采用双环控制的光伏并网逆变器低电压穿越  

LVRT of Photovoltaic Grid-Connected Inverter Adopting Dual-Loop Control

作　　者：张雅静[1] 郑琼林[1] 马亮 卢远宏[1] 

机构地区：[1]北京交通大学电气工程学院,北京100044 [2]北京京仪绿能电力系统工程有限公司,北京100009

出　　处：《电工技术学报》2013年第12期136-141,共6页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金青年基金资助项目(51007004)

摘　　要：依据国网电力科学研究院公布的《光伏电站接入电网技术规定》,提出了光伏并网系统基于前馈控制的低电压穿越优化控制策略。前馈控制策略通过将电网电压以及负载电流的变化引入电流环,能有效加快电流环对扰动的反应速率,抵消电网的影响。500kW光伏逆变器的试验结果表明,本文所采用的控制策略有良好的动态性能,能抑制电网电压跌落时的逆变器过电流,保障系统正常运行。According to the grid integration Technical regulation of PV power station published by electric power research institute of China, this paper proposes feedback control low voltage ride-through（LVRT） strategy of photovoltaic grid-connected inverter. Feed-forward control strategy adds variation of grid voltage and load current to current !oop. It can accelerate current loop＇s response to interference, and avoid the affection of grid voltage. The subject of the study is photovoltaic grid-connected inverter. The results of simulation and experiment are given. The experimental results show that the proposed scheme has very good dynamic and static properties, and can inhibit the inverter over current under the ~rid voltage din.

关 键 词：光伏并网 电压跌落 前馈控制 限流 

分 类 号：TM615[电气工程—电力系统及自动化]