基于虚拟空间矢量过调制策略的逆变器共模电压抑制方法  

Suppression method of inverter common-mode voltage based on virtual space vector over-modulation strategy

作　　者：王顺 杨淑英[1] 李一 谢震[1] WANG Shun;YANG Shuying;LI Yi;XIE Zhen(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽合肥230009

出　　处：《电力自动化设备》2022年第3期76-81,96,共7页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51877062);中国电力科学研究院有限公司研究项目(NYB51201902402);台达电力电子科教发展计划项目(DREK202004)。

摘　　要：虚拟空间矢量调制(VSVM)技术因其在共模电压(CMV)抑制方面的独特优势而受到关注,但相较于空间矢量脉宽调制(SVPWM)策略,其线性调制范围较小,影响了逆变器的电压输出。分析了使用和弃用零矢量调制策略的CMV特性和线性调制范围,在此基础上提出了基于VSVM的过调制策略,推导出该策略下过调制补偿角与调制比之间的关系式,并设计了所提策略的具体实现过程。最后通过实验分析了采用所提策略时逆变器的CMV特性和线性调制范围等,实验结果验证了理论分析的正确性和所提策略的可行性。VSVM(Virtual Space Vector Modulation)technology has received wide attentions for its distinct merits in CMV(Common-Mode Voltage)suppression.Compared with SVPWM(Space Vector Pulse Width Modulation)strategy,the allowable linear modulation range of VSVM strategy is reduced,which affects the output voltage of the inverter.The CMV characteristics and the linear modulation range with and without zero-vector modulation strategy are analyzed.On this basis,an over-modulation strategy for VSVM strategy is proposed,and the mathematical relationship between the over-modulation compensation angles and the modulation ratios is deduced,and the implementation process of the proposed strategy is designed.Finally,the inverter CMV characteristics and the linear modulation range with the proposed strategy are analyzed by the experiments.The experimental results verify the correctness of theoretical analysis and the feasibility of the proposed strategy.

关 键 词：虚拟空间矢量调制 共模电压 过调制 调制范围 逆变器 

分 类 号：TM464[电气工程—电器]