Flywheel grid-connected voltage frequency active support test system, method, equipment and medium

Abstract

The invention provides a flywheel grid-connected voltage frequency active support test system, method, device and medium, and belongs to the technical field of flywheel energy storage, the system comprises a sampling module, a simulation server, a power grid simulator, a flywheel power controller and a flywheel body; the simulation server is used for acquiring an analog quantity signal of the regional power grid model; the analog quantity signal of the regional power grid model is updated, and the updated analog quantity signal is sent to the power grid simulator; the power grid simulator is used for generating an updated actual output signal according to the updated analog quantity signal and sending the updated actual output signal to the flywheel power controller; and the flywheel power controller is used for sending a control signal to the flywheel body based on the updated actual output signal, and testing the active supporting capability of the flywheel body to the power grid when the power grid fluctuates. Therefore, the test cost can be greatly saved, and the risks of switch tube damage, hardware loop damage and the like in the development and debugging process are reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of flywheel energy storage, and in particular relates to a flywheel grid-connected voltage and frequency active support test system, method, equipment and medium. Background Art

[0002] With the breakthrough of core technology, the development of flywheel technology shows a trend of large-scale development, playing an important role in improving the stability of power systems. For example, direct inertia flywheels are developing towards ultra-high inertia, large capacity, and high overload technology; high-speed advanced flywheel technology is developing towards a technical route with inherent safety, low rotor loss, high power per unit, and large energy storage. At present, in response to the risks of insufficient inertia and transient frequency / voltage instability in new power systems, based on the dynamic response characteristics of the output power of the flywheel array port, a method for optimizing the inertia, damping and other parameters of the flywheel array control system is proposed, breaking through the key technology of active frequency / voltage support of multiple types of flywheel arrays, and effectively improving the active support capability of the flywheel array for the power grid.

[0003] The existing technology tests the flywheel's active support capability for the power grid by directly connecting the flywheel array to the grid for testing. This testing method has the problems of huge testing cost, unreasonable testing method, unsafe testing process, impact on the power grid, and influence on stability. Summary of the invention

[0004] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a flywheel array grid-connected voltage and frequency active support test system, the system comprising: a sampling module, a simulation server, a power grid simulator, a flywheel power controller and a flywheel body; the sampling module is connected to the simulation server and the power grid simulator respectively, the power grid simulator is also connected to the flywheel power controller, and the flywheel power controller is connected to the flywheel body;

[0005] A simulation server is used to build a regional power grid model based on the actual power grid, connect the flywheel body to the regional power grid model through the flywheel power controller, and obtain the analog signal of the regional power grid model; when a power grid fluctuation signal for the regional power grid model is identified, the analog signal of the regional power grid model is updated, and the updated analog signal is sent to the power grid simulator; it is also used to obtain the updated actual output signal of the regional power grid model from the sampling module, and convert the updated actual output signal into an analog signal and send it to the power grid simulator again to achieve closed-loop control;

[0006] A power grid simulator, used for generating an updated actual output signal according to the updated analog quantity signal, and sending the updated actual output signal to the flywheel power controller;

[0007] A sampling module, used for collecting updated actual output signals from the power grid simulator and sending the updated actual output signals to the simulation server;

[0008] The flywheel power controller is used to send a control signal to the flywheel body based on the updated actual output signal to test the flywheel body's active support capability for the power grid when the power grid fluctuates.

[0009] Preferably, the power grid fluctuation signal includes a power grid voltage fluctuation signal.

[0010] The simulation server is also used to:

[0011] A fault grounding resistor is inserted at the grid connection point where the flywheel body is connected to the regional power grid model to create a short circuit fault, and the grid voltage fluctuation signal is input into the regional power grid model.

[0012] Preferably, the power grid fluctuation signal includes a power grid frequency fluctuation signal.

[0013] The simulation server is also used to:

[0014] At the grid connection point where the flywheel body is connected to the regional power grid model, the grid frequency fluctuation signal is input into the regional power grid model by switching on and off the load or adjusting the load size.

[0015] Preferably, the power grid simulator is specifically used for:

[0016] The updated analog signal is amplified to generate an updated actual output signal of the regional power grid model.

[0017] Preferably, the simulation server is specifically used for:

[0018] Collecting regional power grid information of the actual power grid, the regional power grid information including one or more of topology parameters, transmission line parameters, transformer parameters, load parameters or power plant output power parameters;

[0019] Build a regional power grid model based on regional power grid information.

[0020] Preferably, the system further comprises a transformer;

[0021] One end of the transformer is connected to the power grid simulator, and the other end is connected to the actual power grid;

[0022] The transformer is used to isolate the grid simulator from the actual grid and reduce the harmonics generated by the flywheel body.

[0023] Preferably, the flywheel body comprises a direct mass flywheel and / or a high speed advanced flywheel.

[0024] Based on the same inventive concept, the present invention also provides a flywheel grid-connected voltage and frequency active support test method, comprising:

[0025] A regional power grid model is built based on the actual power grid through a simulation server, and the flywheel body is connected to the regional power grid model through a flywheel power controller to obtain analog signals of the regional power grid model;

[0026] When a power grid fluctuation signal for the regional power grid model is identified, an analog quantity signal of the regional power grid model is updated, and the updated analog quantity signal is sent to the power grid simulator;

[0027] generating an updated actual output signal according to the updated analog signal through a power grid simulator, and sending the updated actual output signal to a flywheel power controller;

[0028] The flywheel power controller sends a control signal to the flywheel body based on the updated actual output signal to test the flywheel body's active support capability for the grid when the grid fluctuates;

[0029] And obtain the actual output signal after the regional power grid model is updated through the sampling module, send the updated actual output signal to the simulation server, convert the updated actual output signal into an analog signal through the simulation server and send it to the power grid simulator again to achieve closed-loop control.

[0030] Preferably, the power grid fluctuation signal includes a power grid voltage fluctuation signal, and the method further includes:

[0031] The grid frequency fluctuation signal is input into the regional grid model by switching on or off the load or adjusting the load size at the grid connection point where the flywheel body is connected to the regional grid model through the simulation server.

[0032] Preferably, the power grid fluctuation signal includes a power grid frequency fluctuation signal, and the method further includes:

[0033] The grid frequency fluctuation signal is input into the regional grid model by switching on or off the load or adjusting the load size at the grid connection point where the flywheel body is connected to the regional grid model through the simulation server.

[0034] Preferably, generating an updated actual output signal according to the updated analog signal by a power grid simulator includes:

[0035] The updated analog signal is amplified to generate an updated actual output signal of the regional power grid model.

[0036] Preferably, building a regional power grid model includes:

[0037] Collecting regional power grid information of the actual power grid, the regional power grid information including one or more of topology parameters, transmission line parameters, transformer parameters, load parameters or power plant output power parameters;

[0038] Build a regional power grid model based on regional power grid information.

[0039] Preferably, the method further comprises

[0040] One end of the transformer is connected to the power grid simulator, and the other end is connected to the actual power grid;

[0041] The grid simulator is isolated from the actual grid by a transformer to reduce the harmonics generated by the flywheel body.

[0042] Preferably, the flywheel body comprises a direct mass flywheel and / or a high speed advanced flywheel.

[0043] Based on the same inventive concept, the present invention also provides an electronic device, comprising: at least one processor and a memory; the memory and the processor are connected via a bus;

[0044] The memory is used to store one or more programs;

[0045] When the one or more programs are executed by the at least one processor, a flywheel grid-connected voltage and frequency active support test method as described above is implemented.

[0046] Based on the same inventive concept, the present invention also provides a readable storage medium having an execution program stored thereon. When the execution program is executed, a flywheel grid-connected voltage and frequency active support test method as described above is implemented.

[0047] Compared with the closest prior art, the present invention has the following beneficial effects:

[0048] The present invention provides a flywheel array grid-connected voltage and frequency active support test system, the system includes: a sampling module, a simulation server, a power grid simulator, a flywheel power controller and a flywheel body; the sampling module is connected to the simulation server and the power grid simulator respectively, the power grid simulator is also connected to the flywheel power controller, and the flywheel power controller is connected to the flywheel body; the simulation server is used to build a regional power grid model based on the actual power grid, connect the flywheel body to the regional power grid model through the flywheel power controller, and obtain the analog signal of the regional power grid model; when the power grid fluctuation signal for the regional power grid model is identified, the analog signal of the regional power grid model is updated, and the updated analog signal is sent to The power grid simulator is also used to obtain the updated actual output signal of the regional power grid model from the sampling module, and convert the updated actual output signal into an analog signal and send it to the power grid simulator again to achieve closed-loop control; the power grid simulator is used to generate an updated actual output signal according to the updated analog signal, and send the updated actual output signal to the flywheel power controller; the sampling module is used to collect the updated actual output signal from the power grid simulator and send the updated actual output signal to the simulation server; the flywheel power controller is used to send a control signal to the flywheel body based on the updated actual output signal to test the flywheel body's active support capability for the power grid when the power grid fluctuates. In this way, from an economic point of view, algorithm verification and functional testing can be carried out by simulating the working conditions of the flywheel grid connection, which can greatly save the testing cost; from a safety point of view, the safety of the overcurrent protection function test of the power grid simulator output is guaranteed, and this test method can significantly shorten the development cycle of the flywheel body voltage frequency active support control algorithm and reduce the risks of switch tube damage and hardware circuit damage during the development and debugging process. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 A structural diagram of a flywheel grid-connected voltage and frequency active support test system is provided for the present invention;

[0050] Figure 2 A test simulation diagram of the flywheel body's active support capability for the grid voltage when the grid voltage drops provided by the present invention;

[0051] Figure 3 A test simulation diagram of the flywheel body's active support capability for the grid voltage when the grid voltage rises provided by the present invention;

[0052] Figure 4 A test simulation diagram of the flywheel body's active support capability for the grid frequency when the grid frequency rises provided by the present invention;

[0053] Figure 5 A test simulation diagram of the flywheel body's active support capability for the grid frequency when the grid frequency drops provided by the present invention;

[0054] Figure 6 A schematic flow chart of a flywheel grid-connected voltage and frequency active support test method provided by the present invention;

[0055] Figure 7 A schematic diagram of an electronic device provided by the present invention. DETAILED DESCRIPTION

[0056] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0057] Embodiment 1:

[0058] The present invention provides a flywheel grid-connected voltage and frequency active support test system 100, specifically, Figure 1 The structural diagram of the flywheel grid-connected voltage and frequency active support test system provided by the embodiment of the present invention includes:

[0059] The system includes: a sampling module 103, a simulation server 101, a power grid simulator 102, a flywheel power controller 104 and a flywheel body 105; the sampling module 103 is connected to the simulation server 101 and the power grid simulator 102 respectively, the power grid simulator 102 is also connected to the flywheel power controller 104, and the flywheel power controller 104 is connected to the flywheel body 105;

[0060] The simulation server 101 is used to build a regional power grid model based on the actual power grid, connect the flywheel body 105 to the regional power grid model through the flywheel power controller 104, and obtain the analog signal of the regional power grid model; when the power grid fluctuation signal for the regional power grid model is identified, the analog signal of the regional power grid model is updated, and the updated analog signal is sent to the power grid simulator 102; it is also used to obtain the updated actual output signal of the regional power grid model from the sampling module 103, and convert the updated actual output signal into an analog signal and send it to the power grid simulator 102 again to achieve closed-loop control;

[0061] The power grid simulator 102 is used to generate an updated actual output signal according to the updated analog signal, and send the updated actual output signal to the flywheel power controller 104;

[0062] The sampling module 103 is used to collect the updated actual output signal from the power grid simulator 102 and send the updated actual output signal to the simulation server 101;

[0063] The flywheel power controller 104 is used to send a control signal to the flywheel body 105 based on the updated actual output signal, so as to test the active support capability of the flywheel body 105 to the power grid when the power grid fluctuates.

[0064] Specifically, in the embodiment of the present invention, the flywheel grid-connected voltage and frequency active support means that when the grid voltage or frequency drops or fluctuates, the flywheel provides inertia support to the system, suppresses the voltage or frequency fluctuations, and restores the voltage or frequency to a relatively stable and reliable range.

[0065] Preferably, the flywheel body comprises a direct mass flywheel and / or a high speed advanced flywheel.

[0066] The closed-loop system composed of sampling modules, simulation servers and power grid simulators is used to simulate the signal fluctuations of the actual power grid, that is, to create such working conditions and build a test platform to simulate the environment when the flywheel is connected to the grid. When the signal fluctuation changes, the flywheel outputs through the flywheel power controller, and then obtains the actual power flow, voltage or frequency changes of the power grid when the flywheel outputs, so as to carry out the active support capacity test of the flywheel body connected to the grid for the voltage and frequency of the grid when the grid voltage or frequency fluctuates.

[0067] according to Figure 1 Topology building experimental platform, build a regional power grid model in the simulation server. The process of building a regional power grid model includes: building a regional power grid model based on one or more of the collected power grid topology parameters, transmission line parameters, transformer parameters, load parameters or power plant output power parameters. At the same time, you can also import a provincial power grid model or a prefecture-level power grid model, combine the provincial power grid model or the prefecture-level power grid model with the regional power grid model, and generate a combined regional power grid model.

[0068] After building the regional power grid model, connect the analog output module of the simulation server to the power grid simulator, determine the regional power grid model node in the simulation server as the grid connection point in the test, obtain the analog signal of the regional power grid model, and use the analog signal output by the simulation server to control the actual output signal of the power grid simulator.

[0069] Among them, the power grid simulator is a device for adjusting the output of the AC port, and the output voltage and frequency of the port can be adjusted by setting. In the present invention, the analog signal output by the simulation server is used to control the output of the power grid simulator, which is similar to the effect of an operational amplifier and a power amplifier. Specifically, the analog signal output by the simulation server is amplified to generate the actual output signal of the regional power grid model.

[0070] Then put the flywheel body and sampling module in Figure 1Topology access test platform. The actual output signal of the power grid simulator will be input into the simulation server through the sampling module. The simulation server will calculate the regional power grid model of the simulation server according to the actual output signal sampled, and adjust the output of the power grid simulator in real time, finally forming a control closed loop.

[0071] The flywheel bodies in the test system can be 1-2 flywheel bodies, and pure digital simulation can be performed to simulate the grid connection of a large number of flywheel arrays.

[0072] The simulation server, power grid simulator and sampling module form a closed-loop control. Specifically, the simulation server builds a regional power grid model based on the actual power grid, connects the flywheel body to the regional power grid model through the flywheel power controller, and obtains the analog signal of the regional power grid model; the power grid simulator obtains the analog signal of the regional power grid model from the simulation server, and generates an actual output signal from the analog signal; the sampling module collects the actual output signal from the power grid simulator, and sends the actual output signal to the simulation server; the simulation server then generates an analog signal based on the actual output signal to form a control closed loop.

[0073] When a power grid fluctuation signal for the regional power grid model is identified, the analog signal of the regional power grid model is updated and the updated analog signal is sent to the power grid simulator; the power grid simulator generates an updated actual output signal based on the updated analog signal and sends the updated actual output signal to the flywheel power controller; then, the flywheel power controller sends a control signal to the flywheel body based on the updated actual output signal to test the flywheel body's active support capability for the power grid when the power grid fluctuates. At the same time, the power grid simulator sends the updated actual output signal to the simulation server, converts the updated actual output signal into an analog signal and sends it to the power grid simulator again to achieve closed-loop control.

[0074] In general, the closed-loop output control method formed by the simulation server, power grid simulator and sampling module simulates the actual power grid signal fluctuations and the actual power flow, voltage and frequency changes of the power grid when the flywheel is outputting. It avoids the power grid simulator as an uncontrolled power source to open the loop to create power grid signal fluctuations, maintain a fixed signal output, and cause overcurrent faults when the flywheel is outputting.

[0075] In an embodiment of the present invention, the power grid fluctuation signal includes a power grid voltage fluctuation signal. When the power grid fluctuation signal is a power grid voltage fluctuation signal, a fault grounding resistor can be input at the grid connection point where the flywheel body is connected to the regional power grid model through a simulation server to create a short circuit fault, and the power grid voltage fluctuation signal is input to the regional power grid model. After the power grid voltage fluctuation signal is input, the flywheel body provides active support to the power grid through the flywheel power controller, and the active support capability of the flywheel body to the power grid voltage is tested.

[0076] In an embodiment of the present invention, the power grid fluctuation signal may also include a power grid frequency fluctuation signal. When the power grid fluctuation signal is a power grid frequency fluctuation signal, the power grid frequency fluctuation signal may be input to the regional power grid model by switching on or off loads or adjusting the load size at the grid connection point where the flywheel body is connected to the regional power grid model through the simulation server. After the power grid frequency fluctuation signal is input, the flywheel body provides active support to the power grid through the flywheel power controller, and the active support capability of the flywheel body to the power grid frequency is tested.

[0077] Figure 2-Figure 3 This is a test simulation diagram of the flywheel body's active support capability for the grid voltage when the grid voltage fluctuates provided by the present invention. Figure 2 This is a test simulation diagram of the flywheel's active support capability for the grid voltage when the grid voltage drops. Figure 3 This is a test simulation diagram of the flywheel body's active support capability for the grid voltage when the grid voltage rises.

[0078] Figure 4-Figure 5 This is a test simulation diagram of the flywheel body's active support capability for the grid frequency when the grid frequency fluctuates provided by the present invention. Figure 4 This is a test simulation diagram of the flywheel's active support capability for the grid frequency when the grid frequency rises. Figure 5 This is a test simulation diagram of the flywheel body's active support capability for the grid frequency when the grid frequency drops.

[0079] It can be seen from the test results that when the grid voltage or grid frequency fluctuates, the flywheel body can provide active support for the grid. The closed-loop control system composed of a simulation server, a grid simulator and a sampling module can simulate the operating conditions of the flywheel when connected to the grid in the actual grid.

[0080] Preferably, in order to reduce the harmonics generated by the flywheel response and the impact on the actual power grid, the flywheel grid-connected voltage frequency active support test system is isolated from the actual power grid through a transformer. Specifically, one end of the transformer is connected to the power grid simulator, and the other end is connected to the actual power grid; the power grid simulator is isolated from the actual power grid to reduce the harmonics generated by the flywheel body.

[0081] The flywheel grid-connected voltage and frequency active support test system provided by the present invention is aimed at the problems of huge testing cost, unsafe testing process, impact on the grid and stability when directly connecting the flywheel array to the grid and testing the active support effect of the flywheel array on the grid in the prior art. A control closed loop is formed by a grid simulator, a simulation server and a sampling module to simulate the working conditions when the flywheel is connected to the grid, and the frequency fluctuation of the grid connection point is achieved by switching on and off the load or adjusting the load size, and the voltage fluctuation of the grid connection point is achieved by creating a short circuit fault, so as to carry out the active support ability test of the flywheel body connected to the grid for the grid voltage and frequency when the grid voltage and frequency fluctuate. The test method proposed by the present invention can be widely used in the test of the active support ability of the flywheel body connected to the grid voltage and frequency.

[0082] From the perspective of economy, algorithm verification and functional testing by simulating the working conditions of the flywheel body connected to the grid can greatly save testing costs; from the perspective of safety, due to the overcurrent protection of the grid simulator output, the safety of the functional test can be guaranteed, significantly shortening the switching cycle of the flywheel body voltage and frequency active support control algorithm, and reducing the risk of switch tube damage and hardware circuit damage during the test method debugging process; from the perspective of the impact on the actual power grid, the flywheel grid-connected voltage and frequency active support test system provided by the present invention is isolated from the actual power grid by a transformer, reducing the harmonics generated by the flywheel response and reducing the impact on the power grid; from the perspective of operation, the present invention simplifies the complex operation process, has a friendly human-machine interface, can issue control instructions in real time, can intuitively monitor the switch quantity, analog signal and fault alarm information in the flywheel grid-connected voltage and frequency active support test system in real time, and facilitates the observation of data and waveform curves during the operation of the flywheel grid-connected voltage and frequency active support test system, and the monitoring system records important variables when the flywheel grid-connected voltage and frequency active support test system starts running, which is convenient for fault analysis.

[0083] At the same time, the flywheel grid-connected voltage and frequency active support test system provided by the present invention has a core structure including a sampling module, a simulation server, a power grid simulator, a flywheel power controller and a flywheel body, and the topology between the core structures is simple, and the test protection functions are complete, which is convenient for developers to debug and helps to improve the safety and reliability of weak power grid operation.

[0084] Embodiment 2:

[0085] Based on the same inventive concept, the present invention also provides a flywheel grid-connected voltage and frequency active support test method, specifically, Figure 6 A flow chart of a flywheel grid-connected voltage and frequency active support test method provided by an embodiment of the present invention includes the following steps as shown in the figure:

[0086] S601: Building a regional power grid model based on the actual power grid through a simulation server, connecting the flywheel body to the regional power grid model through a flywheel power controller, and obtaining an analog signal of the regional power grid model;

[0087] S602: When a power grid fluctuation signal for the regional power grid model is identified, an analog quantity signal of the regional power grid model is updated, and the updated analog quantity signal is sent to a power grid simulator;

[0088] S603: Generate an updated actual output signal according to the updated analog signal through a power grid simulator, and send the updated actual output signal to a flywheel power controller;

[0089] S604: sending a control signal to the flywheel body based on the updated actual output signal through the flywheel power controller to test the active support capability of the flywheel body for the power grid when the power grid fluctuates;

[0090] S605: Obtain the actual output signal after the regional power grid model is updated through the sampling module, send the updated actual output signal to the simulation server, convert the updated actual output signal into an analog signal through the simulation server and send it to the power grid simulator again to achieve closed-loop control.

[0091] Preferably, the power grid fluctuation signal includes a power grid voltage fluctuation signal, and the method further includes:

[0092] The grid frequency fluctuation signal is input into the regional grid model by switching on or off the load or adjusting the load size at the grid connection point where the flywheel body is connected to the regional grid model through the simulation server.

[0093] Preferably, the power grid fluctuation signal includes a power grid frequency fluctuation signal, and the method further includes:

[0094] The grid frequency fluctuation signal is input into the regional grid model by switching on or off the load or adjusting the load size at the grid connection point where the flywheel body is connected to the regional grid model through the simulation server.

[0095] Preferably, generating an updated actual output signal according to the updated analog signal by a power grid simulator includes:

[0096] The updated analog signal is amplified to generate an updated actual output signal of the regional power grid model.

[0097] Preferably, building a regional power grid model includes:

[0098] Collecting regional power grid information of the actual power grid, the regional power grid information including one or more of topology parameters, transmission line parameters, transformer parameters, load parameters or power plant output power parameters;

[0099] Build a regional power grid model based on regional power grid information.

[0100] Preferably, the method further comprises:

[0101] One end of the transformer is connected to the power grid simulator, and the other end is connected to the actual power grid;

[0102] The grid simulator is isolated from the actual grid by a transformer to reduce the harmonics generated by the flywheel body.

[0103] Preferably, the flywheel body comprises a direct mass flywheel and / or a high speed advanced flywheel.

[0104] Embodiment 3:

[0105] Based on the same inventive concept, Figure 7 As shown, the present invention also provides an electronic device, which may be a computer device, a single-chip device, an intelligent mobile device, etc. The electronic device in this embodiment may include a processor, a memory, a transceiver component, etc. The memory, the processor, and the transceiver component are connected via a bus; the memory may be used to store an execution program, and an exemplary execution program may include instructions; the processor is used to execute the instructions stored in the memory. The memory may also be used to store data, which may be called and / or modified when the instructions are executed.

[0106] The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, which is suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions in a readable storage medium to implement the corresponding method flow or corresponding functions, so as to implement the steps of a flywheel grid-connected voltage and frequency active support test method in the above embodiment.

[0107] Embodiment 4:

[0108] Based on the same inventive concept, the present invention also provides a readable storage medium, specifically an electronic device readable storage medium (Memory), which is a memory device in the electronic device for storing programs and data. It can be understood that the readable storage medium here can include both the built-in storage medium in the electronic device and the extended storage medium supported by the electronic device. The storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and these instructions can be one or more execution programs (including program codes). It should be noted that the storage medium here can be a high-speed RAM memory or a non-volatile memory (non-volatile memory), such as at least one disk storage. The processor can load and execute one or more instructions stored in the storage medium to implement the steps of a flywheel grid-connected voltage and frequency active support test method in the above embodiment.

[0109] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented 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.

[0110] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0111] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1A function specified in one or more boxes.

[0112] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit its protection scope. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that after reading the present invention, those skilled in the art 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 to be approved.

Claims

1. A flywheel grid-connected voltage and frequency active support test system, characterized in that: The system includes a sampling module, a simulation server, a power grid simulator, a flywheel power controller and a flywheel body; the sampling module is connected to the simulation server and the power grid simulator respectively, the power grid simulator is also connected to the flywheel power controller, and the flywheel power controller is connected to the flywheel body; The simulation server is used to build a regional power grid model based on the actual power grid, connect the flywheel body to the regional power grid model through the flywheel power controller, and obtain the analog signal of the regional power grid model; when a power grid fluctuation signal for the regional power grid model is identified, the analog signal of the regional power grid model is updated, and the updated analog signal is sent to the power grid simulator; it is also used to obtain the updated actual output signal of the regional power grid model from the sampling module, and convert the updated actual output signal into an analog signal and send it to the power grid simulator again to achieve closed-loop control; The power grid simulator is used to generate an updated actual output signal according to the updated analog signal, and send the updated actual output signal to the flywheel power controller; The sampling module is used to collect the updated actual output signal from the power grid simulator and send the updated actual output signal to the simulation server; The flywheel power controller is used to send a control signal to the flywheel body based on the updated actual output signal to test the active support capability of the flywheel body to the power grid when the power grid fluctuates.

2. The system according to claim 1, characterized in that The power grid fluctuation signal includes a power grid voltage fluctuation signal, and the simulation server is further used for: A fault grounding resistor is input at the grid connection point where the flywheel body is connected to the regional power grid model to create a short circuit fault, and the power grid voltage fluctuation signal is input to the regional power grid model.

3. The system according to claim 1, characterized in that The power grid fluctuation signal includes a power grid frequency fluctuation signal, and the simulation server is further used for: The grid frequency fluctuation signal is input into the regional grid model by switching on and off the load or adjusting the load size at the grid connection point where the flywheel body is connected to the regional grid model.

4. The system according to claim 1, characterized in that The power grid simulator is specifically used for: The updated analog signal is amplified to generate an updated actual output signal of the regional power grid model.

5. The system according to claim 1, characterized in that The simulation server is specifically used for: Collecting regional power grid information of the actual power grid, wherein the regional power grid information includes one or more of topology parameters, transmission line parameters, transformer parameters, load parameters, or power plant output power parameters; A regional power grid model is constructed according to the regional power grid information.

6. The system according to claim 1, characterized in that The system further comprises a transformer; one end of the transformer is connected to the power grid simulator, and the other end of the transformer is connected to the actual power grid; The transformer is used to isolate the power grid simulator from the actual power grid and reduce the harmonics generated by the flywheel body.

7. The system according to claim 1, characterized in that The flywheel body comprises a direct inertia flywheel and / or a high speed advanced flywheel.

8. A flywheel grid-connected voltage and frequency active support test method, characterized in that: include: A regional power grid model is built based on the actual power grid through a simulation server, the flywheel body is connected to the regional power grid model through a flywheel power controller, and an analog signal of the regional power grid model is obtained; When a power grid fluctuation signal for the regional power grid model is identified, an analog quantity signal of the regional power grid model is updated, and the updated analog quantity signal is sent to the power grid simulator; Generate an updated actual output signal according to the updated analog signal by the power grid simulator, and send the updated actual output signal to the flywheel power controller; Sending a control signal to the flywheel body based on the updated actual output signal by the flywheel power controller to test the active support capability of the flywheel body for the power grid when the power grid fluctuates; And obtain the actual output signal after the regional power grid model is updated through the sampling module, send the updated actual output signal to the simulation server, convert the updated actual output signal into an analog signal through the simulation server and send it to the power grid simulator again to achieve closed-loop control.

9. An electronic device, characterized in that: include: at least one processor and memory; 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, the flywheel grid-connected voltage and frequency active support test method as claimed in claim 8 is implemented.

10. A readable storage medium, characterized in that: An execution program is stored thereon, and when the execution program is executed, the flywheel grid-connected voltage and frequency active support test method as claimed in claim 8 is implemented.

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