广东电力2017，Vol.30Issue(8)：53-58,6.DOI:10.3969/j.issn.1007-290X.2017.08.009
三相H7电压源型光伏并网逆变器共模电压抑制
Common Mode Voltage Suppression for Three-phase H7 Voltage-source Photovoltaic Grid-connected Inverter
摘要
Abstract
In allusion to the problem of common voltage in typical three-phase non-isolated photovoltaic grid-connected inverter (thereafter as typical inverter), this paper proposes a modulation strategy for suppressing common voltage by controlling zero vector, which is to adopt topology of three-phase H7 voltage-source photovoltaic grid-connected inverter (thereafter as H7 inverter) with seven switches and use five-segment space vector pulse width modulation technology on the basis of analyzing relationship between common voltage and switching state.Meanwhile, it states realization method for modulation strategy.By means of MATLAB/Simulink and MATLAB/Powergui platforms, it performs simulation comparison on the typical inverter and H7 inverter and figures out effective values of common current of these two inverters are respectively 0.716 A and 0.411 A.Fundamental wave amplitude of the former common voltage is greater than that of the later, which indicates the proposed method can effectively suppress common voltage.关键词
非隔离型逆变器/共模电压/三相H7电压源型光伏并网逆变器/空间矢量脉冲宽度调制Key words
non-isolated inverter/common mode voltage/three-phase H7 voltage-source photovoltaic grid-connected inverter/space vector pulse width modulation分类
信息技术与安全科学引用本文复制引用
金建东,窦祥..三相H7电压源型光伏并网逆变器共模电压抑制[J].广东电力,2017,30(8):53-58,6.基金项目
西安工程大学研究生创新基金资助项目(CX201734) （CX201734）
