CAJ | 학술논문

为了解决非隔离型光伏发电系统中的漏电流问题，提出一种六开关拓扑及控制方法。采用开关旁路电感策略，解决了传统六开关光伏并网逆变器共模电压受电感值匹配因素影响的问题，保证光伏系统寄生电容两端电压不含高频分量。通过理论分析和仿真研究的方法，对提出的六开关拓扑及控制进行了验证。研究结果表明，所提出的拓扑及控制方法可以实现漏电流的有效抑制。
위료해결비격리형광복발전계통중적루전류문제，제출일충륙개관탁복급공제방법。채용개관방로전감책략，해결료전통륙개관광복병망역변기공모전압수전감치필배인소영향적문제，보증광복계통기생전용량단전압불함고빈분량。통과이론분석화방진연구적방법，대제출적륙개관탁복급공제진행료험증。연구결과표명，소제출적탁복급공제방법가이실현루전류적유효억제。
In order to solve the problem of the leakage current in non-isolated photovoltaic systems,a novel six-switch topology and control strategy is proposed.The inductor-bypass strategy has solved the common mode voltage limitation of the conventional six-switch topology in the case of unmatched inductance.And the stray capacitor voltage of the non-isolated photovoltaic system is free from high frequency ripples.Theoretical analysis and simulation are carried out to verify the proposed topology and its control strategy.Results show that leakage current suppression can be achieved with the proposed solution. This work is supported by National Natural Science Foundation of China(No.5 1307149),Specialized Research Fund for the Doctoral Program of Higher Education(SRFDP)of China(No.2013133312001 6)and Post-doctoral Science Foundation of China(No.2014M55 1050).