Simulation Real-Time Interaction Method, Device and Equipment for Supporting Energy Storage Connected to the Grid in Offshore Wind Farms

Abstract

The present application relates to a simulation real-time interaction method, device and equipment for a supporting energy storage of an offshore wind farm to access the power grid. The method includes obtaining a topological structure diagram, operation data, operation environment and power equipment data of the supporting energy storage of the offshore wind farm to access the power grid; constructing an offshore wind power model by using a visualization simulation tool according to the topological structure diagram, operation data and power equipment data; constructing an electromechanical transient power grid model by using a power system simulation software according to the topological structure diagram and operation environment; converting the electromechanical transient power grid model to obtain a functional model; and interconnecting the electromechanical transient power grid model and the offshore wind power model through the functional model to obtain a combined real-time simulation model. The method realizes the interconnection between the electromechanical transient power grid model and the offshore wind power model through the functional model, enables the data interaction between the energy storage and the power grid in the supporting energy storage of the offshore wind farm to access the power grid, and facilitates the real-time simulation of the supporting energy storage of the offshore wind farm to access the power grid.

Description

Technical Field

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

[0002] The existing simulation power grids of new energy power stations mainly use equivalent impedance in series with an ideal voltage source for simulation, which cannot simulate actual environments such as the inertia of the power grid, and is even less able to reflect the true interaction between new energy power stations and energy storage and the power grid in a real-time simulation environment. Therefore, how to use existing resources to efficiently perform real-time electromagnetic transient modeling and simulation of an actual offshore wind farm and its supporting energy storage power station with relatively low simulation resources. Summary of the Invention

[0003] This application provides a real-time interactive simulation method, device and equipment for the access of an energy storage supporting an offshore wind farm to the power grid, which is used to solve the technical problem that the energy storage and the power grid in the existing simulation power grid of a new energy power station cannot interact, resulting in the inability to perform real-time simulation.

[0004] To achieve the above object, this application provides the following technical solutions:

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

[0006] Obtain the topological structure diagram, operation data and operation environment of the energy storage supporting the offshore wind farm accessing the power grid, and obtain power equipment data according to the topological structure diagram;

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

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

[0009] Interconnect the electromechanical transient power grid model and the offshore wind power model through the functional model to obtain a combined real-time simulation model.

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

[0011] Use the Power System Analysis Software Package (PSASP) to convert the electromechanical transient power grid model into an analysis and synthesis program model;

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

[0013] Among them, the visualization simulation tool is interconnected with the power system simulation software through the function model, so that the electromechanical transient power grid model is interconnected with the offshore wind power model.

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

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

[0016] A call file is set on the power system simulation software.

[0017] Preferably, before constructing an offshore wind power model using a visualization simulation tool based on the topological structure diagram, the operation data, and the power equipment data, the real-time simulation interaction method includes: establishing a fan model library, an energy storage model library, and an SVG model library on the time-step real-time simulation platform of the visualization simulation tool; the SVG model library is used to output three-phase voltage signals according to the input of the three-phase voltage, three-phase current, and control signals at the grid connection point.

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

[0019] The waveform recording management module is used to set the waveform recording mode and output a waveform 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 waveform recording signal of each fan according to the input signals of each fan;

[0022] The fan input / output control module is used to set the grid connection strategy for the automatic control of each fan and control the corresponding fan to start running automatically 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 number;

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

[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 access the wind turbine model of the power grid;

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

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

[0029] The three-phase high-voltage cascaded energy storage model module is used to set the operation parameters of the three-phase high-voltage cascaded energy storage model module, output the measured values of the primary circuit, and communicate the measured values with the IP core in the FPGA model through the signal output module.

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

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

[0032] Setting according to the test type on the joint real-time simulation model according to the corresponding test data, performing a simulation test on the joint real-time simulation model, and obtaining the test result;

[0033] Among them, the test type includes 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.

[0034] Preferably, the real-time interactive simulation method for the supporting energy storage of the offshore wind farm to access the power grid includes: 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 a model of an offshore wind farm by using a visualization simulation tool according to the topological structure diagram, the operation data, and the power equipment data includes:

[0036] Constructing an FPGA model by using a real-time simulation platform with a time step of a visualization simulation tool according to the topological structure diagram and the power equipment data, where the FPGA model includes an energy storage model and a wind turbine model;

[0037] Constructing a CPU model on a real-time digital simulation platform of a visualization simulation tool according to the topological structure diagram and the operation data;

[0038] Constructing and obtaining the offshore wind farm model according to the CPU model and the FPGA model;

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

[0040] On the other hand, a real-time interactive simulation device for the energy storage supporting an offshore wind farm accessing the power grid is provided, including a data acquisition module, a model construction module, a model conversion module, and an interconnection module;

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

[0042] The model construction module is used to construct an offshore wind farm model by using a visualization simulation tool according to the topological structure diagram, the operation data, and the power equipment data; construct an electromechanical transient power grid model by using a power system simulation software according to the topological structure diagram and the operation 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 farm model through the functional model to obtain a combined real-time simulation model.

[0045] Preferably, the model conversion module is further used to convert the electromechanical transient power grid model into an analysis and synthesis program model by using the power system analysis comprehensive program, and convert the analysis and synthesis program model into a functional model by using the power system simulation software; among them, the visualization simulation tool and the power system simulation software are interconnected through the functional model, so as to interconnect the electromechanical transient power grid model and the offshore wind farm model.

[0046] Preferably, the real-time interactive simulation device for the supporting energy storage of an offshore wind farm to access the power grid includes a configuration module. The configuration module is used to set up the configuration module on the real-time digital simulation platform of the visualization simulation tool. The configuration module is used to configure the IP address and port number, and a calling file is set on the power system simulation software.

[0047] Preferably, the configuration module is further used to set the IP address of the mobile terminal where the visualization simulation tool is located to 192.168.10.105, the remote port number to 15457, and the local port number 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 to 15457, and the local port number to 15458.

[0048] Preferably, the model construction module is further used to construct an FPGA model including an energy storage model and a wind turbine model in the real-time simulation platform with the time step of the visualization simulation tool according to the topological structure diagram and the power equipment data; construct a CPU model on the real-time digital simulation platform of the visualization simulation tool according to the topological structure diagram and the operation data; construct the offshore wind power model based on the CPU model and the FPGA model. Among them, the CPU model is used to observe and issue instructions and control the simulation of the wind farm, reactive power compensation equipment, and energy storage battery in the access of the supporting energy storage of the offshore wind farm to the power grid according to the instructions.

[0049] On the other hand, a computer-readable storage medium is provided. The computer-readable storage medium is used to store computer instructions. When it runs on a computer, it enables the computer to execute the above-mentioned real-time interactive simulation method for the supporting energy storage of an offshore wind farm to access the power grid.

[0050] On yet another hand, a terminal device is provided, including a processor and a memory;

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

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

[0053] The simulation real-time interaction method, device and equipment for the supporting energy storage of an offshore wind farm to access the power grid. The simulation real-time interaction method for the supporting energy storage of an offshore wind farm to access the power grid includes obtaining the topological structure diagram, operation data and operation environment of the supporting energy storage of the offshore wind farm to access the power grid, and obtaining power equipment data according to the topological structure diagram; constructing an offshore wind power model by using a visualization simulation tool according to the topological structure diagram, operation data and power equipment data; constructing an electromechanical transient power grid model by using a power system simulation software according to the topological structure diagram and operation environment; converting the electromechanical transient power grid model to obtain a functional model; and interconnecting the electromechanical transient power grid model and the offshore wind power model through the functional model to obtain a combined real-time simulation model.

[0054] From the above technical solutions, it can be seen that the present application has the following advantages: The simulation real-time interaction method for the supporting energy storage of an offshore wind farm to access the power grid realizes the interconnection of the electromechanical transient power grid model and the offshore wind power model through the functional model, enabling the data interaction between the energy storage and the power grid in the supporting energy storage of the offshore wind farm to access the power grid, facilitating the real-time simulation of the supporting energy storage of the offshore wind farm to access the power grid, and solving the technical problem that there is no interaction between the energy storage and the power grid in the simulation power grid of the existing new energy power station, resulting in the inability to perform real-time simulation.

[0055] The simulation real-time interaction device for the supporting energy storage of an offshore wind farm to access the power grid realizes the construction of a combined real-time simulation model through a data acquisition module, a model construction module, a model conversion module and an interconnection module, and realizes the data interaction between the energy storage and the power grid in the supporting energy storage of the offshore wind farm to access the power grid through the combined real-time simulation model, facilitating the real-time simulation of the supporting energy storage of the offshore wind farm to access the power grid. Brief Description of the Drawings

[0056] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0057] Figure 1 It is the flowchart of the steps of the simulation real-time interaction method for the supporting energy storage of an offshore wind farm to access the power grid described in the embodiments of the present application;

[0058] Figure 2 It is the grid location information diagram of the electromechanical transient power grid model composed of BPA data in the simulation real-time interaction method for the supporting energy storage of an offshore wind farm to access the power grid described in the embodiments of the present application;

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

[0060] Figure 4 CPU model diagram of the offshore wind power model in the real-time interactive simulation method for the integration of energy storage supporting an offshore wind farm into the power grid described in the embodiments of the present application;

[0061] Figure 5 Test diagram of the inertia response and primary frequency regulation of the wind turbines in the wind farm in the real-time interactive simulation method for the integration of energy storage supporting an offshore wind farm into the power grid described in the embodiments of the present application;

[0062] Figure 6 Test diagram of the inertia response and primary frequency regulation of the energy storage in the real-time interactive simulation method for the integration of energy storage supporting an offshore wind farm into the power grid described in the embodiments of the present application;

[0063] Figure 7 Test diagram of the output of the wind turbine at the rated wind speed in the real-time interactive simulation method for the integration of energy storage supporting an offshore wind farm into the power grid described in the embodiments of the present application;

[0064] Figure 8 Test diagram of the output of the wind turbine at the rated wind speed in the real-time interactive simulation method for the integration of energy storage supporting an offshore wind farm into the power grid described in the embodiments of the present application;

[0065] Figure 9 Test diagram of the wind speed step in the real-time interactive simulation method for the integration of energy storage supporting an offshore wind farm into the power grid described in the embodiments of the present application;

[0066] Figure 10 Another test diagram of the wind speed step in the real-time interactive simulation method for the integration of energy storage supporting an offshore wind farm into the power grid described in the embodiments of the present application;

[0067] Figure 11 Waveform diagram of the active power of 1 pu of the energy storage in the real-time interactive simulation method for the integration of energy storage supporting an offshore wind farm into the power grid described in the embodiments of the present application;

[0068] Figure 12 Waveform diagram of the active power of -1 pu of the energy storage in the real-time interactive simulation method for the integration of energy storage supporting an offshore wind farm into the power grid described in the embodiments of the present application;

[0069] Figure 13 Waveform diagram of the first energy storage step test in the real-time interactive simulation method for the integration of energy storage supporting an offshore wind farm into the power grid described in the embodiments of the present application;

[0070] Figure 14 Waveform diagram of the second energy storage step test in the real-time interactive simulation method for the integration of energy storage supporting an offshore wind farm into the power grid described in the embodiments of the present application;

[0071] Figure 15It is the waveform diagram of the third energy storage step test in the simulation real-time interaction method for the supporting energy storage of an offshore wind farm to access the power grid according to the embodiments of the present application;

[0072] Figure 16 It is the waveform of the energy storage suppressing the output power fluctuation of the wind power in the simulation real-time interaction method for the supporting energy storage of an offshore wind farm to access the power grid according to the embodiments of the present application;

[0073] Figure 17 It is the frame schematic diagram of the simulation real-time interaction device for the supporting energy storage of an offshore wind farm to access the power grid according to the embodiments of the present application;

[0074] Figure 18 It is the schematic diagram of the terminal device according to the embodiments of the present application. Detailed implementation manners

[0075] To make the invention purpose, features, and advantages of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the embodiments described below are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0076] In the description of the embodiments of the present application, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present application, "a plurality of" means 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", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components. 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 specific circumstances.

[0078] At present, the installed capacity of new energy power generation such as wind power, photovoltaic power, and energy storage in the power grid is increasing continuously. There is an urgent practical need for grid-connected simulation tests and analyses of new energy power stations and the energy storage systems supporting new energy power stations. New energy grid-connected simulation is not limited by on-site test conditions and can test the characteristics of new energy power stations to the greatest extent. Standards such as the "Technical Regulations for Wind Farms Connected to the Power System - Part 1: Onshore Wind Power" (GB / T 19963.1-2021) and the "Technical Specification for Grid-Source Coordination in Power Systems" (DL / T 1870-2018) clearly require new energy power stations to provide "electromagnetic transient and electromechanical transient simulation models" for the electromechanical transient and electromagnetic transient simulation calculation models and parameters of new energy generating units, the collector system of new energy power stations, the reactive power compensation devices of new energy power stations, and the substation-level control systems in power system simulation calculations, which are used for the planning, design, dispatching, and operation of new energy power stations connected to the power system. Taking wind farms as an example within the power grid, the relevant modeling standards include the "Regulations for Electrical Simulation Modeling and Verification of Wind Farms" and the "Regulations for Modeling and Verification of the Impedance Frequency Characteristics of Wind Turbines".

[0079] Currently, modeling is actively expanding its business scope 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 for wind farms include: first, the power quality assessment of wind farms; second, the modeling and verification of the electrical simulation models of wind farms; third, the electrical simulation modeling of the SVG reactive power compensation devices of wind farms; fourth, the verification of the high- and low-voltage ride-through capabilities of wind farms; fifth, the verification of the high- and low-voltage ride-through capabilities of the reactive power compensation devices of wind farms; and sixth, the verification of the grid adaptability of wind farms. Currently, the verification of the high- and low-voltage ride-through capabilities of single wind turbines and dynamic reactive power compensation devices is achieved through RT-LAB real-time simulation hardware-in-the-loop tests. The substation-level modeling of wind farms is based on the actual topology and parameters of sea wind farms, and uses electromechanical-electromagnetic hybrid simulation software for off-line electromechanical transient modeling on a scale of 1 to 10 ms, which can only reflect the positive sequence components; the simulation business for energy storage has not been carried out yet.

[0080] Patent terms:

[0081] The PSD-BPA model is mainly used for power system power flow analysis and transient stability calculation, and is suitable for the 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-signal stability analysis, voltage and frequency stability analysis, and power quality analysis, etc.

[0083] The Power System Analysis Software Package is abbreviated as PSASP. The Power System Analysis Software Package is a set of power system analysis programs with a long history, powerful functions, and convenient use. It is a large software package with resource sharing, convenient use, high integration, and openness.

[0084] The real-time digital simulation platform is a software platform used for developing, validating, and verifying 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 the power grid, mainly for dynamically regulating 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 IGBTs) to detect the changes in the 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 and the transmission of active power is maximized.

[0086] The signal output module is formed by cascading multiple half-brick power modules (such as CHB modules).

[0087] The embodiments of the present application provide a simulation real-time interaction method, device, and equipment for a supporting energy storage of an offshore wind farm to access the power grid, solving the technical problem that the energy storage in the simulation power grid of existing new energy power stations cannot interact with the power grid, resulting in the inability to perform real-time simulation.

[0088] Embodiment 1:

[0089] Figure 1 It is a flowchart of the steps of the simulation real-time interaction method for a supporting energy storage of an offshore wind farm to access the power grid according to the embodiments of the present application.

[0090] As Figure 1 shown, the embodiments of the present application provide a simulation real-time interaction method for a supporting energy storage of an offshore wind farm to access the power grid, including the following steps:

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

[0092] It should be noted that in step S1, the data required for constructing the simulation model of the supporting energy storage of the offshore wind farm connected to the power grid includes the topological structure diagram, operation data, operation environment, and power equipment data. In this embodiment, the operation data includes the electrical quantity parameters and operation modes of each power equipment. The power equipment data includes three-phase submarine cables, multiple static var generators (SVG), multiple three-winding transformers, several fan collector cable lines, three-phase shunt reactors, multiple wind turbines, and multiple step-up transformers, etc. Among them, the electrical quantity parameters include rated power, rated voltage, rated current, capacitance, resistance, transformation ratio, etc. The operation modes include the on-load tap-changing mode of the transformer, the non-on-load tap-changing mode of the fan, etc. The operation environment includes the positive sequence of the maximum mode, the zero sequence of the maximum mode, the positive sequence of the minimum mode, the zero sequence of the minimum mode, and the equipment operation software environment of the bus system. The topological structure diagram formed based on BPA data.

[0093] S2. Construct an offshore wind power model using a visualization simulation tool according to the topological structure diagram, operation data, and power equipment data; construct an electromechanical transient power grid model using a power system simulation software according to the topological structure diagram and operation environment.

[0094] It should be noted that in step S2, the data obtained in step S1 is used to construct an offshore wind power model and an electromechanical transient power grid model using different simulation tools to provide data for the follow-up. In this embodiment, for the supporting energy storage of the offshore wind farm connected to the power grid, due to the different operation environments of the offshore wind farm and the onshore power grid, the corresponding simulation models cannot be constructed on one simulation platform. Therefore, it is necessary to construct an offshore wind power model using a visualization simulation tool according to the topological structure diagram, operation data, and power equipment data; construct an electromechanical transient power grid model using a power system simulation software according to the topological structure diagram and operation 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 visualization simulation tool. In this embodiment, the real-time interactive method for the simulation of the supporting energy storage of the offshore wind farm connected to the power grid first realizes the interconnection of the two different simulation platforms of the visualization simulation tool and the power system simulation software through UDP / IP, and then the functional model realizes the interconnection between the electromechanical transient power grid model and the offshore wind power model. Among them, the visualization simulation tool and the power system simulation software are interconnected through UDP / IP.

[0097] S4. 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.

[0098] It should be noted that in step S4, the functional model obtained according to step S3 is used to interconnect the two models of the electromechanical transient power grid model and the offshore wind power model constructed in step S2, so as to obtain a joint real-time simulation model. Through the joint real-time simulation model, data interaction between the energy storage and the power grid when the offshore wind farm supporting energy storage is connected to the power grid is realized, which facilitates the real-time simulation of the offshore wind farm supporting energy storage connected to the power grid. In this embodiment, the constructed joint real-time simulation model can be used to support the inertia response and primary frequency regulation grid connection assessment of new energy supporting energy storage stations based on simulation.

[0099] A real-time interactive simulation method for an offshore wind farm supporting energy storage connected to the power grid provided by the present application includes obtaining the topological structure diagram, operation data, and operation environment of the offshore wind farm supporting energy storage connected to the power grid, and 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, operation data, and power equipment data; constructing an electromechanical transient power grid model using a power system simulation software according to the topological structure diagram and operation environment; converting the electromechanical transient power grid model to obtain a functional model; and interconnecting the electromechanical transient power grid model and the offshore wind power model through the functional model to obtain a joint real-time simulation model. The real-time interactive simulation method for the offshore wind farm supporting energy storage 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, enabling data interaction between the energy storage and the power grid when the offshore wind farm supporting energy storage is connected to the power grid, which facilitates the real-time simulation of the offshore wind farm supporting energy storage connected to the power grid; and solves the technical problem that there is no interaction between the energy storage and the power grid in the existing new energy power station simulation power grid, resulting in the inability to perform real-time simulation.

[0100] Figure 2 This is the grid location information diagram of the electromechanical transient power grid model composed of BPA data in the real-time interactive simulation method for an offshore wind farm supporting energy storage connected to the power grid according to the embodiment of the present application. Figure 3 For Figure 2 The corresponding grid location information diagram converted into a functional model.

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

[0102] Converting the electromechanical transient power grid model into an analysis and synthesis program model using the power system analysis and synthesis program;

[0103] Converting the analysis and synthesis program model into a functional model using a power system simulation software;

[0104] Among them, the visual simulation tool and the power system simulation software are interconnected through the functional model, so as 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, first, a power system simulation software is used to construct an electromechanical transient power grid model based on the topological structure diagram and operating environment with BAP data, as Figure 2 shown. After that, the electromechanical transient power grid model with BAP data is first converted to 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 visualization simulation tool, as Figure 3 shown, to complete the model construction based on the power system simulation software. The real-time interactive simulation method for the energy storage connected to the power grid in the offshore wind farm can meet the requirement of no less than 200 power 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 the PSASP program and then from the PSASP to the power system simulation software program to obtain the functional model, and then the joint real-time simulation model is used for simulation to obtain the power grid structure and parameters identical to the original data in BPA, which can perform power flow calculation and real-time simulation calculation, verifying that the interconnection between the electromechanical transient power grid model and the offshore wind power model through the functional model to construct the joint real-time simulation model can achieve the integrated real-time simulation of the energy storage and the power grid.

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

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

[0108] Setting a call file on the power system simulation software;

[0109] Among them, the IP address of the mobile terminal where the visualization 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 constructing the joint real-time simulation model, first set up the configuration module on the real-time digital simulation platform of the visualization simulation tool. The configuration module can be understood as constructing a UDP communication model library. Add the 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, port number, etc. The OpAsyncSend module is used to send signals, and the receive message module is used to receive signals. It is also necessary to set up a calling file 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 is set up in the visualization simulation tool, it is necessary to add UDP communication-related files, namely AsyncIP.c, AsyncIP.mk, and AsyncIPUtils.h, to the file of the real-time digital simulation platform of the visualization simulation tool. Attention should be paid to the setting of the IP address and port number. For example, when configuring the "OpIPSocketCtrl module", the IP address of the real-time digital simulation platform of the visualization simulation tool needs to be changed to 192.168.10.105, the IP address of the computer 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 the CPU model diagram of the offshore wind power model in the real-time interaction method for simulating the connection of energy storage supporting an offshore wind farm to the power grid according to the embodiment of the present application.

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

[0113] Construct an FPGA model using the time-step real-time simulation platform of the visualization simulation tool according to the topological structure diagram and power equipment data. The FPGA model includes an energy storage model and a wind turbine model;

[0114] Construct a CPU model on the real-time digital simulation platform of the visualization simulation tool according to the topological structure diagram and operation data;

[0115] Construct and obtain the offshore wind power model according to the CPU model and the FPGA model;

[0116] Among them, the CPU model is used to observe and issue instructions, and control the simulation of the wind farm, reactive power compensation equipment, and energy storage battery in the supporting energy storage of the offshore wind farm connected to the power grid according to the instructions, so as to achieve the functions of tracking the power grid dispatching instructions, smoothing the wind power output, inertia response, and primary frequency modulation.

[0117] It should be noted that according to the topological structure diagram and power equipment data, it is 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 an FPGA model. The CPU model is built on the real-time digital simulation platform of the visual simulation tool according to the topological structure 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. As Figure 4 shown, SC_Console is the interface for observing and issuing instructions, and the CPU model includes an oscilloscope and a module for issuing instructions; SS_WT_Control is the control of the wind farm, SS_SVG_Control is the control of SVG, and SS_CHB_Control is the control of the energy storage battery; it has the functions of tracking the power grid dispatching instructions, smoothing the wind power output, inertia response, and primary frequency modulation. SM is the main circuit model, which is built according to the actual power grid. For example: every 18 wind turbines are grouped together and connected to the power grid through 2 collector lines. The actual wind speed is generated and injected into each wind turbine. The energy storage performs power compensation according to the error between the power dispatched by the dispatcher and the actual power. The CPU model is a dynamic link library model provided by the manufacturer.

[0118] In the embodiment of the present application, before constructing the offshore wind power model, the real-time interactive simulation method for the supporting energy storage of the offshore wind farm connected to the power grid 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.

[0119] It should be noted that the fan model library includes a waveform recording management module, a model setting module, a fan control module, a fan input / output control module, a signal selection module, a drive chain module, a signal transmission module, and a fan module. The model setting module is respectively connected to the fan control module and the signal transmission module. In this embodiment, the waveform recording management module is used to set the waveform recording mode and output a waveform 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 waveform recording signal of each fan according to the signals of each item of each fan input. The fan input / output control module is used to set the grid connection strategy for the automatic control of each fan and control the corresponding fan to start running automatically 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 number. The drive chain module is used to extract the active power reference value, speed, and pitch angle of the corresponding fan from the fan characteristic curve of each fan 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 to access the fan model of the power grid (only including the communication module between the fan and the signal transmission module and a current source for injecting current into the power grid).

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

[0121] It should be noted that the model setting module is used to set the model and input the model electrical signals directly connected to the energy storage inverter control module and the three-phase high-voltage cascaded energy storage model module. The energy storage inverter control module is used to set the control algorithm and operate the corresponding model according to the model electrical signal according to the corresponding control algorithm to output the SC observation signal and the PWM control signal; the three-phase high-voltage cascaded energy storage model module is used to set the operation parameters of the three-phase high-voltage cascaded energy storage model module and output the measured values of the primary circuit (voltage and current signals), and communicate the measured values with the IP core in the FPGA model through the signal output module.

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

[0123] Figure 5 It is a test diagram of the fan inertia response and primary frequency modulation of the wind farm in the real-time interactive simulation method for the offshore wind farm supporting energy storage to access the power grid described in the embodiment of the present application. Figure 6The inertia response and primary frequency regulation test chart of the energy storage for the real-time interactive simulation method of the offshore wind farm supporting energy storage connected to the power grid described in the embodiments of this application Figure 7 The rated wind speed fan output test chart in the real-time interactive simulation method of the offshore wind farm supporting energy storage connected to the power grid described in the embodiments of this application Figure 8 The rated wind speed fan output test chart in the real-time interactive simulation method of the offshore wind farm supporting energy storage connected to the power grid described in the embodiments of this application Figure 9 The wind speed step test chart in the real-time interactive simulation method of the offshore wind farm supporting energy storage connected to the power grid described in the embodiments of this application Figure 10 Another wind speed step test chart in the real-time interactive simulation method of the offshore wind farm supporting energy storage connected to the power grid described in the embodiments of this application Figure 11 The waveform chart of the energy storage active power of 1 pu in the real-time interactive simulation method of the offshore wind farm supporting energy storage connected to the power grid described in the embodiments of this application Figure 12 The waveform chart of the energy storage active power of -1 pu in the real-time interactive simulation method of the offshore wind farm supporting energy storage connected to the power grid described in the embodiments of this application Figure 13 The waveform chart of the first energy storage step test in the real-time interactive simulation method of the offshore wind farm supporting energy storage connected to the power grid described in the embodiments of this application Figure 14 The waveform chart of the second energy storage step test in the real-time interactive simulation method of the offshore wind farm supporting energy storage connected to the power grid described in the embodiments of this application Figure 15 The waveform chart of the third energy storage step test in the real-time interactive simulation method of the offshore wind farm supporting energy storage connected to the power grid described in the embodiments of this application Figure 16 The waveform chart of the energy storage suppressing the fluctuation of wind power output in the real-time interactive simulation method of the offshore wind farm supporting energy storage connected to the power grid described in the embodiments of this application

[0124] In an embodiment of this application, the real-time interactive simulation method of the offshore wind farm supporting energy storage connected to the power grid includes: performing a simulation test on the joint real-time simulation model; performing a simulation test on the joint real-time simulation model includes:

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

[0126] Setting according to the test type on the joint real-time simulation model according to the corresponding test data, performing a simulation test on the joint real-time simulation model, and obtaining a test result;

[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 embodiments of the present application, a combined real-time simulation model is constructed through the real-time interactive simulation method for the grid connection of the energy storage supporting the offshore wind farm to conduct frequency change simulation tests. For example, Figure 5 As shown, if the test type is a frequency change test, the test data includes setting the wind speed to 15 m / s. After enabling the inertia response and primary frequency regulation functions, the output of the wind turbine is restricted and reduced from 1 pu to 0.9 pu. From 60 s to 65 s, the system frequency drops from 50 Hz to 49 Hz, and from 85 s to 90 s, the system frequency rises from 49 Hz to 50 Hz. The obtained test results show that the rise time of the change in active power of the inertia response is no greater than 1 s, and the deviation is no greater than ±1%PN; the lag time of the primary frequency regulation response is no greater than 2 s, the rise time of the primary frequency regulation is no greater than 9 s, the regulation time of the primary frequency regulation is no greater than 15 s, and the allowable deviation of the active power regulation does not exceed ±1%P, meeting the requirements of the GB / T 19963.1-2021 guideline. For example, Figure 6 As shown, 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. After enabling the inertia response and primary frequency regulation functions, from 60 s to 65 s, the system frequency drops from 50 Hz to 49 Hz, and from 85 s to 90 s, the system frequency rises from 49 Hz to 50 Hz. The obtained test results show that the inertia response speed is relatively fast. After the frequency stops changing, the inertia response exits, and the primary frequency regulation response continuously outputs active power. After the frequency returns to normal, the primary frequency regulation stops responding.

[0129] In the embodiments of the present application, if the test type is a wind speed steady-state test, the test data includes wind speed, current, voltage, etc. For example, Figure 7 As shown; when the wind speed is 15 m / s, the voltage and current waveforms on the 220 kV side of the wind farm are as shown in Figure 8 As shown, the obtained test result is that the wind turbines can operate stably.

[0130] In the embodiments 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 15 m / s to 8 m / s, the waveforms of the grid-side voltage, current, active power, and reactive power of a single wind turbine can be obtained as shown in Figure 9 As shown. According to the waveforms shown in Figure 9 As shown, the test results can be obtained as follows: After the wind speed drops to 8 m / s, the peak value of the line voltage on the grid side of the wind turbine is about 1650 V, the peak value of the output current is about 500 A, the active power is about 0.15 pu, and the reactive power is 0. The wind turbines can operate stably. When the wind speed steps from 15 m / s to 8 m / s, the voltage and current waveforms on the 220 kV side of the wind farm are as shown in Figure 10 As shown. According to the waveforms shown in Figure 10 As shown, the test results can be obtained as follows: After the wind speed drops to 8 m / s, the active power of the wind farm is about 0.15 pu and the reactive power is 0. The wind turbines can operate stably.

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

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

[0133] In the embodiment of the present application, if the test type is energy storage tracking wind power predicted output test, the test data includes wind speed, phase voltage, phase current, active power, reactive power, etc. As shown in Figure 16 shown, the test result can be: according to the deviation between the power dispatched and the measured wind power, the charge and discharge power required by the energy storage can be calculated. It can be seen that the output power of the wind farm can better track the dispatched output and meet the maximum limit of 15 MW for the 1-minute active power change of wind farms above 150 MW in GB / T 19963.1-2021.

[0134] Embodiment 2:

[0135] Figure 17 It is a framework schematic diagram of a simulation real-time interaction device for a supporting energy storage of an offshore wind farm connected to the power grid in the embodiment of the present application.

[0136] As shown in Figure 17 shown, the embodiment of the present application provides a simulation real-time interaction device for a supporting energy storage of an offshore wind farm connected to the power grid, including a data acquisition module 10, a model construction module 20, a model conversion module 30, and an interconnection module 40;

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

[0138] The model construction module 20 is used to construct an offshore wind power model by using a visualization simulation tool according to the topological structure diagram, operation data, and power equipment data; and construct an electromechanical transient power grid model by using a power system simulation software according to the topological structure diagram and operation environment.

[0139] The model conversion module 30 is 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 real-time interactive device for simulating the access of the supporting energy storage of the offshore wind farm to the power grid corresponds to the content of the steps in the method of Embodiment 1. Embodiment 1 has elaborated in detail the content of the steps of the real-time interactive method for simulating the access of the supporting energy storage of the offshore wind farm to the power grid, and the module content of the real-time interactive device for simulating the access of the supporting energy storage of the offshore wind farm to the power grid will not be repeated in this embodiment. The real-time interactive device for simulating the access of the supporting energy storage of the offshore wind farm to the power grid realizes the construction of a joint real-time simulation model through the data acquisition module, the model construction module, the model conversion module, and the interconnection module, and realizes the interaction of data between the energy storage and the power grid in the access of the supporting energy storage of the offshore wind farm to the power grid through the joint real-time simulation model, which is convenient for the real-time simulation of the access of the supporting energy storage of the offshore wind farm to the power grid.

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

[0143] In the embodiment of the present application, the real-time interactive device for simulating the access of the supporting energy storage of the offshore wind farm to the power grid includes a configuration module. The configuration module is used to set the configuration module on the real-time digital simulation platform of the visualization simulation tool. 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 the embodiment of the present application, the configuration module is further used to set the IP address of the mobile terminal where the visualization simulation tool is located to 192.168.10.105, the remote port number to 15457, and the local port number 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 to 15457, and the local port number to 15458.

[0145] In the embodiment of the present application, the model construction module 20 is further configured to construct an FPGA model for a real-time simulation platform according to the topological structure diagram and power equipment data by using the time step of a visualization simulation tool. The FPGA model includes an energy storage model and a wind turbine model; construct a CPU model on a real-time digital simulation platform according to the topological structure diagram and operation data by using the visualization simulation tool; construct a marine wind power model based on the CPU model and the FPGA model; wherein, the CPU model is used to observe and issue instructions and control the simulation of the energy storage supporting the marine wind farm accessing the power grid, the reactive power compensation device, and the energy storage battery according to the instructions.

[0146] Embodiment 3:

[0147] The embodiment of the present application provides a computer-readable storage medium, which is used to store computer instructions. When the computer instructions run on a computer, the computer is enabled to execute the above-mentioned real-time interaction method for simulating the access of the energy storage supporting the marine wind farm to the power grid.

[0148] Embodiment 4:

[0149] Figure 18 It is a schematic diagram of the terminal device described in the embodiment of the present application.

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

[0151] The memory is used to store program codes and transmit the program codes to the processor;

[0152] The processor is used to execute the above-mentioned real-time interaction method for simulating the access of the energy storage supporting the marine wind farm to the power grid according to the instructions in the program codes.

[0153] It should be noted that the processor is used to execute the steps in the above-mentioned embodiment of a real-time interaction method for simulating the access of the energy storage supporting the marine wind farm to the power grid according to the instructions in the program codes. Alternatively, when the processor executes a computer program, it realizes the functions of each module / unit in the above-mentioned system / device embodiments.

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

[0155] The terminal device can be a computing device such as a desktop computer, a notebook, a palm computer, and a cloud server. The terminal device may include, but is not limited to, a processor and a memory. Those skilled in the art can understand that this does not constitute a limitation on the terminal device, and it may include more or fewer components than shown in the figure, or combine certain components, or different components. For example, the terminal device may further include input / output devices, network access devices, a bus, etc.

[0156] The so-called processor may be a central processing unit (CPU), or may also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (dSICs), off-the-shelf programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor, or the processor may also be any conventional processor, etc.

[0157] The memory may be an internal storage unit of the terminal device, such as the 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 media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the terminal device. Further, the memory may also include both the internal storage unit and the external storage device of the terminal 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 will be output.

[0158] Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the above-described systems, devices, and units can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0159] In several embodiments provided in this 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 merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other may be through some interfaces, and the indirect couplings or communication connections of the devices or units may be in electrical, mechanical, or other forms.

[0160] The unit described as a separation component may or may not be physically separated. The component shown as a unit may or may not be a physical unit, that is, it may be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0161] In addition, each functional unit in various embodiments of the present application can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0162] If the above-mentioned 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 such an understanding, the technical solution of the present application, in essence, 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. This computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present application. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs 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 foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of various 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; 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; Wherein, 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; 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.

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: Before interconnecting the electromechanical transient power grid model and the offshore wind power model 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.

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 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, the simulation real-time interactive method 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 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.

4. The method for simulating real-time interaction of connecting offshore wind farm supporting energy storage to the power grid according to claim 3 is 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 a model electrical signal directly connected to the energy storage inverter control module and the three-phase high-voltage cascade energy storage model 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 model module and output the measurement point value of the primary circuit and communicate the measurement point value with the IP core in the FPGA model through the signal output module.

5. 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: 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.

6. 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; 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.

7. 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 1-5.

8. 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 5.

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