Regional power grid control system based on renewable energy sources

Abstract

The invention discloses a regional power grid control system based on renewable energy sources, and relates to the technical field of electric energy storage systems. Firstly, regional power conversion data of renewable energy sources are collected, processing is carried out in combination with regional power grid transmission data, scheduling and configuration of power grid resources are optimized, the utilization rate of power resources is improved, then transmission configuration is carried out on a regional power grid according to a regional power grid transmission configuration result, and then power transmission is carried out. According to the method, efficient power transmission is realized, the overall efficiency of the power grid is improved, the power transmission process is monitored, regional power transmission information is obtained, abnormity and potential risks in power transmission can be accurately captured, the reliability of regional power grid control is improved, and finally, power grid structure optimization configuration is performed on the regional power grid, so that the power grid structure optimization configuration efficiency is improved. The load capacity of the power grid is improved, and the loss in the power transmission process is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electric energy storage systems, and in particular to a regional power grid control system based on renewable energy. Background Art

[0002] In the field of regional power grid control, as the proportion of renewable energy continues to increase, effective management and optimization of the stability and reliability of the power grid has become an important challenge in the development of the power system. Regional power grid control coordinates the power output of various energies through intelligent scheduling and real-time monitoring to ensure smooth and efficient power supply. It can respond to changes in renewable energy in real time and improve the flexibility of the power grid, thereby achieving a high proportion of renewable energy access, providing more efficient technical support for improving the security and stability of power supply.

[0003] The prior art, such as the invention patent announcement with announcement number: CN111697578B, discloses a multi-objective energy storage regional power grid operation control method, which combines the consumption of renewable energy, the peak regulation effect of the power grid system, and the contribution of the energy storage system to the frequency regulation market to establish a multi-objective energy storage regional power grid operation model. The indicators of different dimensions are normalized with the corresponding benchmark values, and then the impact of different objectives on the operation is comprehensively considered in a weighted manner.

[0004] Prior art, such as a renewable energy power generation cluster control system and method, is disclosed in the invention patent announcement with announcement number: CN108039734B. The application provides a renewable energy power generation active power control system. Each substation of the substation system collects data from each power generation substation according to multiple data interfaces designed by it and sends the collected data to the main station control system through a central switch using a dedicated protocol. On the other hand, it is responsible for receiving active power instructions issued by the main station control system and sending the instructions to each power generation substation monitoring system for power control, thereby clustering the distributed power sources of wind power, photovoltaic power stations, and hydropower stations in a certain area, and then realizing the prediction and control of active power in the power generation area, so that the distributed power sources in a certain area form a whole to participate in the operation and management of the power grid, bringing greater economic benefits to power plants and users, and providing higher quality power services.

[0005] Combined with the above scheme, it is found that currently in the field of power grid control technology, usually only the utilization rate of renewable energy is monitored and analyzed. However, there may be problems in the transmission process of renewable energy, which will affect the stability of the power grid. This will not only affect the optimal utilization of renewable energy and fail to give full play to the role of renewable energy in the power grid, but may also lead to the risk of insufficient or excessive power supply in the operation of the power grid, affecting the stable operation of the power grid and the quality of power. Summary of the invention

[0006] In view of the deficiencies of the prior art, the present invention provides a regional power grid control system based on renewable energy, which can effectively solve the problems involved in the above-mentioned background technology.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a regional power grid control system based on renewable energy, including a power conversion analysis module, which is used to collect regional power conversion data of renewable energy, combine it with regional power grid transmission data for processing, and analyze it to obtain the regional power grid transmission configuration results.

[0008] The power grid transmission configuration module is used to perform transmission configuration on the regional power grid according to the regional power grid controller and the regional power grid transmission configuration result, and then perform power transmission.

[0009] The power transmission process monitoring module is used to monitor the power transmission process and obtain regional power transmission information.

[0010] The grid structure configuration module is used to optimize the grid structure configuration of the regional power grid based on the regional power transmission information.

[0011] Furthermore, the regional power conversion data of renewable energy is collected, and the specific process is: the regional power conversion data of renewable energy includes the average power conversion efficiency of equipment in the renewable energy area, the average intensity of solar radiation, the average wind speed and the average value of grid frequency deviation.

[0012] Based on the regional power conversion data of renewable energy, the regional power conversion energy efficiency value is processed to obtain the regional power conversion energy efficiency value, and the regional power conversion energy efficiency value is used to comprehensively quantify the overall energy efficiency of regional renewable energy power generation.

[0013] Furthermore, the processing is performed in combination with regional power grid transmission data, and the specific process is: the regional power grid transmission data includes the regional power grid average load rate, the regional power grid average power, the regional power grid harmonic content average value and the regional power grid voltage extreme value.

[0014] Based on the regional power grid transmission data processing, the regional power grid transmission fluctuation characteristic value is obtained, and the regional power grid transmission fluctuation characteristic value is used to comprehensively quantify the volatility of the regional power grid.

[0015] Furthermore, the regional power grid transmission configuration results include regional power grid transmission pre-configuration analysis results and regional power conversion fluctuation analysis results, wherein: the regional power grid transmission fluctuation characteristic value is compared with the set regional power grid transmission fluctuation characteristic threshold to obtain the regional power grid transmission pre-configuration analysis results, and the regional power grid transmission pre-configuration analysis results include regional power grid transmission abnormality and regional power grid transmission normality.

[0016] According to the regional power conversion energy efficiency value, the regional power conversion fluctuation analysis result is analyzed and obtained, and the regional power conversion fluctuation analysis result includes abnormal regional power conversion fluctuation and normal regional power conversion.

[0017] Furthermore, the analysis obtains a regional power grid transmission configuration result, and the specific analysis process is: comparing the regional power grid transmission fluctuation characteristic value with the set regional power grid transmission fluctuation characteristic threshold; if the regional power grid transmission fluctuation characteristic value is higher than the set regional power grid transmission fluctuation characteristic threshold, then the regional power grid transmission pre-configuration analysis result is marked as regional power grid transmission abnormality; otherwise, the regional power grid transmission pre-configuration analysis result is marked as regional power grid transmission normal.

[0018] The absolute value of the difference between the regional power conversion energy efficiency value and the set regional power conversion energy efficiency threshold is recorded as the regional power conversion fluctuation control value. If the regional power conversion fluctuation control value is higher than the set regional power conversion fluctuation control threshold, the regional power conversion fluctuation analysis result is marked as abnormal regional power conversion fluctuation; otherwise, the regional power conversion fluctuation analysis result is marked as normal regional power conversion.

[0019] Furthermore, the transmission configuration of the regional power grid is specifically carried out in the following process: extracting the transmission configuration result of the regional power grid, performing regional power grid pre-configuration according to the transmission pre-configuration analysis result of the regional power grid; if the transmission pre-configuration analysis result of the regional power grid is that the regional power grid transmission is abnormal, then the difference between the transmission fluctuation characteristic value of the regional power grid and the set transmission fluctuation characteristic threshold of the regional power grid is recorded as the regional power grid optimization reference value, and the regional power grid optimization parameters are obtained by matching the regional power grid optimization reference value, and then the regional power grid pre-configuration is executed according to the regional power grid optimization parameters; if the transmission pre-configuration analysis result of the regional power grid is that the regional power grid transmission is normal, then the regional power grid pre-configuration continues to be executed with the current regional power grid optimization parameters.

[0020] After the regional power grid pre-configuration, the regional power grid transmission configuration is performed according to the regional power conversion fluctuation analysis results. If the regional power conversion fluctuation analysis results show that the regional power conversion is normal, the regional power grid transmission configuration continues to be performed with the current regional power grid frequency. If the regional power conversion fluctuation analysis results show that the regional power conversion fluctuation is abnormal, the difference between the regional power conversion fluctuation control value and the set regional power conversion fluctuation control threshold is recorded as the regional power grid transmission optimization control value. The regional power grid frequency supplement value is obtained by matching the regional power grid transmission optimization control value, and then the regional power grid transmission configuration is performed.

[0021] Furthermore, the power transmission process is monitored, and the specific process is: the power transmission process is monitored to obtain power transmission parameters, and the power transmission parameters include the average efficiency of equipment power conversion, the number of harmonic distortions of power transmission current, the average temperature of the power transmission line, the impedance of the power transmission line and the number of occurrences of transient overvoltages in power transmission.

[0022] An abnormal power transmission loss evaluation value is obtained based on power transmission parameter processing, and the abnormal power transmission loss evaluation value is used to comprehensively quantify the transmission loss during the power transmission process.

[0023] Furthermore, the specific process of obtaining the regional power transmission information is as follows: the regional power transmission information includes regional power transmission loss anomaly, regional power transmission loss failure and regional power transmission normal.

[0024] The power transmission abnormal loss evaluation value is compared with the set first evaluation threshold of power transmission abnormal loss. If the power transmission abnormal loss evaluation value is lower than or equal to the set first evaluation threshold of power transmission abnormal loss, the regional power transmission information is marked as normal regional power transmission; otherwise, the power transmission abnormal loss evaluation value is compared with the set second evaluation threshold of power transmission abnormal loss. If the power transmission abnormal loss evaluation value is lower than or equal to the set second evaluation threshold of power transmission abnormal loss, the regional power transmission information is marked as regional power transmission loss abnormality; otherwise, the regional power transmission information is marked as regional power transmission loss failure.

[0025] Furthermore, the grid structure optimization configuration of the regional power grid based on the regional power transmission information is specifically carried out as follows: extract the regional power transmission information, if the regional power transmission information is that the regional power transmission loss is abnormal, then the difference between the abnormal power transmission loss assessment value and the set abnormal power transmission loss first assessment threshold is recorded as the load distribution optimization reference value, the load distribution optimization reference value is matched with the load distribution optimization parameters corresponding to each load distribution optimization reference value interval stored in the regional power grid control database, the load distribution optimization parameters corresponding to the interval where the load distribution optimization reference value is located are counted, recorded as the load distribution optimization parameters of the regional power grid, and the load distribution of the regional power grid is adjusted according to the load distribution optimization parameters of the regional power grid.

[0026] If the regional power transmission information indicates that the regional power transmission loss is a fault, the grid structure of the regional power grid is optimized according to the abnormal power transmission loss assessment value. If the regional power transmission information indicates that the regional power transmission is normal, the grid structure of the regional power grid is optimized according to the current load distribution optimization parameters and substation capacity of the regional power grid.

[0027] Furthermore, if the regional power transmission information is a regional power transmission loss fault, the regional power grid is optimized according to the power transmission abnormal loss assessment value. The specific process is: the difference between the power transmission abnormal loss assessment value and the set second assessment threshold of the power transmission abnormal loss is recorded as the power transmission optimization reference value.

[0028] The power transmission optimization reference value is matched with the substation capacity corresponding to each power transmission optimization reference value interval stored in the regional power grid control database, and the substation capacity corresponding to the interval where the power transmission optimization reference value is located is counted and recorded as the substation capacity of the regional power grid. The power grid structure is optimized and configured based on the substation capacity of the regional power grid.

[0029] The present invention has the following beneficial effects: (1) The present invention provides a regional power grid control system based on renewable energy. First, the regional power conversion data is collected and processed in combination with the regional power grid transmission data. The power grid configuration can be optimized in real time to improve the utilization rate of renewable energy. Then, the transmission configuration of the regional power grid can be carried out to ensure the stable transmission of energy. Then, the power transmission process is monitored to timely discover potential problems in the operation of the power grid. Finally, the power grid structure of the regional power grid is optimized to effectively improve the operation efficiency of the power grid.

[0030] (2) The present invention collects regional power conversion data of renewable energy, combines it with regional power grid transmission data for processing, and analyzes the transmission configuration results of the regional power grid. It can accurately analyze and optimize the transmission configuration of the power grid, improve the sustainability of the regional power grid, monitor the conversion and transmission efficiency of renewable energy in real time, optimize energy flow to reduce energy loss, improve the utilization rate of power grid resources, and enhance the regulation capacity of the regional power grid.

[0031] (3) The present invention can reduce the loss and instability in the transmission process by configuring the transmission of the regional power grid and then monitoring the power transmission process, ensuring that energy is efficiently transmitted on demand. Real-time monitoring of the power transmission process provides continuous tracking of the power grid operation status, timely discovers potential problems, and improves the reliability and stability of the power grid. It not only optimizes the configuration of power resources and reduces energy consumption, but also improves the applicability to power grid load changes and emergencies.

[0032] (4) The present invention optimizes the grid structure of the regional power grid based on the regional power transmission information. The system can more reasonably distribute the grid load, reduce transmission losses, and improve the power transmission capacity and response speed, thereby ensuring the reliability and security of power supply. While supporting the grid connection of renewable energy, the optimized grid structure helps to reduce dependence on traditional energy, achieve efficient use of power resources, and enhance the adaptability and intelligence level of the regional power grid.

[0033] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of system module connection of the present invention. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1 As shown, an embodiment of the present invention provides a technical solution: a regional power grid control system based on renewable energy, including a power conversion analysis module, which is used to collect regional power conversion data of renewable energy, combine it with regional power grid transmission data for processing, and analyze it to obtain regional power grid transmission configuration results.

[0037] The power grid transmission configuration module is used to perform transmission configuration on the regional power grid according to the regional power grid controller and the regional power grid transmission configuration result, and then perform power transmission.

[0038] The power transmission process monitoring module is used to monitor the power transmission process and obtain regional power transmission information.

[0039] The grid structure configuration module is used to optimize the grid structure configuration of the regional power grid based on the regional power transmission information.

[0040] Specifically, the regional power conversion data of renewable energy is collected, and the specific process is: the regional power conversion data of renewable energy includes the average power conversion efficiency of equipment in the renewable energy area, the average intensity of solar radiation, the average wind speed and the average value of grid frequency deviation.

[0041] It should be noted that the average power conversion efficiency of equipment in the renewable energy area refers to the efficiency of renewable energy power generation equipment (such as solar photovoltaic panels, wind turbines, etc.) in converting renewable energy (such as sunlight, wind energy) into electrical energy. Automated monitoring equipment can be used to monitor the power conversion efficiency of equipment in the renewable energy area at multiple time points, and then the average value is taken to obtain the average power conversion efficiency of equipment. A solar radiometer can be used to monitor the solar radiation intensity at multiple time points, and then the average value is taken to obtain the average solar radiation intensity. The average wind speed can be obtained by using a wind speed sensor to monitor the wind speed in the renewable energy area at multiple time points, and the average wind speed is obtained by taking the average value. A power quality analyzer can be used to monitor the grid frequency deviation value at multiple time points, and then the average grid frequency deviation value is obtained.

[0042] Based on the regional power conversion data of renewable energy, the regional power conversion energy efficiency value is processed to obtain the regional power conversion energy efficiency value, and the regional power conversion energy efficiency value is used to comprehensively quantify the overall energy efficiency of regional renewable energy power generation.

[0043] In this embodiment, the regional power conversion energy efficiency value can be obtained by the following analysis method, and the specific analysis conditions are as follows: ; In the formula, represents the regional power conversion efficiency value, Indicates the average efficiency of power conversion of equipment in the renewable energy area, Indicates the power conversion evaluation factor corresponding to the set average power conversion efficiency of the unit equipment, represents the average intensity of solar radiation in the renewable energy area, Indicates the power conversion evaluation factor corresponding to the set unit average solar radiation intensity, represents the average wind speed in the renewable energy area, Indicates the set reference wind speed, represents the average value of grid frequency deviation in the renewable energy area, It represents the power conversion evaluation factor corresponding to the set average value of unit grid frequency deviation, and e represents a natural constant.

[0044] It should be added that, in this embodiment, the power conversion evaluation factor corresponding to the preset average power conversion efficiency of unit equipment, the power conversion evaluation factor corresponding to the average intensity of unit solar radiation, and the power conversion evaluation factor corresponding to the average value of unit grid frequency deviation are obtained from the regional power grid control database.

[0045] It needs to be explained that the power conversion evaluation factors corresponding to the average power conversion efficiency per unit of equipment, the average intensity of solar radiation per unit of solar radiation and the average value of grid frequency deviation are respectively used to adjust the importance of the average power conversion efficiency per unit of equipment, the average intensity of solar radiation and the average value of grid frequency deviation in the renewable energy area in the process of analyzing and obtaining the regional power conversion energy efficiency value. For example, there is a pre-set mapping relationship between the real-time regional power conversion data of renewable energy and the corresponding power conversion evaluation factors in the regional power grid control database. The power conversion evaluation factors corresponding to the real-time regional power conversion data of renewable energy can be matched through the pre-set mapping relationship. The average power conversion efficiency per unit of equipment, the average intensity of solar radiation and the average value of grid frequency deviation in the renewable energy area are respectively matched with the pre-set mapping relationship to obtain the power conversion evaluation factors corresponding to the average power conversion efficiency per unit of equipment, the power conversion evaluation factors corresponding to the average intensity of solar radiation and the power conversion evaluation factors corresponding to the average value of grid frequency deviation.

[0046] In this implementation scheme, there is a correlation between the average power conversion efficiency of equipment in the renewable energy area, the average intensity of solar radiation, the average wind speed and the average value of grid frequency deviation, and they do not exist independently. Analyzing any one data alone may not fully reflect the overall effect of regional power conversion. For example, even if the average intensity of solar radiation is large, if the wind speed is unstable or the grid regulation capacity is insufficient, the overall power conversion efficiency and power supply quality may still be affected. High-intensity average solar radiation intensity and moderate wind speed can improve the power conversion efficiency of equipment. When the average value of grid frequency deviation is large, it means an imbalance in power supply and demand, which may lead to grid instability. Comprehensive analysis to obtain the regional power conversion energy efficiency value can more accurately evaluate the actual operating effect of renewable energy power conversion, thereby providing a scientific basis for optimizing grid design and improving grid reliability.

[0047] Specifically, the processing is performed in combination with the regional power grid transmission data, and the specific process is: the regional power grid transmission data includes the regional power grid average load rate, the regional power grid average power, the regional power grid harmonic content average value and the regional power grid voltage extreme value.

[0048] It should be noted that the harmonic content value of the regional power grid refers to the ratio of the harmonic voltage to the fundamental voltage in the power grid. The power load rate of the regional power grid can be monitored by power metering equipment (such as smart meters) within a certain period of time, and then the average power load rate of the regional power grid can be obtained by taking the average value. The average power of the regional power grid can be obtained by using a power analyzer to collect power data within a certain period of time, and then the average power of the regional power grid in that period can be obtained by taking the average value. The harmonic content of the regional power grid can be collected by a harmonic analyzer within a certain period of time, and then the average value can be obtained by taking the average harmonic content of the regional power grid. The extreme value of the regional power grid voltage can be obtained by using power quality monitoring equipment to measure the regional power grid voltage within a certain period of time and then taking the extreme value.

[0049] Based on the regional power grid transmission data processing, the regional power grid transmission fluctuation characteristic value is obtained, and the regional power grid transmission fluctuation characteristic value is used to comprehensively quantify the volatility of the regional power grid.

[0050] In this embodiment, the transmission fluctuation characteristic value of the regional power grid can be obtained by the following analysis method, and the specific analysis conditions are as follows: ; In the formula, represents the transmission fluctuation characteristic value of the regional power grid, represents the average load rate of regional power grid, Indicates the average load rate of the power grid in the reference area. represents the average power of the regional power grid, Indicates the set reference area power grid, Indicates the average value of harmonic content in the regional power grid, It indicates the transmission fluctuation compensation factor corresponding to the average value of harmonic content in the set unit area power grid. Indicates the extreme value of regional power grid voltage, It represents the set voltage extreme value of the reference area power grid, and e represents a natural constant.

[0051] It should be added that, in this embodiment, the transmission fluctuation compensation factor corresponding to the preset average value of harmonic content of the unit regional power grid is obtained from the regional power grid control database.

[0052] It needs to be explained that the transmission fluctuation compensation factor corresponding to the average value of the harmonic content of the unit regional power grid is used to adjust the importance of the average value of the harmonic content of the regional power grid in the process of analyzing and obtaining the transmission fluctuation characteristic value of the regional power grid. For example, there is a pre-set mapping relationship between the real-time regional power grid transmission data and the corresponding transmission fluctuation compensation factor in the regional power grid control database. The transmission fluctuation compensation factor corresponding to the real-time regional power grid transmission data can be matched through the pre-set mapping relationship. The average value of the harmonic content of the regional power grid is matched with the pre-set mapping relationship to obtain the transmission fluctuation compensation factor corresponding to the average value of the harmonic content of the unit regional power grid.

[0053] In this implementation scheme, there is a correlation between the average load rate of regional power grid electricity, the average power of regional power grid, the average harmonic content of regional power grid and the extreme voltage of regional power grid, and they do not exist independently. For example, the average load rate of regional power grid electricity and the average power of regional power grid are closely related. An increase in the average load rate of regional power grid electricity usually means an increase in the average power demand of the regional power grid, which may cause fluctuations in the extreme voltage of the regional power grid and changes in the average harmonic content of the regional power grid. The extreme voltage of the regional power grid is directly affected by the changes in the average load rate of regional power grid electricity and the fluctuations in the average harmonic content of the regional power grid. Too high or too low extreme voltage of the regional power grid may cause equipment failure or grid instability. The average harmonic content of the regional power grid is an indicator of grid quality, which usually increases when the average load rate of regional power grid electricity is high, thereby affecting the power factor and transmission efficiency of the grid. Comprehensive analysis of the transmission fluctuation characteristic value of the regional power grid can more accurately evaluate the operation status of the grid, thereby providing a scientific basis for optimizing the scheduling of the grid and improving the power quality, and improving the stability and efficiency of the grid.

[0054] Specifically, the regional power grid transmission configuration results include regional power grid transmission pre-configuration analysis results and regional power conversion fluctuation analysis results, wherein: the regional power grid transmission fluctuation characteristic value is compared with the set regional power grid transmission fluctuation characteristic threshold to obtain the regional power grid transmission pre-configuration analysis result, and the regional power grid transmission pre-configuration analysis result includes regional power grid transmission abnormality and regional power grid transmission normality.

[0055] According to the regional power conversion energy efficiency value, the regional power conversion fluctuation analysis result is analyzed and obtained, and the regional power conversion fluctuation analysis result includes abnormal regional power conversion fluctuation and normal regional power conversion.

[0056] Specifically, the regional power grid transmission configuration result is analyzed, and the specific analysis process is: compare the regional power grid transmission fluctuation characteristic value with the set regional power grid transmission fluctuation characteristic threshold; if the regional power grid transmission fluctuation characteristic value is higher than the set regional power grid transmission fluctuation characteristic threshold, then the regional power grid transmission pre-configuration analysis result is marked as regional power grid transmission abnormality; otherwise, the regional power grid transmission pre-configuration analysis result is marked as regional power grid transmission normal.

[0057] The absolute value of the difference between the regional power conversion energy efficiency value and the set regional power conversion energy efficiency threshold is recorded as the regional power conversion fluctuation control value. If the regional power conversion fluctuation control value is higher than the set regional power conversion fluctuation control threshold, the regional power conversion fluctuation analysis result is marked as abnormal regional power conversion fluctuation; otherwise, the regional power conversion fluctuation analysis result is marked as normal regional power conversion.

[0058] Specifically, the regional power grid is configured for transmission, and the specific process is: extract the regional power grid transmission configuration result, perform regional power grid preconfiguration according to the regional power grid transmission preconfiguration analysis result, if the regional power grid transmission preconfiguration analysis result is that the regional power grid transmission is abnormal, then the difference between the regional power grid transmission fluctuation characteristic value and the set regional power grid transmission fluctuation characteristic threshold is recorded as the regional power grid optimization reference value, and the regional power grid optimization parameters are obtained by matching the regional power grid optimization reference value, and then the regional power grid preconfiguration is executed according to the regional power grid optimization parameters. If the regional power grid transmission preconfiguration analysis result is that the regional power grid transmission is normal, then the regional power grid preconfiguration continues to be executed with the current regional power grid optimization parameters.

[0059] It should be supplemented that the regional power grid optimization reference value is matched with the regional power grid optimization parameters corresponding to each regional power grid optimization reference value interval stored in the regional power grid control database, and the regional power grid optimization parameters corresponding to the interval in which the regional power grid optimization reference value is located are counted and recorded as regional power grid optimization parameters, where the regional power grid optimization parameters include the regional power grid reserve capacity and the cutoff frequency of the harmonic filter.

[0060] It should be noted that the analysis of regional power grid transmission data can reflect the stability of regional power grid transmission. If the regional power grid transmission is unstable and power is transmitted with the original default regional power grid reserve capacity and harmonic filter cutoff frequency, the power grid may be unable to meet the load demand, causing power supply interruption in some areas. Therefore, it is necessary to adjust the regional power grid reserve capacity and the cutoff frequency of the harmonic filter according to the regional power grid transmission data. The larger the regional power grid optimization reference value, the more serious the power grid transmission fluctuation, which means that a larger reserve capacity is needed to ensure the stable operation of the power grid. At the same time, the cutoff frequency of the harmonic filter needs to be lowered to more effectively filter out harmonics. Therefore, the larger the regional power grid optimization reference value, the larger the matched regional power grid reserve capacity and the smaller the cutoff frequency of the harmonic filter.

[0061] After the regional power grid pre-configuration, the regional power grid transmission configuration is performed according to the regional power conversion fluctuation analysis results. If the regional power conversion fluctuation analysis results show that the regional power conversion is normal, the regional power grid transmission configuration continues to be performed with the current regional power grid frequency. If the regional power conversion fluctuation analysis results show that the regional power conversion fluctuation is abnormal, the difference between the regional power conversion fluctuation control value and the set regional power conversion fluctuation control threshold is recorded as the regional power grid transmission optimization control value. The regional power grid frequency supplement value is obtained by matching the regional power grid transmission optimization control value, and then the regional power grid transmission configuration is performed.

[0062] It should be supplemented that the regional power grid transmission optimization control value is matched with the regional power grid frequency supplement value corresponding to each regional power grid transmission optimization control value interval stored in the regional power grid control database, and the regional power grid frequency supplement value corresponding to the interval in which the regional power grid transmission optimization control value is located is counted and recorded as the regional power grid frequency supplement value. The current regional power grid frequency is added to the regional power grid frequency supplement value, which is recorded as the regional power grid frequency adjustment value, and the regional power grid transmission configuration is performed according to the regional power grid frequency adjustment value.

[0063] It should be noted that the analysis of regional power conversion data of renewable energy can reflect the efficiency of power conversion of renewable energy. If the efficiency of power conversion of renewable energy fluctuates greatly and the subsequent power transmission is carried out at the original default regional power grid frequency, the system will be unable to adapt to the volatility of renewable energy, resulting in instability in the subsequent power transmission process. Therefore, it is necessary to adjust the regional power grid frequency according to the regional power conversion data of renewable energy. The larger the regional power grid transmission optimization control value, the more unstable the power conversion of renewable energy, which means that the power grid frequency needs to be adjusted to adapt to power conversion fluctuations. Therefore, the larger the regional power grid transmission optimization control value, the larger the regional power grid frequency supplement value obtained by matching.

[0064] Specifically, the power transmission process is monitored, and the specific process is: the power transmission process is monitored to obtain power transmission parameters, wherein the power transmission parameters include the average efficiency of equipment power conversion, the number of harmonic distortions of power transmission current, the average temperature of the power transmission line, the impedance of the power transmission line and the number of occurrences of transient overvoltages in power transmission.

[0065] It should be noted that the number of harmonic distortions of power transmission current refers to the number of harmonic distortions that exceed a specific threshold in the power transmission system within a certain period of time. Transient overvoltage refers to a voltage spike that occurs in a short period of time (usually caused by lightning strikes, switching operations or faults). The number of occurrences of transient overvoltages in power transmission reflects the frequency of transient overvoltages in the power transmission system. Automated monitoring equipment can be used to monitor the power conversion efficiency of equipment in renewable energy areas at multiple time points, and then the average power conversion efficiency of the equipment can be obtained. A harmonic analyzer can be used to measure the number of harmonic distortions that exceed a specific threshold in the power transmission system within a certain period of time, and then the number of harmonic distortions of power transmission current can be obtained. The average temperature of the power transmission line can be obtained by using a temperature sensor to collect the temperature of the power transmission line within a certain period of time and taking the average value. An impedance analyzer can be used to measure the impedance of the power transmission line. An overvoltage detection device can be used to measure the number of transient overvoltages that occur within a certain period of time to obtain the number of occurrences of transient overvoltages in power transmission.

[0066] It should be added that the average power conversion efficiency of the equipment was used in the process of analyzing and obtaining the regional power conversion energy efficiency value and the power transmission abnormal loss assessment value. The regional power conversion energy efficiency value obtained by analyzing the average power conversion efficiency of the equipment can provide a data basis for the subsequent power transmission configuration. The accuracy of the analysis of the abnormal power transmission loss assessment value can be improved by analyzing the average power conversion efficiency of the equipment, thereby improving the stability and transmission efficiency of the regional power grid.

[0067] An abnormal power transmission loss evaluation value is obtained based on power transmission parameter processing, and the abnormal power transmission loss evaluation value is used to comprehensively quantify the transmission loss during the power transmission process.

[0068] In this embodiment, the abnormal power transmission loss evaluation value can be obtained by the following analysis method, and the specific analysis conditions are as follows: ; In the formula, Indicates the abnormal power transmission loss assessment value, Indicates the average efficiency of power conversion of the equipment, It represents the transmission anomaly assessment factor corresponding to the set average efficiency of unit equipment power conversion. Indicates the harmonic distortion of power transmission current. Indicates the transmission anomaly assessment factor corresponding to the set unit power transmission current harmonic distortion order, represents the average temperature of the power transmission line, Indicates the set reference power transmission line temperature, represents the power transmission line impedance, It represents the transmission anomaly assessment factor corresponding to the set unit power transmission line impedance. Indicates the number of times transient overvoltage occurs in power transmission. It represents the transmission anomaly assessment factor corresponding to the set number of occurrences of unit power transmission transient overvoltage, and e represents a natural constant.

[0069] It should be added that, in the present embodiment, the transmission abnormality assessment factor corresponding to the preset average efficiency of power conversion per unit equipment, the transmission abnormality assessment factor corresponding to the number of harmonic distortions per unit power transmission current, the transmission abnormality assessment factor corresponding to the impedance of the unit power transmission line, and the transmission abnormality assessment factor corresponding to the number of occurrences of transient overvoltage per unit power transmission are obtained from the regional power grid control database.

[0070] It needs to be explained that the transmission abnormality assessment factors corresponding to the average efficiency of power conversion per unit equipment, the number of harmonic distortions per unit power transmission current, the unit power transmission line impedance and the number of transient overvoltages per unit power transmission are respectively used to adjust the importance of the average efficiency of power conversion per unit equipment, the number of harmonic distortions per unit power transmission current, the power transmission line impedance and the number of transient overvoltages per unit power transmission in the process of analyzing and obtaining the evaluation value of abnormal power transmission loss. For example, there is a pre-set mapping relationship between the real-time power transmission parameters and the corresponding transmission abnormality assessment factors in the regional power grid control database. The transmission abnormality assessment factors corresponding to the real-time power transmission parameters can be matched through the pre-set mapping relationship. The average efficiency of power conversion per unit equipment, the number of harmonic distortions per unit power transmission current, the power transmission line impedance and the number of transient overvoltages per unit power transmission are respectively matched with the pre-set mapping relationship to obtain the transmission abnormality assessment factors corresponding to the average efficiency of power conversion per unit equipment, the number of harmonic distortions per unit power transmission current, the unit power transmission line impedance and the number of transient overvoltages per unit power transmission.

[0071] In this implementation scheme, the power transmission parameters include the average efficiency of equipment power conversion, the number of harmonic distortions of power transmission current, the average temperature of the power transmission line, the impedance of the power transmission line and the number of transient overvoltages in power transmission. There is a correlation between them and they do not exist independently. For example, the average temperature of the power transmission line and the impedance of the power transmission line work together. An increase in the average temperature of the power transmission line usually leads to an increase in the impedance of the power transmission line, thereby increasing the loss of power transmission. Especially under long-term high-load operation, the impedance of the power transmission line changes more significantly. The number of transient overvoltages in power transmission is a manifestation of instability in the power grid system. Frequent overvoltages may cause equipment damage or energy waste. Comprehensive analysis to obtain the abnormal loss assessment value of power transmission can more accurately assess abnormal losses in power transmission, identify potential abnormal problems, and improve the overall stability of power transmission.

[0072] Specifically, the regional power transmission information is obtained, and the specific process is: the regional power transmission information includes regional power transmission loss abnormality, regional power transmission loss failure and regional power transmission normal.

[0073] The power transmission abnormal loss evaluation value is compared with the set first evaluation threshold of power transmission abnormal loss. If the power transmission abnormal loss evaluation value is lower than or equal to the set first evaluation threshold of power transmission abnormal loss, the regional power transmission information is marked as normal regional power transmission; otherwise, the power transmission abnormal loss evaluation value is compared with the set second evaluation threshold of power transmission abnormal loss. If the power transmission abnormal loss evaluation value is lower than or equal to the set second evaluation threshold of power transmission abnormal loss, the regional power transmission information is marked as regional power transmission loss abnormality; otherwise, the regional power transmission information is marked as regional power transmission loss failure.

[0074] Specifically, the grid structure of the regional power grid is optimized and configured based on the regional power transmission information. The specific process is: extract the regional power transmission information. If the regional power transmission information is that the regional power transmission loss is abnormal, the difference between the abnormal power transmission loss assessment value and the set first assessment threshold of the abnormal power transmission loss is recorded as the load distribution optimization reference value. The load distribution optimization reference value is matched with the load distribution optimization parameters corresponding to each load distribution optimization reference value interval stored in the regional power grid control database. The load distribution optimization parameters corresponding to the interval where the load distribution optimization reference value is located are counted and recorded as the load distribution optimization parameters of the regional power grid. The load distribution of the regional power grid is adjusted according to the load distribution optimization parameters of the regional power grid.

[0075] It should be added that the load distribution optimization parameters of the regional power grid include the inductance and capacitance of the regional power grid. The analysis of power transmission parameters can reflect the stability of the power transmission process. If the power transmission loss is large and the power transmission continues with the original default load distribution optimization parameters of the regional power grid, the overall operation efficiency of the power grid will decrease, resulting in more energy waste. Therefore, it is necessary to adjust the load distribution optimization parameters of the regional power grid according to the power transmission parameters. The larger the abnormal power transmission loss assessment value, the more abnormal the power transmission is. More inductance may be required to suppress the rapid change of current, thereby reducing losses. At the same time, it means that the reactive power demand of the power grid is higher, and more capacitors are required to provide reactive support to reduce losses and improve voltage quality. Therefore, the larger the regional power grid transmission optimization comparison value, the larger the inductance and capacitance of the matched regional power grid, and the inductance and capacitance of the regional power grid are changed by switching reactors.

[0076] If the regional power transmission information indicates that the regional power transmission loss is a fault, the grid structure of the regional power grid is optimized according to the abnormal power transmission loss assessment value. If the regional power transmission information indicates that the regional power transmission is normal, the grid structure of the regional power grid is optimized according to the current load distribution optimization parameters and substation capacity of the regional power grid.

[0077] Specifically, if the regional power transmission information is a regional power transmission loss fault, the regional power grid is optimized according to the power transmission abnormal loss assessment value. The specific process is: the difference between the power transmission abnormal loss assessment value and the set second assessment threshold of the power transmission abnormal loss is recorded as the power transmission optimization reference value.

[0078] The power transmission optimization reference value is matched with the substation capacity corresponding to each power transmission optimization reference value interval stored in the regional power grid control database, and the substation capacity corresponding to the interval where the power transmission optimization reference value is located is counted and recorded as the substation capacity of the regional power grid. The power grid structure is optimized and configured based on the substation capacity of the regional power grid.

[0079] It should be added that the analysis of power transmission parameters can reflect the stability of the power transmission process. If the power transmission loss is large and the power transmission continues with the original default substation capacity of the regional power grid, it will lead to low transmission efficiency, excessive losses, grid overload and other problems, thereby affecting the safety and stability of the grid. Therefore, it is necessary to adjust the substation capacity of the regional power grid according to the power transmission parameters. The larger the power transmission optimization reference value, the more serious the abnormal loss in the power transmission process, and more substation capacity may be needed to alleviate the pressure in the power grid transmission process. Therefore, the larger the power transmission optimization reference value, the larger the substation capacity of the matched regional power grid.

[0080] It should be noted that a regional power grid control system based on renewable energy also includes a regional power grid control database for storing a first parameter set, a second parameter set, a third parameter set and a fourth parameter set obtained by analyzing historical data.

[0081] The first parameter set includes the power conversion evaluation factor corresponding to the average power conversion efficiency of unit equipment, the power conversion evaluation factor corresponding to the average intensity of unit solar radiation, the reference wind speed, the power conversion evaluation factor corresponding to the average value of unit grid frequency deviation, the reference regional grid power average load rate, the reference regional grid power, the transmission fluctuation compensation factor corresponding to the average value of unit regional grid harmonic content and the reference regional grid voltage extreme value.

[0082] The second parameter set includes the regional power grid transmission fluctuation characteristic threshold, the regional power conversion energy efficiency threshold, the regional power conversion fluctuation control threshold, the regional power grid optimization parameters corresponding to each regional power grid optimization reference value interval, and the regional power grid frequency supplement value corresponding to each regional power grid transmission optimization control value interval.

[0083] The third parameter set includes the transmission abnormality assessment factor corresponding to the average efficiency of power conversion per unit equipment, the transmission abnormality assessment factor corresponding to the number of harmonic distortions of unit power transmission current, the reference power transmission line temperature, the transmission abnormality assessment factor corresponding to the unit power transmission line impedance, the transmission abnormality assessment factor corresponding to the number of occurrences of transient overvoltage per unit power transmission, the first assessment threshold of abnormal power transmission loss, and the second assessment threshold of abnormal power transmission loss.

[0084] The fourth parameter set includes load distribution optimization parameters corresponding to each load distribution optimization comparison value interval and substation capacity corresponding to each power transmission optimization reference value interval.

[0085] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0086] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well.

Claims

1. A regional power grid control system based on renewable energy, characterized in that: include: The power conversion analysis module is used to collect regional power conversion data of renewable energy, process it in combination with regional power grid transmission data, and analyze it to obtain the regional power grid transmission configuration results; A power grid transmission configuration module, used to perform transmission configuration on the regional power grid according to the regional power grid controller and the regional power grid transmission configuration result, and then perform power transmission; The power transmission process monitoring module is used to monitor the power transmission process and obtain regional power transmission information; The grid structure configuration module is used to optimize the grid structure configuration of the regional power grid based on the regional power transmission information.

2. A regional power grid control system based on renewable energy according to claim 1, characterized in that: The specific process of collecting regional power conversion data of renewable energy is as follows: The regional power conversion data of renewable energy includes the average power conversion efficiency of equipment in the renewable energy region, the average intensity of solar radiation, the average wind speed and the average value of grid frequency deviation; Based on the regional power conversion data of renewable energy, the regional power conversion energy efficiency value is processed to obtain the regional power conversion energy efficiency value, and the regional power conversion energy efficiency value is used to comprehensively quantify the overall energy efficiency of regional renewable energy power generation.

3. A regional power grid control system based on renewable energy according to claim 1, characterized in that: The specific process of processing the data transmitted by the regional power grid is as follows: The regional power grid transmission data includes the regional power grid average load rate, the regional power grid average power, the regional power grid harmonic content average value and the regional power grid voltage extreme value; Based on the regional power grid transmission data processing, the regional power grid transmission fluctuation characteristic value is obtained, and the regional power grid transmission fluctuation characteristic value is used to comprehensively quantify the volatility of the regional power grid.

4. A regional power grid control system based on renewable energy according to claim 1, characterized in that: The regional power grid transmission configuration result includes the regional power grid transmission pre-configuration analysis result and the regional power conversion fluctuation analysis result, wherein: Comparing the regional power grid transmission fluctuation characteristic value with the set regional power grid transmission fluctuation characteristic threshold value to obtain the regional power grid transmission pre-configuration analysis result, wherein the regional power grid transmission pre-configuration analysis result includes regional power grid transmission abnormality and regional power grid transmission normality; According to the regional power conversion energy efficiency value, the regional power conversion fluctuation analysis result is analyzed and obtained, and the regional power conversion fluctuation analysis result includes abnormal regional power conversion fluctuation and normal regional power conversion.

5. A regional power grid control system based on renewable energy according to claim 1, characterized in that: The analysis results in the regional power grid transmission configuration, and the specific analysis process is as follows: The regional power grid transmission fluctuation characteristic value is compared with the set regional power grid transmission fluctuation characteristic threshold. If the regional power grid transmission fluctuation characteristic value is higher than the set regional power grid transmission fluctuation characteristic threshold, the regional power grid transmission pre-configuration analysis result is marked as regional power grid transmission abnormality; otherwise, the regional power grid transmission pre-configuration analysis result is marked as regional power grid transmission normal; The absolute value of the difference between the regional power conversion energy efficiency value and the set regional power conversion energy efficiency threshold is recorded as the regional power conversion fluctuation control value. If the regional power conversion fluctuation control value is higher than the set regional power conversion fluctuation control threshold, the regional power conversion fluctuation analysis result is marked as abnormal regional power conversion fluctuation; otherwise, the regional power conversion fluctuation analysis result is marked as normal regional power conversion.

6. A regional power grid control system based on renewable energy according to claim 5, characterized in that: The specific process of performing transmission configuration on the regional power grid is as follows: Extract the regional power grid transmission configuration result, perform regional power grid preconfiguration according to the regional power grid transmission preconfiguration analysis result, if the regional power grid transmission preconfiguration analysis result is that the regional power grid transmission is abnormal, then the difference between the regional power grid transmission fluctuation characteristic value and the set regional power grid transmission fluctuation characteristic threshold is recorded as the regional power grid optimization reference value, and the regional power grid optimization parameters are obtained according to the regional power grid optimization reference value matching, and then the regional power grid preconfiguration is performed according to the regional power grid optimization parameters. If the regional power grid transmission preconfiguration analysis result is that the regional power grid transmission is normal, then continue to perform the regional power grid preconfiguration with the current regional power grid optimization parameters; After the regional power grid pre-configuration, the regional power grid transmission configuration is performed according to the regional power conversion fluctuation analysis results. If the regional power conversion fluctuation analysis results show that the regional power conversion is normal, the regional power grid transmission configuration continues to be performed with the current regional power grid frequency. If the regional power conversion fluctuation analysis results show that the regional power conversion fluctuation is abnormal, the difference between the regional power conversion fluctuation control value and the set regional power conversion fluctuation control threshold is recorded as the regional power grid transmission optimization control value. The regional power grid frequency supplement value is obtained by matching the regional power grid transmission optimization control value, and then the regional power grid transmission configuration is performed.

7. A regional power grid control system based on renewable energy according to claim 1, characterized in that: The power transmission process is monitored, and the specific process is as follows: The power transmission process is monitored to obtain power transmission parameters, wherein the power transmission parameters include average power conversion efficiency of the equipment, number of harmonic distortions of the power transmission current, average temperature of the power transmission line, impedance of the power transmission line, and number of occurrences of transient overvoltages in power transmission; An abnormal power transmission loss evaluation value is obtained based on power transmission parameter processing, and the abnormal power transmission loss evaluation value is used to comprehensively quantify the transmission loss during the power transmission process.

8. A regional power grid control system based on renewable energy according to claim 7, characterized in that: The specific process of obtaining the regional power transmission information is as follows: The regional power transmission information includes regional power transmission loss abnormality, regional power transmission loss failure and regional power transmission normal; The power transmission abnormal loss evaluation value is compared with the set first evaluation threshold of power transmission abnormal loss. If the power transmission abnormal loss evaluation value is lower than or equal to the set first evaluation threshold of power transmission abnormal loss, the regional power transmission information is marked as normal regional power transmission; otherwise, the power transmission abnormal loss evaluation value is compared with the set second evaluation threshold of power transmission abnormal loss. If the power transmission abnormal loss evaluation value is lower than or equal to the set second evaluation threshold of power transmission abnormal loss, the regional power transmission information is marked as regional power transmission loss abnormality; otherwise, the regional power transmission information is marked as regional power transmission loss failure.

9. A regional power grid control system based on renewable energy according to claim 8, characterized in that: The specific process of optimizing the grid structure of the regional power grid based on the regional power transmission information is as follows: Extracting regional power transmission information, if the regional power transmission information is regional power transmission loss abnormality, then the difference between the power transmission abnormal loss assessment value and the set power transmission abnormal loss first assessment threshold is recorded as the load distribution optimization reference value, the load distribution optimization reference value is matched with the load distribution optimization parameters corresponding to each load distribution optimization reference value interval stored in the regional power grid control database, the load distribution optimization parameters corresponding to the load distribution optimization reference value interval are counted, recorded as the load distribution optimization parameters of the regional power grid, and the load distribution of the regional power grid is adjusted according to the load distribution optimization parameters of the regional power grid; If the regional power transmission information indicates that the regional power transmission loss is a fault, the grid structure of the regional power grid is optimized according to the abnormal power transmission loss assessment value. If the regional power transmission information indicates that the regional power transmission is normal, the grid structure of the regional power grid is optimized according to the current load distribution optimization parameters and substation capacity of the regional power grid.

10. A regional power grid control system based on renewable energy according to claim 9, characterized in that: If the regional power transmission information is a regional power transmission loss fault, the regional power grid is optimized and configured according to the power transmission abnormal loss evaluation value. The specific process is as follows: The difference between the power transmission abnormal loss evaluation value and the set power transmission abnormal loss second evaluation threshold is recorded as the power transmission optimization reference value; The power transmission optimization reference value is matched with the substation capacity corresponding to each power transmission optimization reference value interval stored in the regional power grid control database, and the substation capacity corresponding to the interval where the power transmission optimization reference value is located is counted and recorded as the substation capacity of the regional power grid. The power grid structure is optimized and configured based on the substation capacity of the regional power grid.

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