Method and system for evaluating new energy acceptance capability of power grid

Abstract

The invention is suitable for the technical field of power grid new energy admission processing, and provides a power grid new energy admission capability evaluation method and system. When a real-time power admission scheduling instruction is received in a target energy storage area, if the real-time power admission scheduling instruction is determined to be a flexible scheduling resource type, the power grid new energy admission capability is evaluated; and calling a historical energy acceptance file of the target energy storage area, and screening out a typical energy acceptance record which is most matched with the real-time power acceptance scheduling instruction from the historical energy acceptance file. According to the method, the historical energy acceptance file of the target energy storage area can be called, and the typical energy acceptance record which is most matched with the real-time power acceptance scheduling instruction can be screened from the historical energy acceptance file, so that historical acceptance data can be effectively referred and utilized, and an accurate reference basis is provided. The data driving method not only improves the accuracy of power dispatching, but also reduces the blindness and randomness of system dispatching, thereby enhancing the stability and reliability of power grid dispatching.

Description

Technical Field

[0001] The present invention belongs to the technical field of power grid renewable energy acceptance and processing, and in particular, relates to a power grid renewable energy acceptance capacity assessment method and system. Background Art

[0002] During the operation of the power grid, the acceptance capacity of new energy is an important indicator to measure whether the power grid system can efficiently and safely accept renewable energy (such as wind power and solar power) power generation. With the large-scale access of flexible dispatching resources such as wind power generation and solar power generation, the evaluation of the power grid's new energy acceptance capacity has become a key technical link. These flexible resources are intermittent and volatile, which poses severe challenges to the voltage stability, frequency regulation and overall safety of the power grid. Therefore, how to effectively evaluate the power grid's new energy acceptance capacity and ensure that new energy power generation can be safely and stably integrated with the power grid is an important topic in the current power system research.

[0003] At present, the existing evaluation methods for the acceptance of new energy are usually based on static models and scheduling schemes, lacking accurate analysis and regulation of voltage fluctuations during the access process of flexible scheduling resources. Especially when wind, solar and other new energy power generation is volatile and uncontrollable, traditional evaluation methods are difficult to quickly respond to voltage disturbances that occur during the power acceptance process, and can often only reduce the impact of voltage fluctuations on grid stability through post-correction. This passive processing method leads to a decrease in scheduling efficiency and also increases the safety risks of grid operation. Therefore, the existing technology is still insufficient in terms of the control and optimization technology of voltage fluctuations during the acceptance of new energy by the power grid, and cannot meet the high requirements for the acceptance of flexible scheduling resources such as wind and solar energy. Summary of the invention

[0004] The purpose of the present invention is to provide a method and system for evaluating the new energy acceptance capacity of a power grid, aiming to solve the problems raised in the background technology.

[0005] The present invention is implemented as follows: a method for evaluating the new energy acceptance capacity of a power grid, the method comprising: When the target energy storage area receives the real-time power acceptance dispatch instruction, if it is determined that the real-time power acceptance dispatch instruction is a flexible dispatch resource type, the historical energy acceptance file of the target energy storage area is retrieved, and the typical energy acceptance record that best matches the real-time power acceptance dispatch instruction is selected therefrom; Draw the voltage dynamic response curve of the target energy storage area when accepting energy based on typical energy acceptance records, and analyze whether there is significant voltage disturbance in the voltage dynamic response curve; If it is determined that there is a significant voltage disturbance in the voltage dynamic response curve, determine the target dispatching interval of the significant voltage disturbance and the steady-state power dispatching reference value for the significant voltage disturbance; In the process of executing the real-time power acceptance dispatch instruction, when the target dispatch interval is accepted, the real-time energy acceptance process is subjected to power suppression or pressure boosting according to the steady-state power dispatch reference value.

[0006] As a further limitation of the technical solution of the embodiment of the present invention, when the target energy storage area receives the real-time power acceptance dispatch instruction, if it is determined that the real-time power acceptance dispatch instruction is a flexible dispatch resource type, the steps of retrieving the historical energy acceptance file of the target energy storage area and selecting the typical energy acceptance record that best matches the real-time power acceptance dispatch instruction include: When the target energy storage area receives a real-time power acceptance dispatch instruction, determining whether the real-time power acceptance dispatch instruction is a flexible dispatch resource type; If it is determined that the real-time power acceptance dispatch instruction is a flexible dispatch resource type, the historical energy acceptance file of the target energy storage area is retrieved; The total value of this power dispatch and the specific resource type are determined according to the real-time power acceptance dispatch instruction, and the energy acceptance record with the same specific resource type and the closest to the total value of this power dispatch is selected from the historical energy acceptance archive of the target energy storage area, and this energy acceptance record is set as the typical energy acceptance record.

[0007] As a further limitation of the technical solution of the embodiment of the present invention, the flexible scheduling resource types include two specific resource types: wind power and solar power.

[0008] As a further limitation of the technical solution of the embodiment of the present invention, the steps of drawing a voltage dynamic response curve of the target energy storage area when accepting energy according to the typical energy acceptance record, and analyzing whether there is a significant voltage disturbance in the voltage dynamic response curve include: Obtain data on voltage changes in the target energy storage area during energy acceptance based on typical energy acceptance records; Integrate the data of voltage changes in the target energy storage area during the process of receiving energy, and draw a voltage dynamic response curve; The voltage dynamic response curve is analyzed to check whether there is an inflection point that deviates from the preset amplitude. If so, it is confirmed that there is a significant voltage disturbance in the voltage dynamic response curve.

[0009] As a further limitation of the technical solution of the embodiment of the present invention, if it is determined that there is a significant voltage disturbance in the voltage dynamic response curve, the step of determining the target dispatching interval of the significant voltage disturbance and the steady-state power dispatching reference value for the significant voltage disturbance includes: If it is determined that there is a significant voltage disturbance in the voltage dynamic response curve, the occurrence time and end time of the significant voltage disturbance are determined, and the target dispatching interval is set according to the occurrence time and end time of the significant voltage disturbance; The voltage dynamic response curve is analyzed, and the power dispatch value closest to the inflection point before and after the inflection point that deviates from the preset amplitude and is in the same equilibrium state is determined, and the power dispatch value is set as the steady-state power dispatch reference value for the significant voltage disturbance.

[0010] As a further limitation of the technical solution of the embodiment of the present invention, in the process of executing the real-time power acceptance dispatch instruction, when the target dispatch interval is received, the step of performing power suppression or boosting processing on the real-time energy acceptance process according to the steady-state power dispatch reference value includes: In the process of executing the real-time power acceptance dispatch instruction, when the target dispatch interval is accepted, it is determined whether the real-time power dispatch value is greater than the steady-state power dispatch reference value; If it is determined that the real-time power dispatch value is greater than the steady-state power dispatch reference value, power suppression processing is performed on the real-time energy acceptance process according to the steady-state power dispatch reference value; If it is determined that the real-time power dispatch value is not greater than the steady-state power dispatch reference value, the real-time energy acceptance process is power-boosted according to the steady-state power dispatch reference value.

[0011] A system for evaluating the new energy acceptance capacity of a power grid, the system comprising: a typical energy acceptance record determination module, a significant voltage disturbance judgment module, a voltage dynamic response curve analysis module and a real-time energy acceptance process processing module, wherein: A typical energy acceptance record determination module is used to retrieve the historical energy acceptance files of the target energy storage area and select the typical energy acceptance record that best matches the real-time power acceptance dispatch instruction when the target energy storage area receives the real-time power acceptance dispatch instruction, if the real-time power acceptance dispatch instruction is determined to be a flexible dispatch resource type; A significant voltage disturbance judgment module is used to draw a voltage dynamic response curve of the target energy storage area when accepting energy based on typical energy acceptance records, and analyze whether there is a significant voltage disturbance in the voltage dynamic response curve; A voltage dynamic response curve analysis module is used to determine a target dispatching interval of the significant voltage disturbance and a steady-state power dispatching reference value for the significant voltage disturbance if it is determined that there is a significant voltage disturbance in the voltage dynamic response curve; The real-time energy acceptance process processing module is used to suppress power or boost the real-time energy acceptance process according to the steady-state power dispatch reference value when accepting the target dispatch interval during the execution of the real-time power acceptance dispatch instruction.

[0012] As a further limitation of the technical solution of the embodiment of the present invention, the typical energy admission record determination module specifically includes: A flexible scheduling resource type determination unit, configured to determine whether the real-time power receiving and dispatching instruction is a flexible scheduling resource type when the target energy storage area receives the real-time power receiving and dispatching instruction; A historical energy acceptance file retrieval unit, used to retrieve the historical energy acceptance file of the target energy storage area if it is determined that the real-time power acceptance dispatch instruction is a flexible dispatch resource type; A typical energy acceptance record determination unit is used to determine the total value of this power dispatch and the specific resource type according to the real-time power acceptance dispatch instruction, and select the energy acceptance record with the same specific resource type and the closest to the total value of this power dispatch from the historical energy acceptance archive of the target energy storage area, and set this energy acceptance record as the typical energy acceptance record; The flexible scheduling resource types include two specific resource types: wind power and solar power.

[0013] As a further limitation of the technical solution of the embodiment of the present invention, the significant voltage disturbance judgment module specifically includes: A voltage change data acquisition unit, used to acquire data on voltage changes in the target energy storage area during the process of accepting energy according to typical energy acceptance records; A voltage dynamic response curve drawing unit is used to integrate the data of voltage changes in the target energy storage area during the process of receiving energy and draw a voltage dynamic response curve; The significant voltage disturbance judgment unit is used to analyze the voltage dynamic response curve to check whether there is an inflection point that deviates from a preset amplitude. If so, it is confirmed that there is a significant voltage disturbance in the voltage dynamic response curve.

[0014] As a further limitation of the technical solution of the embodiment of the present invention, the voltage dynamic response curve analysis module specifically includes: A target dispatch interval determination unit is used to determine the occurrence time and end time of the significant voltage disturbance if it is determined that there is a significant voltage disturbance in the voltage dynamic response curve, and set the target dispatch interval according to the occurrence time and end time of the significant voltage disturbance; The steady-state power dispatch reference value determination unit is used to analyze the voltage dynamic response curve, and determine the power dispatch value closest to the inflection point before and after the inflection point that deviates from the preset amplitude and is in the same equilibrium state, and set the power dispatch value as the steady-state power dispatch reference value for the significant voltage disturbance.

[0015] Compared with the prior art, the present invention has the following beneficial effects: First, the present invention retrieves the historical energy acceptance archives of the target energy storage area and selects the typical energy acceptance records that best match the real-time power acceptance dispatch instructions, which can effectively draw on and utilize historical acceptance data to provide an accurate reference basis. This data-driven method not only improves the accuracy of power dispatch, but also reduces the blindness and randomness of system dispatch, thereby enhancing the stability and reliability of power grid dispatch.

[0016] Secondly, the present invention can accurately locate the point where the voltage disturbance occurs by drawing the voltage dynamic response curve and comprehensively analyzing the voltage fluctuation of the target energy storage area during the energy acceptance process. By identifying the significant voltage disturbance in the voltage dynamic response curve, the system can respond quickly when voltage fluctuations occur, and further effectively control the voltage changes of the power grid by setting the steady-state power dispatch reference value. This technology can make timely and effective regulation of the fluctuating power output generated by different flexible dispatch resources (such as wind power and solar energy), thereby reducing the voltage fluctuations caused by unstable factors in the power grid and improving the safety of the system.

[0017] In addition, in the process of executing real-time power acceptance dispatch instructions, the present invention monitors the power acceptance value in real time and performs power suppression or voltage boosting according to the steady-state power dispatch reference value. This dynamic response mechanism enables the system to take timely measures to adjust power for excessively high or low power acceptance values ​​to ensure the stability and security of the power grid. Especially when dealing with the uncertainty of renewable energy sources such as wind power and solar energy, this solution has higher flexibility and adaptability, thereby effectively reducing potential risks caused by voltage fluctuations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A flowchart of a method provided by an embodiment of the present invention; Figure 2 A flow chart of searching for a typical energy acceptance record that best matches a real-time power acceptance dispatch instruction in a method provided by an embodiment of the present invention; Figure 3 A flow chart of analyzing whether there is a significant voltage disturbance in a voltage dynamic response curve in a method provided in an embodiment of the present invention; Figure 4 A flow chart of determining a target dispatching interval for a significant voltage disturbance and a steady-state power dispatching reference value for a significant voltage disturbance in a method provided in an embodiment of the present invention; Figure 5 A flow chart of performing power suppression or pressure boosting processing on a real-time energy acceptance process according to a steady-state power dispatch reference value in a method provided in an embodiment of the present invention; Figure 6 An application architecture diagram of a system provided by an embodiment of the present invention; Figure 7 A structural block diagram of a typical energy admission record determination module in a system provided by an embodiment of the present invention; Figure 8 A structural block diagram of a significant voltage disturbance determination module in a system provided by an embodiment of the present invention; Fig. 9 This is a structural block diagram of a voltage dynamic response curve analysis module in a system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0019] 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.

[0020] Figure 1 A flow chart of a method provided by an embodiment of the present invention is shown.

[0021] Specifically, a method for evaluating the new energy acceptance capacity of a power grid includes the following steps: Step S100, when the target energy storage area receives the real-time power acceptance dispatching instruction, if it is determined that the real-time power acceptance dispatching instruction is a flexible dispatching resource type, the historical energy acceptance file of the target energy storage area is retrieved, and the typical energy acceptance record that best matches the real-time power acceptance dispatching instruction is selected.

[0022] The flexible scheduling resource types include two specific resource types: wind power and solar power.

[0023] In the embodiments of the present invention, the target energy storage area generally refers to a physical area or device in the power system for storing electrical energy, such as a battery energy storage system or other forms of energy storage facilities. Its function is to accept or release electricity according to the needs of the power grid, helping to balance supply and demand fluctuations, especially playing a key role in dealing with the volatility of renewable energy generation. The energy storage area is not just a simple storage facility, it often also has the ability to respond to grid dispatch to support the flexible operation of the power system.

[0024] The power acceptance dispatch instruction is a control command issued by the power dispatch center to adjust the charging and discharging behavior of the energy storage system. The instruction can require the energy storage area to accept power (charging) or release power (discharging) based on the real-time grid operation status.

[0025] The historical energy acceptance archive is a record of the energy storage system's past acceptance or release of electrical energy. These records are usually automatically generated and stored by the energy storage management system, based on the behavior of the energy storage system each time it responds to a power dispatch instruction. The archive should include: the time of each power acceptance, the power value accepted, the voltage change, the energy storage system's status information (such as remaining capacity), and the source of electricity (such as wind or solar energy). The main basis of the historical archive is the operation record of the energy storage system, the instructions of the dispatch center, and the data on the operation status of the power grid. These archives provide a reference for subsequent power dispatch, especially to help find a reasonable dispatch strategy when dealing with similar situations in the future.

[0026] The "flexibly dispatchable resource types" mainly include wind power and solar power. The reason is that these two types of renewable energy have obvious volatility and intermittent characteristics. Wind power generation and solar power generation are affected by natural factors such as weather conditions, sunshine conditions, wind speed, etc., and the output power is unstable. Therefore, the acceptance and scheduling of these resources requires high flexibility and real-time adjustment capabilities. Compared with traditional thermal power or nuclear power, wind power and solar power are more difficult to predict and control. Therefore, when scheduling these resources, the energy storage system needs to flexibly respond to power generation fluctuations based on historical data and the current system status to ensure that the voltage and frequency of the power grid remain stable.

[0027] Specifically, Figure 2 A flow chart for finding a typical energy acceptance record that best matches a real-time power acceptance dispatch instruction is shown.

[0028] Among them, when the target energy storage area receives the real-time power acceptance dispatch instruction, if it is determined that the real-time power acceptance dispatch instruction is a flexible dispatch resource type, the historical energy acceptance file of the target energy storage area is retrieved, and the typical energy acceptance record that best matches the real-time power acceptance dispatch instruction is selected, which specifically includes the following steps: Step S101, when a target energy storage area receives a real-time power acceptance dispatch instruction, determining whether the real-time power acceptance dispatch instruction is a flexible dispatch resource type; Step S102, if it is determined that the real-time power acceptance dispatch instruction is a flexible dispatch resource type, retrieve the historical energy acceptance file of the target energy storage area; Step S103, determine the total value of this power dispatch and the specific resource type according to the real-time power acceptance dispatch instruction, and select the energy acceptance record with the same specific resource type and the closest to the total value of this power dispatch from the historical energy acceptance file of the target energy storage area, and set this energy acceptance record as the typical energy acceptance record.

[0029] In an embodiment of the present invention, in the power system, when a real-time power acceptance dispatch instruction is received, it is first necessary to determine whether the instruction belongs to a flexible dispatch resource type. Usually, the resource category field in the dispatch instruction can be used to determine whether it is a volatile resource type such as wind power, solar power, etc. Flexible dispatch resources are highly volatile and uncontrollable, and whether they are flexible dispatch resource types can be determined by analyzing historical data and real-time monitoring data. When the system detects that the power source has a large volatility, or the degree of match between the load demand and the power supply capacity is low, it can be further confirmed whether the dispatch instruction needs to be flexibly adjusted.

[0030] In the dispatching process, it is of great significance to set typical energy acceptance records. By selecting the typical energy acceptance records that best match the current dispatching instructions from the historical energy acceptance archives of the target energy storage area, a reliable reference can be provided for the dispatching of the current energy storage system. These typical records represent the effective strategies and power acceptance behaviors that the system has adopted in similar situations. Their role is to help the system cope with similar fluctuations or abnormal situations and avoid voltage fluctuations or system instability again.

[0031] The prospect of setting typical energy acceptance records as dispatch reference values ​​is very broad, especially in the context of the rapid development of big data and smart grids. These records lay the foundation for subsequent intelligent dispatch. As the penetration rate of renewable energy in the power grid continues to increase, the system needs to rely more and more on accurate historical data analysis to guide future dispatch, which will greatly improve the automation and dispatch efficiency of the power grid.

[0032] Furthermore, the method for evaluating the new energy acceptance capacity of a power grid further includes the following steps: Step S200: Draw a voltage dynamic response curve of the target energy storage area when accepting energy based on typical energy acceptance records, and analyze whether there is a significant voltage disturbance in the voltage dynamic response curve.

[0033] Specifically, Figure 3 A flow chart is shown for analyzing whether there is a significant voltage disturbance in the voltage dynamic response curve.

[0034] Among them, drawing the voltage dynamic response curve of the target energy storage area when accepting energy based on the typical energy acceptance record and analyzing whether there is a significant voltage disturbance in the voltage dynamic response curve specifically includes the following steps: Step S201, obtaining data on voltage changes in the target energy storage area during energy acceptance according to typical energy acceptance records; Step S202, integrating the data of voltage changes in the target energy storage area during the process of receiving energy, and drawing a voltage dynamic response curve; Step S203, analyzing the voltage dynamic response curve to check whether there is an inflection point that deviates from a preset amplitude, and if so, confirming that there is a significant voltage disturbance in the voltage dynamic response curve.

[0035] In an embodiment of the present invention, when drawing the voltage dynamic response curve, the system first draws the voltage fluctuation of the energy storage area when accepting or releasing electricity based on the voltage change data in the typical energy acceptance record. These data are integrated by collecting real-time voltage change information and combining it with historical data. On the chart, the horizontal axis represents time and the vertical axis represents the voltage value, and a curve of voltage change over time is drawn. Under normal circumstances, this curve should remain smooth or have small fluctuations. However, when the system accepts or releases a large amount of electricity, the voltage curve may have obvious peaks or troughs, indicating that the voltage is rising or falling.

[0036] In the voltage dynamic response curve, the inflection point that deviates from the preset amplitude refers to the moment when the voltage change exceeds the normal fluctuation range set by the system. This is usually based on the voltage fluctuation threshold (such as ±5% or ±10%) preset by the system. When the voltage change at a certain moment exceeds this threshold, the system will detect the inflection point. The appearance of the inflection point indicates that the voltage has fluctuated or disturbed significantly, which may pose a threat to the stability of the system. When judging the inflection point, the system not only considers the voltage value at a certain moment, but also needs to analyze the voltage fluctuation trend before and after the inflection point to confirm whether the fluctuation is continuous.

[0037] Furthermore, the method for evaluating the new energy acceptance capacity of a power grid further includes the following steps: Step S300: If it is determined that there is a significant voltage disturbance in the voltage dynamic response curve, a target dispatching interval of the significant voltage disturbance and a steady-state power dispatching reference value for the significant voltage disturbance are determined.

[0038] Specifically, Figure 4 A flow chart for determining a target dispatch interval for a significant voltage disturbance and a steady-state power dispatch reference value for the significant voltage disturbance is shown.

[0039] If it is determined that there is a significant voltage disturbance in the voltage dynamic response curve, determining the target dispatching interval of the significant voltage disturbance and the steady-state power dispatching reference value for the significant voltage disturbance specifically includes the following steps: Step S301, if it is determined that there is a significant voltage disturbance in the voltage dynamic response curve, determine the occurrence time and end time of the significant voltage disturbance, and set a target scheduling interval according to the occurrence time and end time of the significant voltage disturbance; Step S302, analyzing the voltage dynamic response curve, and determining the power dispatch value closest to the inflection point before and after the inflection point that deviates from the preset amplitude and is in the same equilibrium state, and setting the power dispatch value as the steady-state power dispatch reference value for the significant voltage disturbance.

[0040] In an embodiment of the present invention, when dealing with significant voltage disturbances, the system needs to determine the occurrence time and end time of the voltage disturbance, and set the target dispatch interval according to this time period. The target dispatch interval refers to a specific time period during which power dispatch needs to be adjusted and optimized. By adjusting the power within this interval, the impact of voltage fluctuations can be effectively reduced. The setting of the target dispatch interval is to ensure that during the critical period of voltage fluctuations, the power grid can restore the voltage to a stable state by quickly adjusting the power acceptance or release behavior.

[0041] The power dispatch value closest to the inflection point before and after the inflection point that deviates from the preset amplitude and is in the same equilibrium state plays an important role as the steady-state power dispatch reference value of the system. By finding the dispatch value when the voltage is stable through historical dispatch records, the system can use this value as a reference when there is a significant voltage disturbance to help restore voltage stability. The advantage of this method is that it can quickly provide a verified value to help the system avoid excessive or insufficient regulation, thereby reducing unnecessary voltage fluctuations. This dispatch method based on historical steady-state values ​​is particularly suitable for flexible dispatch resources such as wind power and solar power. These resources are highly volatile, and traditional dispatch methods may not be able to cope with their instantaneous changes. The dispatch reference based on steady-state values ​​allows the system to quickly make appropriate adjustments when the voltage fluctuates.

[0042] The characteristics of flexible resource scheduling require the system to respond quickly, so when voltage fluctuations occur, the system must have good scheduling reaction speed and scheduling accuracy. The steady-state scheduling reference value provided by historical data can greatly improve the automation capability and response speed of the system, thereby ensuring that the power grid can cope with the acceptance of fluctuating resources such as wind and solar energy, and realize a larger scale integration of renewable energy.

[0043] Furthermore, the method for evaluating the new energy acceptance capacity of a power grid further includes the following steps: Step S400, in the process of executing the real-time power acceptance dispatch instruction, when the target dispatch interval is received, the real-time energy acceptance process is subjected to power suppression or pressure boosting processing according to the steady-state power dispatch reference value.

[0044] Specifically, Figure 5 A flow chart of power suppression or boosting processing for a real-time energy acceptance process according to a steady-state power dispatch reference value is shown.

[0045] Among them, in the process of executing the real-time power acceptance dispatch instruction, when the target dispatch interval is accepted, the power suppression or pressure boosting processing of the real-time energy acceptance process is performed according to the steady-state power dispatch reference value, which specifically includes the following steps: Step S401, in the process of executing the real-time power acceptance dispatch instruction, when accepting the target dispatch interval, it is determined whether the real-time power dispatch value is greater than the steady-state power dispatch reference value; Step S402, if it is determined that the real-time power dispatch value is greater than the steady-state power dispatch reference value, power suppression processing is performed on the real-time energy acceptance process according to the steady-state power dispatch reference value; Step S403: If it is determined that the real-time power dispatch value is not greater than the steady-state power dispatch reference value, power boost processing is performed on the real-time energy acceptance process according to the steady-state power dispatch reference value.

[0046] In the embodiment of the present invention, when the system accepts the target dispatch interval, the real-time power acceptance dispatch process begins to enter a critical stage. The target dispatch interval is usually a period when the grid voltage is prone to fluctuations. During this stage, the system will continuously monitor the real-time power dispatch value and compare it with the preset steady-state power dispatch reference value to ensure the stability of the grid.

[0047] If the system detects that the real-time power dispatch value is higher than the steady-state power dispatch reference value within the target dispatch interval, it indicates that too much power is accepted and the grid voltage may face the risk of rising. To deal with this situation, the system will immediately take power suppression measures. Power suppression may include reducing the amount of wind power or solar power generation, or storing excess power in energy storage devices, such as batteries or flywheel systems, to mitigate the impact of excessive power input on grid stability.

[0048] On the contrary, if the system detects that the real-time power dispatch value is lower than the steady-state power dispatch reference value, it means that the power intake is insufficient and the grid voltage may drop. To this end, the system will perform power boosting. Power boosting is usually done by increasing the intake of renewable energy such as wind and solar power, or releasing the power stored in energy storage devices to make up for the insufficient power input and prevent excessive voltage drop.

[0049] For example, during a certain dispatch period, the system detects that the steady-state power dispatch reference value of the target energy storage area is 100MW. When entering the target dispatch interval, the real-time power dispatch value reaches 120MW. At this time, the system will think that the power acceptance is excessive, resulting in voltage rise. To this end, the system starts power suppression, reduces the acceptance of wind power, or stores excess power in batteries, and adjusts the power dispatch value back to around 100MW to maintain grid stability.

[0050] On the contrary, at another time in the same interval, the real-time power dispatch value is only 80 MW, which is far below the steady-state reference value. At this time, the system determines that the power is insufficient and the grid voltage may drop. The system will take power boosting measures to increase the acceptance of solar power generation or release power from the energy storage system to ensure that the accepted power returns to the steady-state reference value and maintain voltage balance.

[0051] This real-time adjustment mechanism enables the system to react quickly when there is an oversupply or undersupply of electricity, effectively reducing grid voltage fluctuations, and is particularly suitable for dealing with uncertain fluctuations caused by flexible dispatch resources such as wind and solar power. This approach ensures the stability and reliability of the grid when handling renewable energy.

[0052] Through such a power regulation mechanism, the system can respond quickly when there is too much or too little power, and make adjustments based on stable power dispatch reference values ​​in historical data to ensure stable operation of the power grid, especially when dealing with power fluctuations caused by flexible dispatch resources.

[0053] Furthermore, Figure 6 The application architecture diagram of the system provided by the embodiment of the present invention is shown.

[0054] Among them, in another preferred embodiment provided by the present invention, a power grid new energy acceptance capacity assessment system includes: The typical energy acceptance record determination module 100 is used to retrieve the historical energy acceptance files of the target energy storage area and select the typical energy acceptance record that best matches the real-time power acceptance dispatching instruction when the target energy storage area receives the real-time power acceptance dispatching instruction.

[0055] The flexible scheduling resource types include two specific resource types: wind power and solar power.

[0056] In the embodiments of the present invention, the target energy storage area generally refers to a physical area or device in the power system for storing electrical energy, such as a battery energy storage system or other forms of energy storage facilities. Its function is to accept or release electricity according to the needs of the power grid, helping to balance supply and demand fluctuations, especially playing a key role in dealing with the volatility of renewable energy generation. The energy storage area is not just a simple storage facility, it often also has the ability to respond to grid dispatch to support the flexible operation of the power system.

[0057] The power acceptance dispatch instruction is a control command issued by the power dispatch center to adjust the charging and discharging behavior of the energy storage system. The instruction can require the energy storage area to accept power (charging) or release power (discharging) based on the real-time grid operation status.

[0058] The historical energy acceptance archive is a record of the energy storage system's past acceptance or release of electrical energy. These records are usually automatically generated and stored by the energy storage management system, based on the behavior of the energy storage system each time it responds to a power dispatch instruction. The archive should include: the time of each power acceptance, the power value accepted, the voltage change, the energy storage system's status information (such as remaining capacity), and the source of electricity (such as wind or solar energy). The main basis of the historical archive is the operation record of the energy storage system, the instructions of the dispatch center, and the data on the operation status of the power grid. These archives provide a reference for subsequent power dispatch, especially to help find a reasonable dispatch strategy when dealing with similar situations in the future.

[0059] The "flexibly dispatchable resource types" mainly include wind power and solar power. The reason is that these two types of renewable energy have obvious volatility and intermittent characteristics. Wind power generation and solar power generation are affected by natural factors such as weather conditions, sunshine conditions, wind speed, etc., and the output power is unstable. Therefore, the acceptance and scheduling of these resources requires high flexibility and real-time adjustment capabilities. Compared with traditional thermal power or nuclear power, wind power and solar power are more difficult to predict and control. Therefore, when scheduling these resources, the energy storage system needs to flexibly respond to power generation fluctuations based on historical data and the current system status to ensure that the voltage and frequency of the power grid remain stable.

[0060] Specifically, Figure 7 It shows a structural block diagram of a typical energy admission record determination module 100 in the system provided by an embodiment of the present invention.

[0061] Among them, in the preferred embodiment provided by the present invention, the typical energy admission record determination module 100 specifically includes: The flexible scheduling resource type determination unit 101 is used to determine whether the real-time power acceptance scheduling instruction is a flexible scheduling resource type when the target energy storage area receives the real-time power acceptance scheduling instruction; The historical energy acceptance file retrieval unit 102 is used to retrieve the historical energy acceptance file of the target energy storage area if it is determined that the real-time power acceptance dispatch instruction is a flexible dispatch resource type; The typical energy acceptance record determination unit 103 is used to determine the total value of this power dispatch and the specific resource type according to the real-time power acceptance dispatch instruction, and to select the energy acceptance record with the same specific resource type and the closest to the total value of this power dispatch from the historical energy acceptance archive of the target energy storage area, and set this energy acceptance record as the typical energy acceptance record.

[0062] In an embodiment of the present invention, in the power system, when a real-time power acceptance dispatch instruction is received, it is first necessary to determine whether the instruction belongs to a flexible dispatch resource type. Usually, the resource category field in the dispatch instruction can be used to determine whether it is a volatile resource type such as wind power, solar power, etc. Flexible dispatch resources are highly volatile and uncontrollable, and whether they are flexible dispatch resource types can be determined by analyzing historical data and real-time monitoring data. When the system detects that the power source has a large volatility, or the degree of match between the load demand and the power supply capacity is low, it can be further confirmed whether the dispatch instruction needs to be flexibly adjusted.

[0063] In the dispatching process, it is of great significance to set typical energy acceptance records. By selecting the typical energy acceptance records that best match the current dispatching instructions from the historical energy acceptance archives of the target energy storage area, a reliable reference can be provided for the dispatching of the current energy storage system. These typical records represent the effective strategies and power acceptance behaviors that the system has adopted in similar situations. Their role is to help the system cope with similar fluctuations or abnormal situations and avoid voltage fluctuations or system instability again.

[0064] The prospect of setting typical energy acceptance records as dispatch reference values ​​is very broad, especially in the context of the rapid development of big data and smart grids. These records lay the foundation for subsequent intelligent dispatch. As the penetration rate of renewable energy in the power grid continues to increase, the system needs to rely more and more on accurate historical data analysis to guide future dispatch, which will greatly improve the automation and dispatch efficiency of the power grid.

[0065] Furthermore, the power grid new energy acceptance capacity assessment system also includes: The significant voltage disturbance judgment module 200 is used to draw a voltage dynamic response curve of the target energy storage area when accepting energy according to the typical energy acceptance record, and analyze whether there is a significant voltage disturbance in the voltage dynamic response curve.

[0066] Specifically, Figure 8 The structure block diagram of the significant voltage disturbance determination module 200 in the system provided by the embodiment of the present invention is shown.

[0067] Among them, in the preferred embodiment provided by the present invention, the significant voltage disturbance judgment module 200 specifically includes: The voltage change data acquisition unit 201 is used to acquire the voltage change data of the target energy storage area during the process of accepting energy according to the typical energy acceptance record; The voltage dynamic response curve drawing unit 202 is used to integrate the data of voltage change of the target energy storage area during the process of receiving energy and draw a voltage dynamic response curve; The significant voltage disturbance judging unit 203 is used to analyze the voltage dynamic response curve to check whether there is an inflection point that deviates from a preset amplitude. If so, it is confirmed that there is a significant voltage disturbance in the voltage dynamic response curve.

[0068] In an embodiment of the present invention, when drawing the voltage dynamic response curve, the system first draws the voltage fluctuation of the energy storage area when accepting or releasing electricity based on the voltage change data in the typical energy acceptance record. These data are integrated by collecting real-time voltage change information and combining it with historical data. On the chart, the horizontal axis represents time and the vertical axis represents the voltage value, and a curve of voltage change over time is drawn. Under normal circumstances, this curve should remain smooth or have small fluctuations. However, when the system accepts or releases a large amount of electricity, the voltage curve may have obvious peaks or troughs, indicating that the voltage is rising or falling.

[0069] In the voltage dynamic response curve, the inflection point that deviates from the preset amplitude refers to the moment when the voltage change exceeds the normal fluctuation range set by the system. This is usually based on the voltage fluctuation threshold (such as ±5% or ±10%) preset by the system. When the voltage change at a certain moment exceeds this threshold, the system will detect the inflection point. The appearance of the inflection point indicates that the voltage has fluctuated or disturbed significantly, which may pose a threat to the stability of the system. When judging the inflection point, the system not only considers the voltage value at a certain moment, but also needs to analyze the voltage fluctuation trend before and after the inflection point to confirm whether the fluctuation is continuous.

[0070] Furthermore, the power grid new energy acceptance capacity assessment system also includes: The voltage dynamic response curve analysis module 300 is used to determine a target dispatching interval of the significant voltage disturbance and a steady-state power dispatching reference value for the significant voltage disturbance if it is determined that there is a significant voltage disturbance in the voltage dynamic response curve.

[0071] Specifically, Fig. 9 The structure block diagram of the voltage dynamic response curve analysis module 300 in the system provided by the embodiment of the present invention is shown.

[0072] Among them, in the preferred embodiment provided by the present invention, the voltage dynamic response curve analysis module 300 specifically includes: The target scheduling interval determination unit 301 is used to determine the occurrence time and end time of the significant voltage disturbance if it is determined that there is a significant voltage disturbance in the voltage dynamic response curve, and set the target scheduling interval according to the occurrence time and end time of the significant voltage disturbance; The steady-state power dispatch reference value determination unit 302 is used to analyze the voltage dynamic response curve, and determine the power dispatch value closest to the inflection point before and after the inflection point that deviates from the preset amplitude and is in the same equilibrium state, and set the power dispatch value as the steady-state power dispatch reference value for the significant voltage disturbance.

[0073] In an embodiment of the present invention, when dealing with significant voltage disturbances, the system needs to determine the occurrence time and end time of the voltage disturbance, and set the target dispatch interval according to this time period. The target dispatch interval refers to a specific time period during which power dispatch needs to be adjusted and optimized. By adjusting the power within this interval, the impact of voltage fluctuations can be effectively reduced. The setting of the target dispatch interval is to ensure that during the critical period of voltage fluctuations, the power grid can restore the voltage to a stable state by quickly adjusting the power acceptance or release behavior.

[0074] The power dispatch value closest to the inflection point before and after the inflection point that deviates from the preset amplitude and is in the same equilibrium state plays an important role as the steady-state power dispatch reference value of the system. By finding the dispatch value when the voltage is stable through historical dispatch records, the system can use this value as a reference when there is a significant voltage disturbance to help restore voltage stability. The advantage of this method is that it can quickly provide a verified value to help the system avoid excessive or insufficient regulation, thereby reducing unnecessary voltage fluctuations. This dispatch method based on historical steady-state values ​​is particularly suitable for flexible dispatch resources such as wind power and solar power. These resources are highly volatile, and traditional dispatch methods may not be able to cope with their instantaneous changes. The dispatch reference based on steady-state values ​​allows the system to quickly make appropriate adjustments when the voltage fluctuates.

[0075] The characteristics of flexible resource scheduling require the system to respond quickly, so when voltage fluctuations occur, the system must have good scheduling reaction speed and scheduling accuracy. The steady-state scheduling reference value provided by historical data can greatly improve the automation capability and response speed of the system, thereby ensuring that the power grid can cope with the acceptance of fluctuating resources such as wind and solar energy, and realize a larger scale integration of renewable energy.

[0076] Furthermore, the power grid new energy acceptance capacity assessment system also includes: The real-time energy acceptance process processing module 400 is used to perform power suppression or boosting processing on the real-time energy acceptance process according to the steady-state power dispatch reference value when accepting the target dispatch interval during the execution of the real-time power acceptance dispatch instruction.

[0077] In the embodiment of the present invention, when the system accepts the target dispatch interval, the real-time power acceptance dispatch process begins to enter a critical stage. The target dispatch interval is usually a period when the grid voltage is prone to fluctuations. During this stage, the system will continuously monitor the real-time power dispatch value and compare it with the preset steady-state power dispatch reference value to ensure the stability of the grid.

[0078] If the system detects that the real-time power dispatch value is higher than the steady-state power dispatch reference value within the target dispatch interval, it indicates that too much power is accepted and the grid voltage may face the risk of rising. To deal with this situation, the system will immediately take power suppression measures. Power suppression may include reducing the amount of wind power or solar power generation, or storing excess power in energy storage devices, such as batteries or flywheel systems, to mitigate the impact of excessive power input on grid stability.

[0079] On the contrary, if the system detects that the real-time power dispatch value is lower than the steady-state power dispatch reference value, it means that the power intake is insufficient and the grid voltage may drop. To this end, the system will perform power boosting. Power boosting is usually done by increasing the intake of renewable energy such as wind and solar power, or releasing the power stored in energy storage devices to make up for the insufficient power input and prevent excessive voltage drop.

[0080] For example, during a certain dispatch period, the system detects that the steady-state power dispatch reference value of the target energy storage area is 100MW. When entering the target dispatch interval, the real-time power dispatch value reaches 120MW. At this time, the system will think that the power acceptance is excessive, resulting in voltage rise. To this end, the system starts power suppression, reduces the acceptance of wind power, or stores excess power in batteries, and adjusts the power dispatch value back to around 100MW to maintain grid stability.

[0081] On the contrary, at another time in the same interval, the real-time power dispatch value is only 80 MW, which is far below the steady-state reference value. At this time, the system determines that the power is insufficient and the grid voltage may drop. The system will take power boosting measures to increase the acceptance of solar power generation or release power from the energy storage system to ensure that the accepted power returns to the steady-state reference value and maintain voltage balance.

[0082] This real-time adjustment mechanism enables the system to react quickly when there is an oversupply or undersupply of electricity, effectively reducing grid voltage fluctuations, and is particularly suitable for dealing with uncertain fluctuations caused by flexible dispatch resources such as wind and solar power. This approach ensures the stability and reliability of the grid when handling renewable energy.

[0083] Through such a power regulation mechanism, the system can respond quickly when there is too much or too little power, and make adjustments based on stable power dispatch reference values ​​in historical data to ensure stable operation of the power grid, especially when dealing with power fluctuations caused by flexible dispatch resources.

[0084] It should be understood that, although each step in the flow chart of each embodiment of the present invention is shown in sequence according to the indication of the arrow, these steps are not necessarily performed in sequence according to the order indicated by the arrow. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be performed in other orders. Moreover, at least a portion of the steps in each embodiment may include a plurality of sub-steps or a plurality of stages, and these sub-steps or stages are not necessarily performed at the same time, but can be performed at different times, and the execution order of these sub-steps or stages is not necessarily performed in sequence, but can be performed in turn or alternately with at least a portion of other steps or sub-steps or stages of other steps.

[0085] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the program can be stored in a non-volatile computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0086] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0087] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

[0088] 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 method for evaluating the new energy acceptance capacity of a power grid, characterized in that: The method comprises: When the target energy storage area receives the real-time power acceptance dispatch instruction, if it is determined that the real-time power acceptance dispatch instruction is a flexible dispatch resource type, the historical energy acceptance file of the target energy storage area is retrieved, and the typical energy acceptance record that best matches the real-time power acceptance dispatch instruction is selected therefrom; Draw the voltage dynamic response curve of the target energy storage area when accepting energy based on typical energy acceptance records, and analyze whether there is significant voltage disturbance in the voltage dynamic response curve; If it is determined that there is a significant voltage disturbance in the voltage dynamic response curve, determine the target dispatching interval of the significant voltage disturbance and the steady-state power dispatching reference value for the significant voltage disturbance; In the process of executing the real-time power acceptance dispatch instruction, when the target dispatch interval is accepted, the real-time energy acceptance process is subjected to power suppression or pressure boosting according to the steady-state power dispatch reference value.

2. The method for evaluating the new energy acceptance capacity of a power grid according to claim 1, characterized in that: When the target energy storage area receives the real-time power acceptance dispatch instruction, if it is determined that the real-time power acceptance dispatch instruction is a flexible dispatch resource type, the steps of retrieving the historical energy acceptance file of the target energy storage area and selecting the typical energy acceptance record that best matches the real-time power acceptance dispatch instruction include: When the target energy storage area receives a real-time power acceptance dispatch instruction, determining whether the real-time power acceptance dispatch instruction is a flexible dispatch resource type; If it is determined that the real-time power acceptance dispatch instruction is a flexible dispatch resource type, the historical energy acceptance file of the target energy storage area is retrieved; The total value of this power dispatch and the specific resource type are determined according to the real-time power acceptance dispatch instruction, and the energy acceptance record with the same specific resource type and the closest to the total value of this power dispatch is selected from the historical energy acceptance archive of the target energy storage area, and this energy acceptance record is set as the typical energy acceptance record.

3. The method for evaluating the new energy acceptance capacity of a power grid according to claim 2, characterized in that: The flexible scheduling resource types include two specific resource types: wind power and solar power.

4. The method for evaluating the new energy acceptance capacity of a power grid according to claim 1, characterized in that: The steps of drawing a voltage dynamic response curve of the target energy storage area when accepting energy based on typical energy acceptance records and analyzing whether there is a significant voltage disturbance in the voltage dynamic response curve include: Obtain data on voltage changes in the target energy storage area during energy acceptance based on typical energy acceptance records; Integrate the data of voltage changes in the target energy storage area during the process of receiving energy, and draw a voltage dynamic response curve; The voltage dynamic response curve is analyzed to check whether there is an inflection point that deviates from the preset amplitude. If so, it is confirmed that there is a significant voltage disturbance in the voltage dynamic response curve.

5. The method for evaluating the new energy acceptance capacity of a power grid according to claim 4, characterized in that: If it is determined that there is a significant voltage disturbance in the voltage dynamic response curve, the step of determining a target dispatching interval of the significant voltage disturbance and a steady-state power dispatching reference value for the significant voltage disturbance includes: If it is determined that there is a significant voltage disturbance in the voltage dynamic response curve, the occurrence time and end time of the significant voltage disturbance are determined, and the target dispatching interval is set according to the occurrence time and end time of the significant voltage disturbance; The voltage dynamic response curve is analyzed, and the power dispatch value closest to the inflection point before and after the inflection point that deviates from the preset amplitude and is in the same equilibrium state is determined, and the power dispatch value is set as the steady-state power dispatch reference value for the significant voltage disturbance.

6. The method for evaluating the new energy acceptance capacity of a power grid according to claim 1, characterized in that: In the process of executing the real-time power acceptance dispatch instruction, when the target dispatch interval is accepted, the step of performing power suppression or pressure boosting processing on the real-time energy acceptance process according to the steady-state power dispatch reference value includes: In the process of executing the real-time power acceptance dispatch instruction, when the target dispatch interval is accepted, it is determined whether the real-time power dispatch value is greater than the steady-state power dispatch reference value; If it is determined that the real-time power dispatch value is greater than the steady-state power dispatch reference value, power suppression processing is performed on the real-time energy acceptance process according to the steady-state power dispatch reference value; If it is determined that the real-time power dispatch value is not greater than the steady-state power dispatch reference value, the real-time energy acceptance process is power-boosted according to the steady-state power dispatch reference value.

7. A system for evaluating the new energy acceptance capacity of a power grid, characterized in that: The system comprises: a typical energy acceptance record determination module, a significant voltage disturbance judgment module, a voltage dynamic response curve analysis module and a real-time energy acceptance process processing module, wherein: A typical energy acceptance record determination module is used to retrieve the historical energy acceptance files of the target energy storage area and select the typical energy acceptance record that best matches the real-time power acceptance dispatch instruction when the target energy storage area receives the real-time power acceptance dispatch instruction, if the real-time power acceptance dispatch instruction is determined to be a flexible dispatch resource type; A significant voltage disturbance judgment module is used to draw a voltage dynamic response curve of the target energy storage area when accepting energy based on typical energy acceptance records, and analyze whether there is a significant voltage disturbance in the voltage dynamic response curve; A voltage dynamic response curve analysis module is used to determine a target dispatching interval of the significant voltage disturbance and a steady-state power dispatching reference value for the significant voltage disturbance if it is determined that there is a significant voltage disturbance in the voltage dynamic response curve; The real-time energy acceptance process processing module is used to suppress power or boost the real-time energy acceptance process according to the steady-state power dispatch reference value when accepting the target dispatch interval during the execution of the real-time power acceptance dispatch instruction.

8. A power grid new energy acceptance capacity assessment system according to claim 7, characterized in that: The typical energy acceptance record determination module specifically includes: A flexible scheduling resource type determination unit, configured to determine whether the real-time power receiving and dispatching instruction is a flexible scheduling resource type when the target energy storage area receives the real-time power receiving and dispatching instruction; A historical energy acceptance file retrieval unit, used to retrieve the historical energy acceptance file of the target energy storage area if it is determined that the real-time power acceptance dispatch instruction is a flexible dispatch resource type; A typical energy acceptance record determination unit is used to determine the total value of this power dispatch and the specific resource type according to the real-time power acceptance dispatch instruction, and select the energy acceptance record with the same specific resource type and the closest to the total value of this power dispatch from the historical energy acceptance archive of the target energy storage area, and set this energy acceptance record as the typical energy acceptance record; The flexible scheduling resource types include two specific resource types: wind power and solar power.

9. A power grid new energy acceptance capacity assessment system according to claim 8, characterized in that: The significant voltage disturbance judgment module specifically includes: A voltage change data acquisition unit, used to acquire data on voltage changes in the target energy storage area during the process of accepting energy according to typical energy acceptance records; A voltage dynamic response curve drawing unit is used to integrate the data of voltage changes in the target energy storage area during the process of receiving energy and draw a voltage dynamic response curve; The significant voltage disturbance judgment unit is used to analyze the voltage dynamic response curve to check whether there is an inflection point that deviates from a preset amplitude. If so, it is confirmed that there is a significant voltage disturbance in the voltage dynamic response curve.

10. A power grid new energy acceptance capacity assessment system according to claim 9, characterized in that: The voltage dynamic response curve analysis module specifically includes: A target dispatch interval determination unit is used to determine the occurrence time and end time of the significant voltage disturbance if it is determined that there is a significant voltage disturbance in the voltage dynamic response curve, and set the target dispatch interval according to the occurrence time and end time of the significant voltage disturbance; The steady-state power dispatch reference value determination unit is used to analyze the voltage dynamic response curve, and determine the power dispatch value closest to the inflection point before and after the inflection point that deviates from the preset amplitude and is in the same equilibrium state, and set the power dispatch value as the steady-state power dispatch reference value for the significant voltage disturbance.

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