光伏并网逆变器低电压穿越优化设计研究  

OPTIMIZATION AND DESIGN OF LVRT STRATEGY OF GRID-CONNECTED PV SYSTEM

作　　者：张雅静[1] 郑琼林[1] 卢远宏[1,2] 马亮 

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

出　　处：《太阳能学报》2013年第6期984-990,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金青年基金(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。以所研制的100kW光伏并网逆变器为研究对象,给出了仿真结果和实验验证。试验结果表明,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, feedback control low voltage ride-through （LVRT） strategy of PV grid-connected inverter was proposed. Through adding variation of grid voltage and load current to current loop, the feed-forward control strategy can accelerate current loop＇ s response to interference, and avoid the affection of grid voltage. Choosing 100kW PV grid-connected inverter as the study subject, the simulation and experiment results were given. The experimental results show that the proposed scheme has very good dynamic and static properties, meanwhile, this scheme can inhibit the inverter over current under the grid voltage dip.

关 键 词：大功率 光伏并网 逆变器 低电压穿越 前馈控制 

分 类 号：TM615[电气工程—电力系统及自动化]