基于MPDPWM与CPSPWM组合调制策略的级联H桥光伏逆变器漏电流抑制方法  

A METHOD OF SUPPRESSING LEAKAGE CURRENT OF CASCADED H-BRIDGE BASED ON HYBRID MODULATION STRATEGY OF MPDPWM AND CPSPWM

作　　者：赵涛[1] 张兴[1] 王付胜[1] 徐君[2] 顾亦磊[2] Zhao Tao;Zhang Xing;Wang Fusheng;Xu Jun;Gu Yilei(School of Electrical Engineering&Automation,Hefei University of Technology,Hefei230009,China;Sungrow Power Supply CO.,LTD.,Hefei230088,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,合肥230009 [2]阳光电源股份有限公司,合肥230088

出　　处：《太阳能学报》2018年第11期3124-3130,共7页Acta Energiae Solaris Sinica

基　　金：国家重点研发计划(2016YFB0900300)

摘　　要：提出一种改进的载波层叠与载波移相组合的调制策略,通过载波层叠调制消除寄生电容电压之和的高频分量,可有效抑制系统漏电流,并可同时保留载波移相调制易于模块化的优势。仿真结果和实验结果均已验证所提调制策略的有效性。To reduce the leakage current,this paper proposes a hybrid modulation strategy combined with modified phase disposition pulse width modulation(MPDPWM)and carrier phase shifting pulse width modulation(CPSPWM),which can make the high-frequency component of parasitic capacitance of PV cell offset each other to suppress system leakage current effectively by using PDPWM and reserve the advantage of modularity by using CPSPWM.Simulation and experimental results verify the effectiveness of the proposed solution.

关 键 词：级联H桥(CHB) 光伏逆变器 漏电流 组合调制策 

分 类 号：TM464[电气工程—电器]