基于无差拍电压空间矢量控制的SVG仿真研究

摘要

提出一种静止无功发生器无功补偿的新方法——基于无差拍电压空间矢量控制.该方法通过瞬时无功功率理论的无功电流检测法实时检测无功电流,提高了系统响应速度.针对直接电流控制开关频率过高的不足,引入了电压空间矢量技术,分析了电压空间矢量在静止无功发生器中的应用原理.为了消除采样及计算等带来的延时,引入了无差拍控制技术.最后通过Matlab对控制方案做了系统仿真,将无差拍与电压空间矢量SVPWM相结合,分析实时的仿真波形,仿真结果验证了所选控制方案的有效性和可行性.%A deadbeat control method based on voltage space vector was presented for the SVG' s reactive power compensation; and basing on the instantaneous reactive power theory,the real-time detection of reactive current was implemented to improve system response speed.Considering the deficiency of high switching frequency in direct current control,the voltage space vector technology was employed and its application in the SVG (Static var Generator) was analyzed,as well as the deadbeat control technology was presented to eliminate the delay caused by sampling and calculation.Based on Matlab,having the control scheme simulated and the deadbeat combined with SVPWM to analyze real-time simulation waveform,the simulation results verify the effectiveness and feasibility of the selected control scheme.