Virtual synchronous motor energy storage charging and discharging adjusting method and system

Abstract

The invention relates to the technical field of electric power systems, and particularly discloses a virtual synchronous motor energy storage charging and discharging adjusting method and system which are applied to an alternating-current and direct-current hybrid micro-grid, the alternating-current and direct-current hybrid micro-grid comprises an alternating-current bus, and a virtual synchronous motor is connected with the alternating-current bus. The method comprises the steps that multiple pieces of real-time load change information of an alternating current bus are acquired, and the real-time load change information comprises real-time active load information and real-time reactive load information; real-time load change information is acquired through dynamic time resolution, coupling calculation is performed based on state variables, a time change curve is established, to-be-adjusted load data and adjustment direction information are acquired, accurate real-time adjustment parameters are generated according to load peak and valley periods, and a virtual synchronous motor is controlled to discharge and charge. According to the method, the real-time response capability and the data accuracy of the AC / DC hybrid micro-grid are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and in particular to a virtual synchronous motor energy storage charging and discharging regulation method and system. Background Art

[0002] Virtual synchronous motor (VSM) improves the stability and reliability of power systems by simulating the dynamic behavior of traditional synchronous generators. Its flexible control strategy, fast dynamic response capability and wide range of application scenarios make it an indispensable key technology in modern power systems. By optimizing energy management and dynamic response, VSM plays an important role in renewable energy grid connection, microgrids, distributed energy systems and power system stability.

[0003] The existing virtual synchronous motor energy storage charging and discharging regulation method has deficiencies in the rapidity and accuracy of coping with load changes in AC / DC hybrid microgrids, especially during the switching process between load peak and trough periods. It is impossible to adjust the charging and discharging strategy in a timely and accurate manner, resulting in a delayed system response and affecting the overall operating efficiency and stability. Summary of the invention

[0004] The object of the present invention is to provide a virtual synchronous motor energy storage charging and discharging regulation method and system to solve the technical problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A virtual synchronous motor energy storage charging and discharging regulation method is applied to an AC / DC hybrid microgrid, wherein the AC / DC hybrid microgrid includes an AC bus, and the virtual synchronous motor is connected to the AC bus. The method includes: Acquire multiple real-time load change information of the AC bus, wherein the real-time load change information includes real-time active load information and real-time reactive load information; Based on the state variable principle, a plurality of real-time load change information are coupled and calculated to obtain a plurality of dynamic load change data, and a time change curve is established according to the plurality of dynamic load change data; Acquire a plurality of load data to be regulated according to the time variation curve, wherein the load data to be regulated includes active load variation data to be regulated and reactive load variation data to be regulated; Detecting adjustment direction information of the AC bus according to the load data to be adjusted, wherein the adjustment direction information includes a load peak period direction and a load valley period direction; If the AC bus is in the direction of the load peak period, obtaining first load demand adjustment information of the AC bus according to the direction of the load peak period; controlling the virtual synchronous motor to discharge according to the first load demand adjustment information; If the AC bus is in a load valley period, obtaining second load demand adjustment information of the AC bus according to the load valley period; The virtual synchronous motor is controlled to charge according to the second load demand adjustment information.

[0006] Preferably, the step of obtaining multiple real-time load change information of the AC bus includes: Obtaining dynamic time resolution of a plurality of the AC subnets and a plurality of DC subnets; Acquire the initial load acquisition time intervals corresponding to the plurality of AC subnets and the plurality of DC subnets according to the dynamic time resolution; Based on the initial load acquisition time interval, the AC subnet active power and the AC subnet reactive power corresponding to each AC subnet, and the DC subnet active power and the DC subnet reactive power corresponding to each DC subnet are collected; Obtaining the active power and reactive power of all the AC subnets to obtain the total active power and reactive power of the AC subnets; Obtaining all the DC subnet active power and DC subnet reactive power to obtain the total DC subnet active power and total DC subnet reactive power; Obtaining the total transmission active power and the total transmission reactive power of the AC bus according to the total AC subnet active power and the total DC subnet active power, the total AC subnet reactive power and the total DC subnet reactive power; Acquire the total transmitted active power and the total transmitted reactive power of the AC bus in multiple time intervals based on the initial load acquisition time interval; The total transmitted active power and the total transmitted reactive power in all the time intervals are acquired to obtain real-time load change data.

[0007] Preferably, the step of performing coupling calculation on the multiple real-time load change information based on the state variable principle to obtain multiple dynamic load change data includes: Acquire state variables of the AC bus, wherein the state variables include voltage and frequency; Acquire a load variable timestamp according to the load acquisition time interval, and acquire multiple load variable time points according to the load variable timestamp; Obtaining the real-time active load information at each load variable time point and the active voltage sensitivity value and active frequency sensitivity value corresponding to the voltage and frequency; and obtaining active load change data according to a plurality of load variable time points, active voltage sensitive values ​​and active frequency sensitive values; Obtain the real-time reactive load information at each load variable time point and the reactive voltage sensitivity value and reactive frequency sensitivity value corresponding to the voltage and frequency; and obtaining reactive load change data according to a plurality of load variable time points, reactive voltage sensitive values ​​and reactive frequency sensitive values; The active load change data and the reactive load change data are coupled and calculated according to each load variable time point to obtain a plurality of dynamic load change data.

[0008] Preferably, the step of acquiring a plurality of load data to be adjusted according to the time variation curve comprises: Acquiring active load change data and reactive load change data exceeding a preset interval according to the time change curve; Obtaining load variable time points of active load change data and reactive load change data exceeding a preset interval, and using the load variable time points as time points to be adjusted; Acquire an adjustment start time point and an adjustment end time point according to the plurality of time points to be adjusted; Obtaining corresponding active load change data and reactive load change data according to the adjustment start time point and the adjustment end time point, and using them as the active load change data to be adjusted and the reactive load change data to be adjusted; All the active load change data to be regulated and the reactive load change data to be regulated are acquired to obtain a plurality of load data to be regulated.

[0009] Preferably, the step of detecting the adjustment direction information of the AC bus according to the load data to be adjusted includes: Acquiring an active load change value according to the active load change data to be adjusted; Determining whether the active load change value is greater than a preset load change standard phase interval; If the active load change value is greater than the maximum value of the preset load change standard phase interval, it is determined that the AC bus inputs active power to the virtual synchronous motor, and a charging direction signal of the AC bus to the virtual synchronous motor is generated; If the active load change value is less than the preset load change standard phase interval minimum value, it is determined that the AC bus needs a virtual synchronous motor to input active power, and a discharge direction signal of the virtual synchronous motor to the AC bus is generated; Acquiring a reactive load change value according to the reactive load change data to be adjusted; Determining whether the reactive load change value is greater than a preset load change standard phase interval; If the reactive load change value is greater than the preset load change standard phase interval maximum value, it is determined that the AC bus needs to reduce reactive power output, and a reactive power output reduction signal for the AC bus is generated; If the reactive load change value is less than the preset load change standard phase interval minimum value, it is determined that the AC bus needs to increase reactive power output, and an increase reactive power output signal of the AC bus is generated; The discharge direction signal, the charge direction signal, the reactive power output reduction signal and the reactive power output increase signal are concentrated to obtain the regulation direction information.

[0010] Preferably, the step of obtaining the first load demand adjustment information of the AC bus according to the load peak time period direction includes: Obtaining a load demand value according to the active load change value; Obtain the real-time output active power of the virtual synchronous motor; Obtaining an output power deviation value of the virtual synchronous motor according to the load demand value and the real-time output active power; The first load demand adjustment information is generated by using the discharge direction signal and the charge direction signal as the adjustment direction and the output power deviation value as the adjustment amount.

[0011] The present invention also discloses a virtual synchronous motor energy storage charging and discharging regulation system, which is applied to an AC / DC hybrid microgrid. The AC / DC hybrid microgrid includes an AC bus, and the virtual synchronous motor is connected to the AC bus, including: A first acquisition module is used to acquire multiple real-time load change information of the AC bus, wherein the real-time load change information includes real-time active load information and real-time reactive load information; A second acquisition module is used to perform coupling calculation on the multiple real-time load change information based on the state variable principle to obtain multiple dynamic load change data, and establish a time change curve according to the multiple dynamic load change data; A third acquisition module is used to acquire a plurality of load data to be regulated according to the time variation curve, wherein the load data to be regulated includes active load variation data to be regulated and reactive load variation data to be regulated; A fourth acquisition module, configured to detect adjustment direction information of the AC bus according to the load data to be adjusted, wherein the adjustment direction information includes a direction during a load peak period and a direction during a load valley period; A fifth acquisition module is used to obtain the direction of the AC bus in the peak load period, and obtain the first load demand adjustment information of the AC bus according to the direction of the peak load period; controlling the virtual synchronous motor to discharge according to the first load demand adjustment information; A sixth acquisition module, used to acquire the direction of the AC bus being in a load valley period, and acquire the second load demand adjustment information of the AC bus according to the direction of the load valley period; The virtual synchronous motor is controlled to charge according to the second load demand adjustment information.

[0012] Preferably, the second acquisition module includes: A first acquisition unit, used to acquire the dynamic time resolution of the plurality of AC subnets and the plurality of DC subnets; A second acquisition unit is used to acquire the initial load acquisition time intervals corresponding to the plurality of AC subnets and the plurality of DC subnets according to the dynamic time resolution; A third acquisition unit is used to collect the AC subnet active power and the AC subnet reactive power corresponding to each AC subnet, and the DC subnet active power and the DC subnet reactive power corresponding to each DC subnet based on the initial load acquisition time interval; A fourth acquisition unit is used to acquire the active power and reactive power of all the AC subnets to obtain the total AC subnet active power and the total AC subnet reactive power; A fifth acquisition unit, used to acquire the active power and reactive power of all the DC subnets to obtain the total DC subnet active power and the total DC subnet reactive power; A sixth acquisition unit, configured to acquire the total transmission active power and the total transmission reactive power of the AC bus according to the total AC subnet active power and the total DC subnet active power, the total AC subnet reactive power and the total DC subnet reactive power; A seventh acquisition unit, configured to acquire the total transmitted active power and the total transmitted reactive power of the AC bus at multiple time intervals based on the initial load acquisition time interval; The eighth acquisition unit is used to acquire the total transmission active power and the total transmission reactive power of all the time intervals to obtain real-time load change data.

[0013] The present invention also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above-mentioned virtual synchronous motor energy storage charging and discharging regulation method when executing the computer program.

[0014] The present invention also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the above-mentioned virtual synchronous motor energy storage charging and discharging regulation method are implemented.

[0015] The beneficial effects of the present application are as follows: the present invention obtains real-time load change information through dynamic time resolution, performs coupling calculation based on state variables, establishes time change curves, obtains load data to be adjusted and adjustment direction information, and generates accurate real-time adjustment parameters according to load peak and valley periods, and controls virtual synchronous motors for discharge and charging. This method significantly improves the real-time response capability and data accuracy of AC / DC hybrid microgrids, ensures the stability and efficiency of the system, solves the problems of incomplete data, slow response, and inaccurate adjustment in traditional methods, and provides strong technical support for the efficient operation of microgrids. Specifically, dynamic time resolution ensures the real-time and accuracy of data, coupling calculation and time change curves provide comprehensive load change data support, load data to be adjusted and adjustment direction information ensure the pertinence and effectiveness of adjustment, and accurate adjustment parameters during load peak and valley periods improve the efficiency of discharge and charging, thereby avoiding system instability and inefficiency caused by untimely or inaccurate adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure is a schematic diagram of a method flow of an embodiment of the present application.

[0017] Figure 2 A schematic diagram of the system structure of an embodiment of the present application.

[0018] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0019] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0020] like Figure 1 As shown, the present application provides a virtual synchronous motor energy storage charging and discharging regulation method, which is applied to an AC / DC hybrid microgrid, wherein the AC / DC hybrid microgrid includes an AC bus, and the virtual synchronous motor is connected to the AC bus. The method includes: S1. Acquire multiple real-time load change information of the AC bus, wherein the real-time load change information includes real-time active load information and real-time reactive load information; S2. Based on the state variable principle, a plurality of real-time load change information are coupled and calculated to obtain a plurality of dynamic load change data, and a time change curve is established according to the plurality of dynamic load change data; S3. Acquire a plurality of load data to be regulated according to the time variation curve, wherein the load data to be regulated includes active load variation data to be regulated and reactive load variation data to be regulated; S4. Detecting the adjustment direction information of the AC bus according to the load data to be adjusted, wherein the adjustment direction information includes the direction during the load peak period and the direction during the load valley period; S5. If the AC bus is in the direction of the load peak period, obtain first load demand adjustment information of the AC bus according to the direction of the load peak period; controlling the virtual synchronous motor to discharge according to the first load demand adjustment information; S6. If the AC bus is in a load valley period, obtain second load demand adjustment information of the AC bus according to the load valley period; The virtual synchronous motor is controlled to charge according to the second load demand adjustment information.

[0021] As described in the above steps S1-S6, with the rapid development of social economy and the enhancement of environmental awareness, renewable energy such as wind energy and solar energy are increasingly widely used in power systems. However, the intermittent and instability of these renewable energy sources poses a challenge to the stable operation of the power grid, especially in AC / DC hybrid microgrids. Due to the use of a large number of power electronic equipment, the system is prone to "weak damping, low inertia" problems, resulting in voltage and frequency fluctuations, affecting the safety and reliability of the system. The AC / DC hybrid microgrid combines the advantages of AC microgrids and DC microgrids, and can better access various distributed power sources and loads, improving the flexibility and efficiency of the system. However, due to the distributed power source ( The output power of microgrids (such as photovoltaic and wind power generation) is greatly affected by weather conditions and has strong randomness and volatility, which causes the DC bus voltage and AC bus frequency in the microgrid to fluctuate easily. Existing energy storage systems and control methods are often difficult to cope with these rapidly changing load demands. The AC / DC hybrid microgrid includes multiple AC subgrids, an AC bus and multiple DC subgrids, and a DC bus. The multiple AC subgrids are connected to the AC bus through a bidirectional DC / AC inverter, and the multiple DC subgrids are connected to the DC bus through a bidirectional DC / AC inverter. The DC bus is connected to the AC bus through a bidirectional DC / AC inverter, and the virtual synchronous motor is connected to the AC bus through a bidirectional converter.

[0022] By acquiring the dynamic time resolution of multiple AC subnets and DC subnets, the present invention can accurately capture the real-time load changes on the AC bus, ensure the accuracy of the subsequent control strategy, and solve the problem that the traditional fixed time resolution cannot adapt to the rapidity and diversity of load changes. At the same time, the real-time active load information and real-time reactive load information are obtained, providing comprehensive data support for subsequent coupling calculations, overcoming the limitations of single load information, ensuring the integrity of the data, and coupling calculations of real-time active load information and real-time reactive load information based on state variables (such as voltage and frequency), which can quickly respond to load changes, improve the dynamic performance of the system, and solve the problem of slow response speed of traditional single variable control methods. By establishing a time change curve, the data can be visualized, which is convenient for subsequent analysis and decision-making, and overcomes the defects of data dispersion and difficulty in comprehensive analysis. According to the time variation curve, the load data that needs to be regulated is accurately identified, and the load data to be regulated is subdivided into active load and reactive load, which is convenient for targeted regulation. It solves the errors caused by incomplete data or improper processing in traditional load identification methods, as well as the poor regulation effect caused by extensive management. After that, by obtaining the regulation direction information, the regulation direction of the AC bus is clarified, which provides clear guidance for subsequent control and solves the problem of ineffective or counterproductive control measures caused by the lack of clear regulation direction information. Distinguishing between peak load periods and valley periods, and flexibly adjusting the control strategy improves the flexibility and adaptability of the system, and overcomes the defect that fixed control strategies are difficult to adapt to the diversity and uncertainty of load changes. During the peak load period, according to the direction of the peak load period, the first load demand regulation information is quickly obtained, the working state of the virtual synchronous motor is adjusted in time, and the virtual synchronous motor is controlled to discharge efficiently to relieve the peak load pressure, which solves the problem that the traditional control method responds slowly during the peak load period, which may cause system overload or voltage instability. Through the control based on the first load demand adjustment information, the discharge efficiency is improved, and the problem of low discharge efficiency caused by the lack of precise adjustment parameters is overcome. Then, during the load valley period, the second load demand adjustment information is reasonably obtained to make full use of the electric energy during the valley period, solving the problem of waste of resources caused by the failure to reasonably use electric energy during the load valley period. Through the control based on the second real-time adjustment parameter, the virtual synchronous motor is controlled to charge efficiently to reserve energy for the load peak period, solving the problem of low charging efficiency caused by the lack of precise adjustment parameters. In summary, the method and system achieve precise management of AC / DC hybrid microgrids through precise time resolution, comprehensive load information, fast coupling calculation, clear adjustment direction, flexible control strategy and efficient charging and discharging control.

[0023] In one embodiment, the step of obtaining multiple real-time load change information of the AC bus includes: S101, obtaining dynamic time resolutions of a plurality of AC subnets and a plurality of DC subnets; S102, obtaining the initial load acquisition time intervals corresponding to the plurality of AC subnets and the plurality of DC subnets according to the dynamic time resolution; S103, collecting the AC subnet active power and the AC subnet reactive power corresponding to each AC subnet, and the DC subnet active power and the DC subnet reactive power corresponding to each DC subnet based on the initial load acquisition time interval; S104, acquiring the active power and reactive power of all the AC subnets to obtain the total active power and reactive power of the AC subnets; S105, acquiring the active power and reactive power of all the DC subnets to obtain the total DC subnet active power and reactive power; S106. Obtain the total transmission active power and the total transmission reactive power of the AC bus according to the total AC subnet active power and the total DC subnet active power, the total AC subnet reactive power and the total DC subnet reactive power; S107, acquiring the total transmitted active power and the total transmitted reactive power of the AC bus in multiple time intervals based on the initial load acquisition time interval; S108. Obtain the total transmitted active power and the total transmitted reactive power in all the time intervals to obtain real-time load change data.

[0024] As described in the above steps S101-S108, the present invention can realize accurate data collection and processing of AC / DC hybrid microgrids, significantly improve the real-time response capability of the system and the accuracy of data, and effectively solve various problems existing in traditional control methods. Specifically, first, by obtaining the dynamic time resolution of multiple AC subnets and DC subnets, the load changes of each subnet can be accurately captured, ensuring the accuracy of subsequent data collection and processing, and solving the problem that the traditional fixed time resolution cannot adapt to the rapidity and diversity of load changes. The dynamic time resolution can be adjusted according to actual conditions to adapt to the speed and frequency of different load changes, avoiding inaccurate data collection, and then by obtaining the initial load acquisition time interval, a unified standard is provided for subsequent data collection to ensure the consistency and comparability of the data, solving the problem of inconsistent and incomparable data collection caused by the lack of a unified time interval standard. Reasonable time interval settings can reduce unnecessary data collection times while ensuring data accuracy, improve system efficiency, and avoid the problem of frequent data collection increasing system burden and wasting resources. Based on the initial load acquisition time interval, the active power and reactive power of each AC subnet and DC subnet are collected to provide comprehensive data support for subsequent load analysis and adjustment, solving the problem that only collecting active power or reactive power cannot fully reflect the actual operating status of the subnet. Real-time data collection ensures the timeliness of data and avoids data delays affecting the real-time response capability of the system. After that, the active power and reactive power of all AC subnets and DC subnets are summarized to form the total active power and reactive power, providing a global perspective of the entire subnet, helping to identify and solve problems, and solving the problem that only focusing on the data of a single subnet cannot form a global perspective and discover overall system problems. The scattered data are aggregated to facilitate comprehensive analysis, avoiding the impact of data dispersion on the accuracy of decision-making. Then, the total transmission active power and reactive power of the AC bus are obtained by combining the data of the total AC subnet and the total DC subnet, providing comprehensive data support for subsequent load regulation, solving the problem that only focusing on the data of a single subnet cannot be comprehensively analyzed from the system level. Analyzing and adjusting the load from the system level improves the overall performance of the system and avoids the poor regulation effect caused by local analysis and data isolation. Then, based on the initial load acquisition time interval, the total transmission active power and reactive power of multiple time intervals are obtained to form time series data, which is convenient for trend analysis and prediction, solving the problem that trend analysis and prediction cannot be performed by relying only on data at a single time point. Real-time monitoring of system load changes, timely discovery and resolution of problems, avoiding insufficient dynamic monitoring caused by static analysis and data isolation, and finally, through data at multiple time intervals, real-time load change data is formed to achieve real-time monitoring of system load, providing important decision support for system operation and regulation, solving the problem of data lag and decision errors that may be caused by non-real-time data collection and processing.Real-time load change data provides an important basis for system operation and regulation, and improves system stability and reliability.

[0025] In one embodiment, the step of performing coupling calculation on the multiple real-time load change information based on the state variable principle to obtain multiple dynamic load change data includes: S201, obtaining state variables of an AC bus, wherein the state variables include voltage and frequency; S202, acquiring a load variable timestamp according to the load acquisition time interval, and acquiring a plurality of load variable time points according to the load variable timestamp; S203, obtaining the real-time active load information of each load variable time point and the active voltage sensitivity value and active frequency sensitivity value corresponding to the voltage and frequency; S204, acquiring active load change data according to a plurality of load variable time points, active voltage sensitive values ​​and active frequency sensitive values; S205, obtaining the real-time reactive load information of each load variable time point and the reactive voltage sensitivity value and reactive frequency sensitivity value corresponding to the voltage and frequency; S206, acquiring reactive load change data according to a plurality of load variable time points, reactive voltage sensitive values ​​and reactive frequency sensitive values; S207: performing coupling calculation on the active load change data and the reactive load change data according to each load variable time point to obtain a plurality of dynamic load change data.

[0026] As described in the above steps S201-S207, the present invention can achieve accurate state variable acquisition and load change analysis of the AC / DC hybrid microgrid through the above steps, significantly improving the real-time response capability of the system and the accuracy of the data, and effectively solving various problems existing in the traditional control method. Specifically, by obtaining the state variables (such as voltage and frequency) of the AC bus, the operating state of the system can be accurately reflected, providing basic data for subsequent load analysis and regulation, solving the problem that the traditional method may only focus on a single state variable and cannot fully reflect the operating state of the system. Voltage and frequency are key indicators for measuring system stability. Obtaining these two state variables helps to comprehensively evaluate the operating status of the system, avoiding errors caused by incomplete data and insufficient precision. Then, by obtaining the timestamp and time point of the load variable, a time series is formed, which is convenient for trend analysis and prediction, solving the problem that the traditional method may only collect data at a specific time point, resulting in discontinuous data and affecting the accuracy of analysis. Acquire multiple load variable time points in real time to ensure the real-time and continuity of data, improve the dynamic response capability of the system, and avoid the impact of data lag on the real-time response capability of the system. Then, by acquiring the real-time active load information of each load variable time point and the active voltage sensitive value and active frequency sensitive value corresponding to the voltage and frequency, sensitivity analysis can be performed to understand the impact of load changes on the system voltage and frequency, solving the problem that the traditional method lacks sensitive value data, resulting in extensive control strategies and difficulty in accurately adjusting the system state. Through the calculation of sensitive values, the active load of the system can be controlled more accurately, the stability of the system can be improved, and the slow response can be avoided. The dynamic performance of the system is affected. Then, through multiple load variable time points, active voltage sensitive values ​​and active frequency sensitive values, active load change data can be obtained, which can reflect the dynamic change trend of active load, solving the problem that the traditional method only relies on data at a single time point and cannot perform dynamic change analysis, affecting the effectiveness of the control strategy. Active load change data provides an important basis for subsequent trend analysis and prediction, helps to formulate more effective control strategies, avoids the impact of isolated data on the accuracy of decision-making, and then obtains the real-time reactive load information at each load variable time point and the reactive voltage sensitive value and reactive frequency sensitive value corresponding to the voltage and frequency, so as to conduct a comprehensive sensitivity analysis and understand the impact of reactive load changes on the system, solving the problem that the traditional method lacks sensitive value data, resulting in extensive control strategies and difficulty in accurately adjusting the system state. Through the calculation of sensitive values, the reactive load of the system can be controlled more accurately, the stability of the system can be improved, and the slow response can be avoided to affect the dynamic performance of the system. Through multiple load variable time points, reactive voltage sensitive values ​​and reactive frequency sensitive values, the reactive load change data can be obtained, which can reflect the dynamic change trend of the reactive load, solving the problem that the traditional method only relies on data at a single time point, cannot perform dynamic change analysis, and affects the effectiveness of the control strategy.Reactive load change data provides an important basis for subsequent trend analysis and prediction, helps formulate more effective control strategies, and avoids the impact of isolated data on the accuracy of decision-making. Finally, through the coupled calculation of active load change data and reactive load change data at each load variable time point, it can fully reflect the dynamic load change of the system, solving the problem that traditional methods only focus on the individual changes of active load or reactive load, and cannot conduct comprehensive system analysis, which affects the mediation effect. Comprehensive analysis at the system level helps identify and solve problems, improves the overall performance of the system, and avoids the impact of isolated data on the accuracy of decision-making.

[0027] In one embodiment, the step of acquiring a plurality of load data to be regulated according to the time variation curve includes: S301, acquiring active load change data and reactive load change data exceeding a preset interval according to the time change curve; S302, obtaining load variable time points that exceed the active load change data and reactive load change data within a preset interval, and using the load variable time points as time points to be adjusted; S303, acquiring an adjustment start time point and an adjustment end time point according to the plurality of time points to be adjusted; S304, acquiring corresponding active load change data and reactive load change data according to the adjustment start time point and the adjustment end time point, and using them as the active load change data to be adjusted and the reactive load change data to be adjusted; S305, acquiring all the active load change data to be regulated and the reactive load change data to be regulated, and obtaining a plurality of load data to be regulated.

[0028] As described in the above steps S301-S305, the present invention can realize accurate load change detection and regulation of AC / DC hybrid microgrids through the above steps, significantly improve the regulation efficiency of the system and the accuracy of data, and effectively solve various problems existing in traditional regulation methods. Specifically, by obtaining active load change data and reactive load change data exceeding the preset interval through the time change curve, abnormal load changes can be detected in time, providing a basis for subsequent regulation, and solving the problem of misjudgment risk and data redundancy caused by the traditional method that may not be able to distinguish between normal and abnormal load changes. By obtaining the load variable time point exceeding the preset interval and using it as the time point to be adjusted, it is helpful to accurately locate the time period that needs to be adjusted, and solves the time ambiguity and operation redundancy caused by the traditional method that may not accurately determine the time point that needs to be adjusted. Through multiple time points to be adjusted, the adjustment start time point and the adjustment end time point are obtained, and a clear adjustment time window is defined, which is helpful to adjust within an appropriate time period, and solves the time uncertainty and adjustment conflict problems caused by the traditional method that may not be able to determine the specific adjustment time period. By adjusting the start time and the end time, the corresponding active load change data and reactive load change data are obtained to ensure the accuracy and relevance of the adjustment data, which solves the data mismatch and rough adjustment problems caused by the traditional method of using mismatched data for adjustment. By obtaining all the active load change data to be adjusted and the reactive load change data to be adjusted, multiple load data to be adjusted are formed. The load data to be adjusted is the load data that needs to be adjusted extracted from the time change curve, including active load change data and reactive load change data, and the load variable time points corresponding to these data. These data are used to accurately identify the time points that need to be adjusted and the specific load changes, formulate specific adjustment strategies, ensure the stability and efficiency of the system, and provide comprehensive data support for subsequent comprehensive analysis and adjustment, which solves the data isolation and local perspective problems caused by the traditional method that may only focus on the data at a single time point.

[0029] In one embodiment, the step of detecting the adjustment direction information of the AC bus according to the load data to be adjusted includes: S401, obtaining an active load change value according to the active load change data to be adjusted; S402, determining whether the active load change value is greater than a preset load change standard phase interval; S403, if the active load change value is greater than the preset load change standard phase interval maximum value, it is determined that the AC bus performs active power input to the virtual synchronous motor, and a charging direction signal of the AC bus to the virtual synchronous motor is generated; S404: If the active load change value is less than the preset load change standard phase interval minimum value, it is determined that the AC bus needs a virtual synchronous motor to input active power, and a discharge direction signal of the virtual synchronous motor to the AC bus is generated; S405, obtaining a reactive load change value according to the reactive load change data to be adjusted; S406, determining whether the reactive load change value is greater than a preset load change standard phase interval; If the reactive load change value is greater than the preset load change standard phase interval maximum value, it is determined that the AC bus needs to reduce reactive power output, and a reactive power output reduction signal for the AC bus is generated; If the reactive load change value is less than the preset load change standard phase interval minimum value, it is determined that the AC bus needs to increase reactive power output, and an increase reactive power output signal of the AC bus is generated; S407: Collect the discharge direction signal, the charge direction signal, the reactive power output reduction signal, and the reactive power output increase signal to obtain adjustment direction information.

[0030] As described in the above steps S401-S407, the present invention can realize accurate detection and regulation of active and reactive load changes of AC / DC hybrid microgrids through the above steps, significantly improve the regulation efficiency of the system and the accuracy of data, and effectively solve various problems existing in traditional regulation methods. Specifically, by obtaining the active load change value, the change of active load can be accurately quantified, providing accurate data support for subsequent judgment and regulation, and solving the problem of data ambiguity caused by the inability of traditional methods to accurately quantify active load changes. By judging whether the active load change value exceeds the preset load change standard phase interval, the situation that needs to be adjusted can be effectively identified, avoiding unnecessary adjustment operations, and solving the risk of misjudgment caused by the inability of traditional methods to accurately judge whether the active load change has reached the level that needs to be adjusted. By generating clear charging and discharging direction signals, the AC bus is instructed to input active power to the virtual synchronous motor and the virtual synchronous motor to the AC bus, respectively, to ensure the accuracy and effectiveness of the adjustment operation, solving the problem of operation ambiguity caused by the traditional method that may not clearly indicate the charging and discharging directions. By obtaining the reactive load change value, the change of reactive load can be accurately quantified, providing accurate data support for subsequent judgment and adjustment, solving the problem of data ambiguity caused by the traditional method that may not accurately quantify the reactive load change. By judging whether the reactive load change value exceeds the preset load change standard phase interval, the situation that needs adjustment can be effectively identified, avoiding unnecessary adjustment operations, and solving the risk of misjudgment caused by the traditional method that may not accurately judge whether the reactive load change has reached the level that needs adjustment. By centrally generating comprehensive regulation direction information, the discharge direction signal, charging direction signal, reactive power reduction output signal and reactive power increase output signal are comprehensively processed to ensure the comprehensiveness and coordination of the regulation operation. The discharge direction signal: when the active load change value is less than the preset load change standard phase interval minimum value, the generated signal indicates that the virtual synchronous motor inputs active power to the AC bus. The charging direction signal: when the active load change value is greater than the preset load change standard phase interval maximum value, the generated signal indicates that the AC bus inputs active power to the virtual synchronous motor. The reactive power reduction output signal: when the reactive load change value is greater than the preset load change standard phase interval maximum value, the generated signal indicates that the AC bus reduces reactive power output. The reactive power increase output signal: when the reactive load change value is less than the preset load change standard phase interval minimum value, the generated signal indicates that the AC bus increases reactive power output. Then, the collected signals are verified to ensure that their generation conditions are met, and time synchronization is performed to ensure that the timestamps of all signals are consistent. Then, according to the system priority setting, determine which signals are processed first, for example, active power regulation usually takes precedence over reactive power regulation.Through logical judgment, the final adjustment direction is determined. For example, if the discharge direction signal and the reactive power output reduction signal are received at the same time, the active power adjustment can be processed first, and then the reactive power adjustment; if conflicting signals (such as the discharge direction signal and the charging direction signal) are received, the most appropriate adjustment direction needs to be selected according to the current state and priority setting of the system. Finally, based on the results of comprehensive processing, the final adjustment direction information is generated, including the active power adjustment direction and the reactive power adjustment direction, and this information is applied to the system to generate specific adjustment parameters, which are sent to the control system of the virtual synchronous motor to perform specific adjustment operations to ensure that the system can respond quickly and maintain stability when the load changes.

[0031] In one embodiment, the step of obtaining the first load demand adjustment information of the AC bus according to the load peak period direction includes: S501, obtaining a load demand value according to the active load change value; S502, obtaining the real-time output active power of the virtual synchronous motor; S503, obtaining an output power deviation value of the virtual synchronous motor according to the load demand value and the real-time output active power; S504: Generate first load demand adjustment information by using the discharge direction signal and the charge direction signal as adjustment directions and the output power deviation value as an adjustment amount.

[0032] As described in the above steps S501-S504, the present invention can realize accurate active power regulation of virtual synchronous motors in AC / DC hybrid microgrids through the above steps, significantly improve the regulation efficiency of the system and the accuracy of data, and effectively solve various problems existing in traditional regulation methods. Specifically, by obtaining the load demand value through the active load change value, it is possible to accurately reflect the active power required by the current system, and solve the problem of unclear demand caused by the traditional method that may not be able to accurately calculate the load demand value. By obtaining the real-time output active power of the virtual synchronous motor, the operating status of the motor can be monitored in real time, and the data lag problem caused by the traditional method that may rely on historical data or estimated data is solved. The output power deviation value is calculated by the load demand value and the real-time output active power, and the active power load demand value required by the current system is calculated according to the active load change value. For example, if the active load change value is positive, it means that the system needs more active power; if the active load change value is negative, it means that the system needs to reduce active power, and then the current output active power value of the virtual synchronous motor is obtained in real time, and then the output power deviation value is obtained by subtracting the real-time output active power value obtained in the above step from the load demand value calculated in the above step, so as to accurately quantify the power supply and demand difference of the current system, and solve the problem of inaccurate regulation caused by the inability of the traditional method to accurately calculate the output power deviation value. The adjustment direction is determined by the discharge direction signal and the charging direction signal, and the first load demand adjustment information is generated in combination with the output power deviation value, so as to accurately control the output power of the virtual synchronous motor, and solve the problem of blind regulation caused by the lack of clear adjustment direction and specific adjustment amount in the traditional method. These steps jointly improve the regulation efficiency of the system and the accuracy of the data, ensure the stability and efficiency of the system, and provide strong technical support for the efficient operation of the AC / DC hybrid microgrid. Through these steps, the system can respond quickly when the load changes, ensure that the output power of the virtual synchronous motor is always consistent with the system demand, and avoid the system instability and inefficiency caused by untimely or inaccurate regulation.

[0033] Specifically, the method for acquiring the second load demand adjustment information is the same as the method for acquiring the first load demand adjustment information, so no further description is given here.

[0034] like Figure 2 As shown, the present invention also provides a virtual synchronous motor energy storage charging and discharging regulation system, comprising: A first acquisition module 1 is used to acquire multiple real-time load change information of the AC bus, wherein the real-time load change information includes real-time active load information and real-time reactive load information; A second acquisition module 2 is used to perform coupling calculation on the multiple real-time load change information based on the state variable principle to obtain multiple dynamic load change data, and establish a time change curve according to the multiple dynamic load change data; A third acquisition module 3 is used to acquire a plurality of load data to be regulated according to the time variation curve, wherein the load data to be regulated includes active load variation data to be regulated and reactive load variation data to be regulated; A fourth acquisition module 4 is used to detect the adjustment direction information of the AC bus according to the load data to be adjusted, wherein the adjustment direction information includes the direction of the load peak period and the direction of the load valley period; A fifth acquisition module 5 is used to obtain the direction of the AC bus in the peak load period, and obtain the first load demand adjustment information of the AC bus according to the peak load period; controlling the virtual synchronous motor to discharge according to the first load demand adjustment information; A sixth acquisition module 6 is used to acquire the direction of the AC bus being in a load valley period, and acquire the second load demand adjustment information of the AC bus according to the load valley period direction; The virtual synchronous motor is controlled to charge according to the second load demand adjustment information.

[0035] In one embodiment, the first acquisition module 1 includes: A first acquisition unit, used to acquire the dynamic time resolution of the plurality of AC subnets and the plurality of DC subnets; A second acquisition unit is used to acquire the initial load acquisition time intervals corresponding to the plurality of AC subnets and the plurality of DC subnets according to the dynamic time resolution; A third acquisition unit is used to collect the AC subnet active power and the AC subnet reactive power corresponding to each AC subnet, and the DC subnet active power and the DC subnet reactive power corresponding to each DC subnet based on the initial load acquisition time interval; A fourth acquisition unit is used to acquire the active power and reactive power of all the AC subnets to obtain the total AC subnet active power and the total AC subnet reactive power; A fifth acquisition unit, used to acquire the active power and reactive power of all the DC subnets to obtain the total DC subnet active power and the total DC subnet reactive power; A sixth acquisition unit, configured to acquire the total transmission active power and the total transmission reactive power of the AC bus according to the total AC subnet active power and the total DC subnet active power, the total AC subnet reactive power and the total DC subnet reactive power; A seventh acquisition unit, configured to acquire the total transmitted active power and the total transmitted reactive power of the AC bus at multiple time intervals based on the initial load acquisition time interval; The eighth acquisition unit is used to acquire the total transmission active power and the total transmission reactive power of all the time intervals to obtain real-time load change data.

[0036] The present invention also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above-mentioned virtual synchronous motor energy storage charging and discharging regulation method when executing the computer program.

[0037] The present invention also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the above-mentioned virtual synchronous motor energy storage charging and discharging regulation method are implemented.

[0038] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, value library or other media provided in this application and used in the embodiments 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. By way of 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 (SSRSDRAM), 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), etc.

[0039] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, device, article or method including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, device, article or method. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the presence of other identical elements in the process, device, article or method including the element.

[0040] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent results or equivalent process changes made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the protection scope of this application.

Claims

1. A virtual synchronous motor energy storage charging and discharging regulation method, applied to an AC / DC hybrid microgrid, wherein the AC / DC hybrid microgrid includes an AC bus, and the virtual synchronous motor is connected to the AC bus, characterized in that: include: Acquire multiple real-time load change information of the AC bus, wherein the real-time load change information includes real-time active load information and real-time reactive load information; Based on the state variable principle, a plurality of real-time load change information are coupled and calculated to obtain a plurality of dynamic load change data, and a time change curve is established according to the plurality of dynamic load change data; Acquire a plurality of load data to be regulated according to the time variation curve, wherein the load data to be regulated includes active load variation data to be regulated and reactive load variation data to be regulated; Detecting adjustment direction information of the AC bus according to the load data to be adjusted, wherein the adjustment direction information includes a load peak period direction and a load valley period direction; If the AC bus is in the direction of the load peak period, obtaining first load demand adjustment information of the AC bus according to the direction of the load peak period; controlling the virtual synchronous motor to discharge according to the first load demand adjustment information; If the AC bus is in a load valley period, obtaining second load demand adjustment information of the AC bus according to the load valley period; The virtual synchronous motor is controlled to charge according to the second load demand adjustment information.

2. A virtual synchronous motor energy storage charging and discharging regulation method according to claim 1, characterized in that: The step of obtaining multiple real-time load change information of the AC bus includes: Obtaining dynamic time resolution of a plurality of the AC subnets and a plurality of DC subnets; Acquire the initial load acquisition time intervals corresponding to the plurality of AC subnets and the plurality of DC subnets according to the dynamic time resolution; Based on the initial load acquisition time interval, the AC subnet active power and the AC subnet reactive power corresponding to each AC subnet, and the DC subnet active power and the DC subnet reactive power corresponding to each DC subnet are collected; Obtaining the active power and reactive power of all the AC subnets to obtain the total active power and reactive power of the AC subnets; Obtaining all the DC subnet active power and DC subnet reactive power to obtain the total DC subnet active power and total DC subnet reactive power; Obtaining the total transmission active power and the total transmission reactive power of the AC bus according to the total AC subnet active power and the total DC subnet active power, the total AC subnet reactive power and the total DC subnet reactive power; Acquire the total transmitted active power and the total transmitted reactive power of the AC bus in multiple time intervals based on the initial load acquisition time interval; The total transmitted active power and the total transmitted reactive power in all the time intervals are acquired to obtain real-time load change data.

3. A virtual synchronous motor energy storage charging and discharging regulation method according to claim 1, characterized in that: The step of performing coupling calculation on the multiple real-time load change information based on the state variable principle to obtain multiple dynamic load change data includes: Acquire state variables of the AC bus, wherein the state variables include voltage and frequency; Acquire a load variable timestamp according to the load acquisition time interval, and acquire multiple load variable time points according to the load variable timestamp; Obtaining the real-time active load information at each load variable time point and the active voltage sensitivity value and active frequency sensitivity value corresponding to the voltage and frequency; and obtaining active load change data according to a plurality of load variable time points, active voltage sensitive values ​​and active frequency sensitive values; Obtain the real-time reactive load information at each load variable time point and the reactive voltage sensitivity value and reactive frequency sensitivity value corresponding to the voltage and frequency; and obtaining reactive load change data according to a plurality of load variable time points, reactive voltage sensitive values ​​and reactive frequency sensitive values; The active load change data and the reactive load change data are coupled and calculated according to each load variable time point to obtain a plurality of dynamic load change data.

4. A virtual synchronous motor energy storage charging and discharging regulation method according to claim 3, characterized in that: The step of acquiring a plurality of load data to be adjusted according to the time variation curve comprises: Acquiring active load change data and reactive load change data exceeding a preset interval according to the time change curve; Obtaining load variable time points of active load change data and reactive load change data exceeding a preset interval, and using the load variable time points as time points to be adjusted; Acquire an adjustment start time point and an adjustment end time point according to the plurality of time points to be adjusted; Obtaining corresponding active load change data and reactive load change data according to the adjustment start time point and the adjustment end time point, and using them as the active load change data to be adjusted and the reactive load change data to be adjusted; All the active load change data to be regulated and the reactive load change data to be regulated are acquired to obtain a plurality of load data to be regulated.

5. A virtual synchronous motor energy storage charging and discharging regulation method according to claim 1, characterized in that: The step of detecting the adjustment direction information of the AC bus according to the load data to be adjusted includes: Acquiring an active load change value according to the active load change data to be adjusted; Determining whether the active load change value is greater than a preset load change standard phase interval; If the active load change value is greater than the maximum value of the preset load change standard phase interval, it is determined that the AC bus inputs active power to the virtual synchronous motor, and a charging direction signal of the AC bus to the virtual synchronous motor is generated; If the active load change value is less than the preset load change standard phase interval minimum value, it is determined that the AC bus needs a virtual synchronous motor to input active power, and a discharge direction signal of the virtual synchronous motor to the AC bus is generated; Acquiring a reactive load change value according to the reactive load change data to be adjusted; Determining whether the reactive load change value is greater than a preset load change standard phase interval; If the reactive load change value is greater than the preset load change standard phase interval maximum value, it is determined that the AC bus needs to reduce reactive power output, and a reactive power output reduction signal for the AC bus is generated; If the reactive load change value is less than the preset load change standard phase interval minimum value, it is determined that the AC bus needs to increase reactive power output, and an increase reactive power output signal of the AC bus is generated; The discharge direction signal, the charge direction signal, the reactive power output reduction signal and the reactive power output increase signal are concentrated to obtain the regulation direction information.

6. A virtual synchronous motor energy storage charging and discharging regulation method according to claim 1, characterized in that: The step of obtaining the first load demand adjustment information of the AC bus according to the load peak time period direction includes: Obtaining a load demand value according to the active load change value; Obtain the real-time output active power of the virtual synchronous motor; Obtaining an output power deviation value of the virtual synchronous motor according to the load demand value and the real-time output active power; The first load demand adjustment information is generated by using the discharge direction signal and the charge direction signal as the adjustment direction and the output power deviation value as the adjustment amount.

7. A virtual synchronous motor energy storage charging and discharging regulation system, applied to an AC / DC hybrid microgrid, wherein the AC / DC hybrid microgrid includes an AC bus, and the virtual synchronous motor is connected to the AC bus, characterized in that: include: A first acquisition module is used to acquire multiple real-time load change information of the AC bus, wherein the real-time load change information includes real-time active load information and real-time reactive load information; A second acquisition module is used to perform coupling calculation on the multiple real-time load change information based on the state variable principle to obtain multiple dynamic load change data, and establish a time change curve according to the multiple dynamic load change data; A third acquisition module is used to acquire a plurality of load data to be regulated according to the time variation curve, wherein the load data to be regulated includes active load variation data to be regulated and reactive load variation data to be regulated; A fourth acquisition module, configured to detect adjustment direction information of the AC bus according to the load data to be adjusted, wherein the adjustment direction information includes a direction during a load peak period and a direction during a load valley period; A fifth acquisition module is used to obtain the direction of the AC bus in the peak load period, and obtain the first load demand adjustment information of the AC bus according to the direction of the peak load period; controlling the virtual synchronous motor to discharge according to the first load demand adjustment information; A sixth acquisition module, used to acquire the direction of the AC bus being in a load valley period, and acquire the second load demand adjustment information of the AC bus according to the direction of the load valley period; The virtual synchronous motor is controlled to charge according to the second load demand adjustment information.

8. A virtual synchronous motor energy storage charging and discharging regulation system according to claim 7, characterized in that: The second acquisition module includes: A first acquisition unit, used to acquire the dynamic time resolution of the plurality of AC subnets and the plurality of DC subnets; A second acquisition unit is used to acquire the initial load acquisition time intervals corresponding to the plurality of AC subnets and the plurality of DC subnets according to the dynamic time resolution; A third acquisition unit is used to collect the AC subnet active power and the AC subnet reactive power corresponding to each AC subnet, and the DC subnet active power and the DC subnet reactive power corresponding to each DC subnet based on the initial load acquisition time interval; A fourth acquisition unit is used to acquire the active power and reactive power of all the AC subnets to obtain the total AC subnet active power and the total AC subnet reactive power; A fifth acquisition unit, used to acquire the active power and reactive power of all the DC subnets to obtain the total DC subnet active power and the total DC subnet reactive power; A sixth acquisition unit, configured to acquire the total transmission active power and the total transmission reactive power of the AC bus according to the total AC subnet active power and the total DC subnet active power, the total AC subnet reactive power and the total DC subnet reactive power; A seventh acquisition unit, configured to acquire the total transmitted active power and the total transmitted reactive power of the AC bus at multiple time intervals based on the initial load acquisition time interval; The eighth acquisition unit is used to acquire the total transmission active power and the total transmission reactive power of all the time intervals to obtain real-time load change data.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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