SVPWM过调制算法的理论分析与实验应用  

Theoretical Analysis and Experimental Application of Overmodulation Algorithm Based on SVPWM

作　　者：吕敬[1] 张建文[1] 王晗[1] 蔡旭[1,2] 

机构地区：[1]上海交通大学电子信息与电气工程学院风力发电研究中心电力传输与功率变换控制教育部重点实验室,上海200240 [2]上海交通大学船舶海洋与建筑工程学院海洋工程国家重点实验室,上海200240

出　　处：《电气传动》2011年第8期7-11,共5页Electric Drive

基　　金：海洋工程国家重点实验室自主基金(AE010803);上海市科技发展基金(08DZ1200504;09DZ1201303)

摘　　要：过调制算法能够有效提高逆变器的输出基波电压,对缩短电动机的动态响应时间、扩大稳态运行区域是十分有意义的。研究了一种基于SVPWM的过调制算法,并对过调制区的谐波成分进行了分析。最后在Matlab/Simulink仿真软件和350 kW鼠笼式异步发电机全功率变换器实验平台上进行了验证。结果表明,该过调制策略可实现在整个调制范围内PWM逆变器输出基波电压的线性控制,最终达到逆变器的六阶梯波运行状态。Overmodulation strategy can effectively raise the inverter output fundamental voltage. So it is very meaningful for reduing motor dynamic response time and extending the operation area of steady-state. An overmodulation algorithm based on SVPWM was studied, and harmonic components of the output voltage in overmodulation zones was analyzed. Finally, Matlab/Simulink software and 350 kW squirrel cage induction generator（SCIG） full-power converter experimental platform were using to validate the method. The results show that the overmodulation strategy can achieve the linear control of PWM inverters output fundamental voltage during the entire modulation range and finally reach six-step operation.

关 键 词：空间矢量PWM 过调制 电压源逆变器 电压利用率 线性控制 

分 类 号：TM464[电气工程—电器]