基于空间矢量的三相四线系统DSTATCOM仿真

Three-dimensional SVM Algorithm DSTATCOM in Three-phase Four-wire System

选取中点引出式三电平逆变器作为配电网静止无功发生器(DSTATCOM)的主电路,提出一种新型三维空间矢量调制(3-D SVM)算法,将参考电压矢量分解为一个基矢量和一个两电平矢量,三电平3-D SVM的问题转化为两电平3-D SVM问题,从而简化了三电平3-D SVM算法。实现了三相四线系统DSTATCOM的并联补偿,最后使用PSCAD/EMTDC进行了仿真,仿真和实验结果表明此控制算法具有良好的不平衡补偿能力。

A midpoint leads to type three-level inverter as a main circuit of the distribution static var generator（DS- TATCOM） is presented ;a three dimensional space vector modulation （3-D SVM） is changed into two dimensional space vector modulation （2-D SVM） algorithm principle.The simulation model of the inverter is built up by PSCAD/ EMTDC.The simulation and experimental results show that the method has the better compensation capacity and unbalance inhibiting behaviors.