大容量链式STATCOM的三角载波移相-开关频率最优PWM法控制策略的研究  

PS-SFO-PWM control for high-power STATCOM employing cascade multilevel inverters

作　　者：王立杰[1] 孙玉坤[1] 孙运全[1] 刘永敏[1] 

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《继电器》2007年第3期41-44,共4页Relay

基　　金：江苏省高新技术项目(BG2004024);江苏省教育厅博士创新项目(1223000017)

摘　　要：提出了适用于大容量链式静止无功发生器(STATCOM)的一种新的脉冲控制策略,即三角载波移相-开关频率最优PWM法(PS-SFO-PWM)。这种新的PWM方法兼具三角载波移相PWM法(PSPWM)法和开关频率优化PWM法(SFOPWM)的优点,在不提高开关频率的情况下,实现等效高频载波的效果,并提高了直流电压的利用率。研究了链式多电平逆变器的PS-SFO-PWM技术,给出了PS-SFO-PWM控制方法的基本算法,并以2个H桥串联的5电平链式多电平变换器为例,通过Matlab仿真,验证了方法的正确性。A new PWM strategy for cascade static synchronous compensator（STATCOM）, called triangular carrier phase shifting-switch frequency optional PWM（PS-SFO-PWM）, is presented, The new PWM strategy has both Triangular carder phase shifting PWM （PSPWM） and switch frequency optional PWM （SFOPWM）, which can bring the same effect of high frequency carder without increas switch frequency, and at the same time improve the use of DC side voltage. Based on the research of PS-SFO-PWM, basic arithmetic of PS--SFO--PWM is proposed in this paper. The method of obtaining initial values by adding single H-bridge switching angles is presented, The improved method is verified by simulating a five-level cascade inverters composed of two series H-bridges based on MATLAB.

关 键 词：链式多电平逆变器 STATCOM PS-SFO-PWM法 牛顿迭代法 

分 类 号：TM761[电气工程—电力系统及自动化]