SVG Research Based On Improved Duplicate Control Strategy

With the development of industry,computer control technology is becoming more and more popular.The application of computer promotes the development of industrial control.Computer control technology is used more and more in industry.TIn this paper,computer simulation technology MATLAB and intelligent control technology are introduced into the dynamic reactive power compensation device(SVG)of power system.The advanced computer control algorithm is used to complete the control of SVG,To solve the problem of poor stability of conventional SVG.The main research work includes:Firstly,based on the schematic diagram of the conventional SVG working system,the working principle of the SVG whole machine involves related control modules and workflows,and each module involves related technical fields,especially related to the introduction of Instruction extraction operation module,current inner loop control module,drive modulation control module;Based on the SVG mathematical model in the abc coordinate system,combined with abc to the transformation matrix relationship under the rotating coordinate system,This paper completes the transformation and analysis of the mathematical model of SVG in the rotating coordinate system.Secondly,the paper completes the research and analysis design of the instruction current extraction algorithm,completes the principle introduction of the digital phase-locked loop related to SVG control work and its digital design work,and carries out certain simulation verification work for the digital phase-locked loop work to verify the digital lock,verifies the effectiveness of digital phase-locked loops in a fixed sampling frequency mode of operation.Thirdly,this paper compares and analyzes the effectiveness of the traditional PI controller and the limitations of the control effect.This paper combining the dynamic characteristics of PI control with the high steady-state accuracy of RC repetitive control,designs an improved composite control strategy for SVG inner loop.Fourthly,for the research work of the control algorithm of this paper,this paper build the overall simulation model based on the operating characteristics and load conditions of the reactive power compensation device engineering site,simulate the load current waveform;In this paper,the overall compensation performance of the reactive power compensation device,the steady-state accuracy index of the compensation current,and the overall dynamic performance index of the reactive power compensation device are simulated.In this paper,the improved repetitive controller designed and the traditional PI controller are compared and simulated to verify the effectiveness of the improved composite controller.Based on this control algorithm,the guarantee effect is guaranteed and verified.