中国电机工程学报2013，Vol.33Issue(9)：17-24,前插3,9.
三相三电平模块化光伏并网系统的零序环流抑制
Zero-sequence Circulating Current Reduction for Three-phase Three-level Modular Photovoltaic Grid-connected Systems
摘要
Abstract
According to the problem that the zero-sequence circulating current exists in the three-phase three-level modular photovoltaic grid-connected systems sharing positive,negative and AC buses,the equivalent model of the zero-sequence circulating current was proposed in this paper.The zero-sequence circulating current was divided into three types according to different exciting sources.Firstly,a parallel scheme sharing positive,negative and neutral buses was proposed to reduce the first type of the zero-sequence circulating current.Secondly,a parallel scheme based on the improved LCL filter was proposed to reduce the high frequency component of the second and third type of the zero-sequence circulating current.Thirdly,a controller was used to reduce the low frequency component of the second and third type of the zero-sequence circulating current.A three-phase three-level modular photovoltaic grid-connected system rated 10 kW was built,and simulation results and experimental results demonstrate the correctness of the model analysis and reduction methods of the zero-sequence circulating current.关键词
三电平/光伏/模块化/并联/零序环流Key words
three-level/ photovoltaic/ modular/ parallel/zero-sequence circulating current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,任康乐..三相三电平模块化光伏并网系统的零序环流抑制[J].中国电机工程学报,2013,33(9):17-24,前插3,9.基金项目
国家自然科学基金项目(51277051) （51277051）
Project Supported by National Natural Science Foundation of China (51277051). （51277051）
