed induction type variable-speed pumping and accumulating unit corresponding to the alternating-current excitation double-fed induction type variable-speed pumping and accumulating power station model based on a preset power priority control strategy of the generating working condition of the variable-speed unit, PID parameters of a speed regulator and PI parameters of a converter.

And the frequency adjusting unit is used for determining the adjusting effect of the speed regulator and the converter on the transient characteristics of the power grid frequency system of each target application scene according to the power grid frequency oscillation period and the frequency amplitude.

The rotating speed adjusting unit is used for obtaining the effect of the speed regulator and the converter on adjusting the transient characteristics of the rotating speed system of the variable speed pumping and accumulating unit in each target application scene through the target rotating speed time and the maximum rotating speed rising rate.

It should be noted that the foregoing explanation of the embodiment of the method for generating the operation adjustment policy of the hybrid wind-solar power generation system is also applicable to the operation adjustment policy generating device of the hybrid wind-solar power generation system in this embodiment, and will not be repeated here.

The operation regulation strategy generation device of the water-wind-light hybrid power generation system provided by the embodiment of the application comprises a modeling module, a control module and a control module, wherein the modeling module is used for establishing a mathematical simulation model of a target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system, and simulating system transient characteristics of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the condition of target wind speed disturbance, target illumination intensity disturbance and target load disturbance respectively based on the mathematical simulation model; the analysis module is used for analyzing the influence of the capacity ratio of power grid parameters, hydropower, wind power and photoelectricity on transient characteristics in the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the simultaneous actions of target wind speed disturbance, target illumination intensity disturbance and target load disturbance based on the mathematical simulation model, and generating a system transient characteristic analysis result; the adjusting module is used for determining various target application scenes of the mathematical simulation model, analyzing the adjusting effect of the speed regulator and the converter of the target variable-speed pumped storage power station on the transient characteristic of the system in each of various target application scenes based on the transient characteristic analysis result and the mathematical simulation model, and generating an operation adjusting strategy of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system through the adjusting effect, so that the adjusting performance of the power grid is effectively improved, and theoretical and technical support is provided for the stable operation of the power grid in the novel power system.

Fig. 10 is a schematic structural diagram of an electronic device according to an embodiment of the present application. The electronic device may include:

Memory 1001, processor 1002, and a computer program stored on memory 1001 and executable on processor 1002.

The processor 1002 implements the operation adjustment strategy generation method of the water-wind-solar hybrid power generation system provided in the above embodiment when executing a program.

Further, the electronic device further includes:

A communication interface 1003 for communication between the memory 1001 and the processor 1002.

Memory 1001 for storing computer programs that may be run on processor 1002.

Memory 1001 may include high-speed RAM memory and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.

If the memory 1001, the processor 1002, and the communication interface 1003 are implemented independently, the communication interface 1003, the memory 1001, and the processor 1002 may be connected to each other through a bus and perform communication with each other. The bus may be an industry standard architecture (Industry Standard Architecture, abbreviated ISA) bus, an external device interconnect (PERIPHERAL COMPONENT, abbreviated PCI) bus, or an extended industry standard architecture (Extended Industry Standard Architecture, abbreviated EISA) bus, among others. The buses may be divided into address buses, data buses, control buses, etc. For ease of illustration, only one thick line is shown in fig. 10, but not only one bus or one type of bus.

Alternatively, in a specific implementation, if the memory 1001, the processor 1002, and the communication interface 1003 are integrated on a single chip, the memory 1001, the processor 1002, and the communication interface 1003 may perform communication with each other through internal interfaces.

The processor 1002 may be a central processing unit (Central Processing Unit, abbreviated as CPU), or an Application SPECIFIC INTEGRATED Circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present application.

The embodiment of the application also provides a computer readable storage medium, on which a computer program is stored, which when being executed by a processor, realizes the method for generating the operation regulation strategy of the water-wind-solar hybrid power generation system.

The embodiment of the application also provides a computer program product, which comprises a computer program, wherein the program is executed to realize the method for generating the operation regulation strategy of the water-wind-solar hybrid power generation system.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, "N" means at least two, for example, two, three, etc., unless specifically defined otherwise.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and additional implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order from that shown or discussed, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.

Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or N wires, a portable computer cartridge (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It is to be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the N steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.

Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.

The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like. While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims

1. The operation regulation strategy generation method of the water-wind-solar hybrid power generation system is characterized by comprising the following steps of:

Establishing a mathematical simulation model of a target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system, and simulating system transient characteristics of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the conditions of target wind speed disturbance, target illumination intensity disturbance and target load disturbance respectively based on the mathematical simulation model;

Based on the mathematical simulation model, analyzing the influence of the capacity ratio of power grid parameters, hydropower, wind power and photoelectricity in the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system on the transient characteristic under the simultaneous actions of the target wind speed disturbance, the target illumination intensity disturbance and the target load disturbance, and generating a system transient characteristic analysis result;

And determining multiple target application scenes of the mathematical simulation model, and analyzing the regulating effect of a speed regulator and a converter of the target variable-speed pumped storage power station on the transient characteristic of the system in each target application scene of the multiple target application scenes based on the transient characteristic analysis result and the mathematical simulation model so as to generate an operation regulating strategy of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system through the regulating effect.

2. The method of claim 1, wherein the establishing a mathematical simulation model of the target variable speed pumped-storage-wind power-photovoltaic hybrid power generation system comprises:

Establishing a target water pump water turbine model and a target generator motor model, and constructing an alternating-current excitation double-fed induction type variable-speed pumped storage power station model based on the target water pump water turbine model, the target generator motor model, a preset double-fed induction motor vector control strategy, a generator working condition power priority control strategy of a speed change unit and a pipeline equation solving strategy;

constructing a wind power generation system model through a preset wind turbine aerodynamic system model, a generator motion equation and a variable pitch system model;

Building a solar photovoltaic array through a plurality of solar photovoltaic panels, and building a photovoltaic power generation system model according to the solar photovoltaic array;

Constructing a power grid model based on the capacity ratio of the hydropower, the wind power and the photoelectricity in a target power grid and the power grid parameters;

And constructing the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system through the alternating-current excitation doubly-fed induction variable-speed pumped storage power station model, the wind power generation system model, the photovoltaic power generation system model and the power grid model, and establishing a mathematical simulation model of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system according to a preset modeling platform.

3. The method of claim 2, wherein simulating system transient characteristics of the target variable speed pumped storage-wind power-photovoltaic hybrid power generation system at a target wind speed disturbance, a target light intensity disturbance, and a target load disturbance, respectively, based on the mathematical simulation model comprises:

simulating the transient characteristics of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the condition that the illumination intensity and the charge of a negative electricity consumption end in the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system are kept unchanged;

Simulating the transient characteristics of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the condition that the wind speed and the charge of the electricity consumption negative terminal in the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system are kept unchanged;

And under the condition that the wind speed and the illumination intensity in the target variable-speed pumped-storage-wind power-photovoltaic hybrid power generation system are kept unchanged, simulating the transient characteristics of the target variable-speed pumped-storage-wind power-photovoltaic hybrid power generation system under the disturbance of the target load.

4. The method according to claim 2, wherein the determining a plurality of target application scenarios of the mathematical simulation model, and analyzing, based on the transient characteristic analysis result and the mathematical simulation model, an effect of adjusting the transient characteristic of the system by the speed regulator and the current transformer of the target variable speed pumped-storage power station in each of the plurality of target application scenarios, includes:

Acquiring a power grid frequency oscillation period and a frequency amplitude corresponding to the power grid parameters under each target application scene based on a preset power priority control strategy of a power generation working condition of the speed changer, PID parameters of the speed changer and PI parameters of the converter, and acquiring a target rotating speed time and a maximum rotating speed rising rate of the alternating current excitation doubly-fed induction type speed change pumping and accumulating unit corresponding to the alternating current excitation doubly-fed induction type speed change pumping and accumulating power station model;

Determining the adjusting effect of the speed regulator and the converter on the transient characteristics of the power grid frequency system of each target application scene according to the power grid frequency oscillation period and the frequency amplitude;

And obtaining the effect of the speed regulator and the converter on regulating the transient characteristics of the speed system of the variable speed pumping and accumulating unit in each target application scene through the target speed time and the maximum speed rising rate.

5. The method of claim 2, wherein the mathematical expression of the grid model is:

6. An operation regulation strategy generation device of a water-wind-solar hybrid power generation system is characterized by comprising:

The modeling module is used for establishing a mathematical simulation model of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system, and simulating system transient characteristics of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the conditions of target wind speed disturbance, target illumination intensity disturbance and target load disturbance respectively based on the mathematical simulation model;

The analysis module is used for analyzing the influence of the capacity ratio of power grid parameters, hydropower, wind power and photoelectricity in the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system on the transient characteristic under the simultaneous actions of the target wind speed disturbance, the target illumination intensity disturbance and the target load disturbance based on the mathematical simulation model, and generating a system transient characteristic analysis result;

and the adjusting module is used for determining various target application scenes of the mathematical simulation model, analyzing the adjusting effect of a speed regulator and a converter of the target variable-speed pumped storage power station on the transient characteristic of the system under each target application scene in the various target application scenes based on the transient characteristic analysis result and the mathematical simulation model, and generating an operation adjusting strategy of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system through the adjusting effect.

7. The apparatus of claim 6, wherein the modeling module comprises:

The first construction unit is used for establishing a target water pump water turbine model and a target generator motor model, and constructing an alternating-current excitation double-fed induction type variable-speed pumped storage power station model based on the target water pump water turbine model, the target generator motor model, a preset double-fed induction motor vector control strategy, a variable-speed unit generator working condition power priority control strategy and a pipeline equation solving strategy;

The second construction unit is used for constructing a wind power generation system model through a preset wind turbine aerodynamic system model, a generator motion equation and a pitch system model;

The third construction unit is used for building a solar photovoltaic array through a plurality of solar photovoltaic panels and constructing a photovoltaic power generation system model according to the solar photovoltaic array;

a fourth construction unit, configured to construct a power grid model based on the capacity ratio of the hydropower, the wind power, and the photovoltaic in a target power grid and the power grid parameter;

And the fifth construction unit is used for constructing the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system through the alternating-current excitation doubly-fed induction variable-speed pumped storage power station model, the wind power generation system model, the photovoltaic power generation system model and the power grid model, and establishing a mathematical simulation model of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system according to a preset modeling platform.

8. The apparatus of claim 7, wherein the modeling module further comprises:

the first simulation unit is used for simulating the transient characteristics of the system of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the condition that the illumination intensity and the charge of the charge negative terminal in the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system are kept unchanged;

The second simulation unit is used for simulating the transient characteristics of the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system under the condition that the wind speed and the electricity consumption negative terminal load in the target variable-speed pumped storage-wind power-photovoltaic hybrid power generation system are kept unchanged;

and the third simulation unit is used for simulating the transient characteristics of the target variable-speed pumped-storage-wind power-photovoltaic hybrid power generation system under the condition that the wind speed and the illumination intensity in the target variable-speed pumped-storage-wind power-photovoltaic hybrid power generation system are kept unchanged.

9. The apparatus of claim 7, wherein the adjustment module comprises:

The acquisition unit is used for acquiring a power grid frequency oscillation period and a frequency amplitude corresponding to the power grid parameters under each target application scene and a target rotating speed time and a maximum rotating speed rising rate of the alternating-current excitation double-fed induction type variable-speed pumping and accumulating unit corresponding to the alternating-current excitation double-fed induction type variable-speed pumping and accumulating power station model based on a preset power priority control strategy of the generating working condition of the variable-speed unit, PID parameters of the speed regulator and PI parameters of the converter;

The frequency adjusting unit is used for determining the adjusting effect of the speed regulator and the converter on the transient characteristics of the power grid frequency system of each target application scene according to the power grid frequency oscillation period and the frequency amplitude;

and the rotating speed adjusting unit is used for obtaining the effect of the speed regulator and the converter on adjusting the transient characteristics of the rotating speed system of the variable speed pumping and accumulating unit of each target application scene through the target rotating speed time and the maximum rotating speed rising rate.

10. The apparatus of claim 6, wherein the mathematical expression of the grid model is:

11. An electronic device, comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the operation regulation strategy generation method of the water-wind-solar hybrid power generation system according to any one of claims 1 to 5.

12. A computer-readable storage medium having stored thereon a computer program, characterized in that the program is executed by a processor for realizing the operation regulation strategy generation method of the water-wind-solar hybrid power generation system according to any one of claims 1 to 5.

13. A computer program product comprising a computer program which, when executed, is adapted to implement the method of generating an operational regulation strategy for a hybrid wind and solar power system according to any one of claims 1-5.