多电平逆变器延时叠加SVPWM调制方法的研究与实现  

Research & implementation of a new multilevel inverter modulation method

作　　者：郑征[1] 闫飞 邹瑾[3] 

机构地区：[1]河南理工大学电气工程与自动化学院,河南焦作454000 [2]希望森兰科技服份有限公司,成都610207 [3]剑桥大学电力工程系电力电子组

出　　处：《河南理工大学学报（自然科学版）》2014年第1期64-69,共6页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家自然科学基金资助项目(61340015);河南省国际合作项目(144300510014);河南理工大学博士基金资助项目(B2012-108)

摘　　要：载波移相SPWM调制方法存在开关损耗大、直流电压利用率低等不足,且不易于和矢量控制、直接转矩控制等高性能的控制系统相结合。SVPWM调制方法因具有直流电压利用率高、动态性能好、易于数字化实现等优点在两电平控制领域得到了广泛的应用,但直接应用于多电平逆变系统由于开关状态过多导致不易实现。采用一种新型的延时叠加SVPWM调制方法,在不增加算法复杂性的前提下,把SVPWM调制方法应用到级联H桥高压变频器系统中,通过Matlab仿真并在实验室380V三单元级联变频器设计项目中对其进行测试,仿真与实验结果有力地证明了这种调制方法的的可行性和正确性。The carrier phase-shifted SPWM modulation method not only has the disadvantages of large switching loss and the poor utilization rate of DC voltage,but also has the poor dynamic performances.This paper puts forward a new type of delay superposition of SVPWM control strategy based on the sample time-staggered thought of carrier phase-shifted SPWM modulation method.This modulation method regards a multilevel system as a combination of two-level systems,which is simple in controlling and easy to realize.In addition,it is successfully applied to a cascaded H-bridge multilevel-inverter system based on DSP ＋ FPGA.The simulation and experimental results show that this method not only solves the problem that SVPWM modulation method is difficult to apply to a multilevel system because of too many synthesis switch states,but also reaches to a high DC voltage utilization ratio with a simple algorithm and a good dynamic performance.

关 键 词：高压变频器 直流电压利用率 SVPWM DSP+ FPGA 

分 类 号：TM464[电气工程—电器]