Simulation real-time interaction method, simulation real-time interaction device and simulation real-time interaction equipment for offshore wind plant matched energy storage access power grid

Abstract

The invention relates to a simulation real-time interaction method, device and equipment for an energy storage access power grid matched with an offshore wind plant. The method comprises the following steps: acquiring a topological structure diagram, operation data, an operation environment and power equipment data of the energy storage access power grid matched with the offshore wind plant; constructing an offshore wind power model by adopting a visual simulation tool according to the topological structure diagram, the operation data and the power equipment data; constructing an electromechanical transient power grid model by adopting power system simulation software according to the topological structure diagram and the operating environment; converting the electromechanical transient power grid model to obtain a functional model; and the electromechanical transient power grid model and the offshore wind power model are interconnected through the functional model to obtain a joint real-time simulation model. According to the method, interconnection of an electromechanical transient power grid model and an offshore wind power model is realized through a functional model, so that data interaction between energy storage and a power grid in an offshore wind power plant matched energy storage access power grid is realized, and real-time simulation of the offshore wind power plant matched energy storage access power grid is facilitated.

Description

Technical Field

[0001] The present application relates to the field of simulation technology, and in particular to a simulation real-time interactive method, device and equipment for connecting an offshore wind farm supporting energy storage to a power grid. Background Art

[0002] The existing simulation grid of new energy stations mainly uses equivalent impedance in series with ideal voltage sources to simulate, which cannot simulate the actual environment such as the inertia of the grid, and cannot reflect the real interaction between new energy stations and energy storage and the grid in a real-time simulation environment. Therefore, how to efficiently perform real-time electromagnetic transient modeling and simulation of the actual offshore wind farm and its supporting energy storage power station with lower simulation resources and existing resources. Summary of the invention

[0003] The present application provides a method, device and equipment for simulating real-time interaction of supporting energy storage for offshore wind farms to access the power grid, which is used to solve the technical problem that the energy storage and the power grid of the existing new energy station simulation power grid cannot interact, resulting in the inability to simulate in real time.

[0004] In order to achieve the above objectives, this application provides the following technical solutions:

[0005] On the one hand, a simulation real-time interactive method for connecting an offshore wind farm supporting energy storage to a power grid is provided, comprising the following steps:

[0006] Obtaining a topological structure diagram, operating data and operating environment of the offshore wind farm supporting energy storage access to the power grid, and obtaining power equipment data based on the topological structure diagram;

[0007] According to the topological structure diagram, the operating data and the power equipment data, a visual simulation tool is used to construct an offshore wind power model; according to the topological structure diagram and the operating environment, a power system simulation software is used to construct an electromechanical transient power grid model;

[0008] Converting the electromechanical transient power grid model to obtain a functional model;

[0009] The electromechanical transient power grid model and the offshore wind power model are interconnected through the functional model to obtain a joint real-time simulation model.

[0010] Preferably, converting the electromechanical transient power grid model to obtain a functional model includes:

[0011] The electromechanical transient power grid model is converted into an analysis and synthesis program model using a power system analysis and synthesis program;

[0012] Use power system simulation software to convert the analytical synthesis program model into a functional model;

[0013] The visual simulation tool and the power system simulation software are interconnected through the functional model, so that the electromechanical transient power grid model and the offshore wind power model are interconnected.

[0014] Preferably, before the electromechanical transient power grid model and the offshore wind power model are interconnected through the functional model, the simulation real-time interaction method includes:

[0015] Setting a configuration module on the real-time digital simulation platform of the visual simulation tool, wherein the configuration module is used to configure an IP address and a port number;

[0016] A calling file is provided on the power system simulation software.

[0017] Preferably, before constructing the offshore wind power model, the simulation real-time interaction method includes: establishing a wind turbine model library, an energy storage model library and an SVG model library on the time step real-time simulation platform of the visual simulation tool; the SVG model library is used to output a three-phase voltage signal according to the input of the three-phase voltage, three-phase current and control signal of the grid connection point.

[0018] Preferably, the wind turbine model includes a wave recording management module, a model setting module, a wind turbine control module, a wind turbine input and output control module, a signal selection module, a transmission chain module, a signal transmission module and a wind turbine module; the model setting module is connected to the wind turbine control module and the signal transmission module respectively; the energy storage model library includes a model setting module and an energy storage inverter control module and a three-phase high-voltage cascade energy storage model module connected to the model setting module;

[0019] The recording management module is used to set the recording mode and output the recording control signal;

[0020] The model setting module is used to set the control parameters of each fan operation mode and output a control signal, and transmit the control signal to the fan control module and the signal transmission module;

[0021] The fan control module is used to set the control algorithm of each fan operation mode and output each control quantity, enable signal and recording signal of each fan according to each input signal of each fan;

[0022] The fan in / out control module is used to set the grid connection strategy for each fan automatic control and control the corresponding fan to automatically start and run according to the signal quantity;

[0023] The signal selection module is used to automatically output the measurement data of the corresponding fan operation according to the selected fan serial number;

[0024] The transmission chain module is used to extract the active power reference value, rotation speed and pitch angle of the corresponding wind turbine from the wind turbine characteristic curve of each wind turbine according to the wind speed;

[0025] The signal transmission module is used to realize the communication between the CPU model and the FPGA model;

[0026] The wind turbine module is used to match the wind turbine model output to the wind turbine model connected to the power grid;

[0027] The model setting module is used to set the model and input the model electrical signal directly connected to the energy storage inverter control module and the three-phase high-voltage cascade energy storage module;

[0028] The energy storage inverter control module is used to set the control algorithm and output the SC observation signal and the PWM control signal according to the corresponding control algorithm of the corresponding model according to the model electrical signal;

[0029] The three-phase high-voltage cascade energy storage model module is used to set the operating parameters of the three-phase high-voltage cascade energy storage module and output the measurement point values ​​of the primary circuit and communicate the measurement point values ​​with the IP core in the FPGA model through the signal output module.

[0030] Preferably, the simulation real-time interaction method for connecting the supporting energy storage of the offshore wind farm to the power grid comprises: performing simulation test on the joint real-time simulation model; performing simulation test on the joint real-time simulation model comprises:

[0031] Obtaining a test type and test data corresponding to the test type;

[0032] According to the test type, setting is performed on the joint real-time simulation model according to the corresponding test data, and simulation testing is performed on the joint real-time simulation model to obtain a test result;

[0033] Among them, the test types include wind speed steady-state test, wind speed step test, energy storage steady-state test, energy storage power step test, energy storage tracking wind power forecast output test and frequency change test.

[0034] Preferably, the real-time interactive method for simulating the connection of the supporting energy storage of the offshore wind farm to the power grid comprises: setting the IP address of the mobile terminal where the visual simulation tool is located to 192.168.10.105, the remote port number to 15457 and the local port number to 15458, and correspondingly setting the IP address of the mobile terminal where the power system simulation software is located to 192.168.10.200, the remote port number to 15457 and the local port number to 15458.

[0035] Preferably, constructing an offshore wind power model using a visual simulation tool according to the topological structure diagram, the operating data and the power equipment data includes:

[0036] According to the topology diagram and the power equipment data, a time step real-time simulation platform of a visual simulation tool is used to construct an FPGA model, wherein the FPGA model includes an energy storage model and a wind turbine model;

[0037] Building a CPU model on a real-time digital simulation platform using a visual simulation tool according to the topology diagram and the operation data;

[0038] The offshore wind power model is obtained according to the CPU model and the FPGA model;

[0039] Among them, the CPU model is used to observe and issue instructions, and to control the simulation of wind power plants, reactive compensation equipment and energy storage batteries in the offshore wind farm supporting energy storage access to the power grid according to the instructions, so as to realize the functions of tracking power grid dispatching instructions, smoothing wind power output, inertia response, and primary frequency regulation.

[0040] In another aspect, a simulation real-time interactive device for connecting an offshore wind farm supporting energy storage to a power grid is provided, comprising a data acquisition module, a model building module, a model conversion module and an interconnection module;

[0041] The data acquisition module is used to obtain the topological structure diagram, operation data and operation environment of the offshore wind farm supporting energy storage access to the power grid, and obtain power equipment data according to the topological structure diagram;

[0042] The model building module is used to build an offshore wind power model using a visual simulation tool according to the topological structure diagram, the operating data and the power equipment data; and to build an electromechanical transient power grid model using a power system simulation software according to the topological structure diagram and the operating environment;

[0043] The model conversion module is used to convert the electromechanical transient power grid model to obtain a functional model;

[0044] The interconnection module is used to interconnect the electromechanical transient power grid model and the offshore wind power model through the functional model to obtain a joint real-time simulation model.

[0045] Preferably, the model conversion module is also used to convert the electromechanical transient power grid model into an analysis and synthesis program model using a power system analysis and synthesis program, and to convert the analysis and synthesis program model into a functional model using a power system simulation software; wherein the visual simulation tool and the power system simulation software are interconnected through the functional model to interconnect the electromechanical transient power grid model and the offshore wind power model.

[0046] Preferably, the real-time interactive device for simulating the connection of the supporting energy storage to the power grid of the offshore wind farm comprises a configuration module, which is used to set the configuration module on the real-time digital simulation platform of the visual simulation tool, and the configuration module is used to configure the IP address and port number, and a call file is set on the power system simulation software.

[0047] Preferably, the configuration module is also used to set the IP address of the mobile terminal where the visual simulation tool is located to 192.168.10.105, the remote port number to 15457 and the local port number to 15458, and correspondingly set the IP address of the mobile terminal where the power system simulation software is located to 192.168.10.200, the remote port number to 15457 and the local port number to 15458.

[0048] Preferably, the model construction module is also used to construct an FPGA model based on the topology diagram and the power equipment data using a time step real-time simulation platform of a visual simulation tool, the FPGA model including an energy storage model and a wind turbine model; construct a CPU model on a real-time digital simulation platform of a visual simulation tool based on the topology diagram and the operating data; obtain the offshore wind power model based on the CPU model and the FPGA model; wherein the CPU model is used to observe and issue instructions and to control the simulation of wind power plants, reactive compensation equipment and energy storage batteries in the offshore wind farm supporting energy storage access to the power grid according to the instructions.

[0049] On the other hand, a computer-readable storage medium is provided, wherein the computer-readable storage medium is used to store computer instructions, and when the computer-readable storage medium is executed on a computer, the computer executes the above-mentioned simulation real-time interactive method for connecting supporting energy storage of an offshore wind farm to a power grid.

[0050] In another aspect, a terminal device is provided, comprising a processor and a memory;

[0051] The memory is used to store program codes and transmit the program codes to the processor;

[0052] The processor is used to execute the above-mentioned simulation real-time interactive method for connecting the supporting energy storage of the offshore wind farm to the power grid according to the instructions in the program code.

[0053] The method, device and equipment for simulating real-time interaction of supporting energy storage for offshore wind farms to access the power grid. The method for simulating real-time interaction of supporting energy storage for offshore wind farms to access the power grid includes obtaining a topological structure diagram, operating data and an operating environment of supporting energy storage for offshore wind farms to access the power grid, and obtaining power equipment data according to the topological structure diagram; using a visual simulation tool to build an offshore wind power model according to the topological structure diagram, the operating data and the power equipment data; using power system simulation software to build an electromechanical transient power grid model according to the topological structure diagram and the operating environment; converting the electromechanical transient power grid model to obtain a functional model; and interconnecting the electromechanical transient power grid model with the offshore wind power model through the functional model to obtain a joint real-time simulation model.

[0054] It can be seen from the above technical scheme that the present application has the following advantages: the simulation real-time interaction method of the supporting energy storage of the offshore wind farm connected to the power grid realizes the interconnection of the electromechanical transient power grid model and the offshore wind power model through the functional model, so that the data between the energy storage and the power grid in the supporting energy storage of the offshore wind farm connected to the power grid can interact, which is convenient for the real-time simulation of the supporting energy storage of the offshore wind farm connected to the power grid, and solves the technical problem that the energy storage and the power grid of the existing new energy station simulation power grid cannot interact, resulting in the inability to simulate in real time.

[0055] The simulation real-time interactive device for connecting the supporting energy storage of the offshore wind farm to the power grid realizes the construction of a joint real-time simulation model through a data acquisition module, a model construction module, a model conversion module and an interconnection module. The data between the energy storage and the power grid in the connection of the supporting energy storage of the offshore wind farm to the power grid is interacted through the joint real-time simulation model, which facilitates the real-time simulation of the connection of the supporting energy storage of the offshore wind farm to the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0057] Figure 1 A flowchart of the steps of the simulation real-time interactive method for connecting an offshore wind farm supporting energy storage to a power grid as described in an embodiment of the present application;

[0058] Figure 2 A grid location information diagram of a mechanical and electrical transient grid model constructed with BPA data in a simulation real-time interactive method for connecting an offshore wind farm supporting energy storage to a grid as described in an embodiment of the present application;

[0059] Figure 3 For Figure 2 The corresponding grid location information diagram converted into a functional model;

[0060] Figure 4 A CPU model diagram of an offshore wind power model in a simulation real-time interactive method for connecting an offshore wind farm supporting energy storage to a power grid as described in an embodiment of the present application;

[0061] Figure 5 The wind turbine inertia response and primary frequency modulation test diagram of the wind farm in the simulation real-time interactive method for connecting the offshore wind farm supporting energy storage to the power grid described in the embodiment of the present application;

[0062] Figure 6 It is the energy storage inertia response and primary frequency modulation test diagram of the simulation real-time interactive method for connecting the offshore wind farm supporting energy storage to the power grid as described in the embodiment of the present application;

[0063] Figure 7 This is a test diagram of a wind turbine output at a rated wind speed in a simulation real-time interactive method for connecting an offshore wind farm supporting energy storage to a power grid as described in an embodiment of the present application;

[0064] Figure 8 This is a test diagram of a wind turbine output at a rated wind speed in a simulation real-time interactive method for connecting an offshore wind farm supporting energy storage to a power grid as described in an embodiment of the present application;

[0065] Fig. 9 This is a wind speed step test diagram in the simulation real-time interactive method for connecting an offshore wind farm supporting energy storage to a power grid as described in an embodiment of the present application;

[0066] Fig.10 Another wind speed step test diagram in the simulation real-time interactive method for connecting an offshore wind farm supporting energy storage to a power grid as described in an embodiment of the present application;

[0067] Fig.11 A waveform diagram of the energy storage active power 1pu in the simulation real-time interactive method for connecting the offshore wind farm supporting energy storage to the power grid as described in the embodiment of the present application;

[0068] Fig.12 A waveform diagram of the energy storage active power -1pu in the simulation real-time interactive method for connecting the offshore wind farm supporting energy storage to the power grid as described in the embodiment of the present application;

[0069] Fig.13 It is a waveform diagram of energy storage step test 1 in the simulation real-time interactive method for connecting offshore wind farm supporting energy storage to the power grid as described in the embodiment of the present application;

[0070] Fig.14 It is a waveform diagram of energy storage step test 2 in the simulation real-time interactive method for connecting offshore wind farm supporting energy storage to the power grid as described in the embodiment of the present application;

[0071] Fig.15It is a waveform diagram of energy storage step test 3 in the simulation real-time interactive method for connecting offshore wind farm supporting energy storage to the power grid as described in the embodiment of the present application;

[0072] Fig.16 The waveform of energy storage to smooth the fluctuation of wind power output in the simulation real-time interactive method for connecting the supporting energy storage of the offshore wind farm to the power grid described in the embodiment of the present application;

[0073] Fig.17 A schematic diagram of a framework of a simulated real-time interactive device for connecting an offshore wind farm supporting energy storage to a power grid as described in an embodiment of the present application;

[0074] Fig.18 A schematic diagram of a terminal device described in an embodiment of the present application. DETAILED DESCRIPTION

[0075] In order to make the purpose, features, and advantages of the invention of this application more obvious and easy to understand, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described below are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0076] In the description of the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0077] In the embodiments of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0078] At present, the capacity of new energy power generation such as wind power, photovoltaic power, and energy storage in the power grid is constantly increasing. There is an urgent practical demand for grid-connected simulation test analysis of new energy stations and supporting energy storage for new energy stations. New energy grid-connected simulation is not subject to the limits of field test conditions and can test the characteristics of new energy stations to the greatest extent. The standards such as "GB / T19963.1-2021 Technical Regulations for Wind Farm Access to Power System Part 1: Onshore Wind Power" and "DL / T1870-2018 Technical Specifications for Power System Network Source Coordination" and other power system stability guidelines clearly require new energy stations to provide "electromagnetic transient and electromechanical transient simulation models" to be used for the electromechanical transient and electromagnetic transient simulation calculation models and parameters of new energy units, new energy station collection systems, new energy field reactive compensation devices, and station-level control systems for power system simulation calculations, which are used for the planning, design, and dispatching and operation of new energy stations accessing the power system. Taking wind farms as an example within the scope of the power grid, the relevant modeling standards include "Electrical Simulation Modeling and Verification Procedures for Wind Farms" and "Impedance Frequency Characteristics Modeling and Verification Procedures for Wind Turbine Units".

[0079] At present, the modeling business scope is actively expanding in the fields of onshore wind power, photovoltaics, new energy + energy storage, etc. Taking wind power as an example, the grid-connected simulation test projects currently required by the power grid for wind farms include: first, wind farm power quality assessment, second, wind farm electrical simulation model modeling and verification, third, wind farm reactive compensation device SVG electrical simulation modeling, fourth, wind farm high and low voltage ride-through capability verification, fifth, wind farm reactive compensation device high and low voltage ride-through capability verification, and sixth, wind farm grid adaptability verification. At present, the high and low voltage ride-through capability verification of a single wind turbine and a dynamic reactive compensation device is achieved through RT-LAB real-time simulation hardware-in-the-loop test, while the station-level modeling of wind farms is based on the actual topology and parameters of the offshore wind farm, using electromechanical-electromagnetic hybrid simulation software to perform offline 1~10ms scale, which can only reflect the electromechanical transient modeling of the positive sequence component; the simulation business for energy storage has not yet been carried out.

[0080] Patent terms:

[0081] The PSD-BPA model is mainly used for power system flow analysis and transient stability calculation, and is suitable for simulation and analysis of large-scale power systems.

[0082] The PSASP model is mainly used for power system analysis, including power flow calculation, optimal power flow, short-circuit calculation, transient stability analysis, small disturbance stability analysis, voltage and frequency stability analysis, and power quality analysis.

[0083] Power System Analysis Software Package (PSASP) is a long-standing, powerful, and easy-to-use power system analysis program. It is a large-scale software package with resource sharing, ease of use, high integration, and openness.

[0084] Real-time digital simulation platform is a software platform for developing, verifying and validating real-time digital simulation systems. It provides a powerful environment for designing and analyzing digital control systems, including analog and mixed signal processing.

[0085] SVG (Static Var Generator) is a reactive power compensation device used in power grids. It is mainly used to dynamically adjust the reactive power in the power grid to ensure the stable operation of the power grid. SVG uses fully controlled power electronic devices (such as IGBT) to detect changes in grid voltage in real time and quickly generate or absorb reactive power as needed, so that the power factor of the power station is close to 1, maximizing the transmission of effective power.

[0086] The signal output module refers to a plurality of half-brick power modules (such as CHB modules) connected in cascade.

[0087] The embodiments of the present application provide a method, device and equipment for simulating real-time interaction of supporting energy storage in offshore wind farms to access the power grid, which solves the technical problem that the energy storage and the power grid of the existing new energy station simulation power grid cannot interact, resulting in the inability to simulate in real time.

[0088] Embodiment 1:

[0089] Figure 1 This is a flowchart of the steps of a simulated real-time interactive method for connecting an offshore wind farm supporting energy storage to a power grid as described in an embodiment of the present application.

[0090] like Figure 1 As shown, the embodiment of the present application provides a simulation real-time interactive method for connecting an offshore wind farm supporting energy storage to a power grid, comprising the following steps:

[0091] S1. Obtain the topological structure diagram, operation data and operation environment of the offshore wind farm supporting energy storage connected to the power grid, and obtain the power equipment data based on the topological structure diagram.

[0092] It should be noted that in step S1, the data required for the construction of a simulation model for the supporting energy storage of an offshore wind farm to access the power grid include a topological structure diagram, operating data, operating environment, and power equipment data. In this embodiment, the operating data includes electrical quantity parameters and operating modes of each power equipment. The power equipment data includes three-phase submarine cables, multiple dynamic reactive power compensation devices SVG, multiple three-winding transformers, several wind turbine collection cable lines, three-phase shunt reactors, multiple wind turbine generator sets, and multiple step-up transformers. Among them, electrical quantity parameters include rated power, rated voltage, rated current, capacitance, resistance, transformation ratio, etc. The operating mode includes the on-load voltage regulation mode of the transformer, the off-load voltage regulation mode of the wind turbine, etc. The operating environment includes the maximum positive sequence, maximum zero sequence, minimum positive sequence, minimum zero sequence, equipment operation software environment, etc. of the bus system. A topological structure diagram formed based on BPA data.

[0093] S2. Use visual simulation tools to build an offshore wind power model based on the topological structure diagram, operating data and power equipment data; use power system simulation software to build an electromechanical transient power grid model based on the topological structure diagram and operating environment.

[0094] It should be noted that in step S2, different simulation tools are used to construct the offshore wind power model and the electromechanical transient power grid model according to the data obtained in step S1, so as to provide data for the subsequent operation. In this embodiment, for the offshore wind farm supporting energy storage access to the power grid, since the operating environment of the offshore wind farm is different from that of the onshore power grid, the corresponding simulation model cannot be constructed on a single simulation platform. Therefore, it is necessary to use a visual simulation tool to construct the offshore wind power model according to the topological structure diagram, operating data and power equipment data; and use power system simulation software to construct the electromechanical transient power grid model according to the topological structure diagram and operating environment.

[0095] S3. Convert the electromechanical transient power grid model to obtain a functional model.

[0096] It should be noted that in step S3, the electromechanical transient power grid model constructed in step S2 is compiled and converted to obtain a functional model that can be interconnected with the real-time digital simulation platform of the visual simulation tool. In this embodiment, the real-time interactive simulation method for connecting the offshore wind farm supporting energy storage to the power grid first realizes the interconnection of the two different simulation platforms of the visual simulation tool and the power system simulation software through UDP / IP, and then the electromechanical transient power grid model and the offshore wind power model are interconnected by the functional model. Among them, the visual simulation tool and the power system simulation software are interconnected through UDP / IP.

[0097] S4. The electromechanical transient power grid model and the offshore wind power model are interconnected through the functional model to obtain a joint real-time simulation model.

[0098] It should be noted that in step S4, the electromechanical transient power grid model and the offshore wind power model constructed in step S2 are interconnected according to the functional model obtained in step S3 to obtain a joint real-time simulation model, and the data between the energy storage and the power grid in the supporting energy storage of the offshore wind farm is connected to the power grid through the joint real-time simulation model, which facilitates the real-time simulation of the supporting energy storage of the offshore wind farm connected to the power grid. In this embodiment, the constructed joint real-time simulation model can be used to support the inertia response of the new energy supporting energy storage station and the primary frequency regulation grid connection evaluation based on simulation.

[0099] The present application provides a simulation real-time interactive method for connecting supporting energy storage to the power grid of an offshore wind farm, including obtaining a topological structure diagram, operating data and operating environment of the supporting energy storage of the offshore wind farm connected to the power grid, obtaining power equipment data according to the topological structure diagram; constructing an offshore wind power model using a visual simulation tool according to the topological structure diagram, operating data and power equipment data; constructing an electromechanical transient power grid model using power system simulation software according to the topological structure diagram and the operating environment; converting the electromechanical transient power grid model to obtain a functional model; interconnecting the electromechanical transient power grid model with the offshore wind power model through the functional model to obtain a joint real-time simulation model. The simulation real-time interactive method for connecting supporting energy storage to the power grid of an offshore wind farm realizes the interconnection between the electromechanical transient power grid model and the offshore wind power model through the functional model, so that the data between the energy storage and the power grid in the supporting energy storage of the offshore wind farm connected to the power grid are interacted, which facilitates the real-time simulation of the supporting energy storage of the offshore wind farm connected to the power grid; it solves the technical problem that the energy storage and the power grid of the existing new energy station simulation power grid cannot interact, resulting in the inability to simulate in real time.

[0100] Figure 2 The grid location information diagram of the electromechanical transient grid model constructed with BPA data in the simulation real-time interactive method for connecting the offshore wind farm supporting energy storage to the grid described in the embodiment of the present application is Figure 3 For Figure 2 The grid location information diagram corresponding to the conversion into the functional model.

[0101] In one embodiment of the present application, converting the electromechanical transient power grid model to obtain a functional model includes:

[0102] The electromechanical transient power grid model is converted into an analysis and synthesis program model using a power system analysis and synthesis program;

[0103] Use power system simulation software to convert the analytical synthesis program model into a functional model;

[0104] Among them, the visual simulation tool and the power system simulation software are interconnected through the functional model to interconnect the electromechanical transient power grid model and the offshore wind power model.

[0105] It should be noted that in the process of converting the electromechanical transient power grid model to obtain the functional model, the electromechanical transient power grid model based on the BAP data is first constructed using the power system simulation software based on the topological structure diagram and the operating environment, such as Figure 2 As shown, the electromechanical transient power grid model of BAP data is first converted into an analysis and synthesis program model, and then the analysis and synthesis program model is compiled into a functional model that can be interconnected with the visual simulation tool, such as Figure 3 As shown, the model building based on the power system simulation software is completed. The real-time interactive simulation method for connecting the supporting energy storage to the power grid of the offshore wind farm can meet the requirement of no less than 200 grid nodes through the joint real-time simulation model constructed by the functional model. In the embodiment of the present application, the analysis and synthesis program model is also called the PSASP model. The constructed electromechanical transient power grid model is converted from BPA to PSASP program and from PSASP to power system simulation software program to obtain a functional model, and then simulated by the joint real-time simulation model to obtain a power grid structure and parameters that are the same as the original data in BPA, which can perform flow calculations and real-time simulation calculations, verifying that the electromechanical transient power grid model and the offshore wind power model are interconnected through the functional model to construct a joint real-time simulation model, which can realize the integration of joint real-time simulation of energy storage and power grid.

[0106] In one embodiment of the present application, before the electromechanical transient power grid model and the offshore wind power model are interconnected through the functional model, the simulation real-time interaction method includes:

[0107] Setting a configuration module on a real-time digital simulation platform of a visual simulation tool, where the configuration module is used to configure an IP address and a port number;

[0108] A call file is set on the power system simulation software;

[0109] Among them, the IP address of the mobile terminal where the visual simulation tool is located is set to 192.168.10.105, the remote port number is set to 15457, and the local port number is set to 15458. Correspondingly, the IP address of the mobile terminal where the power system simulation software is located is set to 192.168.10.200, the remote port number is set to 15457, and the local port number is set to 15458.

[0110] It should be noted that before building the joint real-time simulation model, a configuration module is first set on the real-time digital simulation platform of the visual simulation tool. The configuration module can be understood as building a UDP communication model library, adding OpIPSocketCtrl module, OpAsyncSend module and receive message module on the real-time digital simulation platform. The OpIPSocketCtrl module is used to configure the IP address and port number, etc. The OpAsyncSend module is used to send signals, and the receive message module is used to receive signals. A call file must also be set on the power system simulation software, so that the interconnection between the electromechanical transient power grid model and the offshore wind power model can be realized through the functional model. In this embodiment, after the configuration module of the visual simulation tool is set, it is necessary to add UDP communication related files to the file of the real-time digital simulation platform of the visual simulation tool, which are AsyncIP.c, AsyncIP.mk, and AsyncIPUtils.h. It is necessary to pay attention to the settings of IP address and port. For example, when configuring the "OpIPSocketCtrl module", the IP address of the real-time digital simulation platform of the visual simulation tool needs to be changed to 192.168.10.105, the computer IP address used by the power system simulation software is 192.168.10.200, the remote port number is set to 15457, and the local port number is set to 15458. The port number cannot be changed to others to ensure that the communication between the electromechanical transient power grid model and the offshore wind power model in the joint real-time simulation model is not disconnected.

[0111] Figure 4 This is a CPU model diagram of the offshore wind power model in the simulation real-time interactive method for connecting the offshore wind farm supporting energy storage to the power grid as described in the embodiment of the present application.

[0112] In one embodiment of the present application, constructing an offshore wind power model using a visual simulation tool according to a topology diagram, operation data, and power equipment data includes:

[0113] According to the topology diagram and power equipment data, the time step real-time simulation platform of the visual simulation tool is used to build an FPGA model, which includes an energy storage model and a wind turbine model;

[0114] Build a CPU model on a real-time digital simulation platform using a visual simulation tool based on the topology diagram and operating data;

[0115] Based on the CPU model and FPGA model, an offshore wind power model is obtained;

[0116] The CPU model is used to observe and issue instructions, and to control the simulation of wind power plants, reactive compensation equipment and energy storage batteries in the offshore wind farm supporting energy storage access to the power grid according to the instructions, so as to realize the functions of tracking power grid dispatching instructions, smoothing wind power output, inertia response and primary frequency regulation.

[0117] It should be noted that the topology diagram and power equipment data are first compiled into a bin file, and then the bin file is input into the time step real-time simulation platform of the visual simulation tool to build the FPGA model. The CPU model is constructed on the real-time digital simulation platform of the visual simulation tool according to the topology diagram and operation data. In this embodiment, the wind turbine model includes a motor model and a two-level converter model, and the simulation step is 1 microsecond. The energy storage model includes an energy storage battery model and a multi-level converter model, and the simulation step is 100 nanoseconds. Figure 4 As shown in the figure, SC_Console is the interface for observation and issuing instructions. The CPU model includes an oscilloscope and a module for issuing instructions. SS_WT_Control is for the control of the wind power plant, SS_SVG_Control is for the control of SVG, and SS_CHB_Control is for the control of the energy storage battery. It has the functions of tracking grid dispatching instructions, smoothing wind power output, inertia response, and primary frequency regulation. SM is the main circuit model, which is built according to the actual grid. For example, every 18 wind turbines are grouped together and connected to the grid through 2 collector lines. The actual wind speed is generated and injected into each wind turbine. The energy storage performs power compensation based on the error between the dispatched power and the actual power. The CPU model is a dynamic link library model provided by the manufacturer.

[0118] In an embodiment of the present application, before constructing an offshore wind power model, the simulation real-time interactive method for connecting the offshore wind farm supporting energy storage to the power grid includes: establishing a wind turbine model library, an energy storage model library and an SVG model library on a time step real-time simulation platform of a visual simulation tool.

[0119] It should be noted that the wind turbine model library includes a wave recording management module, a model setting module, a wind turbine control module, a wind turbine input and output control module, a signal selection module, a transmission chain module, a signal transmission module and a wind turbine module. The model setting module is connected to the wind turbine control module and the signal transmission module respectively. In this embodiment, the wave recording management module is used to set the wave recording mode and output the wave recording control signal. The model setting module is used to set the control parameters of each wind turbine operation mode and output the control signal, and transmit the control signal to the wind turbine control module and the signal transmission module. The wind turbine control module is used to set the control algorithm of each wind turbine operation mode and output each control quantity, enable signal and wave recording signal of each wind turbine according to the input signals of each wind turbine. The wind turbine input and output control module is used to set the grid connection strategy of each wind turbine automatic control and control the corresponding wind turbine to automatically start and run according to the signal quantity. The signal selection module is used to automatically output the measurement data of the corresponding wind turbine operation according to the selected wind turbine serial number. The transmission chain module is used to extract the active power reference value, speed and pitch angle of the corresponding wind turbine from the wind turbine characteristic curve of each wind turbine according to the wind speed. The signal transmission module is used to realize the communication between the CPU model and the FPGA model. The fan module is used to match the fan model output connected to the power grid (it only includes the communication module between the fan and the signal transmission module and a current source for injecting current into the power grid).

[0120] In an embodiment of the present application, the energy storage model library includes a model setting module and an energy storage inverter control module and a three-phase high-voltage cascade energy storage model module connected to the model setting module.

[0121] It should be noted that the model setting module is used to set the model and input the model electrical signal directly connected to the energy storage inverter control module and the three-phase high-voltage cascade energy storage module. The energy storage inverter control module is used to set the control algorithm and output the SC observation signal and PWM control signal according to the corresponding model according to the corresponding control algorithm based on the model electrical signal; the three-phase high-voltage cascade energy storage model module is used to set the operating parameters of the three-phase high-voltage cascade energy storage module and output the measurement point value (voltage and current signal) of the primary circuit and communicate the measurement point value with the IP core in the FPGA model through the signal output module.

[0122] In an embodiment of the present application, the SVG model library includes an SVG control algorithm and an SVG topology structure, and the SVG model library is used to output a three-phase voltage signal based on input signals such as a three-phase voltage, a three-phase current and a control signal at a grid connection point.

[0123] Figure 5 The inertia response and primary frequency modulation test diagram of the wind farm in the simulation real-time interactive method for connecting the offshore wind farm supporting energy storage to the power grid described in the embodiment of the present application, Figure 6This is a diagram of energy storage inertia response and primary frequency modulation test of a simulation real-time interactive method for connecting an offshore wind farm supporting energy storage to a power grid as described in an embodiment of the present application. Figure 7 This is a test diagram of a wind turbine with a rated wind speed in a simulation real-time interactive method for connecting an offshore wind farm supporting energy storage to a power grid as described in an embodiment of the present application. Figure 8 This is a test diagram of a wind turbine with a rated wind speed in a simulation real-time interactive method for connecting an offshore wind farm supporting energy storage to a power grid as described in an embodiment of the present application. Fig. 9 This is a wind speed step test diagram in the simulation real-time interactive method for connecting an offshore wind farm supporting energy storage to a power grid as described in an embodiment of the present application. Fig.10 This is another wind speed step test diagram in the simulation real-time interactive method for connecting an offshore wind farm supporting energy storage to a power grid as described in an embodiment of the present application. Fig.11 This is a waveform diagram of the energy storage active power 1pu in the simulation real-time interactive method for connecting the offshore wind farm supporting energy storage to the power grid as described in the embodiment of the present application, Fig.12 This is a waveform diagram of the energy storage active power -1pu in the simulation real-time interactive method for connecting the offshore wind farm supporting energy storage to the power grid described in the embodiment of the present application, Fig.13 This is a waveform diagram of energy storage step test 1 in the simulation real-time interactive method for connecting offshore wind farm supporting energy storage to the power grid described in the embodiment of the present application, Fig.14 This is a waveform diagram of the energy storage step test 2 in the simulation real-time interactive method for connecting the offshore wind farm supporting energy storage to the power grid described in the embodiment of the present application, Fig.15 This is a waveform diagram of energy storage step test 3 in the simulation real-time interactive method for connecting offshore wind farm supporting energy storage to the power grid described in the embodiment of the present application, Fig.16 This is a waveform diagram of energy storage smoothing wind power output fluctuations in the simulated real-time interactive method for connecting offshore wind farm supporting energy storage to the power grid as described in an embodiment of the present application.

[0124] In one embodiment of the present application, the simulation real-time interaction method for connecting the supporting energy storage of the offshore wind farm to the power grid includes: performing simulation test on the joint real-time simulation model; the simulation test on the joint real-time simulation model includes:

[0125] Get the test type and the test data corresponding to the test type;

[0126] According to the test type, corresponding test data is set on the joint real-time simulation model, and simulation test is performed on the joint real-time simulation model to obtain test results;

[0127] Among them, the test types include wind speed steady-state test, wind speed step test, energy storage steady-state test, energy storage power step test, energy storage tracking wind power prediction output test and frequency change test.

[0128] In the embodiment of the present application, a joint real-time simulation model is constructed through the simulation real-time interaction method of the offshore wind farm supporting energy storage access to the power grid to perform frequency change simulation test, such as Figure 5 As shown, if the test type is a frequency change test, the test data includes setting the wind speed to 15m / s, turning on the inertia response and primary frequency modulation functions, limiting the fan output from 1pu to 0.9pu, and reducing the system frequency from 50Hz to 49Hz from 60s to 65s, and increasing the system frequency from 49Hz to 50Hz from 85s to 90s. The test results obtained are that the rise time of the inertia response active power change is no more than 1s, and the deviation is no more than ±1%PN; the primary frequency modulation response lag time is no more than 2s, the primary frequency modulation rise time is no more than 9s, the primary frequency modulation adjustment time is no more than 15s, and the active power regulation allowable deviation does not exceed ±1%P, which meets the requirements of the GB / T 19963.1-2021 guidelines. Figure 6 As shown in the figure, if the test type is a frequency change test, the test data includes setting the energy storage to charge with an active power of 0.2 pu, turning on the inertia response and the primary frequency modulation function, the system frequency drops from 50 Hz to 49 Hz from 60s to 65s, and the system frequency rises from 49 Hz to 50 Hz from 85s to 90s. The test results obtained are as follows: it can be seen that the inertia response speed is fast, the inertia response exits after the frequency stops changing, the primary frequency modulation response continues to output active power, and the primary frequency modulation stops responding after the frequency returns to normal.

[0129] In the embodiment of the present application, if the test type is a wind speed steady-state test, the test data includes wind speed, current, voltage, etc. Figure 7 When the wind speed is 15m / s, the voltage and current waveforms on the 220kV side of the wind farm are as follows: Figure 8 As shown, the test results show that the fan can operate stably.

[0130] In the embodiment of the present application, if the test type is a wind speed step test, the test data includes wind speed, phase voltage, phase current, active power and reactive power, etc. When the wind speed steps from 15m / s to 8m / s, the grid-side voltage, current, active power and reactive power of a single wind turbine can be obtained. Fig. 9 The waveform shown is based on Fig. 9 The test results are as follows: as the wind speed drops to 8m / s, the peak voltage of the wind turbine grid side line is about 1650V, the output current peak is about 500A, the active power is about 0.15pu, and the reactive power is 0, and the wind turbine can operate stably. When the wind speed jumps from 15m / s to 8m / s, the voltage and current waveforms of the 220kV side of the wind farm are as follows: Fig.10 As shown, according to Fig.10 The test results from the waveform shown are: as the wind speed drops to 8m / s, the active power of the wind farm is about 0.15pu and the reactive power is 0, and the wind turbine can operate stably.

[0131] In the embodiment of the present application, if the test type is a steady-state test of energy storage, the test data includes wind speed, phase voltage, phase current, active power and reactive power, etc. When the active power of energy storage is set to 1pu, the voltage and current waveforms on the 220kV side are as follows: Fig.11 When the energy storage active power is set to -1pu, the voltage and current waveforms on the 220kV side are as follows: Fig.12 shown.

[0132] In the embodiment of the present application, if the test type is a step test of energy storage power, the test data includes wind speed, phase voltage, phase current, active power and reactive power, etc. When the active power of energy storage increases from 0 to 0.5 pu, the voltage and current waveforms on the 220 kV side are as follows: Fig.13 When the active power of the energy storage increases from 0.5pu to 1pu, the voltage and current waveforms on the 220kV side are as follows: Fig.14 When the active power of the energy storage changes from 1pu to -1pu, the voltage and current waveforms on the 220kV side are as follows: Fig.15 shown.

[0133] In the embodiment of the present application, if the test type is a test of energy storage tracking wind power forecast output, the test data includes wind speed, phase voltage, phase current, active power and reactive power, etc. Fig.16 As shown, the test results can be: According to the deviation between the dispatched power and the measured wind power, the charging and discharging power required for energy storage is calculated. It can be seen that the output power of the wind farm can track the dispatched output well and meet GB / T 19963.1-2021: The maximum limit of active power change of wind farms above 150MW in 1min is 15MW.

[0134] Embodiment 2:

[0135] Fig.17 A schematic diagram of the framework of a simulated real-time interactive device for connecting an offshore wind farm supporting energy storage to a power grid as described in an embodiment of the present application.

[0136] like Fig.17 As shown, the embodiment of the present application provides a simulation real-time interactive device for connecting an offshore wind farm supporting energy storage to a power grid, including a data acquisition module 10, a model building module 20, a model conversion module 30 and an interconnection module 40;

[0137] The data acquisition module 10 is used to obtain the topological structure diagram, operation data and operation environment of the offshore wind farm supporting energy storage access to the power grid, and obtain the power equipment data according to the topological structure diagram;

[0138] The model building module 20 is used to build an offshore wind power model using a visual simulation tool according to the topological structure diagram, operating data and power equipment data; and to build an electromechanical transient power grid model using a power system simulation software according to the topological structure diagram and the operating environment;

[0139] A model conversion module 30, used to convert the electromechanical transient power grid model to obtain a functional model;

[0140] The interconnection module 40 is used to interconnect the electromechanical transient power grid model and the offshore wind power model through the functional model to obtain a joint real-time simulation model.

[0141] It should be noted that the module content of the simulation real-time interactive device for connecting the supporting energy storage of the offshore wind farm to the power grid corresponds to the content of the steps in the method of Example 1. Example 1 has already elaborated on the step content of the simulation real-time interactive method for connecting the supporting energy storage of the offshore wind farm to the power grid. In this embodiment, the module content of the simulation real-time interactive device for connecting the supporting energy storage of the offshore wind farm to the power grid is no longer repeatedly elaborated. The simulation real-time interactive device for connecting the supporting energy storage of the offshore wind farm to the power grid realizes the construction of a joint real-time simulation model through a data acquisition module, a model construction module, a model conversion module and an interconnection module. The data interaction between the energy storage and the power grid in the connecting the supporting energy storage of the offshore wind farm to the power grid is realized through the joint real-time simulation model, which facilitates the real-time simulation of the connecting the supporting energy storage of the offshore wind farm to the power grid.

[0142] In an embodiment of the present application, the model conversion module 30 is also used to convert the electromechanical transient power grid model into an analysis and synthesis program model using a power system analysis and synthesis program, and to convert the analysis and synthesis program model into a functional model using a power system simulation software; wherein the visual simulation tool and the power system simulation software are interconnected through the functional model to interconnect the electromechanical transient power grid model and the offshore wind power model.

[0143] In an embodiment of the present application, the real-time interactive device for simulating the connection of the offshore wind farm supporting energy storage to the power grid includes a configuration module, which is used to set the configuration module on the real-time digital simulation platform of the visual simulation tool, and the configuration module is used to configure the IP address and port number, and a call file is set on the power system simulation software.

[0144] In an embodiment of the present application, the configuration module is also used to set the IP address of the mobile terminal where the visual simulation tool is located to 192.168.10.105, the remote port number to 15457, and the local port number to 15458, and correspondingly set the IP address of the mobile terminal where the power system simulation software is located to 192.168.10.200, the remote port number to 15457, and the local port number to 15458.

[0145] In an embodiment of the present application, the model building module 20 is also used to build an FPGA model based on the topology diagram and the power equipment data using a time step real-time simulation platform of a visual simulation tool, the FPGA model including an energy storage model and a wind turbine model; build a CPU model on a real-time digital simulation platform of a visual simulation tool based on the topology diagram and the operation data; obtain an offshore wind power model based on the CPU model and the FPGA model; wherein the CPU model is used to observe and issue instructions and to control the simulation of wind power plants, reactive compensation equipment and energy storage batteries in the offshore wind farm supporting energy storage access to the power grid according to the instructions.

[0146] Embodiment three:

[0147] An embodiment of the present application provides a computer-readable storage medium, which is used to store computer instructions. When the computer-readable storage medium is executed on a computer, the computer executes the above-mentioned simulation real-time interactive method for connecting supporting energy storage of an offshore wind farm to a power grid.

[0148] Embodiment 4:

[0149] Fig.18 A schematic diagram of a terminal device described in an embodiment of the present application.

[0150] like Fig.18 As shown, an embodiment of the present application provides a terminal device, including a processor and a memory;

[0151] A memory, used for storing program codes and transmitting the program codes to a processor;

[0152] The processor is used to execute the above-mentioned simulation real-time interactive method for connecting the supporting energy storage of the offshore wind farm to the power grid according to the instructions in the program code.

[0153] It should be noted that the processor is used to execute the steps in the above-mentioned embodiment of a simulation real-time interactive method for connecting an offshore wind farm supporting energy storage to a power grid according to the instructions in the program code. Alternatively, the processor implements the functions of each module / unit in the above-mentioned system / device embodiments when executing the computer program.

[0154] Exemplarily, the computer program may be divided into one or more modules / units, one or more modules / units are stored in a memory and executed by a processor to complete the present application. One or more modules / units may be a series of computer program instruction segments capable of completing a specific function, and the instruction segments are used to describe the execution process of the computer program in a terminal device.

[0155] The terminal device may be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server. The terminal device may include, but is not limited to, a processor and a memory. Those skilled in the art will appreciate that this does not constitute a limitation on the terminal device, and may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the terminal device may also include input and output devices, network access devices, buses, etc.

[0156] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (dSIC), field-programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0157] The memory may be an internal storage unit of the terminal device, such as a hard disk or memory of the terminal device. The memory may also be an external storage device of the terminal device, such as a plug-in hard disk, a smart memory card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the terminal device. Furthermore, the memory may include both an internal storage unit of the terminal device and an external storage device. The memory is used to store computer programs and other programs and data required by the terminal device. The memory may also be used to temporarily store data that has been output or is to be output.

[0158] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0159] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0160] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0161] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0162] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, etc., various media that can store program codes.

[0163] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A simulation real-time interactive method for connecting offshore wind farm supporting energy storage to the power grid, characterized in that: The following steps are involved: Obtaining a topological structure diagram, operating data and operating environment of the offshore wind farm supporting energy storage access to the power grid, and obtaining power equipment data based on the topological structure diagram; According to the topological structure diagram, the operating data and the power equipment data, a visual simulation tool is used to construct an offshore wind power model; according to the topological structure diagram and the operating environment, a power system simulation software is used to construct an electromechanical transient power grid model; Converting the electromechanical transient power grid model to obtain a functional model; The electromechanical transient power grid model and the offshore wind power model are interconnected through the functional model to obtain a joint real-time simulation model.

2. The method for simulating real-time interaction of connecting offshore wind farm supporting energy storage to the power grid according to claim 1, characterized in that: The electromechanical transient power grid model is converted to obtain a functional model including: The electromechanical transient power grid model is converted into an analysis and synthesis program model using a power system analysis and synthesis program; Use power system simulation software to convert the analytical synthesis program model into a functional model; The visual simulation tool and the power system simulation software are interconnected through the functional model, so that the electromechanical transient power grid model and the offshore wind power model are interconnected.

3. The method for simulating real-time interaction of connecting offshore wind farm supporting energy storage to the power grid according to claim 1, characterized in that: Before the electromechanical transient power grid model and the offshore wind power model are interconnected through the functional model, the simulation real-time interaction method includes: Setting a configuration module on the real-time digital simulation platform of the visual simulation tool, wherein the configuration module is used to configure an IP address and a port number; A calling file is provided on the power system simulation software.

4. The method for simulating real-time interaction of connecting offshore wind farm supporting energy storage to the power grid according to any one of claims 1 to 3, characterized in that: Using a visual simulation tool to construct an offshore wind power model according to the topological structure diagram, the operating data and the power equipment data includes: According to the topology diagram and the power equipment data, a time step real-time simulation platform of a visual simulation tool is used to construct an FPGA model, wherein the FPGA model includes an energy storage model and a wind turbine model; Building a CPU model on a real-time digital simulation platform using a visual simulation tool according to the topology diagram and the operation data; The offshore wind power model is obtained according to the CPU model and the FPGA model; The CPU model is used to observe and issue instructions, and to control the simulation of wind power plants, reactive compensation equipment and energy storage batteries in the offshore wind farm supporting energy storage access to the power grid according to the instructions.

5. The method for simulating real-time interaction of connecting offshore wind farm supporting energy storage to the power grid according to claim 4, characterized in that: Before constructing the offshore wind power model, the simulation real-time interaction method includes: establishing a wind turbine model library, an energy storage model library and an SVG model library on the time step real-time simulation platform of the visual simulation tool; the SVG model library is used to output a three-phase voltage signal according to the input of the three-phase voltage, three-phase current and control signal of the grid connection point.

6. The method for simulating real-time interaction of connecting offshore wind farm supporting energy storage to the power grid according to claim 5, characterized in that: The wind turbine model includes a wave recording management module, a model setting module, a wind turbine control module, a wind turbine input and output control module, a signal selection module, a transmission chain module, a signal transmission module and a wind turbine module; the model setting module is connected to the wind turbine control module and the signal transmission module respectively; the energy storage model library includes a model setting module and an energy storage inverter control module and a three-phase high-voltage cascade energy storage model module connected to the model setting module; The recording management module is used to set the recording mode and output the recording control signal; The model setting module is used to set the control parameters of each fan operation mode and output a control signal, and transmit the control signal to the fan control module and the signal transmission module; The fan control module is used to set the control algorithm of each fan operation mode and output each control quantity, enable signal and recording signal of each fan according to each input signal of each fan; The fan in / out control module is used to set the grid connection strategy for each fan automatic control and control the corresponding fan to automatically start and run according to the signal quantity; The signal selection module is used to automatically output the measurement data of the corresponding fan operation according to the selected fan serial number; The transmission chain module is used to extract the active power reference value, rotation speed and pitch angle of the corresponding wind turbine from the wind turbine characteristic curve of each wind turbine according to the wind speed; The signal transmission module is used to realize the communication between the CPU model and the FPGA model; The wind turbine module is used to match the wind turbine model output to the wind turbine model connected to the power grid; The model setting module is used to set the model and input the model electrical signal directly connected to the energy storage inverter control module and the three-phase high-voltage cascade energy storage module; The energy storage inverter control module is used to set the control algorithm and output the SC observation signal and the PWM control signal according to the corresponding control algorithm of the corresponding model according to the model electrical signal; The three-phase high-voltage cascade energy storage model module is used to set the operating parameters of the three-phase high-voltage cascade energy storage module and output the measurement point values ​​of the primary circuit and communicate the measurement point values ​​with the IP core in the FPGA model through the signal output module.

7. The method for simulating real-time interaction of connecting offshore wind farm supporting energy storage to the power grid according to any one of claims 1 to 3, characterized in that: include: Performing simulation test on the joint real-time simulation model; The simulation test of the joint real-time simulation model includes: Obtaining a test type and test data corresponding to the test type; According to the test type, setting is performed on the joint real-time simulation model according to the corresponding test data, and simulation testing is performed on the joint real-time simulation model to obtain a test result; Among them, the test types include wind speed steady-state test, wind speed step test, energy storage steady-state test, energy storage power step test, energy storage tracking wind power forecast output test and frequency change test.

8. A simulation real-time interactive device for connecting offshore wind farm supporting energy storage to the power grid, characterized in that: It includes a data acquisition module, a model building module, a model conversion module and an interconnection module; The data acquisition module is used to obtain the topological structure diagram, operation data and operation environment of the offshore wind farm supporting energy storage access to the power grid, and obtain power equipment data according to the topological structure diagram; The model building module is used to build an offshore wind power model using a visual simulation tool according to the topological structure diagram, the operating data and the power equipment data; and to build an electromechanical transient power grid model using a power system simulation software according to the topological structure diagram and the operating environment; The model conversion module is used to convert the electromechanical transient power grid model to obtain a functional model; The interconnection module is used to interconnect the electromechanical transient power grid model and the offshore wind power model through the functional model to obtain a joint real-time simulation model.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium is used to store computer instructions, and when it is run on a computer, it enables the computer to execute the simulation real-time interactive method for connecting offshore wind farm supporting energy storage to the power grid as described in any one of claims 1-7.

10. A terminal device, characterized in that: including a processor and a memory; The memory is used to store program codes and transmit the program codes to the processor; The processor is used to execute the simulation real-time interactive method for connecting the supporting energy storage of an offshore wind farm to the power grid according to the instructions in the program code as described in any one of claims 1 to 7.

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