A rapid verification system and equipment for grid-related adaptability strategies of energy storage power stations

Abstract

The present invention discloses a system and equipment for rapid verification of grid-related adaptability strategies of energy storage power stations. The system for rapid verification of grid-related adaptability strategies of energy storage power stations includes: an interface module, which is used to connect to the monitoring system in the energy storage power station; a data input module, which is used to set the application scenario and corresponding specific parameter setting values ​​of the energy storage power station for grid-related control strategy verification; a state generation module, which is used to simulate the grid state under the application scenario, and use a continuous dynamic function to input the working condition information under the grid state into the monitoring system through the interface module in the form of a signal; a processing module, which is used to judge the dynamic adaptability of the grid-related control strategy of the energy storage power station according to the changes in the working condition information and the changes in specific parameters fed back by the monitoring system. The present invention can quickly verify the overall control strategy of the energy storage power station without decoupling the power station, and is easy to operate; and continuous dynamic working conditions can be input to verify the dynamic adaptability of the grid-related strategy of the energy storage power station.

Description

Technical Field

[0001] The present invention belongs to the technical field of grid-related strategies for energy storage power stations, and more specifically, relates to a system and equipment for rapid verification of grid-related adaptability strategies for energy storage power stations. Background Art

[0002] In order to achieve "carbon peak and carbon neutrality", my country's power system is gradually developing towards a new power system with a high proportion of new energy and high power electronics. As a key technology to ensure the stable operation of new energy, energy storage has gradually improved its status in the new power system and its scale has continued to increase. At present, a single power station has reached the 100-megawatt level. Energy storage is now mostly used for peak shaving and valley filling, smoothing fluctuations in new energy, etc. Its control mode is to accept instructions from the dispatching center, complete the absorption or release of command power, and ensure the stable operation of the power grid. The new power system requires active support from energy storage, such as rapid frequency regulation, dynamic voltage regulation, emergency support, etc., which puts higher requirements on its control strategy. Due to the fast response speed of energy storage, if its control strategy is unreasonable, it will become a source of interference to the power grid and affect the stable operation of the new power system. Therefore, it is necessary to debug and test its grid-related control strategy before the energy storage power station is put into operation, and conduct regular evaluation after the energy storage power station is put into operation.

[0003] At present, energy storage power stations use power grid simulators for strategy verification. The capacity of power grid simulators has developed from hundreds of kilowatts to several megawatts, with a maximum of ten megawatts, while the scale of energy storage power stations has reached hundreds of megawatts. The power grid simulator is limited by power and cannot be tested directly from the grid connection point. It can only randomly select energy storage units for testing and infer the status of the entire energy storage power station. It cannot directly reflect the grid-related adaptability of the energy storage power station. In addition, its test operation is also very cumbersome and time-consuming. It is necessary to decouple the parallel AC busbars and shut down the power. After the test is completed, the power needs to be reinstalled and the power needs to be supplied for debugging. At present, for the overall grid-related strategy evaluation of energy storage power stations, only relay protection instruments can be used to measure relay protection parameters and action parameters. For strategy verification, the relay protection instrument can only input discrete state data one by one for detection, which is inefficient. Especially when the energy storage power station is actively supported, it is even more impossible to quickly verify the power station strategy. Summary of the invention

[0004] In view of the defects of the prior art, the purpose of the present invention is to provide a system and equipment for quickly verifying the grid-related adaptability strategy of an energy storage power station, which can quickly verify the overall control strategy of the energy storage power station without decoupling the power station and is easy to operate; and continuous dynamic operating conditions can be input to verify the dynamic adaptability of the grid-related strategy of the energy storage power station.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a system for quickly verifying a grid-related adaptability strategy of an energy storage power station, comprising:

[0006] An interface module, used to connect to a monitoring system in the energy storage power station to be verified;

[0007] The data input module includes a conventional input unit and an advanced custom unit, wherein the conventional input unit is used to obtain a specific application scenario selected by a user and a corresponding specific parameter setting value, wherein the specific application scenario is determined according to the state in which the energy storage power station to be verified needs to be connected to the power grid; and the advanced custom unit is used to generate a custom application scenario and a corresponding specific parameter setting value according to a custom program input by the user;

[0008] A state generation module, used for simulating the state of the power grid under the specific application scenario or the custom application scenario, and using a continuous dynamic function to input the working condition information under the power grid state into the monitoring system through the interface module in the form of a signal;

[0009] A processing module is used to obtain the operating condition information and the specific parameter information fed back by the monitoring system in real time, and judge the dynamic adaptability of the grid-related control strategy of the energy storage power station to be verified according to the time when the specific parameter information is restored to the specific parameter setting value and the time when the operating condition information is restored to stability.

[0010] The energy storage power station grid-related adaptability strategy rapid verification system provided by the present invention can realize the rapid verification of the direct grid-related control strategy of the 100-megawatt energy storage power station, that is, directly simulate the grid state under the application scenario according to the set application scenario, and use a continuous dynamic function to transmit the working condition information under the grid state to the monitoring system in the energy storage power station in the form of a signal. This process is to perform secondary side detection in the energy storage power station, without the need for actual power electronic devices, and without voltage and current transmission size restrictions. Therefore, compared with traditional power grid simulators, it can realize direct detection of the grid-related strategy of the 100-megawatt energy storage power station. In addition, the verification system provided by the present invention is also provided with a state generation module. The state generation module is different from the point-by-point state input of the traditional relay protection instrument. The program defined by the continuous function is used for the overall state input method. Therefore, continuous dynamic working conditions can be input into the energy storage power station to verify the dynamic adaptability of the energy storage power station's grid-related strategy, which has the characteristics of high verification efficiency.

[0011] In one of the embodiments, a fine-tuning module is further included. When the processing module determines that the dynamic adaptability of the grid-related control strategy of the energy storage power station to be verified is outside the preset adaptability range, it is used for the user to input a modification instruction for the grid-related control strategy of the energy storage power station to be verified.

[0012] In one of the embodiments, the fine-tuning module is also used for the user to input modification instructions for the custom program.

[0013] In one of the embodiments, the fine-tuning module uses a touch screen keyboard.

[0014] In one of the embodiments, it also includes a data export module for exporting the modified network-related control policy information and / or the modified custom program.

[0015] In one of the embodiments, a display module is further included for displaying the custom program, the operating condition information, the specific parameter information and the network-related control strategy information.

[0016] In one embodiment, the display module adopts a dual display screen.

[0017] In one embodiment, a switch module is further included, which is connected to the processing module and the display module respectively. The switch module is used to receive an on-off instruction input by a user, and the processing module is used to control the opening or closing of the display module according to the on-off instruction.

[0018] In a second aspect, the present invention provides a device for quickly verifying the grid-related adaptability strategy of an energy storage power station, including the above-mentioned system for quickly verifying the grid-related adaptability strategy of an energy storage power station.

[0019] The energy storage power station grid-related adaptability strategy rapid verification equipment provided by the present invention can continuously verify the overall control strategy of the energy storage power station without decoupling the power station, and without the need for point-by-point input, verification and sorting. The verification speed is fast and efficient, and it can be applied to the verification of grid-related control strategies before and after the commissioning of large-scale energy storage power stations of hundreds of megawatts. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a module schematic diagram of a system for rapid verification of grid-related adaptability strategies of energy storage power stations provided in one embodiment;

[0021] Figure 2 It is a module schematic diagram of a rapid verification system for a grid-related adaptability strategy of an energy storage power station provided in another embodiment;

[0022] Figure 3 It is a schematic diagram of the structure of a rapid verification device for a grid-related adaptability strategy of an energy storage power station provided in one embodiment. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] It should be noted that the traditional grid simulator detection strategy for energy storage power stations is embedded detection. The grid simulator calculates the corresponding voltage and current instructions based on the grid operating information in a certain application scenario to be simulated, and sends them to the energy storage power station to be verified. Due to cost and technology constraints, the power electronic devices inside the grid simulator are currently unable to withstand hundreds of megawatts of energy flow. During the test, the voltage and current tolerance levels flowing through the grid simulator can only match a single megawatt energy storage unit. Therefore, the grid simulator cannot be tested directly from the grid connection point of the energy storage power station, and can only randomly select one of the energy storage units for testing, thereby inferring the status of the entire energy storage power station. Therefore, the use of a grid simulator cannot directly reflect the grid adaptability of the energy storage power station.

[0025] Traditionally, relay protection instruments can only input discrete state data one by one into the energy storage power station to be verified for testing. It is aimed at testing the relay protection of the power system, while the actual grid conditions are dynamic and continuous. Therefore, the use of relay protection instruments for verification has problems such as low testing efficiency, cumbersome operation, and limited detection parameters.

[0026] Based on this, the present invention provides a new solution to solve the technical problems described above, and its specific structure will be described in detail in the subsequent embodiments.

[0027] Please read first Figure 1 , Figure 1 A schematic diagram of a module of a system for quickly verifying a grid-related adaptability strategy of an energy storage power station provided by an embodiment of the present invention is shown in FIG. Figure 1 As shown, the verification system includes an interface module 100 , a data input module 200 , a state generation module 300 and a processing module 400 .

[0028] The interface module 100 provided in this embodiment is used to connect to the monitoring system in the energy storage power station 10 to be verified.

[0029] It should be noted that the energy storage power station 10 commonly used in this field mainly includes a monitoring system, an energy storage system, a battery management system (BMS), an energy storage bidirectional conversion system (PCS) and a distribution system, wherein the monitoring system plays a role in uploading and downloading for the energy storage system, that is, on the one hand, it is used to receive the dispatching instructions issued by the power grid, and on the other hand, it is used to distribute the dispatching instructions to each energy storage unit in the energy storage system according to the energy management strategy; at the same time, it also plays a role in monitoring the operating status of the entire energy storage system.

[0030] The interface module 100 provided in this embodiment is electrically connected to the monitoring system in the energy storage power station 10, that is, connected to the secondary side of the energy storage power station 10. Compared with the traditional connection with the primary side of the energy storage power station 10 (connected to the grid connection point of the energy storage power station 10 or the output end of each energy storage unit), there is no need for actual power electronic devices, no voltage and current transmission size restrictions, and can realize direct grid-related strategy rapid detection of 100-megawatt energy storage power stations.

[0031] The data input module 200 provided in this embodiment is used to set the application scenario for the energy storage power station 10 to perform grid-related control strategy verification. Specifically, the data input module 200 may include a conventional input unit 210 and an advanced customization unit 220. The conventional input unit 210 is used to obtain a specific application scenario selected by a user and a corresponding specific parameter setting value. The specific application scenario is determined according to the state in which the energy storage power station 10 needs to be connected to the grid.

[0032] It can be understood that this specific application scenario is a typical application scenario of energy storage power stations in this field, such as passive action situations such as peak shaving and valley filling or active support situations, etc. In order to more clearly illustrate the relationship between this specific application scenario and the corresponding specific parameter, the following examples are given: for example, when the specific application scenario is primary frequency modulation, the corresponding specific parameter set may be the frequency difference; when the specific application scenario is secondary frequency modulation, the corresponding specific parameter set may be the power qualification rate; when the specific application scenario is voltage regulation, the corresponding specific parameter set may be the voltage difference.

[0033] The advanced customization unit 220 provided in this embodiment is used to generate a customized application scenario and corresponding specific parameter setting values ​​according to the customized program input by the user. It can be understood that the customized application scenario is an atypical application scenario of the energy storage power station, which can be set accordingly according to the state of the power grid to be connected, and this embodiment does not limit it. Specifically, the customized program can be first stored in a readable storage device, and then imported into the system through the readable storage device.

[0034] The state generation module 300 provided in this embodiment is used to simulate the state of the power grid under a specific application scenario or a custom application scenario, and uses a continuous dynamic function to input the working condition information under the power grid state into the monitoring system of the energy storage power station 10 through the interface module 100 in the form of a signal, and then the energy management strategy in the monitoring system calculates the output instructions of each energy storage unit under the working condition and sends it to the corresponding energy storage unit in the energy storage system. At the same time, the monitoring system monitors the state information of the energy storage system in real time, and sends the real-time monitored state information to the processing module 400.

[0035] The processing module 400 is used to determine the dynamic adaptability of the grid-related control strategy of the energy storage power station 10 according to the changes in the above-mentioned operating condition information and the changes in the specific parameters in the status information fed back by the monitoring system. Specifically, the corresponding judgment is made according to the time when the operating condition information returns to stability and the time (response speed) when the specific parameters return to the above-mentioned specific parameter setting values.

[0036] To more clearly illustrate the energy storage power station grid-related adaptability strategy rapid verification system provided by the above embodiment, the following example is given:

[0037] If there is a scenario where a large-scale load is suddenly missing, causing the grid frequency to drop, user 1 verifies the grid-related adaptability strategy of a certain energy storage power station. First, connect the system to the energy storage power station 10, and the system will preliminarily identify the basic parameters of the energy storage power station, such as the rated capacity. The user selects the scenario where the grid frequency drops, and then inputs the size of the missing load according to their own needs. The system will simulate the application scenario selected by the energy storage power station 10 according to the user-set parameters. Verify whether the energy storage power station is suitable for application in this specific scenario, and whether the control strategy of the energy storage power station 10 meets the user's expectations. The user can judge the adaptability of the grid-related strategy of the energy storage power station 10 based on the response speed of the power station and the process of the grid frequency returning to stability. Finally, the user chooses to save the data of this verification process and end the verification, or can choose to adjust the scene or parameters as needed to verify again.

[0038] If user 2 wants to verify whether the grid-related adaptability strategy of the energy storage power station meets expectations in the scenario designed by him. First, connect the system to the energy storage power station 10, and the system will preliminarily identify the basic parameters of the energy storage power station, such as rated capacity, etc. The user selects the advanced customization option, and then connects the custom program designed by him to the system through a readable storage device, and waits for the system to complete the reading. The custom program can be browsed and simply improved on the display screen. After selecting to start verification, the system will input the custom program as an internal scenario module to generate this custom scenario. The user can judge the grid-related adaptability strategy of the power station based on the response speed of the power station and the basic parameters of the power grid. Finally, the user chooses to save the data of this verification process and end the verification. He can also save this custom scene to the custom module and name the scene as needed.

[0039] The energy storage power station grid-related adaptability strategy rapid verification system provided in this embodiment can realize the rapid verification of the direct grid-related control strategy of the 100-megawatt energy storage power station, that is, directly simulate the grid state under the application scenario according to the set application scenario, and use a continuous dynamic function to transmit the working condition information under the grid state to the monitoring system in the energy storage power station 10 in the form of a signal. This process is to perform secondary side detection in the energy storage power station 10, without the need for actual power electronic devices, and without voltage and current transmission size restrictions. Therefore, compared with traditional power grid simulators, it can realize direct detection of the grid-related strategy of the 100-megawatt energy storage power station. In addition, the verification system provided by the present invention is also provided with a state generation module 300. The state generation module 300 is different from the point-by-point state input of the traditional relay protection instrument. The program defined by the continuous function is used for the overall state input method. Therefore, continuous dynamic working conditions can be input into the energy storage power station 10 to verify the dynamic adaptability of the grid-related strategy of the energy storage power station, which has the characteristics of high verification efficiency.

[0040] In one embodiment, see Figure 2 , the verification system may also include a fine-tuning module 500, which is used to provide a convenient fine-tuning input method for the user, that is, when the above-mentioned processing module 400 determines that the dynamic adaptability of the grid-related control strategy of the energy storage power station 10 is outside the preset adaptability range, the user can make corresponding adjustments to the program of the grid-related control strategy of the energy storage power station 10 through the fine-tuning module 500, until the processing module 400 determines that the dynamic adaptability of the grid-related control strategy of the energy storage power station 10 is within the preset adaptability range. Of course, the fine-tuning module 500 provided in this embodiment can also be used to adjust the custom program input by the user. Preferably, the fine-tuning module 500 provided in this embodiment can use a touch screen keyboard.

[0041] In one embodiment, the verification system may further include a data export module 600 for exporting the modified network-related control policy information and / or the modified custom program for corresponding storage.

[0042] In one embodiment, in order to facilitate users to intuitively observe the real-time operation status of the energy storage power station 10, the verification system provided by the present invention may also include a display module 800, which uses a dual display screen to display the above-mentioned custom program, operating condition information, specific parameter information and network-related control strategy information.

[0043] Of course, the verification system may also include a switch module 700, which can control the state of the dual display screen according to the actual needs of the user. Specifically, the switch module 700 is connected to the processing module 400 and the display module 800 respectively, and the switch module 700 is used to receive the on-off instruction input by the user, and the processing module 400 is used to control the opening or closing of the display module 800 according to the on-off instruction. It can be understood that the switch module 700 provided in this embodiment can be a standby switch, a main switch, a wiring protection switch, etc. in addition to the display screen switch, which can be selected according to the actual situation of the verification system, and this embodiment does not limit it.

[0044] Based on the same inventive concept, the present invention also provides a rapid verification device for a grid-related adaptability strategy of an energy storage power station, such as Figure 3 As shown, the verification equipment includes a verification cabinet, on one side wall of which the above-mentioned interface module 100, data input module 200, fine-tuning module 500, data export module 600, display module 800 and switch module 700 are simultaneously provided, and the above-mentioned state generation module 300 and processing module 400 are provided inside the verification cabinet.

[0045] Specifically, the functions of each module in the energy storage power station grid-related adaptability strategy rapid verification equipment provided in this embodiment can be found in the introduction of the above-mentioned verification system embodiment, and will not be repeated in this embodiment.

[0046] The steps of using the energy storage power station grid-related adaptability strategy rapid verification equipment provided in this embodiment to verify the power station grid-related adaptability strategy specifically include:

[0047] Step S10, connecting the device to a specific access point of the energy storage power station where rapid strategy verification is required, that is, a monitoring system in the energy storage power station.

[0048] Step S20, start the equipment to identify the basic parameters of the power station, and then pop up to verify the selection of a specific application scenario.

[0049] In step S30, the user selects a specific application scenario as needed, and then proceeds to step S40; or directly selects the advanced customization option and proceeds to step S50.

[0050] Step S40, upon selecting this equipment, a conventional input interface will pop up to wait for the user to set specific parameters, that is, key parameter settings.

[0051] Step S50, the device prompts to connect the readable storage device to import the custom program, and can also display a virtual keyboard to provide on-site fine-tuning.

[0052] Step S60: After completing the scene input, you can click to start the quick verification of the power station strategy.

[0053] Step S70, output and record the result.

[0054] The energy storage power station grid-related adaptability strategy rapid verification equipment provided in this embodiment can continuously verify the overall control strategy of the energy storage power station without decoupling the power station, and without the need to input, verify and organize point by point. The verification speed is fast and efficient, and it can be applied to the verification of grid-related control strategies before and after the commissioning of large-scale energy storage power stations of hundreds of megawatts.

[0055] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rapid verification system for grid-related adaptability strategies of energy storage power stations, used to test the grid-related control strategies of energy storage power stations before they are put into operation, characterized in that: include: An interface module, used to connect to a monitoring system in the energy storage power station to be verified; The data input module includes a conventional input unit and an advanced custom unit, wherein the conventional input unit is used to obtain a specific application scenario selected by a user and a corresponding specific parameter setting value, wherein the specific application scenario is determined according to the state in which the energy storage power station to be verified needs to be connected to the power grid; and the advanced custom unit is used to generate a custom application scenario and a corresponding specific parameter setting value according to a custom program input by the user; A state generation module, used for simulating the state of the power grid under the specific application scenario or the custom application scenario, and using a continuous dynamic function to input the working condition information under the power grid state into the monitoring system through the interface module in the form of a signal; A processing module is used to obtain the operating condition information and the specific parameter information fed back by the monitoring system in real time, and judge the dynamic adaptability of the grid-related control strategy of the energy storage power station to be verified based on the time when the specific parameter information is restored to the specific parameter setting value and the time when the operating condition information is restored to stability, and verify whether the energy storage power station is suitable for application in this scenario.

2. The energy storage power station grid-related adaptability strategy rapid verification system according to claim 1 is characterized in that: It also includes a fine-tuning module, which is used for the user to input a modification instruction for the grid-related control strategy of the energy storage power station to be verified when the processing module determines that the dynamic adaptability of the grid-related control strategy of the energy storage power station to be verified is outside the preset adaptability range.

3. The energy storage power station grid-related adaptability strategy rapid verification system according to claim 2 is characterized in that: The fine-tuning module is also used for the user to input modification instructions for the custom program.

4. The energy storage power station grid-related adaptability strategy rapid verification system according to claim 3 is characterized in that: The fine-tuning module adopts a touch screen keyboard.

5. The energy storage power station grid-related adaptability strategy rapid verification system according to claim 3 or 4, characterized in that: It also includes a data export module for exporting the modified network-related control strategy information and / or the modified custom program.

6. The energy storage power station grid-related adaptability strategy rapid verification system according to claim 5 is characterized in that: It also includes a display module for displaying the custom program, the operating condition information, the specific parameter information and the network-related control strategy information.

7. The energy storage power station grid-related adaptability strategy rapid verification system according to claim 6 is characterized in that: The display module adopts a dual display screen.

8. The energy storage power station grid-related adaptability strategy rapid verification system according to claim 6 is characterized in that: It also includes a switch module, which is connected to the processing module and the display module respectively. The switch module is used to receive an on-off instruction input by a user, and the processing module is used to control the on or off of the display module according to the on-off instruction.

9. A rapid verification device for grid-related adaptability strategy of energy storage power station, characterized in that: It comprises a rapid verification system for grid-related adaptability strategies of energy storage power stations as described in any one of claims 1 to 8.

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