中国电机工程学报2013，Vol.33Issue(3)：29-36,前插4,9.
非隔离型三相三电平光伏逆变器的共模电流抑制
Leakage Current Reduction for Transformerless Three-phase Three-level Photovoltaic Inverters
摘要
Abstract
Aiming at leakage current reduction for transformerless three-phase three-level photovoltaic inverters, this paper proposed the common mode model of three-level inverters. Then a kind of improved LCL filter, where the capacitor common point was linked to the DC neutral point, was used to eliminate the leakage current. However, this improved LCL filter changes the mechanism of the neutral-point potential. Traditional algorithms, such as the distribution factor algorithm, are no longer applicable. Therefore, in order to control the neutral-point potential, the distribution factor algorithm was improved and a new generalized distribution factor algorithm was proposed in this paper. Experimental results demonstrate the availability and correctness of the theoretical analysis and algorithm.关键词
光伏逆变器/非隔离型逆变器/改进型LCL滤波器/共模电流/中点平衡控制/分配因子Key words
PV inverter/ transformerless inverter/ improved LCL filter/ leakage current/ neutral-point potential balancing/ distribution factor分类
信息技术与安全科学引用本文复制引用
张兴,邵章平,王付胜,刘萍..非隔离型三相三电平光伏逆变器的共模电流抑制[J].中国电机工程学报,2013,33(3):29-36,前插4,9.基金项目
国家自然科学基金资助项目(51077034). （51077034）
