一种基于PSCAD/EMTDC仿真平台的SVPWM逆变器控制算法

摘要

Compared with the commonly used sine-wave pulse width modulation (SPWM) method, the Space Vector Pulse Width Modulation (SVPWM) method has higher utilization rate of DC voltage and smaller output waveform distortion. This paper introduces the SVPWM control technology into inverters, and builds a model of three phase inverter based on PSCAD/EMTDC simulation platform and details the implementation of SVPWM modulation method with PSCAD/EMTDC software. Through establishment of a complete control system for simulation and research, it gives the simulation waveforms. The simulation results show the advantages of the SVPWM technique, which is more suitable for high-power applications.%空间矢量脉宽调制法(SVPWM)比传统的正弦脉宽调制法(SPWM)具有较高的直流电压利用率以及较低的输出波形失真度.介绍了三相逆变器的SVPWM控制算法,建立了基于PSCAD/EMTDC仿真平台的三相逆变器模型,并给出了基于PSCAD/EMTDC仿真平台的SVPWM优化控制算法.通过建立一个控制系统来进行仿真和研究,给出了仿真线电压及相电压波形.仿真结果充分显示了SVPWM技术应用于大功率场合的优点.