三相VSR主电路参数设计与仿真

近年来电力电子变流技术得到迅猛发展,使整流器对电网造成了严重的“污染”,严重地影响了电能质量.通过建立三相VSR的数学模型,重点分析了交流侧电感和直流侧电容对主电路的重要作用.根据VSR的实际运行状况在理论上给出了新的设计方法,为验证设计的合理性,在Matlab/Simulink下建立仿真模型.通过仿真,得出以下结论:系统的动态响应速度明显提高,交流侧的电流跟踪电压波形接近于正弦波,系统功率因数接近于1,对VSR的参数设计有重要的理论指导意义.

Parameters Design and Simulation of Three-Phase VSR Main Circuit

In recent years,the rapid development of power electronic converter technology has caused "pollution" to the power grid by rectifier,which seriously affects the power quality.By establishing the mathematical model of three-phase VSR,the important functions of the AC side inductance and DC side capacitors on the main circuit were analyzed.According to the actual operation of VSR,a new design method was given in theory.To verify the rationality of the design,the simulation model was established under Matlab/Simulink.Through the simulation,the following conclusions are drawn:the dynamic response speed of the system is obviously improved,the AC current tracking voltage waveform is close to the sine wave,and the system power factor is close to 1,which have important theoretical guiding significance for the VSR parameters design.