电力系统保护与控制Issue(9)：120-125,6.
无差拍控制的非隔离型并网逆变器漏电流分析
Deadbeat control for transformerless PV grid inverter leakage current analysis
摘要
Abstract
In order to achieve high quality grid current output of inverter system, it is very important to eliminate the leakage current of the transformerless PV grid inverter. This paper analyzes the mechanism and current loop of leakage current, and based on dead-beat current control principle, illustrates the influence of leakage current on the inverter current and MPPT. It puts forward a kind of single-phase PV grid inverter leakage current compensation methods based on dead-beat current control. Simulation is carried out in Matlab/Simulink environment. The comparison between the model output and experimental measurement shows that using the compensation of the inverter duty ratio can efficiently eliminate the impact of leakage current on the inverter current, so as to avoid the misjudgment in power tracking or the condition that it can't find the maximum power point, in addition, achieve high-quality inverter current output and correct maximum power point tracking.关键词
非隔离型/逆变器/漏电流/无差拍电流控制/MPPTKey words
transformerless/inverter/leakage current/dead-beat current control/MPPT分类
信息技术与安全科学引用本文复制引用
高金辉,邢倩..无差拍控制的非隔离型并网逆变器漏电流分析[J].电力系统保护与控制,2014,(9):120-125,6.基金项目
河南省重点科技攻关项目 （）
