Grid-connected evaluation method, device and equipment for electric vehicle charging station and storage medium

Abstract

The invention discloses a grid-connected evaluation method, device and equipment for an electric vehicle charging station and a storage medium, which are used for solving the technical problem of poor accuracy and reliability of grid-connected simulation of the existing electric vehicle charging station. The method comprises the following steps: acquiring a first power system parameter of an electric vehicle charging station; acquiring a second power system parameter of the electric vehicle charging station at a grid-connected point in the power system; constructing an electric vehicle charging station model by adopting the first power system parameters; constructing a power system model by adopting the second power system parameters; constructing a grid-connected simulation model by adopting the electric vehicle charging station model and the power system model; running the grid-connected simulation model in a real-time digital simulation system to obtain a simulation result; and generating an influence evaluation report of grid connection of the electric vehicle charging station on the power system according to the simulation result.

Description

Technical Field

[0001] The present invention relates to the technical field of power system simulation, and in particular to a method, device, equipment and storage medium for evaluating the grid connection of an electric vehicle charging station. Background Art

[0002] With the popularization of electric vehicles and the rapid construction of electric vehicle charging stations, the operation characteristics of the power system after the electric vehicle charging station is connected to the grid have become more complex. As an important power load, the connection of electric vehicle charging stations to the grid will affect the voltage, current, power factor, etc. of the power grid, and in severe cases may even cause problems such as grid voltage fluctuations and harmonic pollution. Therefore, it is of great significance to simulate and analyze the power system after the electric vehicle charging station is connected to the grid and evaluate its impact on the power grid to ensure the safe and stable operation of the power grid.

[0003] At present, the power system is mainly simulated by tools such as real-time digital simulator (RTDS). RTDS is a high-precision power system simulation device that can simulate various dynamic and steady-state characteristics of the power system, including changes in parameters such as voltage, current, and power.

[0004] However, existing RTDS simulation models mainly target traditional power system equipment, such as generators, transformers, and transmission lines, and there is little research on modeling and simulation of new power loads such as electric vehicle charging stations. Summary of the invention

[0005] The present invention provides a method, device, equipment and storage medium for evaluating the grid connection of an electric vehicle charging station, which are used to solve the technical problem that the accuracy and reliability of the existing grid connection simulation of an electric vehicle charging station are poor.

[0006] The present invention provides a method for evaluating the grid connection of an electric vehicle charging station, comprising:

[0007] Collecting first power system parameters of electric vehicle charging stations;

[0008] Collecting a second power system parameter of a grid connection point of the electric vehicle charging station in the power system;

[0009] constructing an electric vehicle charging station model using the first power system parameters;

[0010] constructing a power system model using the second power system parameter;

[0011] The electric vehicle charging station model and the power system model are used to construct a grid-connected simulation model;

[0012] Running the grid-connected simulation model in a real-time digital simulation system to obtain simulation results;

[0013] An impact assessment report of the electric vehicle charging station being connected to the grid on the power system is generated based on the simulation results.

[0014] Optionally, the first power system parameters include charger parameters and battery parameters; the step of using the first power system parameters to construct an electric vehicle charging station model includes:

[0015] Acquire a charging station topology structure of the electric vehicle charging station; the charging station topology structure includes a charger and a battery;

[0016] The first voltage level, the first current level and the power factor of the charger are set according to the charger parameters, and the battery capacity, the charging rate and the discharging rate of the battery are set according to the battery parameters to obtain an electric vehicle charging station model.

[0017] Optionally, the step of constructing a power system model according to the second power system parameter includes:

[0018] Obtaining a power system topology structure of a grid connection point of an electric vehicle charging station in a power system; the topology structure includes a connection mode of multiple power devices;

[0019] Acquire the second voltage level, the second current level and the line impedance of each of the electric power equipment from the second electric power system parameters;

[0020] A corresponding second voltage level, second current level and line impedance are set for each of the electric power equipment to construct an electric power system model.

[0021] Optionally, the step of running the grid-connected simulation model in a real-time digital simulation system to obtain a simulation result includes:

[0022] Get simulation time and simulation step size;

[0023] Based on the simulation time and simulation step size, the grid-connected simulation model is run in a real-time digital simulation system to monitor the operation characteristics of the power system after the electric vehicle charging station is connected to the grid in real time to obtain simulation results.

[0024] The present invention also provides an electric vehicle charging station grid connection evaluation device, comprising:

[0025] A first power system parameter acquisition module, used to acquire first power system parameters of the electric vehicle charging station;

[0026] A second power system parameter acquisition module, used to acquire a second power system parameter of a grid connection point of the electric vehicle charging station in the power system;

[0027] An electric vehicle charging station model building module, used to build an electric vehicle charging station model using the first power system parameters;

[0028] A power system model building module, used to build a power system model using the second power system parameters;

[0029] A grid-connected simulation model construction module, used to construct a grid-connected simulation model using the electric vehicle charging station model and the power system model;

[0030] A simulation module, used for running the grid-connected simulation model in a real-time digital simulation system to obtain simulation results;

[0031] A report generation module is used to generate an evaluation report on the impact of the electric vehicle charging station being connected to the grid on the power system based on the simulation results.

[0032] Optionally, the first power system parameter includes charger parameters and battery parameters; the electric vehicle charging station model building module includes:

[0033] A charging station topology structure acquisition submodule is used to acquire the charging station topology structure of the electric vehicle charging station; the charging station topology structure includes a charger and a battery;

[0034] The electric vehicle charging station model building submodule is used to set the first voltage level, the first current level and the power factor of the charger according to the charger parameters, and to set the battery capacity, the charging rate and the discharging rate of the battery according to the battery parameters to obtain the electric vehicle charging station model.

[0035] Optionally, the power system model building module includes:

[0036] The power system topology acquisition submodule is used to acquire the power system topology of the grid connection point of the electric vehicle charging station in the power system; the topology includes the connection mode of multiple power devices;

[0037] A parameter acquisition submodule, used for acquiring the second voltage level, the second current level and the line impedance of each of the power devices from the second power system parameters;

[0038] The power system model construction submodule is used to set the corresponding second voltage level, second current level and line impedance for each of the power devices to construct a power system model.

[0039] Optionally, the simulation module includes:

[0040] The simulation time and simulation step length acquisition submodule is used to obtain the simulation time and simulation step length;

[0041] The simulation submodule is used to run the grid-connected simulation model in a real-time digital simulation system based on the simulation time and simulation step size, monitor the power system operation characteristics after the electric vehicle charging station is connected to the grid in real time, and obtain simulation results.

[0042] The present invention also provides an electronic device, the device comprising a processor and a memory:

[0043] The memory is used to store program code and transmit the program code to the processor;

[0044] The processor is used to execute the electric vehicle charging station grid connection evaluation method as described in any one of the above items according to the instructions in the program code.

[0045] The present invention also provides a computer-readable storage medium, wherein the computer-readable storage medium is used to store program code, and the program code is used to execute the electric vehicle charging station grid connection evaluation method as described in any one of the above items.

[0046] It can be seen from the above technical scheme that the present invention has the following advantages: the present invention collects the first power system parameters of the electric vehicle charging station; collects the second power system parameters of the grid connection point of the electric vehicle charging station in the power system; uses the first power system parameters to build the electric vehicle charging station model; uses the second power system parameters to build the power system model; uses the electric vehicle charging station model and the power system model to build the grid connection simulation model; runs the grid connection simulation model in a real-time digital simulation system to obtain simulation results; and generates an impact assessment report on the grid connection of the electric vehicle charging station on the power system according to the simulation results. This improves the accuracy and reliability of the grid connection simulation of the electric vehicle charging station. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0048] Figure 1 A flowchart of the steps of a method for evaluating the grid connection of an electric vehicle charging station provided by an embodiment of the present invention;

[0049] Figure 2 A flowchart of a method for evaluating the grid connection of an electric vehicle charging station provided by another embodiment of the present invention;

[0050] Figure 3 A structural block diagram of a grid-connected evaluation device for an electric vehicle charging station provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0051] The embodiments of the present invention provide a method, device, equipment and storage medium for evaluating the grid connection of an electric vehicle charging station, which are used to solve the technical problem that the accuracy and reliability of the existing grid connection simulation of electric vehicle charging stations are poor.

[0052] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] See also Figure 1 , Figure 1 A flowchart of the steps of a method for evaluating the grid connection of an electric vehicle charging station provided by an embodiment of the present invention.

[0054] The present invention provides an electric vehicle charging station grid connection evaluation method, which may specifically include the following steps:

[0055] Step 101, collecting first power system parameters of an electric vehicle charging station;

[0056] An electric vehicle charging station is a site for charging electric vehicles.

[0057] The power system is an electric energy production and consumption system composed of power plants, power transmission and transformation lines, power distribution stations and power consumption. Its function is to convert primary energy in nature into electric energy through power generation devices, and then supply electric energy to various users through transmission, transformation and distribution. To achieve this function, the power system also has corresponding information and control systems at various links and levels to measure, regulate, control, protect, communicate and dispatch the production process of electric energy to ensure that users obtain safe and high-quality electric energy.

[0058] In the embodiment of the present invention, to construct a power system simulation model after the electric vehicle charging station is connected to the grid, a simulation model of the electric vehicle charging station can be first established. The simulation model of the electric vehicle charging station can be constructed by collecting the first power system parameters of the electric vehicle charging station.

[0059] Step 102, collecting a second power system parameter of a grid connection point of the electric vehicle charging station in the power system;

[0060] The grid connection point refers to the connection point where an electric vehicle charging station is connected to the power system.

[0061] In the embodiment of the present invention, to construct a power system simulation model after the electric vehicle charging station is connected to the grid, it is also necessary to construct a power system simulation model at the electric vehicle charging station connection point. The power system simulation model can be realized by collecting the second power system parameters at the connection point in the power system.

[0062] Step 103, constructing an electric vehicle charging station model using the first power system parameter;

[0063] After the first power system parameters of the electric vehicle charging station are collected, the first power system parameters may be used in combination with the actual structure of the electric vehicle charging station to construct an electric vehicle charging station model.

[0064] Step 104, constructing a power system model using the second power system parameter;

[0065] After the second power system parameters at the electric vehicle charging station grid connection point are collected, the second power system parameters can be used in combination with the actual structure at the power system grid connection point to construct a power system model.

[0066] Step 105, constructing a grid-connected simulation model using the electric vehicle charging station model and the power system model;

[0067] After the electric vehicle charging station model and the power system model are constructed, the electric vehicle charging station model and the power system model can be spliced ​​based on the grid connection point to obtain a simulation model of the electric vehicle charging station after grid connection.

[0068] Step 106, running the grid-connected simulation model in the real-time digital simulation system to obtain simulation results;

[0069] Real-Time Digital Simulator (RTDS) is the product of the development of digital simulation technology, computer technology and parallel processing technology. It not only has the characteristics of digital simulation, but more importantly, the adoption of parallel processing technology and the design of specialized hardware ensure the real-time operation and closed-loop testing capability of RTDS, and can complete real-time simulation operation of large-scale power systems at a step size of 50μs.

[0070] In the embodiment of the present invention, the grid-connected simulation model can be run in a real-time digital simulation system to obtain simulation results.

[0071] Step 107, generating an assessment report on the impact of the electric vehicle charging station grid connection on the power system based on the simulation results.

[0072] After obtaining the simulation results of the grid-connected simulation model, the impact of the grid-connected electric vehicle charging station on the voltage, current, power factor and other parameters of the power system, as well as the possible grid voltage fluctuations, harmonic pollution and other problems can be evaluated based on the simulation results. Then, an impact assessment report can be generated based on the evaluation results, and corresponding grid planning, operation and control suggestions can be put forward to ensure the safe and stable operation of the power system.

[0073] The present invention collects the first power system parameters of the electric vehicle charging station; collects the second power system parameters of the grid connection point of the electric vehicle charging station in the power system; uses the first power system parameters to build the electric vehicle charging station model; uses the second power system parameters to build the power system model; uses the electric vehicle charging station model and the power system model to build the grid connection simulation model; runs the grid connection simulation model in a real-time digital simulation system to obtain simulation results; and generates an impact assessment report of the electric vehicle charging station grid connection on the power system according to the simulation results. This improves the accuracy and reliability of the electric vehicle charging station grid connection simulation.

[0074] See also Figure 2 , Figure 2 A flowchart of a method for evaluating the grid connection of an electric vehicle charging station provided by another embodiment of the present invention. Specifically, the following steps may be included:

[0075] Step 201, collecting first power system parameters of the electric vehicle charging station;

[0076] In the embodiment of the present invention, sensors, measuring instruments and other equipment may be used to collect first power system parameters of the electric vehicle charging station in real time, including voltage, current, power factor, harmonic content and the like.

[0077] Step 202, collecting a second power system parameter of a grid connection point of the electric vehicle charging station in the power system;

[0078] In an embodiment of the present invention, sensors, measuring instruments and other equipment may be used to collect in real time the second power system parameters of the grid connection point of the electric vehicle charging station in the power system, including voltage, current, power factor, harmonic content and the like.

[0079] Step 203, constructing an electric vehicle charging station model using the first power system parameter;

[0080] After the first power system parameters of the electric vehicle charging station are collected, the first power system parameters may be used in combination with the actual structure of the electric vehicle charging station to construct an electric vehicle charging station model.

[0081] In one example, the first power system parameter includes a charger parameter and a battery parameter; step 203 may include the following sub-steps:

[0082] S31, obtaining a charging station topology structure of the electric vehicle charging station; the charging station topology structure includes a charger and a battery;

[0083] S32, setting a first voltage level, a first current level and a power factor of the charger according to the charger parameters, and setting a battery capacity, a charging rate and a discharging rate of the battery according to the battery parameters, to obtain an electric vehicle charging station model.

[0084] In a specific implementation, the topology of the electric vehicle charging station can be determined according to the actual situation of the station, including the number of chargers, connection mode, etc. Then, the first voltage level, first current level, power factor, etc. of the charger can be set according to the collected charger parameters. And the capacity, charging rate, and discharge rate of the charger battery can be set according to the collected battery parameters.

[0085] Step 204, constructing a power system model using the second power system parameter;

[0086] After the second power system parameters at the electric vehicle charging station grid connection point are collected, the second power system parameters can be used in combination with the actual structure at the power system grid connection point to construct a power system model.

[0087] In one example, step 204 may include the following sub-steps:

[0088] S41, obtaining a power system topology structure of a grid connection point of an electric vehicle charging station in a power system; the topology structure includes a connection mode of multiple power devices;

[0089] S42, acquiring a second voltage level, a second current level, and a line impedance of each power device from the second power system parameters;

[0090] S43, setting a corresponding second voltage level, second current level and line impedance for each power device to construct a power system model.

[0091] In a specific implementation, the power system topology structure of the power system can be determined according to the actual situation of the electric vehicle charging station grid connection point, including power equipment such as generators, transformers, transmission lines and their connection methods and parameters. Then, the second voltage level, second current level and line impedance are set for each power equipment according to the collected second power system parameters, thereby constructing a power system model.

[0092] Step 205, constructing a grid-connected simulation model using the electric vehicle charging station model and the power system model;

[0093] After the electric vehicle charging station model and the power system model are constructed, the electric vehicle charging station model and the power system model can be spliced ​​based on the grid connection point to obtain a simulation model of the electric vehicle charging station after grid connection.

[0094] Step 206, obtaining simulation time and simulation step size;

[0095] Step 207, based on the simulation time and the simulation step size, the grid-connected simulation model is run in the real-time digital simulation system to monitor the operation characteristics of the power system after the electric vehicle charging station is connected to the grid in real time, and obtain the simulation results;

[0096] In the specific implementation, according to the actual simulation needs, the simulation parameters of the real-time digital simulation system can be set, including simulation time, simulation step, etc. Then the grid-connected simulation model is loaded into RTDS, the simulation operation is started, and the operation process is monitored in real time to obtain the simulation results. The simulation results can include the operation characteristics of the power system after the electric vehicle charging station is connected to the grid, including the changes in parameters such as voltage, current, and power factor.

[0097] Step 208: Generate an assessment report on the impact of the electric vehicle charging station grid connection on the power system based on the simulation results.

[0098] After obtaining the simulation results of the grid-connected simulation model, the impact of the grid-connected electric vehicle charging station on the voltage, current, power factor and other parameters of the power system, as well as the possible grid voltage fluctuations, harmonic pollution and other problems can be evaluated based on the simulation results. Then, an impact assessment report can be generated based on the evaluation results, and corresponding grid planning, operation and control suggestions can be put forward to ensure the safe and stable operation of the power system.

[0099] The present invention collects the first power system parameters of the electric vehicle charging station; collects the second power system parameters of the grid connection point of the electric vehicle charging station in the power system; uses the first power system parameters to build the electric vehicle charging station model; uses the second power system parameters to build the power system model; uses the electric vehicle charging station model and the power system model to build the grid connection simulation model; runs the grid connection simulation model in a real-time digital simulation system to obtain simulation results; and generates an impact assessment report of the electric vehicle charging station grid connection on the power system according to the simulation results. This improves the accuracy and reliability of the electric vehicle charging station grid connection simulation.

[0100] See also Figure 3 , Figure 3 A structural block diagram of a grid-connected evaluation device for an electric vehicle charging station provided in an embodiment of the present invention.

[0101] An embodiment of the present invention provides a device for evaluating the grid connection of an electric vehicle charging station, comprising:

[0102] The first power system parameter acquisition module 301 is used to acquire the first power system parameter of the electric vehicle charging station;

[0103] The second power system parameter acquisition module 302 is used to acquire the second power system parameter of the grid connection point of the electric vehicle charging station in the power system;

[0104] An electric vehicle charging station model building module 303 is used to build an electric vehicle charging station model using the first power system parameters;

[0105] A power system model building module 304, configured to build a power system model using the second power system parameter;

[0106] A grid-connected simulation model building module 305 is used to build a grid-connected simulation model using an electric vehicle charging station model and a power system model;

[0107] The simulation module 306 is used to run the grid-connected simulation model in the real-time digital simulation system to obtain simulation results;

[0108] The report generation module 307 is used to generate an assessment report on the impact of the electric vehicle charging station grid connection on the power system according to the simulation results.

[0109] In the embodiment of the present invention, the first power system parameter includes charger parameters and battery parameters; the electric vehicle charging station model building module 303 includes:

[0110] The charging station topology structure acquisition submodule is used to acquire the charging station topology structure of the electric vehicle charging station; the charging station topology structure includes a charger and a battery;

[0111] The electric vehicle charging station model building submodule is used to set the first voltage level, the first current level and the power factor of the charger according to the charger parameters, and to set the battery capacity, the charging rate and the discharging rate of the battery according to the battery parameters to obtain the electric vehicle charging station model.

[0112] In the embodiment of the present invention, the power system model building module 304 includes:

[0113] The power system topology acquisition submodule is used to acquire the power system topology of the grid connection point of the electric vehicle charging station in the power system; the topology includes the connection mode of multiple power devices;

[0114] A parameter acquisition submodule, used to acquire the second voltage level, the second current level and the line impedance of each power device from the second power system parameters;

[0115] The power system model building submodule is used to set the corresponding second voltage level, second current level and line impedance for each power device to build a power system model.

[0116] In the embodiment of the present invention, the simulation module 306 includes:

[0117] The simulation time and simulation step length acquisition submodule is used to obtain the simulation time and simulation step length;

[0118] The simulation submodule is used to run the grid-connected simulation model in the real-time digital simulation system based on the simulation time and simulation step size, monitor the power system operation characteristics after the electric vehicle charging station is connected to the grid in real time, and obtain the simulation results.

[0119] An embodiment of the present invention further provides an electronic device, the device comprising a processor and a memory:

[0120] The memory is used to store the program code and transmit the program code to the processor;

[0121] The processor is used to execute the electric vehicle charging station grid connection evaluation method according to the instructions in the program code.

[0122] The embodiment of the present invention further provides a computer-readable storage medium, which is used to store program codes, and the program codes are used to execute the electric vehicle charging station grid connection evaluation method of the embodiment of the present invention.

[0123] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0124] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0125] It will be appreciated by those skilled in the art that the embodiments of the present invention may be provided as methods, devices, or computer program products. Therefore, the embodiments of 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 embodiments of 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 codes.

[0126] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the 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 the 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 terminal device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal 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.

[0127] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0128] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0129] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0130] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0131] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for evaluating the grid connection of an electric vehicle charging station, characterized in that: include: Collecting first power system parameters of electric vehicle charging stations; Collecting a second power system parameter of a grid connection point of the electric vehicle charging station in the power system; constructing an electric vehicle charging station model using the first power system parameters; constructing a power system model using the second power system parameter; Using the electric vehicle charging station model and the power system model to build a grid-connected simulation model; Running the grid-connected simulation model in a real-time digital simulation system to obtain simulation results; An impact assessment report of the electric vehicle charging station being connected to the grid on the power system is generated based on the simulation results.

2. The method according to claim 1, characterized in that The first power system parameters include charger parameters and battery parameters; the step of using the first power system parameters to construct an electric vehicle charging station model includes: Acquire a charging station topology structure of the electric vehicle charging station; the charging station topology structure includes a charger and a battery; The first voltage level, the first current level and the power factor of the charger are set according to the charger parameters, and the battery capacity, the charging rate and the discharging rate of the battery are set according to the battery parameters to obtain an electric vehicle charging station model.

3. The method according to claim 1, characterized in that The step of constructing a power system model according to the second power system parameter comprises: Obtaining a power system topology structure of a grid connection point of an electric vehicle charging station in a power system; the topology structure includes a connection mode of multiple power devices; Acquire the second voltage level, the second current level and the line impedance of each of the electric power equipment from the second electric power system parameters; A corresponding second voltage level, second current level and line impedance are set for each of the electric power equipment to construct an electric power system model.

4. The method according to claim 1, characterized in that: The step of running the grid-connected simulation model in a real-time digital simulation system to obtain simulation results includes: Get simulation time and simulation step size; Based on the simulation time and simulation step, the grid-connected simulation model is run in a real-time digital simulation system to monitor the operation characteristics of the power system after the electric vehicle charging station is connected to the grid in real time to obtain simulation results.

5. An electric vehicle charging station grid connection evaluation device, characterized in that: include: A first power system parameter acquisition module, used to acquire first power system parameters of the electric vehicle charging station; A second power system parameter acquisition module, used to acquire a second power system parameter of a grid connection point of the electric vehicle charging station in the power system; An electric vehicle charging station model building module, used to build an electric vehicle charging station model using the first power system parameters; A power system model building module, used to build a power system model using the second power system parameters; A grid-connected simulation model construction module, used to construct a grid-connected simulation model using the electric vehicle charging station model and the power system model; A simulation module, used for running the grid-connected simulation model in a real-time digital simulation system to obtain simulation results; A report generation module is used to generate an evaluation report on the impact of the electric vehicle charging station being connected to the grid on the power system based on the simulation results.

6. The device according to claim 5, characterized in that The first power system parameters include charger parameters and battery parameters; the electric vehicle charging station model building module includes: A charging station topology structure acquisition submodule is used to acquire the charging station topology structure of the electric vehicle charging station; the charging station topology structure includes a charger and a battery; The electric vehicle charging station model building submodule is used to set the first voltage level, the first current level and the power factor of the charger according to the charger parameters, and to set the battery capacity, the charging rate and the discharging rate of the battery according to the battery parameters to obtain the electric vehicle charging station model.

7. The device according to claim 5, characterized in that The power system model building module includes: The power system topology acquisition submodule is used to acquire the power system topology of the grid connection point of the electric vehicle charging station in the power system; the topology includes the connection mode of multiple power devices; A parameter acquisition submodule, used for acquiring the second voltage level, the second current level and the line impedance of each of the electric power devices from the second electric power system parameters; The power system model construction submodule is used to set the corresponding second voltage level, second current level and line impedance for each of the power devices to construct a power system model.

8. The device according to claim 5, characterized in that The simulation module comprises: The simulation time and simulation step length acquisition submodule is used to obtain the simulation time and simulation step length; The simulation submodule is used to run the grid-connected simulation model in a real-time digital simulation system based on the simulation time and simulation step size, monitor the power system operation characteristics after the electric vehicle charging station is connected to the grid in real time, and obtain simulation results.

9. An electronic device, characterized in that: The device comprises a processor and a memory: The memory is used to store program code and transmit the program code to the processor; The processor is used to execute the electric vehicle charging station grid connection evaluation method according to any one of claims 1-4 according to the instructions in the program code.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium is used to store program codes, and the program codes are used to execute the electric vehicle charging station grid connection evaluation method according to any one of claims 1 to 4.

Images