A new energy and energy storage power station power control simulation test platform and method

Abstract

The application provides a new energy and energy storage power station power control simulation test platform and method, comprising: a multi-level cooperative control unit for communication between multiple levels through a multi-machine communication unit, and generating corresponding power control instructions according to the current power control performance test requirements; a network source situation real-time simulation unit runs a plurality of simulation models based on the power control instructions, and performs power control performance tests on each simulation model to obtain analog small signals, which are then converted into secondary voltage and current through a secondary measurement unit; based on the secondary voltage and current, an online monitoring unit is used to process and calculate the grid-connected point and the operating state of each unit in the new energy and energy storage power station model, and the power data and control data of the new energy and energy storage power station within a set time period are processed and calculated as the power control performance test results; the application can perform power control performance tests on new energy and energy storage power stations in a real environment.

Description

Technical Field

[0001] This invention belongs to the field of new energy power generation technology, specifically relating to a power control simulation test platform and method for new energy and energy storage power stations. Background Technology

[0002] The power control link in new energy and energy storage power stations encompasses secondary measurement, multi-level collaborative control, and communication. The multi-level collaborative control involves station control, collaborative control, and individual unit control. Existing hardware-in-the-loop testing methods for new energy and energy storage converter control are mostly geared towards individual unit performance testing, only connecting to individual controllers, making it difficult to conduct power control performance testing at the power station level for new energy and energy storage.

[0003] Therefore, how to conduct power control performance testing at the power station level for new energy and energy storage plants to ensure their power supply capacity and the safe and stable operation of the power grid is an important issue that urgently needs to be addressed. Summary of the Invention

[0004] To address the problem of the inability to conduct power control performance tests at the power station level for new energy and energy storage power plants, this invention proposes a power control simulation test platform for new energy and energy storage power plants, comprising: a real-time grid-source status simulation unit, a secondary measurement unit, a multi-level collaborative control unit, a multi-machine communication unit, and an online monitoring unit; The network source situation real-time simulation unit is built in a real-time simulator. The signal output terminal of the network source situation real-time simulation unit is electrically connected to the feedback signal input terminal of the multi-level collaborative control unit and the electrical signal input terminal of the online monitoring unit via the secondary measurement unit. The control terminal of the network source situation real-time simulation unit is electrically connected to the control terminal of the multi-level collaborative control unit. The signal output terminal of the multi-level collaborative control unit is communicatively connected to the signal input terminal of the multi-machine communication unit. The signal output terminal of the multi-machine communication unit is communicatively connected to the signal input terminal of the multi-level collaborative control unit and the communication signal input terminal of the online monitoring unit. The multi-level collaborative control unit is used to communicate between multiple levels via the multi-machine communication unit, and to generate corresponding power control commands according to the current power control performance test requirements, so as to control the network source status real-time simulation unit. The real-time simulation unit for grid-source situation includes several simulation models. Each simulation model is used to perform simulation operation based on the power control command, and to test the power control performance of each simulation model to obtain analog small signals. The simulation models include: a source-storage model and a grid model. The secondary measurement unit is used to convert the analog small signal into secondary voltage and current using a power amplifier; The online monitoring unit is used to process and calculate the grid connection point and the operating status of each unit in the source-storage model based on the secondary voltage and current of the secondary measurement unit; based on the grid connection point and the operating status of each unit, it processes and calculates the power data and control data of the new energy and energy storage power station within a set time period to obtain the power control performance test results of the source-storage model.

[0005] Preferably, the power control command includes one of the following: active power control command, reactive power control command, non-extreme operating condition power control command, and extreme operating condition power control command.

[0006] Preferably, the multi-level collaborative control unit includes: a station control layer, a collaborative control layer, and a single-machine layer connected in sequence; The station control layer is used to generate active power control commands or reactive power control commands when it is determined that the power control command will be generated by the station control layer based on the current power control performance test requirements. The co-control layer is used to generate non-extreme operating condition power control commands or extreme operating condition power control commands when it is determined that the power control command is generated by the co-control layer according to the current power control performance test requirements. The single-machine layer is used to perform active power control or reactive voltage control on the source-storage model based on active power control commands or reactive power control commands; or to perform primary frequency regulation control on the source-storage model under non-limiting state of charge (SOC) conditions or under limiting SOC conditions based on non-limiting or limiting power control commands.

[0007] Preferably, the source-storage model includes: a power loop model of a power electronic device; The power circuit model of the power electronic equipment is set in the real-time simulator to simulate the DC side of the new energy power station model using the controlled DC source model and the output simulation curves of wind power and photovoltaic power, and to simulate the AC side of the new energy power station model using the inverter circuit model.

[0008] Preferably, the single-machine layer is specifically used to determine the type of the inverter circuit model based on the access method of the power loop model of the power electronic device accessed by the single-machine layer and the power topology of the power loop model of the power electronic device, and to send corresponding type of power control command to the source-storage model for control. The type includes switching model level and average value model level. The power circuit model of the power electronic equipment is specifically used to simulate the AC side of the new energy power station model by using an inverter circuit at the switching model level when the power control command received by the access method is a switching pulse signal; and to simulate the AC side of the new energy power station model by using an inverter circuit at the average value model level when the power control command received by the access method is a reference value signal. The power topology of the inverter circuit model includes at least one of the following: a three-phase full bridge at the switching model level, a three-phase full bridge in parallel at the switching model level, a T-type three-level at the switching model level, an I-type three-level at the switching model level, an I-type three-level at the switching model level with a boost circuit, a three-phase full bridge at the average value model level, a three-phase full bridge in parallel at the average value model level, a T-type three-level at the average value model level, an I-type three-level at the average value model level, and an I-type three-level at the average value model level with a boost circuit.

[0009] Preferably, the power grid model includes: a virtual impedance model and an ideal voltage source model connected thereto; The virtual impedance model is used to adjust the voltage amplitude of the ideal voltage source model at the current moment based on the active and reactive power of the grid connection point of the new energy and energy storage power station in the source-storage model at the previous moment, and the voltage amplitude of the ideal voltage source model at the previous moment, so as to conduct power control performance testing under voltage amplitude disturbance. The voltage amplitude model includes the following calculation methods:

[0010] in, U ( t )express t Voltage amplitude at any given moment; U ( t -1) indicates t Voltage amplitude at time -1; P pcc ( t -1) Q pcc ( t -1) respectively represent t Active and reactive power at the grid connection point of new energy and energy storage power stations at time -1 K This is the ratio of the grid reactance to the resistance. SCR Represents the short-circuit ratio of the power grid. P n , U n These are the rated power and rated voltage of new energy and energy storage power stations, respectively.

[0011] Preferably, the grid connection point and the operating status of each generating unit include: the voltage, current, frequency, active power and reactive power of the grid connection point, as well as the unit start-up status, telemetry and remote adjustment command information of each generating unit.

[0012] Based on the same inventive concept, this invention also provides a simulation test method for power control of new energy and energy storage power stations, comprising the following steps: Based on the current power control performance testing requirements, the platform generates corresponding power control commands through its multi-level collaborative control unit; wherein, the multi-level collaborative control unit communicates between multiple levels via a multi-machine communication unit; Several simulation models are generated through the real-time network-source situation simulation unit of the platform. Based on the power control command, each simulation model is instructed to run the simulation and the power control performance of each simulation model is tested to obtain analog small signals. The simulation models include: source-storage model and grid model. The analog signal is converted into secondary voltage and current by the secondary measurement unit of the platform. Based on the secondary voltage and current, the online monitoring unit of the platform processes and calculates the grid connection point and the operating status of each unit in the source-storage model; based on the grid connection point and the operating status of each unit, the online monitoring unit processes and calculates the power data and control data of the new energy and energy storage power stations within a set time period to obtain the power control performance test results of the source-storage model.

[0013] Preferably, the step of generating corresponding power control commands through the multi-level collaborative control unit of the platform based on the current power control performance testing requirements includes the following steps: The current power control performance test requirement is to test the active power control capability. If the test is conducted on a new energy power station, the initial value of the wind and solar power output curve of the new energy power station is set, and the active power control command of the new energy power station is generated through the station control layer of the multi-level collaborative control unit. If the test is conducted on an energy storage power station, the charging and discharging mode of the energy storage power station is set, and the active power control command of the energy storage power station is generated through the station control layer. When the current power control performance test requirement is to test the reactive power and voltage control capability, the initial values ​​of the short-circuit ratio and impedance ratio parameters of the power grid where the source-storage model is located are set, and the reactive power compensation device (SVG) is set to constant reactive power control mode or constant voltage control mode. The reactive power control command for reactive power control or the reactive power control command for voltage control is generated through the station control layer. The SVG is included in the source-storage model. When the current power control performance test requirement is to test the primary frequency regulation capability, if the non-limiting operating condition of the State of Charge (SOC) of the energy storage power station is being tested, the frequency sequence of the non-limiting operating condition of the power grid where the source-storage model is located is set, and the non-limiting operating condition power control command is generated through the co-control layer of the multi-level collaborative control unit. If the extreme operating condition of the SOC of the energy storage power station is being tested, the initial operating power of the new energy power station is set through the station control layer, and the frequency sequence of the extreme operating condition of the power grid where the source-storage model is located is set, and the extreme operating condition power control command is generated through the co-control layer.

[0014] Preferably, if testing a new energy power station is to be performed, the initial values ​​of the wind and solar power output curves of the new energy power station are set, and the active power control command of the new energy power station is generated through the station control layer of the multi-level collaborative control unit, including the following steps: Set the wind and solar power output curves for new energy power plants to ensure that the maximum wind and solar power output is above the preset percentage of the rated power. The station control layer sequentially issues active power control commands to the new energy power station. The active power control commands to the new energy power station are multiple rated power percentages that first increase in a step and then decrease in a step. The duration of each rated power percentage is longer than the preset duration of the active power control command to the new energy power station.

[0015] Preferably, if the energy storage power station is to be tested, the charging and discharging mode of the energy storage power station is set, and the active power control command of the energy storage power station is generated through the station control layer, including the following steps: When the energy storage power station is set to discharge mode, the active power control command of the energy storage power station discharge mode is issued sequentially through the station control layer. The active power control command of the energy storage power station discharge mode is a number of rated power percentages that first increase in a step and then decrease in a step. The duration of each rated power percentage is longer than the preset duration of the active power control command of the energy storage power station. When the energy storage power station is set to charging mode, the station control layer sequentially issues active power control commands for the charging mode of the energy storage power station. The active power control commands for the charging mode of the energy storage power station are multiple negative values ​​of rated power percentage that first increase in a step and then decrease in a step. The duration of each negative value of rated power percentage is longer than the preset duration of the active power control command for the energy storage power station.

[0016] Preferably, the initial values ​​of the short-circuit ratio and impedance ratio parameters of the power grid where the source-storage model is located are set, and the SVG is set to a constant reactive power control mode or a constant voltage control mode, and reactive power control commands for reactive power control or voltage control are generated through the station control layer, including the following steps: If it is the SVG reactive power control capability test in the reactive power voltage control capability test, then set the initial values ​​of the short-circuit ratio and impedance ratio parameters; Set the SVG to constant reactive power control mode; The station control layer sequentially issues reactive power control commands, which are first incremented and then decremented by a percentage of the rated power. The duration of each percentage of the rated power is longer than the preset reactive power control duration. If the test is for the SVG voltage control capability in the reactive voltage control capability test, then set the SVG to constant voltage control mode. The station control layer sequentially issues voltage-controlled reactive power control commands, which are voltage values ​​that are first increased stepwise, then decreased stepwise, and then increased stepwise again. The duration of each voltage value is longer than the preset voltage control duration.

[0017] Preferably, if the State of Charge (SOC) of the energy storage power station is to be tested under non-limiting operating conditions, the frequency sequence of the non-limiting operating conditions of the power grid where the source-storage model is located is set, and the non-limiting operating condition power control command is generated through the co-control layer of the multi-level collaborative control unit, including the following steps: The frequency sequence of the non-extreme operating condition is set as a frequency step disturbance of a preset frequency, and the state of the preset frequency must be maintained for more than a preset duration, and the step size of the frequency sequence is not higher than a preset value. The co-control layer generates a non-limiting power control command, which initiates a frequency step disturbance according to the frequency sequence of the non-limiting operating condition.

[0018] Preferably, the process of processing and calculating the grid connection point and the operating status of each unit in the source-storage model through the online monitoring unit of the platform includes the following steps: The current power control performance test requirement is that, during the active power control capability test, the online monitoring unit is used to process and calculate the source-storage model grid connection point voltage, current, power control command, voltage and current sampling rate, and power control command sampling rate based on the secondary voltage and current. The current power control performance test requirement is to test the reactive power voltage control capability. Based on the secondary voltage and current, the online monitoring unit is used to process and calculate the source-storage model grid connection point voltage, current, power control command, voltage control command, voltage and current sampling rate, power control command sampling rate, and voltage control command sampling rate. The current power control performance test requirement is to test the primary frequency regulation capability. Based on the secondary voltage and current, the online monitoring unit is used to process and calculate the source-storage model grid connection point voltage, current, voltage and current sampling rate, test signal frequency information, and primary frequency regulation control parameters.

[0019] Preferably, the step of processing and calculating the power data and control data of the new energy and energy storage power station through the online monitoring unit within a set time period based on the grid connection point and the operating status of each unit to obtain the power control performance test results of the source-storage model includes the following steps: When the current power control performance test requirement is to test the active power control capability, based on the voltage, current, power control command, voltage and current sampling rate and power control command sampling rate of the source-storage model grid connection point, within the preset active power control capability test monitoring period, the online monitoring unit is used to calculate the average active power of the source-storage model grid connection point, the response time and control accuracy of the active power control of the source-storage model; When the current power control performance test requirement is to test the reactive power and voltage control capability, if the reactive power compensation device SVG is in constant reactive power control mode, based on the SVG grid connection point voltage, current, power control command, voltage and current sampling rate, and power control command sampling rate, within the preset reactive power and voltage control capability test monitoring period, the online monitoring unit is used to calculate the average reactive power of the SVG grid connection point, the response time of the SVG reactive power control, and the control accuracy. If the SVG is in constant voltage control mode, based on the SVG grid connection point voltage, current, voltage control command, voltage and current sampling rate, and voltage control command sampling rate, the online monitoring unit is used to calculate the response time of the SVG voltage control and the control accuracy. When the current power control performance test requirement is the primary frequency regulation capability test, if the SOC of the energy storage power station is not under extreme conditions, based on the voltage, current, voltage and current sampling rate, frequency information of the test signal, and primary frequency regulation control parameters of the grid connection point of the source and energy storage model, within the preset primary frequency regulation capability test monitoring period, the online monitoring unit is used to calculate the actual active power and theoretical active power of the grid connection point of the new energy and energy storage power station model, as well as the primary frequency regulation response lag time, rise time, adjustment time, and control deviation of the new energy and energy storage power station model; The results of the active power control capability test, reactive power voltage control capability test, and primary frequency regulation capability test are used as the power control performance test results of the new energy and energy storage power station model.

[0020] Based on the same inventive concept, this invention also provides a power control simulation and testing system for new energy and energy storage power stations, comprising: Instruction generation module: Based on the current power control performance testing requirements, it generates corresponding power control instructions through a multi-level collaborative control unit; wherein, the multi-level collaborative control unit communicates between multiple levels via a multi-machine communication unit; Performance testing module: Generates several simulation models through the real-time grid-source situation simulation unit, instructs each simulation model to run the simulation based on the power control command, and performs power control performance tests on each simulation model to obtain analog small signals; the simulation models include: source-storage model and grid model; Signal conversion module: Converts the analog small signal into secondary voltage and current through a secondary measurement unit; Result acquisition module: Based on the secondary voltage and current, the online monitoring unit processes and calculates the grid connection point and the operating status of each unit in the source-storage model; based on the grid connection point and the operating status of each unit, the online monitoring unit processes and calculates the power data and control data of the new energy and energy storage power stations within a set time period to obtain the power control performance test results of the source-storage model.

[0021] Preferably, the instruction generation module is specifically used for: The current power control performance test requirement is to test the active power control capability. If the test is conducted on a new energy power station, the initial value of the wind and solar power output curve of the new energy power station is set, and the active power control command of the new energy power station is generated through the station control layer of the multi-level collaborative control unit. If the test is conducted on an energy storage power station, the charging and discharging mode of the energy storage power station is set, and the active power control command of the energy storage power station is generated through the station control layer. When the current power control performance test requirement is to test the reactive power and voltage control capability, the initial values ​​of the short-circuit ratio and impedance ratio parameters of the power grid where the source-storage model is located are set, and the SVG is set to constant reactive power control mode or constant voltage control mode. The reactive power control command for reactive power control or the reactive power control command for voltage control is generated through the station control layer. The SVG is included in the source-storage model. When the current power control performance test requirement is to test the primary frequency regulation capability, if the non-limiting operating condition of the State of Charge (SOC) of the energy storage power station is being tested, the frequency sequence of the non-limiting operating condition of the power grid where the source-storage model is located is set, and the non-limiting operating condition power control command is generated through the co-control layer of the multi-level collaborative control unit. If the extreme operating condition of the SOC of the energy storage power station is being tested, the initial operating power of the new energy power station is set through the station control layer, and the frequency sequence of the extreme operating condition of the power grid where the source-storage model is located is set, and the extreme operating condition power control command is generated through the co-control layer.

[0022] Based on the same inventive concept, the present invention also provides an electronic device, comprising: at least one processor and a memory; wherein the memory and the processor are connected via a bus; The memory is used to store one or more programs; When the one or more programs are executed by the at least one processor, a power control simulation test method for new energy and energy storage power stations as described above is implemented.

[0023] Based on the same inventive concept, the present invention also provides a readable storage medium having an executable program stored thereon, which, when executed, implements a power control simulation test method for new energy and energy storage power stations as described above.

[0024] Compared with the closest existing technology, the present invention has the following beneficial effects: The power control simulation and testing platform for new energy and energy storage power plants proposed in this invention simulates the various unit modules required for actual power control or testing in real-world engineering projects. Each unit module specifically includes: a multi-level collaborative control unit that communicates between multiple levels via a multi-machine communication unit and generates corresponding power control commands based on current power control performance testing requirements; a real-time grid-source status simulation unit containing several simulation models, each used to simulate operation based on the power control commands and to perform power control performance testing on each simulation model, including source-storage models and grid models; the test results are then converted through a secondary measurement unit, and the online monitoring unit monitors the conversion results, grid connection points, and the operating status of each unit to obtain the power control performance test results of the source-storage model; the various unit modules simulated by this platform constitute the entire power control chain of new energy and energy storage power plants under real-world operating conditions, meeting the power control performance testing requirements of new energy and energy storage power plants. Attached Figure Description

[0025] Figure 1 A basic structural diagram of a power control simulation test platform for new energy and energy storage power stations provided by the present invention; Figure 2 A schematic diagram of the structure of a real-time grid-source situation simulation unit of a power control simulation test platform for new energy and energy storage power stations provided by the present invention; Figure 3 This invention provides an information interaction diagram of a power control simulation test platform for new energy and energy storage power stations. Figure 4 A schematic diagram of the multi-machine communication topology of a power control simulation test platform for new energy and energy storage power stations provided by the present invention; Figure 5 This invention provides a site monitoring system for a power control simulation test platform for new energy and energy storage power plants; Figure 6 The active power control test waveform of a power control simulation test platform for new energy and energy storage power stations provided by the present invention under the charging condition of an energy storage power station; Figure 7The active power control test waveform diagram of the energy storage power station under discharge conditions is provided by the present invention for a power control simulation test platform for new energy and energy storage power stations. Figure 8 The SVG voltage control test waveform diagram of a power control simulation test platform for new energy and energy storage power stations provided by the present invention; Figure 9 The reactive power control test waveform diagram of a power control simulation test platform for new energy and energy storage power stations provided by the present invention; Figure 10 The results of primary frequency regulation test under the non-SOC limit of a power control simulation test platform for new energy and energy storage power stations provided by this invention; Figure 11 The results of a primary frequency regulation test under the energy storage SOC limit of a power control simulation test platform for new energy and energy storage power stations provided by this invention; Figure 12 A flowchart illustrating a power control simulation test method for new energy and energy storage power stations provided by this invention; Figure 13 A schematic diagram of the structure of a power control simulation test system for new energy and energy storage power stations provided by the present invention; Figure 14 This is a schematic diagram of the structure of an electronic device provided by the present invention. Detailed Implementation

[0026] This invention addresses the fact that existing hardware-in-the-loop testing methods for new energy and energy storage converters are mostly focused on single-machine performance testing, only connecting to a single controller, making it difficult to conduct power control performance testing at the new energy and energy storage power station level. Therefore, there is an urgent need to research power control performance simulation testing methods at the new energy and energy storage power station level.

[0027] Unlike hardware-in-the-loop testing of converter control for new energy and energy storage power plants, full-link simulation testing of power control for new energy and energy storage power plants requires consideration of how to integrate secondary measurement loops, multi-level controllers, and communication links into the simulation system with high fidelity. It also needs to conduct power control performance tests such as active power control, reactive power and voltage control, and primary frequency regulation for the entire plant, thereby ensuring the power supply capacity of new energy and energy storage power plants and the safe and stable operation of the power grid. Therefore, this invention provides a simulation testing platform and method for power control of new energy and energy storage power plants, which can solve the above problems.

[0028] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] Example 1: This invention provides a power control simulation and testing platform for new energy and energy storage power stations, the basic structure of which is shown in the schematic diagram below. Figure 1As shown, it includes: a real-time network source situation simulation unit, a secondary measurement unit, a multi-level collaborative control unit, a multi-machine communication unit, and an online monitoring unit.

[0030] (1) The network source situation real-time simulation unit is built in the real-time simulator. The signal output terminal of the network source situation real-time simulation unit is electrically connected to the feedback signal input terminal of the multi-level collaborative control unit and the electrical signal input terminal of the online monitoring unit through the secondary measurement unit. The control terminal of the network source situation real-time simulation unit is electrically connected to the control terminal of the multi-level collaborative control unit. The signal output terminal of the multi-level collaborative control unit is communicatively connected to the signal input terminal of the multi-machine communication unit. The signal output terminal of the multi-machine communication unit is communicatively connected to the signal input terminal of the multi-level collaborative control unit and the communication signal input terminal of the online monitoring unit.

[0031] (2) Multi-level collaborative control unit, used to communicate between multiple levels via multi-machine communication unit, and generate corresponding power control commands according to the current power control performance test requirements, so as to control the real-time simulation unit of network source status.

[0032] (3) The real-time simulation unit of the grid-source situation includes several simulation models. Each simulation model is used to perform simulation operation based on power control commands and to test the power control performance of each simulation model to obtain analog small signals. The simulation models include: source-storage model and grid model.

[0033] (4) Secondary measurement unit, used to convert analog small signals into secondary voltage and current using a power amplifier.

[0034] (5) Online monitoring unit, used to process and calculate the grid connection point and the operating status of each unit in the source-storage model based on the secondary voltage and current of the secondary measurement unit; based on the grid connection point and the operating status of each unit, it processes and calculates the power data and control data of the new energy and energy storage power station within a set time period to obtain the power control performance test results of the source-storage model.

[0035] Furthermore, the power control command includes one of the following: active power control command, reactive power control command, non-limiting condition power control command, and limiting condition power control command.

[0036] Furthermore, the multi-level collaborative control unit includes: a station control layer, a collaborative control layer, and a single-machine layer connected in sequence.

[0037] (1) Station control layer: When the power control command is determined to be generated by the station control layer based on the current power control performance test requirements, it generates active power control command or reactive power control command. (2) Co-control layer: When the power control command is determined to be generated by the co-control layer based on the current power control performance test requirements, it generates non-limiting operating condition power control command or limiting operating condition power control command. (3) Single unit layer: Based on active power control command or reactive power control command, it performs active power control or reactive voltage control on the source-storage model; or based on non-limiting operating condition power control command or limiting operating condition power control command, it performs primary frequency regulation control on the source-storage model under non-limiting operating condition of energy storage state of charge (SOC) or primary frequency regulation control under limit operating condition of energy storage SOC.

[0038] Furthermore, the source-storage model includes: a power loop model of power electronic equipment; the power loop model of power electronic equipment is set in a real-time simulator to simulate the DC side of the new energy power plant model using a controlled DC source model and wind power and photovoltaic power output simulation curves, and to simulate the AC side of the new energy power plant model using an inverter circuit model.

[0039] Furthermore, the single-machine layer is specifically used to determine the access method of the power loop model of the power electronic device based on the single-machine layer, as well as the power topology of the power loop model of the power electronic device, to determine the type of inverter circuit model, and to send corresponding power control commands to the source-storage model for control. The types include switching model level and average value model level.

[0040] The power circuit model of power electronic equipment is specifically used to simulate the AC side of the new energy power plant model by using an inverter circuit at the switching model level when the power control command received by the access method is a switching pulse signal; and to simulate the AC side of the new energy power plant model by using an inverter circuit at the average value model level when the power control command received by the access method is a reference value signal.

[0041] The power topology of the inverter circuit model includes at least one of the following: a three-phase full bridge at the switching model level, a three-phase full bridge in parallel at the switching model level, a T-type three-level at the switching model level, an I-type three-level at the switching model level, an I-type three-level at the switching model level with a boost circuit, a three-phase full bridge at the average value model level, a three-phase full bridge in parallel at the average value model level, a T-type three-level at the average value model level, an I-type three-level at the average value model level, and an I-type three-level at the average value model level with a boost circuit.

[0042] Furthermore, the power grid model includes: a virtual impedance model and an ideal voltage source model connected to it; the virtual impedance model is used to adjust the voltage amplitude of the ideal voltage source model at the current moment based on the active and reactive power of the grid connection point of the new energy and energy storage power station in the previous moment's source-storage model, and the voltage amplitude of the ideal voltage source model at the previous moment, so as to conduct power control performance testing under voltage amplitude disturbance.

[0043] Furthermore, the grid connection point and the operating status of each generating unit include: the voltage, current, frequency, active power and reactive power of the grid connection point, as well as the unit's on / off status, telemetry and remote adjustment command information.

[0044] Specifically, it includes the following: This invention establishes a power control simulation test platform for new energy and energy storage power stations, also known as a full-link on-loop simulation test platform for power control of new energy and energy storage power stations. It covers a real-time grid-source situation simulation unit, a multi-level collaborative control unit, a secondary measurement unit, a multi-machine communication unit, and an online monitoring unit.

[0045] (1) Real-time simulation unit of network source situation: such as Figure 2 As shown, this simulation is primarily used for simulating the characteristics of power grid voltage, frequency, and impedance, as well as the power topology simulation of new energy and energy storage power stations. It is achieved by building a power grid model and new energy and energy storage power station models (i.e., source-storage models) in a real-time simulator. The power grid model consists of an ideal voltage source model and a virtual impedance model. By changing the voltage amplitude and frequency of the ideal voltage source model, the power control capability under voltage amplitude and frequency disturbances can be tested. Considering the limited frequency regulation capability of new energy and energy storage power stations, the closed-loop regulation effect of the frequency in the ideal voltage source model is ignored. Simultaneously, considering the local regulation characteristics of voltage, closed-loop adjustment of the voltage amplitude needs to be achieved through the virtual impedance model. t The voltage amplitude model at time t is as follows:

[0046] In the formula, U ( t )express t Voltage amplitude at any given moment; U ( t -1) indicates t Voltage amplitude at time -1; P pcc ( t -1) Q pcc ( t -1) respectively represent t Active and reactive power at the grid connection point of new energy and energy storage power stations at -1 moment; K It is the ratio of the grid reactance to the resistance; SCR Represents the short-circuit ratio of the power grid; P n , U n These are the rated power and rated voltage of new energy and energy storage power stations, respectively.

[0047] The new energy and energy storage power station model includes power circuit models of power electronic equipment such as photovoltaic inverters, wind turbines, energy storage converters, and var compensators (SVG), as well as box-type transformer models. Specifically, the DC side of the photovoltaic inverters and wind turbines in the power circuit models of the power electronic equipment uses a controlled DC source model and simulates wind and photovoltaic power output curves. The AC side uses an inverter circuit model, including switching models and average value models, with five topologies: three-phase full-bridge, three-phase full-bridge in parallel, T-type three-level, I-type three-level, and I-type three-level with boost circuit topology. The specific inverter circuit model selection depends on the control unit connection method and actual power topology of the power electronic equipment in the power station under test.

[0048] (2) Multi-level collaborative control unit: It includes a station control layer, a collaborative control layer and a single-unit layer. The station control layer adopts a real-type station control system, which has active power control and reactive power voltage control functions for new energy and energy storage power stations. The collaborative control layer adopts a real-type collaborative control device to realize the primary frequency regulation control of energy storage power stations and the primary frequency regulation control of new energy power stations under the extreme conditions of energy storage SOC. The single-unit layer consists of controllers for photovoltaic inverters, wind power converters, energy storage converters and reactive power compensation devices. When the controller output signal is a switching pulse signal, the power electronic equipment inverter circuit in the grid source situation real-time simulation unit adopts a switching model. When the controller output signal is a reference value signal, the power electronic equipment inverter circuit adopts an average value model.

[0049] (3) Secondary Measurement Unit: Primarily used to simulate the secondary measurement circuit in the field. It utilizes a power amplifier to convert the small analog signals output by the real-time simulator into secondary voltage and current signals, which are then connected to the measurement modules of the station control layer and the collaborative control layer. The formulas for calculating the transformation ratio of the secondary voltage and current are as follows:

[0050] In the formula, K u , K i These represent the turns ratios of the secondary voltage and current output by the secondary measurement unit, respectively. K simu , K simi These represent the small-signal turns ratios of the analog voltage and current outputs of the real-time simulator, respectively. K pu , Kpi These represent the voltage and current gain of the power amplifier output, respectively.

[0051] The multi-machine communication unit is mainly used to realistically reproduce the communication links between multi-level control systems in the field and simulate the communication objects of no less than 100 new energy and energy storage units and 2 reactive power compensation devices. Specifically, the monitoring system of the new energy and energy storage power station uses the IEC 60870-104 protocol to communicate with the station's power control system; the station's power control system, the energy storage co-control device, and the unit-level data acquisition device all use the IEC 60870-104 protocol; and the unit-level data acquisition device uses the Modbus-RTU protocol to communicate with the new energy, energy storage units, and reactive power compensation devices. Considering the limited number of analog-to-digital interfaces of the real-time simulator, making it difficult to connect a large number of new energy and energy storage unit controllers, and to realistically reproduce the multi-level communication links, a communication management unit and a serial server are used to simulate the communication interaction process between the data acquisition unit and the new energy units, energy storage units, and reactive power compensation devices.

[0052] The online monitoring unit is primarily used to simulate the monitoring layer of a power plant, monitoring the grid connection point and the operating status of each unit. Simultaneously, it can conduct power control performance testing and evaluation for new energy and energy storage power plants. Grid connection point status includes grid connection point voltage. U pcc Current I pcc ,frequency f pcc Active power P pcc With reactive power Q pcc The operating status of each unit includes the unit's start-up and shutdown status, telemetry and remote adjustment command information.

[0053] like Figure 3 The diagram shown illustrates the information interaction within a full-link on-loop simulation test platform for power control in new energy and energy storage power stations. U sim , I sim The voltage and current analog signals output by the real-time grid status simulation unit include the voltage and current of the entire substation grid connection point, energy storage unit, and reactive power compensation device. U pcc , I pcc , U BESS , I BESS , U SVG , I SVGThese represent the voltage and current of the entire substation grid connection point, energy storage unit, and reactive power compensation device after the analog small signal is converted by the secondary measurement unit; PWM, U ref These are the switching pulse signal and reference value signal output by the single-machine layer controller to drive the inverter circuit of the power electronic equipment; P ord , Q ord These are the active power and reactive power control commands output by the station control layer power control system, respectively. P PFR This represents the primary frequency regulation power control command output by the energy storage co-control device; P PVord , Q PVord , P WFord , Q WFord , P BESSSord , Q BESSord , Q SVGord These represent the active power and reactive power remote adjustment commands that the multi-machine communication unit sends to the photovoltaic inverter, wind turbine, energy storage converter, and reactive power compensation device at the unit layer (real-time simulation unit of network and source status).

[0054] The specific effects achieved by the platform built by this invention are as follows: The invented full-link on-loop simulation test platform for power control of new energy and energy storage power stations covers a real-time simulation unit of grid and source status, a multi-level collaborative control unit, a secondary measurement unit and a multi-machine communication unit. It realizes the control link, communication link and measurement link consistent with the actual engineering site, and improves the fidelity of the site-level simulation scenario.

[0055] Example 2: Based on the same inventive concept, this invention also provides a simulation test method for power control of new energy and energy storage power stations, the flowchart of which is shown below. Figure 12 As shown, it includes the following steps: Step 1: Based on the current power control performance testing requirements, the platform's multi-level collaborative control unit generates corresponding power control commands to control the real-time grid-source status simulation unit. The multi-level collaborative control unit communicates between multiple levels via a multi-machine communication unit. Step 2: The platform's real-time grid-source status simulation unit generates several simulation models. Based on the power control commands, each simulation model is instructed to run, and power control performance is tested to obtain analog small signals. The simulation models include a source-storage model and a grid model. Step 3: The platform's secondary measurement unit converts the analog small signals into secondary voltage and current. Step 4: Based on the secondary voltage and current, the platform's online monitoring unit processes and calculates the grid connection point and the operating status of each unit in the source-storage model. Based on the grid connection point and the operating status of each unit, within a set time period, the online monitoring unit processes and calculates the power data and control data of the new energy and energy storage power stations to obtain the power control performance test results of the source-storage model.

[0056] Furthermore, based on the current power control performance testing requirements, corresponding power control commands are generated through the platform's multi-level collaborative control unit. Specific steps include: (1) When the current power control performance test requirement is active power control capability test, if the test is conducted on a new energy power station, the initial value of the wind and solar power output curve of the new energy power station is set, and the active power control command of the new energy power station is generated through the station control layer of the multi-level collaborative control unit; if the test is conducted on an energy storage power station, the charging and discharging mode of the energy storage power station is set, and the active power control command of the energy storage power station is generated through the station control layer.

[0057] (2) When the current power control performance test requirement is to test the reactive power and voltage control capability, the initial values ​​of the short-circuit ratio and impedance ratio parameters of the power grid where the source-storage model is located are set, and the SVG is set to be in constant reactive power control mode or constant voltage control mode. The reactive power control command for reactive power control or the reactive power control command for voltage control is generated through the station control layer. The SVG is included in the source-storage model.

[0058] (3) When the current power control performance test requirement is a primary frequency regulation capability test, if the non-limited operating condition of the state of charge (SOC) of the energy storage power station is tested, the frequency sequence of the non-limited operating condition of the power grid where the source-storage model is located is set, and the non-limited operating condition power control command is generated through the co-control layer of the multi-level collaborative control unit; if the limited operating condition of the SOC of the energy storage power station is tested, the initial operating power of the new energy power station is set through the station control layer, and the frequency sequence of the limited operating condition of the power grid where the source-storage model is located is set, and the limited operating condition power control command is generated through the co-control layer.

[0059] Furthermore, if testing is to be conducted on a new energy power station, initial values ​​for the wind and solar power output curves of the new energy power station are set, and active power control commands for the new energy power station are generated through the station control layer of the multi-level collaborative control unit, including the following steps: (1) Set the wind and solar power output curves of the new energy power station to ensure that the maximum output of wind and solar power is above the preset rated power percentage. (2) Issue active power control commands of the new energy power station in sequence through the station control layer. The active power control commands of the new energy power station are multiple rated power percentages that first increase in a step and then decrease in a step. The duration of each rated power percentage is longer than the preset duration of the active power control command of the new energy power station.

[0060] Furthermore, if testing the energy storage power station is required, the charging and discharging modes of the energy storage power station are set, and active power control commands for the energy storage power station are generated through the station control layer, including the following steps: (1) When the energy storage power station is set to discharge mode, the active power control command for the discharge mode of the energy storage power station is issued sequentially through the station control layer. The active power control command for the discharge mode of the energy storage power station is a series of rated power percentages that increase in a stepwise manner and then decrease in a stepwise manner. The duration of each rated power percentage is longer than the preset duration of the active power control command for the energy storage power station. (2) When the energy storage power station is set to charge mode, the active power control command for the charging mode of the energy storage power station is issued sequentially through the station control layer. The active power control command for the charging mode of the energy storage power station is a series of negative rated power percentages that increase in a stepwise manner and then decrease in a stepwise manner. The duration of each negative rated power percentage is longer than the preset duration of the active power control command for the energy storage power station.

[0061] Furthermore, the initial values ​​of the short-circuit ratio and impedance ratio parameters of the power grid where the source-storage model is located are set, and the SVG is set to constant reactive power control mode or constant voltage control mode. Reactive power control commands for reactive power control or voltage control are generated through the station control layer, including the following steps: (1) If it is the reactive power control capability test of SVG in the reactive power voltage control capability test, then set the initial values ​​of the short-circuit ratio and impedance ratio parameters. (2) Set the SVG to constant reactive power control mode. (3) Issue reactive power control commands for reactive power control sequentially through the station control layer. The reactive power control commands for reactive power control are first incremented and then decremented by a percentage of rated power. The duration of each percentage of rated power is longer than the preset reactive power control duration. (4) If it is the reactive power control capability test of SVG in the reactive power voltage control capability test, then set the SVG to constant voltage control mode. (5) Issue reactive power control commands for voltage control sequentially through the station control layer. The reactive power control commands for voltage control are first incremented and then decremented and then incremented by a voltage value. The duration of each voltage value is longer than the preset voltage control duration.

[0062] Furthermore, if the State of Charge (SOC) of the energy storage power station is to be tested under non-limiting operating conditions, the frequency sequence of the non-limiting operating conditions of the power grid in which the source-storage model is located is set, and the non-limiting operating condition power control command is generated through the co-control layer of the multi-level collaborative control unit, including the following steps: (1) Set the frequency sequence of the non-extreme operating condition to a frequency step disturbance of a preset frequency, and the state of the preset frequency must be maintained for more than a preset time, and the step size of the frequency sequence is not higher than the preset value. (2) Generate a power control command for the non-extreme operating condition through the co-control layer. The power control command for the non-extreme operating condition starts the frequency step disturbance according to the frequency sequence of the non-extreme operating condition.

[0063] Furthermore, the platform's online monitoring unit processes and calculates the grid connection point and the operating status of each unit in the source-storage model, including the following steps: (1) When the current power control performance test requirement is active power control capability test, the online monitoring unit is used to process and calculate the source-storage model grid connection point voltage, current, power control command, voltage and current sampling rate, and power control command sampling rate based on the secondary voltage and current. (2) When the current power control performance test requirement is reactive power voltage control capability test, the online monitoring unit is used to process and calculate the source-storage model grid connection point voltage, current, power control command, voltage control command, voltage and current sampling rate, power control command sampling rate, and voltage control command sampling rate based on the secondary voltage and current. (3) When the current power control performance test requirement is primary frequency regulation capability test, the online monitoring unit is used to process and calculate the source-storage model grid connection point voltage, current, voltage and current sampling rate, test signal frequency information, and primary frequency regulation control parameters based on the secondary voltage and current.

[0064] Furthermore, based on the grid connection point and the operating status of each unit, the power data and control data of the new energy and energy storage power stations are processed and calculated by the online monitoring unit within a set time period to obtain the power control performance test results of the source-storage model. The specific steps include: (1) When the current power control performance test requirement is active power control capability test, based on the voltage, current, power control command, voltage and current sampling rate and power control command sampling rate of the source-storage model grid connection point, within the preset active power control capability test monitoring period, the online monitoring unit is used to calculate the average active power of the source-storage model grid connection point, the response time and control accuracy of the source-storage model active power control. (2) When the current power control performance test requirement is reactive power voltage control capability test, if the reactive power compensation device SVG is in constant reactive power control mode, based on the voltage, current, power control command, voltage and current sampling rate and power control command sampling rate of the SVG grid connection point, within the preset reactive power voltage control capability test monitoring period, the online monitoring unit is used to calculate the average reactive power of the SVG grid connection point, the response time and control accuracy of the SVG reactive power control; if the SVG is in constant voltage control mode, based on the voltage, current, voltage control command, voltage and current sampling rate and voltage control command sampling rate of the SVG grid connection point, the online monitoring unit is used to calculate the response time and control accuracy of the SVG voltage control. (3) When the current power control performance test requirement is the primary frequency regulation capability test, if the SOC of the energy storage power station is not under extreme conditions, based on the voltage, current, voltage and current sampling rate, frequency information of the test signal, and primary frequency regulation control parameters of the grid connection point of the source-storage model, within the preset primary frequency regulation capability test monitoring period, the online monitoring unit is used to calculate the actual active power and theoretical active power of the grid connection point of the new energy and energy storage power station model, as well as the primary frequency regulation response lag time, rise time, adjustment time, and control deviation of the new energy and energy storage power station model. (4) The results of the active power control capability test, reactive power voltage control capability test, and primary frequency regulation capability test are used as the power control performance test results of the new energy and energy storage power station model.

[0065] This invention can conduct power control capability tests on new energy and energy storage power stations, including active power control, reactive power control, and voltage control capability tests.

[0066] I. The steps for conducting active power control capability tests on new energy power plants are as follows: (1) Set the wind and solar power output curves to ensure that the maximum output of wind and solar power can reach the rated power. P N More than 80%.

[0067] (2) The power control system at the station control level sequentially issues 0% P N 20% P N 40% P N 60% P N 80% P N 60% PN 40% P N 20% P N 0% P N The active control commands are maintained for more than 60 seconds each.

[0068] (3) During the test, the online monitoring unit recorded the voltage at the grid connection point of the entire station. U pcc Current I pcc and power control commands P ord The voltage and current sampling rate shall not be less than 5kHz, and the power control command sampling rate shall not be less than 10Hz.

[0069] (4) The online monitoring unit calculates the average active power of the entire station at the grid connection point based on the recorded data with a period of 0.2s. P pcc The response time and control accuracy of active power control in new energy power plants are calculated.

[0070] Response time refers to the time from the moment the command is issued to the moment when the actual active power output reaches 90% of the target adjustment amount. The control accuracy is calculated as: (actual adjustment amount - target adjustment amount) / rated power.

[0071] II. The steps for conducting active power control capability tests on energy storage power stations are as follows: (1) Set the energy storage power station to discharge mode.

[0072] (2) The power control system at the station control level sequentially issues 0% P N 20% P N 40% P N 60% P N 80% P N 100% P N 80% P N 60% P N 40% P N 20% P N 0% P N The active control commands are maintained for more than 60 seconds each.

[0073] (3) Set the energy storage station to charging mode.

[0074] (4) The power control system at the station control level sequentially issues 0% P N -20% P N -40% P N -60% P N -80% P N -100% P N -80% P N -60% P N -40% P N -20% P N 0% P N The active control commands are maintained for more than 60 seconds each.

[0075] (5) During the test, the online monitoring unit records the voltage at the grid connection point of the energy storage power station. U BESS Current I BESS and power control commands P ord The voltage and current sampling rate shall not be less than 5kHz, and the power control command sampling rate shall not be less than 10Hz.

[0076] (6) The online monitoring unit calculates the average active power of the energy storage power station at the grid connection point based on the recorded data, with a period of 0.2s. P BESS The response time and control accuracy of the active power control of the energy storage power station are calculated.

[0077] III. When conducting reactive power voltage control capability testing of the SVG reactive power compensation device, the steps are as follows: (1) Set the short-circuit ratio (SCR) and impedance ratio of the power grid where the power station is located in the real-time simulation unit. K parameter. (2) Set the SVG to constant reactive power control mode.

[0078] (3) The power control system at the station control level sequentially issues 0% Q N 20% Q N 40% Q N 60%Q N 80% Q N 100% Q N 80% Q N 60% Q N 40% Q N 20% Q N 0% Q N The active control commands are maintained for more than 60 seconds each.

[0079] (4) During the test, the online monitoring unit records the voltage at the SVG grid connection point. U SVG Current I SVG and power control commands Q ord The voltage and current sampling rate shall not be less than 5kHz, and the power control command sampling rate shall not be less than 10Hz.

[0080] (5) The online monitoring unit calculates the average reactive power of the SVG grid connection point with a period of 0.2s based on the recorded data. Q SVG The response time and control accuracy of SVG reactive power control are calculated.

[0081] (6) Set the SVG to constant voltage control mode (taking the grid connection point rated voltage of 110kV as an example).

[0082] (7) Through the power control system of the station control layer, voltage control commands of 110kV, 111kV, 112kV, 113kV, 112kV, 111kV, 110kV, 109kV, 108kV, 107kV, 108kV, 109kV and 110kV are issued in sequence, and each command is maintained for more than 60s.

[0083] (8) During the test, the online monitoring unit records the voltage at the SVG grid connection point. U SVG Current I SVG and voltage control commands U ord The voltage and current sampling rates shall not be less than 5kHz, and the voltage control command sampling rate shall not be less than 10Hz.

[0084] (9) The online monitoring unit calculates the response time and control accuracy of SVG voltage control based on the recorded data.

[0085] IV. Conduct primary frequency regulation capability tests on new energy and energy storage power stations, including primary frequency regulation capability tests of energy storage SOCs under non-extreme and extreme conditions.

[0086] 1) When conducting a primary frequency regulation test of the energy storage SOC under non-extreme operating conditions, the steps are as follows: (1) Set the SOC state of the energy storage power station to be in a non-limiting operating condition.

[0087] (2) Set the frequency sequence of the power grid where the power station is located in the real-time simulation unit of the power grid source. f pcc ( t Taking a 49.9Hz frequency step disturbance as an example, the frequency sequence is as follows, where the 49.9Hz state must be maintained for more than 15 seconds, and the command sequence step size must not exceed 10ms: .

[0088] (3) Initiate a frequency step disturbance sequence, during which the online monitoring unit records the voltage at the grid connection point of the entire station. U pcc Current I pcc The recording duration should cover at least 10 seconds before the frequency disturbance to 10 seconds after the frequency recovery, and the voltage and current sampling rate should be no less than 10kHz.

[0089] (4) The online monitoring unit calculates the actual active power of the power station at the grid connection point with a period of 20ms, obtains the frequency information of the test signal, and calculates the theoretical active power of the power station at the grid connection point based on the primary frequency regulation control parameters.

[0090] (5) Calculate the lag time, rise time, adjustment time and control deviation of the primary frequency regulation response of the power station.

[0091] 2) When conducting a primary frequency regulation test of the energy storage SOC under extreme operating conditions, the steps are as follows: (1) Set the SOC state of the energy storage power station to the charging limit condition. At the same time, set the initial operating power of the new energy power station through the power control system of the station control layer to ensure that the new energy power station has a power reduction space of not less than 10%.

[0092] (2) Set the frequency sequence of the power grid where the power station is located in the real-time simulation unit of the power grid source. f pcc ( t This causes a frequency disturbance in the power grid. Taking a 50.1Hz frequency step disturbance as an example, the frequency sequence is as follows, where the 50.1Hz state must be maintained for more than 15 seconds, and the command sequence step size must not exceed 10ms: .

[0093] (3) Initiate a frequency step disturbance sequence, during which the online monitoring unit records the voltage at the grid connection point of the entire station. U pcc Current I pcc The recording duration should cover at least 10 seconds before the frequency disturbance to 10 seconds after the frequency recovery, and the voltage and current sampling rate should be no less than 10kHz.

[0094] (4) Set the SOC state of the energy storage power station to the discharge limit condition. At the same time, set the initial operating power of the new energy power station through the power control system of the station control layer to ensure that the new energy power station has a power adjustment space of not less than 6%.

[0095] (5) Set the frequency sequence of the power grid where the power station is located in the real-time simulation unit of the power grid. f pcc ( t To induce a frequency down-disturbance in the power grid, taking a 49.9Hz frequency step disturbance as an example, the frequency sequence is as follows, where the 49.9Hz state must be maintained for more than 15 seconds, and the command sequence step size must not exceed 10ms: .

[0096] (6) Initiate a frequency step disturbance sequence, during which the online monitoring unit records the voltage at the grid connection point of the entire station. U pcc Current I pcc The recording duration should cover at least 10 seconds before the frequency disturbance to 10 seconds after the frequency recovery, and the voltage and current sampling rate should be no less than 10kHz.

[0097] (7) The online monitoring unit calculates the actual active power of the power station at the grid connection point with a period of 20ms, obtains the frequency information of the test signal, and calculates the theoretical active power of the power station at the grid connection point based on the primary frequency regulation control parameters.

[0098] (8) Calculate the primary frequency regulation response lag time, rise time, adjustment time and control deviation of the power station.

[0099] The specific effects of the method provided by this invention are as follows: (1) Based on the full-link on-loop simulation test platform for power control of new energy and energy storage power stations, the invented power control test method accurately characterizes the dynamic characteristics of power control by recording electrical and communication quantities through the online monitoring unit; and realizes closed-loop test of reactive voltage control by establishing a virtual impedance model in the real-time simulation unit of grid and source status.

[0100] (2) Based on the full-link on-loop simulation test platform for power control of new energy and energy storage power stations, the invented primary frequency regulation test method sets the SOC state and frequency disturbance sequence of the energy storage power station in the real-time simulation unit of grid source status, and sets the initial operating power of the new energy power station in the power control system of the station control layer, so as to realize the primary frequency regulation capability test of the energy storage power station under the extreme and non-extreme SOC conditions.

[0101] (3) The invented power control full-link on-loop simulation test platform for new energy and energy storage power stations covers a real-time simulation unit of grid and source status, a multi-level collaborative control unit, a secondary measurement unit and a multi-machine communication unit, realizing control link, communication link and measurement link consistent with the actual engineering site, and improving the restoration of the site-level simulation scenario.

[0102] To verify the effectiveness of this invention, a full-link on-loop simulation test platform for power control of new energy and energy storage power stations was built according to the invention steps. The rated voltage of the power station's grid connection point was 110kV, the rated power of the new energy unit was 1MW, the rated power of the energy storage converter was 500kW, and the rated power of the reactive power compensation device was 10MVar. The power station communication topology is as follows: Figure 4 It includes 20 energy storage converters, 40 wind turbines, 40 photovoltaic units, and 2 reactive power compensation devices; the station control layer monitoring system, such as... Figure 5 As shown, it can monitor the operating information of the entire station's grid connection point, such as voltage, current, power, and frequency, as well as the on / off status, power remote adjustment, and power telemetry information of new energy units, energy storage units, and reactive power compensation devices.

[0103] Based on the established end-to-the-loop simulation test platform, active power control tests were conducted on the energy storage power station under both charging and discharging states. The test waveforms are shown below. Figure 6 and Figure 7 The test results are shown in Tables 1 and 2; subsequently, the reactive power voltage control capability of the reactive power compensation device was tested under the grid impedance scenario of SCR=5 and K=10, and the test waveforms are shown in Tables 1 and 2. Figure 8 and Figure 9 The test results are shown in Tables 3 and 4. Finally, the primary frequency regulation capability of the energy storage power station under extreme and non-extreme SOC conditions was tested, and the test waveforms are shown in Tables 3 and 4. Figure 10 and Figure 11 The test results are shown in Tables 5 and 6.

[0104] Table 1. Power control test results under charging conditions of energy storage power station

[0105] Table 2. Active power control test results under discharge conditions of the energy storage power station

[0106] Table 3 SVG Voltage Control Test Results

[0107] Table 4. SVG Reactive Power Control Test Results

[0108] Table 5. Primary frequency regulation test results under non-SOC limit of energy storage

[0109] Table 6. Primary frequency regulation test results under the limit of energy storage SOC

[0110] The test results show that the present invention can restore the real control link and secondary measurement loop between the station control layer, the co-control layer and the unit layer controller, and can restore the real communication link between the station control layer, the co-control layer and 102 new energy, energy storage and SVG units. The platform can record control commands and electrical measurement information through the online monitoring unit to realize the active power control test, reactive power voltage control test and primary frequency regulation capability test of new energy and energy storage power stations under SOC limit and non-limit conditions.

[0111] Example 3: Based on the same inventive concept, this invention also provides a power control simulation test system for new energy and energy storage power stations, the structure of which is as follows: Figure 13 As shown, it includes: (1) Command generation module: Based on the current power control performance test requirements, the corresponding power control command is generated through the multi-level collaborative control unit of the platform; among which, the multi-level collaborative control unit communicates between multiple levels through the multi-machine communication unit. (2) Performance test module: Several simulation models are generated through the real-time simulation unit of the grid-source situation of the platform. Based on the power control command, each simulation model is instructed to run the simulation and the power control performance of each simulation model is tested to obtain analog small signals; the simulation models include: source-storage model and grid model. (3) Signal conversion module: The analog small signals are converted into secondary voltage and current through the secondary measurement unit of the platform. (4) Result acquisition module: Based on the secondary voltage and current, the online monitoring unit of the platform processes and calculates the grid connection point and the operating status of each unit in the source-storage model; based on the grid connection point and the operating status of each unit, the power data and control data of the new energy and energy storage power station are processed and calculated through the online monitoring unit within a set time period to obtain the power control performance test results of the source-storage model.

[0112] Furthermore, the instruction generation module is specifically used for: (1) When the current power control performance test requirement is active power control capability test, if the test is conducted on a new energy power station, the initial value of the wind and solar power output curve of the new energy power station is set, and the active power control command of the new energy power station is generated through the station control layer of the multi-level collaborative control unit; if the test is conducted on an energy storage power station, the charging and discharging mode of the energy storage power station is set, and the active power control command of the energy storage power station is generated through the station control layer; (2) When the current power control performance test requirement is reactive power and voltage control capability test, the initial value of the short-circuit ratio and impedance ratio parameters of the power grid where the source-storage model is located is set, and the SVG is set to be in constant reactive power control mode or constant voltage control mode, and the active power control command of the energy storage power station is generated through the station control layer. Reactive power control command for reactive power control or reactive power control command for voltage control; SVG is included in the source-storage model; (3) When the current power control performance test requirement is a primary frequency regulation capability test, if the non-limit condition of the state of charge (SOC) of the energy storage power station is tested, the frequency sequence of the non-limit condition of the power grid where the source-storage model is located is set, and the non-limit condition power control command is generated through the co-control layer of the multi-level collaborative control unit; if the limit condition of the SOC of the energy storage power station is tested, the initial operating power of the new energy station is set through the station control layer, and the frequency sequence of the limit condition of the power grid where the source-storage model is located is set, and the limit condition power control command is generated through the co-control layer.

[0113] Example 4: like Figure 14 As shown, the present invention also provides an electronic device, which may be a computer device, a microcontroller device, a smart mobile device, etc. The electronic device in this embodiment may include a processor, a memory, a transceiver component, etc. The memory, processor, and transceiver component are connected via a bus; the memory can be used to store executable programs, and an exemplary executable program may include instructions; the processor is used to execute the instructions stored in the memory. The memory can also be used to store data, which can be accessed and / or modified when instructions are executed.

[0114] The processor may be a Central Processing Unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing and control core of the terminal, and it is suitable for implementing one or more instructions. Specifically, it is suitable for loading and executing one or more instructions in the storage medium to realize the corresponding method flow or corresponding function, so as to realize the steps of the power control simulation test method for a new energy and energy storage power station in the above embodiments.

[0115] Example 5: Based on the same inventive concept, this invention also provides a readable storage medium, specifically an electronic device readable storage medium (Memory). This readable storage medium is a memory device within an electronic device used to store programs and data. It is understood that the storage medium here can include both built-in storage media within the electronic device and extended storage media supported by the electronic device. The storage medium provides storage space, which stores the terminal's operating system. Furthermore, this storage space also stores one or more instructions suitable for loading and execution by a processor. These instructions can be one or more executable programs (including program code). It should be noted that the storage medium here can be high-speed RAM or non-volatile memory, such as at least one disk storage device. Loading and executing one or more instructions stored in the storage medium by the processor can implement the steps of the power control simulation test method for a new energy and energy storage power station described in the above embodiments.

[0116] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0117] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0118] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0119] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0120] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit its protection scope. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that after reading the present invention, they can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the application, but these changes, modifications or equivalent substitutions are all within the protection scope of the claims of the present invention.

Claims

1. A power control simulation and testing platform for new energy and energy storage power stations, characterized in that, include: The system includes a real-time network status simulation unit, a secondary measurement unit, a multi-level collaborative control unit, a multi-machine communication unit, and an online monitoring unit. The network source situation real-time simulation unit is built in a real-time simulator. The signal output terminal of the network source situation real-time simulation unit is electrically connected to the feedback signal input terminal of the multi-level collaborative control unit and the electrical signal input terminal of the online monitoring unit via the secondary measurement unit. The control terminal of the network source situation real-time simulation unit is electrically connected to the control terminal of the multi-level collaborative control unit. The signal output terminal of the multi-level collaborative control unit is communicatively connected to the signal input terminal of the multi-machine communication unit. The signal output terminal of the multi-machine communication unit is communicatively connected to the signal input terminal of the multi-level collaborative control unit and the communication signal input terminal of the online monitoring unit. The multi-level collaborative control unit is used to communicate between multiple levels via the multi-machine communication unit, and to generate corresponding power control commands according to the current power control performance test requirements, so as to control the real-time simulation unit of the network-source situation; the power control commands include one of the following: active power control commands, reactive power control commands, non-extreme operating condition power control commands, and extreme operating condition power control commands; The multi-level collaborative control unit includes: a station control layer, a co-control layer, and a single-unit layer connected in sequence; the station control layer is used to generate active power control commands or reactive power control commands when it is determined that the power control command will be generated by the station control layer according to the current power control performance test requirements; the co-control layer is used to generate non-limiting condition power control commands or limiting condition power control commands when it is determined that the power control command will be generated by the co-control layer according to the current power control performance test requirements; the single-unit layer is used to perform active power control or reactive voltage control on the new energy and energy storage power station model based on the active power control commands or reactive power control commands; or to perform primary frequency regulation control on the new energy and energy storage power station model under non-limiting conditions of energy storage state of charge (SOC) or under limiting conditions of energy storage SOC based on non-limiting condition power control commands or limiting condition power control commands. The real-time simulation unit for the grid-source situation includes several simulation models. Each simulation model is used to perform simulation operation based on the power control command, and to test the power control performance of each simulation model to obtain analog small signals. The simulation models include: a new energy and energy storage power station model and a power grid model. The secondary measurement unit is used to convert the analog small signal into secondary voltage and current using a power amplifier; The online monitoring unit is used to process and calculate the grid connection point and the operating status of each unit in the new energy and energy storage power station model based on the secondary voltage and current of the secondary measurement unit; based on the grid connection point and the operating status of each unit, it processes and calculates the power data and control data of the new energy and energy storage power station model within a set time period to obtain the power control performance test results of the new energy and energy storage power station model.

2. The power control simulation test platform for new energy and energy storage power stations as described in claim 1, characterized in that, The new energy and energy storage power station model includes: a power circuit model of power electronic equipment; The power circuit model of the power electronic equipment is set in the real-time simulator to simulate the DC side of the new energy power station model using the controlled DC source model and the output simulation curves of wind power and photovoltaic power, and to simulate the AC side of the new energy power station model using the inverter circuit model.

3. The power control simulation test platform for new energy and energy storage power stations as described in claim 2, characterized in that, The single-machine layer is specifically used to determine the type of the inverter circuit model based on the access method of the power loop model of the power electronic device and the power topology of the power loop model of the power electronic device, and to send corresponding power control commands to the new energy and energy storage power station model for control. The type includes switch model level and average value model level. The power circuit model of the power electronic equipment is specifically used to simulate the AC side of the new energy power station model by using an inverter circuit at the switching model level when the power control command received by the access method is a switching pulse signal; and to simulate the AC side of the new energy power station model by using an inverter circuit at the average value model level when the power control command received by the access method is a reference value signal. The power topology of the inverter circuit model includes at least one of the following: a three-phase full bridge at the switching model level, a three-phase full bridge in parallel at the switching model level, a T-type three-level at the switching model level, an I-type three-level at the switching model level, an I-type three-level at the switching model level with a boost circuit, a three-phase full bridge at the average value model level, a three-phase full bridge in parallel at the average value model level, a T-type three-level at the average value model level, an I-type three-level at the average value model level, and an I-type three-level at the average value model level with a boost circuit.

4. The power control simulation test platform for new energy and energy storage power stations as described in claim 1, characterized in that, The power grid model includes: a virtual impedance model and an ideal voltage source model connected to it; The virtual impedance model is used to adjust the voltage amplitude of the ideal voltage source model at the current moment based on the active and reactive power of the grid connection point of the new energy and energy storage power station model in the previous moment, and the voltage amplitude of the ideal voltage source model in the previous moment, so as to conduct power control performance testing under voltage amplitude disturbance. The voltage amplitude model includes the following calculation methods: in, U ( t )express t Voltage amplitude at any given moment; U ( t -1) indicates t Voltage amplitude at time -1; P pcc ( t -1) Q pcc ( t -1) respectively represent t Active and reactive power at the grid connection point of the new energy and energy storage power station model at time -1. K This is the ratio of the grid reactance to the resistance. SCR Represents the short-circuit ratio of the power grid. P n , U n These are the rated power and rated voltage of the new energy and energy storage power station models, respectively.

5. The power control simulation test platform for new energy and energy storage power stations as described in claim 1, characterized in that, The grid connection point and the operating status of each generating unit include: the voltage, current, frequency, active power and reactive power of the grid connection point, as well as the unit start-up and shutdown status, telemetry and remote adjustment command information of each generating unit.

6. A simulation test method for power control of new energy and energy storage power stations, characterized in that, A power control simulation test platform for new energy and energy storage power stations according to any one of claims 1 to 5 includes the following steps: Based on the current power control performance testing requirements, the platform generates corresponding power control commands through its multi-level collaborative control unit; wherein, the multi-level collaborative control unit communicates between multiple levels via a multi-machine communication unit; Based on the current power control performance testing requirements, the platform generates corresponding power control commands through its multi-level collaborative control unit. This includes: when the current power control performance testing requirement is active power control capability testing, if testing a new energy power station model, setting the initial values ​​of the wind and solar power output curves of the new energy power station model, and generating active power control commands for the new energy power station model through the station control layer of the multi-level collaborative control unit; if testing an energy storage power station model, setting the charging and discharging mode of the energy storage power station model, and generating active power control commands for the energy storage power station model through the station control layer; when the current power control performance testing requirement is reactive power voltage control capability testing, setting the initial values ​​of the short-circuit ratio and impedance ratio parameters of the power grid where the new energy and energy storage power station models are located, and setting the reactive power compensation device SVG to be in constant reactive power control mode or constant voltage control mode. The voltage control mode generates reactive power control commands for reactive power control or voltage control through the station control layer; the SVG is included in the new energy and energy storage power station model; when the current power control performance test requirement is a primary frequency regulation capability test, if the non-limiting operating condition of the state of charge (SOC) of the energy storage power station model is tested, the frequency sequence of the non-limiting operating condition of the power grid where the new energy and energy storage power station model is located is set, and the non-limiting operating condition power control command is generated through the co-control layer of the multi-level collaborative control unit; if the extreme operating condition of the SOC of the energy storage power station model is tested, the initial operating power of the new energy power station model is set through the station control layer, and the frequency sequence of the extreme operating condition of the power grid where the new energy and energy storage power station model is located is set, and the extreme operating condition power control command is generated through the co-control layer. Several simulation models are generated through the real-time network status simulation unit of the platform. Based on the power control command, each simulation model is instructed to run the simulation and the power control performance of each simulation model is tested to obtain analog small signals. The simulation models include: new energy and energy storage power station models and power grid models. The analog signal is converted into secondary voltage and current by the secondary measurement unit of the platform. Based on the secondary voltage and current, the online monitoring unit of the platform processes and calculates the grid connection point and the operating status of each unit in the new energy and energy storage power station model; based on the grid connection point and the operating status of each unit, the online monitoring unit processes and calculates the power data and control data of the new energy and energy storage power station model within a set time period to obtain the power control performance test results of the new energy and energy storage power station model.

7. The method as described in claim 6, characterized in that, If the new energy power station model is to be tested, the initial values ​​of the wind and solar power output curves of the new energy power station model are set, and the active power control command of the new energy power station model is generated through the station control layer of the multi-level collaborative control unit, including the following steps: Set the wind and solar power output curves for the new energy power station model to ensure that the maximum wind and solar power output is above the preset percentage of the rated power. The station control layer sequentially issues active power control commands to the new energy power station model. The active power control commands of the new energy power station model are multiple rated power percentages that first increase in a step and then decrease in a step. The duration of each rated power percentage is longer than the preset duration of the active power control command of the new energy power station model.

8. The method as described in claim 6, characterized in that, If the energy storage power station model is to be tested, the charging and discharging mode of the energy storage power station model is set, and the active power control command of the energy storage power station model is generated through the station control layer, including the following steps: When the energy storage power station model is set to discharge mode, the active power control command of the energy storage power station model discharge mode is issued sequentially through the station control layer. The active power control command of the energy storage power station model discharge mode is a number of rated power percentages that first increase in a step and then decrease in a step. The duration of each rated power percentage is longer than the preset duration of the active power control command of the energy storage power station model. When the energy storage power station model is set to charging mode, the station control layer sequentially issues active power control commands for the charging mode of the energy storage power station model. The active power control commands for the charging mode of the energy storage power station model are multiple negative values ​​of rated power percentage that first increase in a step and then decrease in a step. The duration of each negative value of rated power percentage is longer than the preset duration of the active power control command for the energy storage power station model.

9. The method as described in claim 6, characterized in that, The process of setting initial values ​​for the short-circuit ratio and impedance ratio parameters of the power grid where the new energy and energy storage power station model is located, and setting the SVG to a constant reactive power control mode or a constant voltage control mode, and generating reactive power control commands for reactive power control or voltage control through the station control layer, includes the following steps: If it is the SVG reactive power control capability test in the reactive power voltage control capability test, then set the initial values ​​of the short-circuit ratio and impedance ratio parameters; Set the SVG to constant reactive power control mode; The station control layer sequentially issues reactive power control commands, which are first incremented and then decremented by a percentage of the rated power. The duration of each percentage of the rated power is longer than the preset reactive power control duration. If the test is for the SVG voltage control capability in the reactive voltage control capability test, then set the SVG to constant voltage control mode. The station control layer sequentially issues voltage-controlled reactive power control commands, which are voltage values ​​that are first increased stepwise, then decreased stepwise, and then increased stepwise again. The duration of each voltage value is longer than the preset voltage control duration.

10. The method as described in claim 6, characterized in that, If the State of Charge (SOC) of the energy storage power station model is to be tested under non-limiting operating conditions, the frequency sequence of the non-limiting operating conditions of the power grid where the new energy source and the energy storage power station model are located is set, and the non-limiting operating condition power control command is generated through the co-control layer of the multi-level collaborative control unit, including the following steps: The frequency sequence of the non-extreme operating condition is set as a frequency step disturbance of a preset frequency, and the state of the preset frequency must be maintained for more than a preset duration, and the step size of the frequency sequence is not higher than a preset value. The co-control layer generates a non-limiting power control command, which initiates a frequency step disturbance according to the frequency sequence of the non-limiting operating condition.

11. The method as described in claim 6, characterized in that, The process of processing and calculating the grid connection point and the operating status of each unit in the new energy and energy storage power station model through the online monitoring unit of the platform includes the following steps: The current power control performance test requirement is that, when testing the active power control capability, the online monitoring unit is used to process and calculate the voltage, current, power control command, voltage and current sampling rate, and power control command sampling rate at the grid connection point of the new energy and energy storage power station model based on the secondary voltage and current. The current power control performance test requirement is to test the reactive voltage control capability. Based on the secondary voltage and current, the online monitoring unit is used to process and calculate the grid connection point voltage, current, power control command, voltage control command, voltage and current sampling rate, power control command sampling rate, and voltage control command sampling rate of the new energy and energy storage power station model. The current power control performance test requirement is to process and calculate the voltage, current, voltage and current sampling rate, frequency information of the test signal, and primary frequency control parameters of the grid connection point of the new energy and energy storage power station model based on the secondary voltage and current using the online monitoring unit.

12. The method as described in claim 11, characterized in that, Based on the grid connection point and the operating status of each unit, the power data and control data of the new energy and energy storage power station model are processed and calculated by the online monitoring unit within a set time period to obtain the power control performance test results of the new energy and energy storage power station model. The specific steps include: The current power control performance test requirement is to test the active power control capability. Based on the voltage, current, power control command, voltage and current sampling rate and power control command sampling rate of the grid connection point of the new energy and energy storage power station model, within the preset active power control capability test monitoring period, the online monitoring unit is used to calculate the average active power of the grid connection point of the new energy and energy storage power station model, the response time and control accuracy of the active power control of the new energy and energy storage power station model. When the current power control performance test requirement is to test the reactive power and voltage control capability, if the SVG is in constant reactive power control mode, based on the SVG grid connection point voltage, current, power control command, voltage and current sampling rate, and power control command sampling rate, within the preset reactive power and voltage control capability test monitoring period, the online monitoring unit is used to calculate the average reactive power of the SVG grid connection point, the response time of the SVG reactive power control, and the control accuracy. If the SVG is in constant voltage control mode, based on the SVG grid connection point voltage, current, voltage control command, voltage and current sampling rate, and voltage control command sampling rate, the online monitoring unit is used to calculate the response time of the SVG voltage control and the control accuracy. When the current power control performance test requirement is the primary frequency regulation capability test, if the state of charge (SOC) of the energy storage power station model is in a non-extreme operating condition, based on the voltage, current, voltage and current sampling rate, frequency information of the test signal, and primary frequency regulation control parameters of the grid connection point of the new energy and energy storage power station model, within the preset primary frequency regulation capability test monitoring period, the online monitoring unit is used to calculate the actual active power and theoretical active power of the grid connection point of the new energy and energy storage power station model, as well as the primary frequency regulation response lag time, rise time, adjustment time, and control deviation of the new energy and energy storage power station model; The results of the active power control capability test, reactive power voltage control capability test, and primary frequency regulation capability test are used as the power control performance test results of the new energy and energy storage power station model.

13. A power control simulation and testing system for new energy and energy storage power stations, characterized in that, include: Instruction generation module: Based on the current power control performance testing requirements, it generates corresponding power control instructions through a multi-level collaborative control unit; wherein, the multi-level collaborative control unit communicates between multiple levels via a multi-machine communication unit; The instruction generation module is specifically used for: when the current power control performance test requirement is active power control capability test, if the test is conducted on a new energy power station model, setting the initial values ​​of the wind and solar power output curves of the new energy power station model, and generating active power control instructions for the new energy power station model through the station control layer of the multi-level collaborative control unit; if the test is conducted on an energy storage power station model, setting the charging and discharging mode of the energy storage power station model, and generating active power control instructions for the energy storage power station model through the station control layer; when the current power control performance test requirement is reactive power and voltage control capability test, setting the initial values ​​of the short-circuit ratio and impedance ratio parameters of the power grid where the new energy and energy storage power station models are located, and setting the SVG to be in constant reactive power control mode or constant voltage control mode, and generating reactive power control instructions through the station control layer. The reactive power control command is either a control command or a voltage-controlled reactive power control command; the SVG is included in the new energy and energy storage power station model; when the current power control performance test requirement is a primary frequency regulation capability test, if the non-limiting operating condition of the state of charge (SOC) of the energy storage power station model is tested, the frequency sequence of the non-limiting operating condition of the power grid where the new energy and energy storage power station model is located is set, and the non-limiting operating condition power control command is generated through the co-control layer of the multi-level collaborative control unit; if the limiting operating condition of the SOC of the energy storage power station model is tested, the initial operating power of the new energy power station model is set through the station control layer, and the frequency sequence of the limiting operating condition of the power grid where the new energy and energy storage power station model is located is set, and the limiting operating condition power control command is generated through the co-control layer. Performance testing module: Generates several simulation models through the real-time grid-source situation simulation unit, instructs each simulation model to run the simulation based on the power control command, and performs power control performance tests on each simulation model to obtain analog small signals; the simulation models include: new energy and energy storage power station models and grid models; Signal conversion module: Converts the analog small signal into secondary voltage and current through a secondary measurement unit; Result acquisition module: Based on the secondary voltage and current, the online monitoring unit processes and calculates the grid connection point and the operating status of each unit in the new energy and energy storage power station model; based on the grid connection point and the operating status of each unit, the online monitoring unit processes and calculates the power data and control data of the new energy and energy storage power station model within a set time period to obtain the power control performance test results of the new energy and energy storage power station model.

14. An electronic device, characterized in that, include: At least one processor and memory; The memory and processor are connected via a bus; The memory is used to store one or more programs; When the one or more programs are executed by the at least one processor, a power control simulation test method for new energy and energy storage power stations as described in any one of claims 6 to 12 is implemented.

15. A readable storage medium, characterized in that, It contains an execution program, which, when executed, implements a power control simulation test method for new energy and energy storage power stations as described in any one of claims 6 to 12.

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