一种可实现两组池板独立MPPT控制的新型双逆变器光伏并网变流器

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摘要为了实现光伏系统大容量高效率的运行需求,本文提出一种新型双逆变器串联的光伏并网变流器拓扑.通过建立双逆变器串联系统的数学模型,得出了在光伏系统中抑制共模漏电流的调制方法,进而实现了对双直流侧电压的稳定控制和两组串联光伏池板的独立最大功率点跟踪控制(MPPT),有效降低光伏系统的初始成本并提升发电效率.文中通过仿真和实验,验证了提出方法的有效性.

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	尹靖元
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关键词 ：光伏发电系统, 双逆变器串联, 共模电压差, 最大功率点跟踪

Abstract：For meeting the demands of PV grid-connected system on large capacity and high efficiency, a novel dual series inverter topology is proposed in this paper. By establishing the mathematic model of the dual series inverters system, the method of the modulation with differential value of common current eliminating is implemented. Then the stable control of dual-DC voltage and the independent MPPT control of dual series photovoltaic cells are presented not only reducing the initial cost of the PV system but improving the generating efficiency. Simulation and experiments are made to verify the feasibility of proposed topology and the goodness of strategy.

Key words： PV power systems dual series inverters differential value of CM(common-mode) voltage maximum power point tracking(MPPT)

收稿日期: 2014-09-10 出版日期: 2015-09-14

PACS:

TM464

基金资助:国家自然科学基金资助项目(51307158)

作者简介: 尹靖元男,1987年生,博士,研究方向为新能源发电并网技术,大功率电机驱动技术.金新民男,1950年生,教授,研究方向为电力电子与电力传动.

引用本文:

尹靖元,金新民,杨捷,吴学智,李金科. 一种可实现两组池板独立MPPT控制的新型双逆变器光伏并网变流器[J]. 电工技术学报, 2015, 30(12): 97-105. Yin Jingyuan,Jin Xinmin,Yang Jie,Wu Xuezhi,Li Jinke. A Novel PV Grid-Connected Converter with Independent MPPT Control for Two Sets of PV Cells Using Dual Series Inverters Topology. Transactions of China Electrotechnical Society, 2015, 30(12): 97-105.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2015/V30/I12/97

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