Power quality compensation control method

Abstract

The invention relates to the technical field of electric energy quality compensation, in particular to an electric energy quality compensation control method, which realizes accurate compensation of electric energy quality problems such as harmonic waves, reactive power and unbalanced current by monitoring electric energy quality parameters in a power grid in real time and applying advanced control algorithms and compensation strategies, thereby improving the electric energy quality of the power grid.

Description

Technical Field

[0001] The present invention relates to the technical field of power quality compensation, and in particular to a power quality compensation control method. Background Art

[0002] With the rapid development and widespread application of power electronics technology, power quality problems such as harmonics, reactive power and unbalanced current in power grids have become increasingly prominent. These problems not only affect the stable operation of the power grid, but may also cause damage to electrical equipment and reduce energy efficiency. Therefore, developing an efficient and reliable power quality compensation control method is of great significance to ensure the safe operation of the power grid and improve energy efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a power quality compensation control method to solve the problems raised in the background technology and facilitate promotion.

[0004] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0005] A power quality compensation control method mainly comprises the following steps:

[0006] Step 1: Real-time monitoring of grid parameters. Through sensors installed in the grid, real-time monitoring of voltage and current parameters, as well as harmonics, reactive power and unbalanced current power quality indicators in the grid is carried out;

[0007] Step 2: Data analysis and processing: input the real-time monitored grid parameters into the control system, use the control algorithm to process and analyze the data, and obtain the harmonic current, reactive current and unbalanced current that need to be compensated;

[0008] Step 3: Generate compensation instructions. According to the data analysis results, the control system generates compensation instructions and sends them to the power quality compensation device;

[0009] Step 4: Execute the compensation operation. After receiving the compensation instruction, the power quality compensation device injects the compensation current into the power grid through the internal power electronic converter or inverter to achieve accurate compensation for harmonics, reactive power and unbalanced current power quality problems.

[0010] Step 5: Feedback adjustment and optimization. During the compensation process, the control system continuously monitors the changes in grid parameters and adjusts and optimizes the compensation instructions according to actual conditions to ensure the stability and accuracy of the compensation effect.

[0011] Furthermore, the real-time monitoring of power grid parameters includes the following steps:

[0012] Step 1: Deploy monitoring equipment, which includes selecting monitoring points and installing sensors. Power quality monitoring equipment is deployed at key locations of the power grid, including substations, the starting and ending points of transmission lines, and near important loads. High-precision voltage sensors and current sensors are installed on the monitoring equipment to collect voltage and current signals in the power grid.

[0013] Step 2: Data collection and preprocessing, which includes real-time data collection and data preprocessing. The real-time data collection collects voltage and current waveform data in the power grid through sensors in real time and converts them into digital signals for storage and transmission. The data preprocessing performs filtering and denoising operations on the collected data to improve the accuracy and reliability of the data.

[0014] Step 3: Calculate power quality parameters, wherein the calculated power quality parameters include Fourier transform and calculation parameters, wherein the Fourier transform performs Fourier transform on the pre-processed voltage and current signals to obtain spectrum information, and the calculation parameters calculate the power quality parameters of the three-phase imbalance, reactive power and harmonic content of the power grid according to the spectrum information;

[0015] Step 4: Data transmission and storage, wherein the data transmission transmits the calculated power quality parameters to the control center or data analysis system by wired or wireless means, and the data storage stores the transmitted data in a database or data warehouse for subsequent data analysis and processing;

[0016] Step 5: Real-time monitoring and alarm. The control center or data analysis system monitors the power quality parameters in the power grid in real time, and performs dynamic analysis and evaluation on them. When the power quality parameters exceed the preset threshold, the system issues an alarm or early warning signal to remind the operation and maintenance personnel to take timely measures to deal with it.

[0017] Furthermore, the data analysis and processing includes the following steps:

[0018] Step 1: Data reception and verification: Receive real-time grid parameter data from monitoring equipment or data acquisition systems, including voltage, current and power factor, verify the received data to ensure the integrity, accuracy and timeliness of the data, check whether there are abnormal values ​​or missing values ​​in the data, and perform corresponding processing, including data interpolation or elimination of abnormal data;

[0019] Step 2: Calculation of power quality parameters, including harmonic analysis, reactive power calculation and three-phase imbalance calculation. The harmonic analysis uses Fourier transform to perform spectrum analysis on voltage and current signals to calculate the amplitude and phase of each harmonic. The reactive power calculation calculates the reactive power in the power grid based on the phase difference between voltage and current. The three-phase imbalance calculation calculates the three-phase imbalance index by comparing the imbalance degree of three-phase voltage or current.

[0020] Step 3: Data analysis and evaluation, including trend analysis, statistical analysis and comprehensive evaluation. The trend analysis performs time series analysis on power quality parameters to identify the changing trend and periodicity of the parameters. The statistical analysis uses statistical methods to perform statistical analysis on power quality parameters, including calculating the mean, standard deviation, maximum value and minimum value. The comprehensive evaluation performs a comprehensive evaluation on the power quality of the power grid based on the calculation results of the power quality parameters and determines the severity of the problem.

[0021] Step 4: Data visualization and report generation. Use charts and curve visualization methods to display the changing trends and distribution of power quality parameters, so that operation and maintenance personnel can intuitively understand the power quality status of the power grid. Based on the data analysis results, generate a power quality monitoring report, including monitoring time, monitoring points, calculation results of power quality parameters, evaluation conclusions and recommended measures.

[0022] Further, the generating of the compensation instruction comprises the following steps:

[0023] Step 1: Determine the compensation target. According to the results of data analysis and processing, determine the power quality problems existing in the power grid. According to the severity of the power quality problems and the actual needs of the power grid, set the compensation target, that is, the power quality index that needs to be achieved;

[0024] Step 2: Calculate the compensation amount. According to the compensation target and grid parameters, select the appropriate compensation algorithm, including instantaneous reactive power theory and Fourier transform. Use the compensation algorithm to calculate the current value to be compensated based on the real-time monitored grid parameters and the set compensation target. Determine the compensation strategy based on the calculated compensation current value.

[0025] Step 3: Generate compensation instructions. According to the calculated compensation current value and the determined compensation strategy, write compensation instructions, verify the generated compensation instructions to ensure their accuracy, rationality and feasibility, and send the verified compensation instructions to the power quality compensation device to perform compensation operations;

[0026] Step 4: Monitoring and adjustment. During the compensation process, monitor the grid parameters and the working status of the compensation device in real time to ensure that the compensation effect meets expectations. According to the real-time monitoring results, if the compensation effect is not ideal or the grid parameters change, adjust the compensation instructions in time to ensure the accuracy and stability of the compensation.

[0027] Further, the performing of the compensation operation comprises the following steps:

[0028] Step 1: receiving compensation instructions. The power quality compensation device receives compensation instructions from the control system through its built-in communication interface, analyzes the received compensation instructions, and extracts the magnitude, phase and frequency information of the compensation current;

[0029] Step 2: Adjust the parameters of the compensation device. According to the compensation instruction information obtained by analysis, adjust the internal parameters of the compensation device, including the duty cycle and frequency of the PWM signal, to generate the required compensation current. After adjusting the parameters, check the device to ensure that the parameter settings are correct and the compensation device can work stably.

[0030] Step 3: Generate compensation current. After confirming that the parameter settings are correct, start the compensation device to make it start working and generate compensation current. Monitor the size, phase and frequency parameters of the compensation current in real time to ensure that it is consistent with the compensation instruction and meets the compensation requirements of the power grid.

[0031] Step 4: Inject the compensation current, connect the output end of the compensation device to the grid, ensure that the compensation current can be smoothly injected into the grid, and inject the generated compensation current into the grid under the premise of ensuring the safety of the grid to offset the power quality problems of harmonics and reactive power in the grid;

[0032] Step 5: Monitoring and adjustment. During the compensation process, the voltage, current and power factor of the power grid, as well as the working status of the compensation device, are continuously monitored. Based on the monitoring results, if changes in the grid parameters are found or the compensation effect is not ideal, the compensation strategy is adjusted in time, including modifying the compensation instructions and adjusting the compensation device parameters. Key data and events in the compensation process are recorded, including the comparison of grid parameters before and after compensation and the working status of the compensation device, and this information is fed back to the control system for subsequent analysis and optimization.

[0033] Furthermore, the feedback adjustment and optimization includes the following steps:

[0034] Step 1: Collect feedback data, monitor the voltage, current and power factor of the power grid in real time, and the working status of the compensation device, record the comparison of power grid parameters before and after compensation, and evaluate whether the compensation effect meets expectations;

[0035] Step 2: Analyze feedback data, organize the collected feedback data, classify them according to time, location and grid parameters, use data analysis tools and methods to conduct in-depth analysis of the feedback data, evaluate the effectiveness, stability and economy of the compensation strategy, and identify the power quality problems in the grid, the performance bottlenecks of the compensation device and the potential optimization space based on the analysis results;

[0036] Step 3: Formulate adjustment and optimization plans. Based on the analysis results, clarify the optimization goals, design optimization strategies for the identified problems and challenges, and formulate detailed implementation plans, including optimization steps, time nodes, and division of responsibilities, to ensure that the optimization plan can be smoothly implemented;

[0037] Step 4: Implement adjustment and optimization. According to the implementation plan, gradually implement the optimization plan, adjust and optimize the compensation device and control system. During the optimization process, continuously monitor the grid parameters and the working status of the compensation device to ensure the effectiveness of the optimization measures. According to the monitoring results, iteratively adjust the optimization plan until the best compensation effect is achieved.

[0038] Step 5: Evaluate and optimize the results. Compare the grid parameters and compensation effects before and after optimization. Evaluate the effectiveness of the optimization plan. Summarize the lessons learned during the optimization process. Extract replicable and popularizable optimization methods and techniques. Incorporate the optimization experience into daily management processes. Continuously improve and optimize the power quality compensation control method to adapt to the continuous changes and development of the power grid.

[0039] As an improvement, the beneficial effects of the present invention are:

[0040] 1. Improve power quality: By accurately compensating for power quality issues such as harmonics, reactive power and unbalanced current, the power quality of the power grid can be significantly improved.

[0041] 2. Ensure the safety of the power grid: reduce the impact of power quality problems in the power grid on the power grid and equipment, and improve the stability and safety of the power grid.

[0042] 3. Improve energy efficiency: By optimizing the quality of electric energy, reducing reactive power loss and harmonic loss in the power grid, and improving energy efficiency.

[0043] 4. Reduce operation and maintenance costs: Reduce equipment damage and maintenance costs caused by power quality problems, and reduce the operation and maintenance costs of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a general flow chart of a power quality compensation control method of the present invention;

[0045] Figure 2 A flow chart of a power quality compensation control method A of the present invention;

[0046] Figure 3 A flow chart of a power quality compensation control method B of the present invention;

[0047] Figure 4 A flow chart of a power quality compensation control method C of the present invention;

[0048] Figure 5 A flow chart of a power quality compensation control method D of the present invention;

[0049] Figure 6 A flow chart of a power quality compensation control method E of the present invention; DETAILED DESCRIPTION

[0050] In order to make the contents of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0051] A power quality compensation control method mainly comprises the following steps:

[0052] Step 1: Real-time monitoring of grid parameters. Through sensors installed in the grid, real-time monitoring of voltage and current parameters, as well as harmonics, reactive power and unbalanced current power quality indicators in the grid is carried out;

[0053] Step 2: Data analysis and processing: input the real-time monitored grid parameters into the control system, use the control algorithm to process and analyze the data, and obtain the harmonic current, reactive current and unbalanced current that need to be compensated;

[0054] Step 3: Generate compensation instructions. According to the data analysis results, the control system generates compensation instructions and sends them to the power quality compensation device;

[0055] Step 4: Execute the compensation operation. After receiving the compensation instruction, the power quality compensation device injects the compensation current into the power grid through the internal power electronic converter or inverter to achieve accurate compensation for harmonics, reactive power and unbalanced current power quality problems.

[0056] Step 5: Feedback adjustment and optimization. During the compensation process, the control system continuously monitors the changes in grid parameters and adjusts and optimizes the compensation instructions according to actual conditions to ensure the stability and accuracy of the compensation effect.

[0057] In this embodiment, real-time monitoring of power grid parameters includes the following steps:

[0058] Step 1: Deploy monitoring equipment. Deploying monitoring equipment includes selecting monitoring points and installing sensors. Power quality monitoring equipment is deployed at key locations of the power grid, including substations, the starting and ending points of transmission lines, and near important loads. High-precision voltage sensors and current sensors are installed on the monitoring equipment to collect voltage and current signals in the power grid.

[0059] Step 2: Data collection and preprocessing. Data collection and preprocessing include real-time data collection and data preprocessing. Real-time data collection uses sensors to collect voltage and current waveform data in the power grid in real time and converts them into digital signals for storage and transmission. Data preprocessing filters and removes noise from the collected data to improve the accuracy and reliability of the data.

[0060] Step 3: Calculate power quality parameters. Calculating power quality parameters includes Fourier transform and calculating parameters. Fourier transform is performed on the pre-processed voltage and current signals to obtain spectrum information. The calculation parameters are calculated based on the spectrum information to calculate the power quality parameters of the three-phase imbalance, reactive power and harmonic content of the power grid.

[0061] Step 4: Data transmission and storage. Data transmission transmits the calculated power quality parameters to the control center or data analysis system by wired or wireless means. Data storage stores the transmitted data in a database or data warehouse for subsequent data analysis and processing.

[0062] Step 5: Real-time monitoring and alarm. The control center or data analysis system monitors the power quality parameters in the power grid in real time, and performs dynamic analysis and evaluation on them. When the power quality parameters exceed the preset threshold, the system issues an alarm or early warning signal to remind the operation and maintenance personnel to take timely measures to deal with it.

[0063] In this embodiment, data analysis and processing includes the following steps:

[0064] Step 1: Data reception and verification: Receive real-time grid parameter data from monitoring equipment or data acquisition systems, including voltage, current and power factor, verify the received data to ensure the integrity, accuracy and timeliness of the data, check whether there are abnormal values ​​or missing values ​​in the data, and perform corresponding processing, including data interpolation or elimination of abnormal data;

[0065] Step 2: Calculation of power quality parameters. Power quality parameter calculation includes harmonic analysis, reactive power calculation and three-phase imbalance calculation. Harmonic analysis uses Fourier transform to perform spectrum analysis on voltage and current signals and calculate the amplitude and phase of each harmonic. Reactive power calculation calculates the reactive power in the power grid based on the phase difference between voltage and current. Three-phase imbalance calculation calculates the three-phase imbalance index by comparing the imbalance degree of three-phase voltage or current.

[0066] Step 3: Data analysis and evaluation. Data analysis and evaluation include trend analysis, statistical analysis and comprehensive evaluation. Trend analysis conducts time series analysis on power quality parameters to identify the changing trends and periodic laws of parameters. Statistical analysis uses statistical methods to conduct statistical analysis on power quality parameters, including calculating the mean, standard deviation, maximum and minimum values. Comprehensive evaluation conducts a comprehensive evaluation of the power quality of the power grid based on the calculation results of power quality parameters and determines the severity of the problem.

[0067] Step 4: Data visualization and report generation. Use charts and curve visualization methods to display the changing trends and distribution of power quality parameters, so that operation and maintenance personnel can intuitively understand the power quality status of the power grid. Based on the data analysis results, generate a power quality monitoring report, including monitoring time, monitoring points, calculation results of power quality parameters, evaluation conclusions and recommended measures.

[0068] In this embodiment, generating a compensation instruction includes the following steps:

[0069] Step 1: Determine the compensation target. According to the results of data analysis and processing, determine the power quality problems existing in the power grid. According to the severity of the power quality problems and the actual needs of the power grid, set the compensation target, that is, the power quality index that needs to be achieved;

[0070] Step 2: Calculate the compensation amount. According to the compensation target and grid parameters, select the appropriate compensation algorithm, including instantaneous reactive power theory and Fourier transform. Use the compensation algorithm to calculate the current value to be compensated based on the real-time monitored grid parameters and the set compensation target. Determine the compensation strategy based on the calculated compensation current value.

[0071] Step 3: Generate compensation instructions. According to the calculated compensation current value and the determined compensation strategy, write compensation instructions, verify the generated compensation instructions to ensure their accuracy, rationality and feasibility, and send the verified compensation instructions to the power quality compensation device to perform compensation operations;

[0072] Step 4: Monitoring and adjustment. During the compensation process, monitor the grid parameters and the working status of the compensation device in real time to ensure that the compensation effect meets expectations. According to the real-time monitoring results, if the compensation effect is not ideal or the grid parameters change, adjust the compensation instructions in time to ensure the accuracy and stability of the compensation.

[0073] In this embodiment, performing the compensation operation includes the following steps:

[0074] Step 1: receiving compensation instructions. The power quality compensation device receives compensation instructions from the control system through its built-in communication interface, analyzes the received compensation instructions, and extracts the magnitude, phase and frequency information of the compensation current;

[0075] Step 2: Adjust the parameters of the compensation device. According to the compensation instruction information obtained by analysis, adjust the internal parameters of the compensation device, including the duty cycle and frequency of the PWM signal, to generate the required compensation current. After adjusting the parameters, check the device to ensure that the parameter settings are correct and the compensation device can work stably.

[0076] Step 3: Generate compensation current. After confirming that the parameter settings are correct, start the compensation device to make it start working and generate compensation current. Monitor the size, phase and frequency parameters of the compensation current in real time to ensure that it is consistent with the compensation instruction and meets the compensation requirements of the power grid.

[0077] Step 4: Inject the compensation current, connect the output end of the compensation device to the grid, ensure that the compensation current can be smoothly injected into the grid, and inject the generated compensation current into the grid under the premise of ensuring the safety of the grid to offset the power quality problems of harmonics and reactive power in the grid;

[0078] Step 5: Monitoring and adjustment. During the compensation process, the voltage, current and power factor of the power grid, as well as the working status of the compensation device, are continuously monitored. Based on the monitoring results, if changes in the grid parameters are found or the compensation effect is not ideal, the compensation strategy is adjusted in time, including modifying the compensation instructions and adjusting the compensation device parameters. Key data and events in the compensation process are recorded, including the comparison of grid parameters before and after compensation and the working status of the compensation device, and this information is fed back to the control system for subsequent analysis and optimization.

[0079] In this embodiment, feedback adjustment and optimization includes the following steps:

[0080] Step 1: Collect feedback data, monitor the voltage, current and power factor of the power grid in real time, and the working status of the compensation device, record the comparison of power grid parameters before and after compensation, and evaluate whether the compensation effect meets expectations;

[0081] Step 2: Analyze feedback data, organize the collected feedback data, classify them according to time, location and grid parameters, use data analysis tools and methods to conduct in-depth analysis of the feedback data, evaluate the effectiveness, stability and economy of the compensation strategy, and identify the power quality problems in the grid, the performance bottlenecks of the compensation device and the potential optimization space based on the analysis results;

[0082] Step 3: Formulate adjustment and optimization plans. Based on the analysis results, clarify the optimization goals, design optimization strategies for the identified problems and challenges, and formulate detailed implementation plans, including optimization steps, time nodes, and division of responsibilities, to ensure that the optimization plan can be smoothly implemented;

[0083] Step 4: Implement adjustment and optimization. According to the implementation plan, gradually implement the optimization plan, adjust and optimize the compensation device and control system. During the optimization process, continuously monitor the grid parameters and the working status of the compensation device to ensure the effectiveness of the optimization measures. According to the monitoring results, iteratively adjust the optimization plan until the best compensation effect is achieved.

[0084] Step 5: Evaluate and optimize the results. Compare the grid parameters and compensation effects before and after optimization. Evaluate the effectiveness of the optimization plan. Summarize the lessons learned during the optimization process. Extract replicable and popularizable optimization methods and techniques. Incorporate the optimization experience into daily management processes. Continuously improve and optimize the power quality compensation control method to adapt to the continuous changes and development of the power grid.

[0085] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A power quality compensation control method, which mainly includes the following steps: Step 1: Real-time monitoring of grid parameters. Through sensors installed in the grid, real-time monitoring of voltage and current parameters, as well as harmonics, reactive power and unbalanced current power quality indicators in the grid is carried out; Step 2: Data analysis and processing: input the real-time monitored grid parameters into the control system, use the control algorithm to process and analyze the data, and obtain the harmonic current, reactive current and unbalanced current that need to be compensated; Step 3: Generate compensation instructions. According to the data analysis results, the control system generates compensation instructions and sends them to the power quality compensation device; Step 4: Execute the compensation operation. After receiving the compensation instruction, the power quality compensation device injects the compensation current into the power grid through the internal power electronic converter or inverter to achieve accurate compensation for harmonics, reactive power and unbalanced current power quality problems. Step 5: Feedback adjustment and optimization. During the compensation process, the control system continuously monitors the changes in grid parameters and adjusts and optimizes the compensation instructions according to actual conditions to ensure the stability and accuracy of the compensation effect.

2. A power quality compensation control method according to claim 1, characterized in that: The real-time monitoring of power grid parameters comprises the following steps: Step 1: Deploy monitoring equipment, which includes selecting monitoring points and installing sensors. Power quality monitoring equipment is deployed at key locations of the power grid, including substations, the starting and ending points of transmission lines, and near important loads. High-precision voltage sensors and current sensors are installed on the monitoring equipment to collect voltage and current signals in the power grid. Step 2: Data collection and preprocessing, which includes real-time data collection and data preprocessing. The real-time data collection collects voltage and current waveform data in the power grid through sensors in real time and converts them into digital signals for storage and transmission. The data preprocessing performs filtering and denoising operations on the collected data to improve the accuracy and reliability of the data. Step 3: Calculate power quality parameters, wherein the calculated power quality parameters include Fourier transform and calculation parameters, wherein the Fourier transform performs Fourier transform on the pre-processed voltage and current signals to obtain spectrum information, and the calculation parameters calculate the power quality parameters of the three-phase imbalance, reactive power and harmonic content of the power grid according to the spectrum information; Step 4: Data transmission and storage, wherein the data transmission transmits the calculated power quality parameters to the control center or data analysis system by wired or wireless means, and the data storage stores the transmitted data in a database or data warehouse for subsequent data analysis and processing; Step 5: Real-time monitoring and alarm. The control center or data analysis system monitors the power quality parameters in the power grid in real time, and performs dynamic analysis and evaluation on them. When the power quality parameters exceed the preset threshold, the system issues an alarm or early warning signal to remind the operation and maintenance personnel to take timely measures to deal with it.

3. The power quality compensation control method according to claim 1, characterized in that: The data analysis and processing comprises the following steps: Step 1: Data reception and verification: Receive real-time grid parameter data from monitoring equipment or data acquisition systems, including voltage, current and power factor, verify the received data to ensure the integrity, accuracy and timeliness of the data, check whether there are abnormal values ​​or missing values ​​in the data, and perform corresponding processing, including data interpolation or elimination of abnormal data; Step 2: Calculation of power quality parameters, including harmonic analysis, reactive power calculation and three-phase imbalance calculation. The harmonic analysis uses Fourier transform to perform spectrum analysis on voltage and current signals to calculate the amplitude and phase of each harmonic. The reactive power calculation calculates the reactive power in the power grid based on the phase difference between voltage and current. The three-phase imbalance calculation calculates the three-phase imbalance index by comparing the imbalance degree of three-phase voltage or current. Step 3: Data analysis and evaluation, including trend analysis, statistical analysis and comprehensive evaluation. The trend analysis performs time series analysis on power quality parameters to identify the changing trend and periodicity of the parameters. The statistical analysis uses statistical methods to perform statistical analysis on power quality parameters, including calculating the mean, standard deviation, maximum value and minimum value. The comprehensive evaluation performs a comprehensive evaluation on the power quality of the power grid based on the calculation results of the power quality parameters and determines the severity of the problem. Step 4: Data visualization and report generation. Use charts and curve visualization methods to display the changing trends and distribution of power quality parameters, so that operation and maintenance personnel can intuitively understand the power quality status of the power grid. Based on the data analysis results, generate a power quality monitoring report, including monitoring time, monitoring points, calculation results of power quality parameters, evaluation conclusions and recommended measures.

4. The power quality compensation control method according to claim 1, characterized in that: The generating of compensation instructions comprises the following steps: Step 1: Determine the compensation target. According to the results of data analysis and processing, determine the power quality problems existing in the power grid. According to the severity of the power quality problems and the actual needs of the power grid, set the compensation target, that is, the power quality index that needs to be achieved; Step 2: Calculate the compensation amount. According to the compensation target and grid parameters, select the appropriate compensation algorithm, including instantaneous reactive power theory and Fourier transform. Use the compensation algorithm to calculate the current value to be compensated based on the real-time monitored grid parameters and the set compensation target. Determine the compensation strategy based on the calculated compensation current value. Step 3: Generate compensation instructions. According to the calculated compensation current value and the determined compensation strategy, write compensation instructions, verify the generated compensation instructions to ensure their accuracy, rationality and feasibility, and send the verified compensation instructions to the power quality compensation device to perform compensation operations; Step 4: Monitoring and adjustment. During the compensation process, monitor the grid parameters and the working status of the compensation device in real time to ensure that the compensation effect meets expectations. According to the real-time monitoring results, if the compensation effect is not ideal or the grid parameters change, adjust the compensation instructions in time to ensure the accuracy and stability of the compensation.

5. The power quality compensation control method according to claim 1, characterized in that: The performing of the compensation operation comprises the following steps: Step 1: receiving compensation instructions. The power quality compensation device receives compensation instructions from the control system through its built-in communication interface, analyzes the received compensation instructions, and extracts the magnitude, phase and frequency information of the compensation current; Step 2: Adjust the parameters of the compensation device. According to the compensation instruction information obtained by analysis, adjust the internal parameters of the compensation device, including the duty cycle and frequency of the PWM signal, to generate the required compensation current. After adjusting the parameters, check the device to ensure that the parameter settings are correct and the compensation device can work stably. Step 3: Generate compensation current. After confirming that the parameter settings are correct, start the compensation device to make it start working and generate compensation current. Monitor the size, phase and frequency parameters of the compensation current in real time to ensure that it is consistent with the compensation instruction and meets the compensation requirements of the power grid. Step 4: Inject the compensation current, connect the output end of the compensation device to the grid, ensure that the compensation current can be smoothly injected into the grid, and inject the generated compensation current into the grid under the premise of ensuring the safety of the grid to offset the power quality problems of harmonics and reactive power in the grid; Step 5: Monitoring and adjustment. During the compensation process, the voltage, current and power factor of the power grid, as well as the working status of the compensation device, are continuously monitored. Based on the monitoring results, if changes in the grid parameters are found or the compensation effect is not ideal, the compensation strategy is adjusted in time, including modifying the compensation instructions and adjusting the compensation device parameters. Key data and events in the compensation process are recorded, including the comparison of grid parameters before and after compensation and the working status of the compensation device, and this information is fed back to the control system for subsequent analysis and optimization.

6. The power quality compensation control method according to claim 1, characterized in that: The feedback adjustment and optimization comprises the following steps: Step 1: Collect feedback data, monitor the voltage, current and power factor of the power grid in real time, and the working status of the compensation device, record the comparison of power grid parameters before and after compensation, and evaluate whether the compensation effect meets expectations; Step 2: Analyze feedback data, organize the collected feedback data, classify them according to time, location and grid parameters, use data analysis tools and methods to conduct in-depth analysis of the feedback data, evaluate the effectiveness, stability and economy of the compensation strategy, and identify the power quality problems in the grid, the performance bottlenecks of the compensation device and the potential optimization space based on the analysis results; Step 3: Formulate adjustment and optimization plans. Based on the analysis results, clarify the optimization goals, design optimization strategies for the identified problems and challenges, and formulate detailed implementation plans, including optimization steps, time nodes, and division of responsibilities, to ensure that the optimization plan can be smoothly implemented; Step 4: Implement adjustment and optimization. According to the implementation plan, gradually implement the optimization plan, adjust and optimize the compensation device and control system. During the optimization process, continuously monitor the grid parameters and the working status of the compensation device to ensure the effectiveness of the optimization measures. According to the monitoring results, iteratively adjust the optimization plan until the best compensation effect is achieved. Step 5: Evaluate and optimize the results. Compare the grid parameters and compensation effects before and after optimization. Evaluate the effectiveness of the optimization plan. Summarize the lessons learned during the optimization process. Extract replicable and popularizable optimization methods and techniques. Incorporate the optimization experience into daily management processes. Continuously improve and optimize the power quality compensation control method to adapt to the continuous changes and development of the power grid.

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