电力系统自动化Issue(15)：126-131,148,7.DOI:10.7500/AEPS20140721006
基于有效零矢量脉宽调制和 PR 控制的并联零序环流抑制
Zero-sequence Circulating Current Inhibition of Paralleled Inverters Based on Active Zero State PWM and PR Control
摘要
Abstract
Parallel operating inverters with common direct current (DC) power supply can generate zero-sequence circulating current leading to unbalanced load current,output current distortion,system loss increase and so on.To suppress zero-sequence circulating current,an analysis is made of the mechanism and components of zero-sequence circulating current based on its equivalent model first.Then,a new strategy based on the active zero state pulse width modulation (AZSPWM) and proportional-resonant(PR) control is proposed,which uses two opposite active vectors instead of zero vectors to suppress the higher frequency circulating current and reduces the lower frequency circulating current by means of zero-sequence circulating current closed-loop control based on the PR controller.It is able to eliminate circulating current with high-efficiency usage of DC voltage and without increasing the hardware cost.Finally,the effectiveness of the strategy between two parallel inverters is verified on an experimental platform.关键词
逆变器/并联/零序环流/比例-谐振控制Key words
inverters/parallel/zero-sequence circulating current/proportional-resonant control引用本文复制引用
李凯,郑宏,马兰,韩涛,梁政锋..基于有效零矢量脉宽调制和 PR 控制的并联零序环流抑制[J].电力系统自动化,2015,(15):126-131,148,7.基金项目
国家自然科学基金资助项目(61201010) （61201010）
国家高技术研究发展计划(863计划)资助项目(2013AA051002)。This work is supported by National Natural Science Foundation of China(No.61201010) and National High Technology Research and Development Program of China(863 Program)(No.2013AA051002) （863计划）
