光伏逆变器低电压穿越控制策略的研究  

Research on Low Voltage Ride Through Control Strategy of Photovoltaic Inverter

作　　者：党克[1] 胡金[1] 严干贵[1] 

机构地区：[1]东北电力大学,电气工程学院,吉林吉林132012

出　　处：《电力电子技术》2013年第11期22-24,共3页Power Electronics

基　　金：国家自然科学基金(51277024)~~

摘　　要：针对并网光伏系统低电压穿越(LVRT)的能力,提出一种两级单相系统下的LVRT控制策略。该系统在LVRT期间采用电流幅值控制的方法进行逆变器控制。所提出的电流幅值控制方法能根据光伏阵列的输出情况和逆变器的额定功率情况发出相应的有功和无功功率,适用于光伏电站LVRT期间的逆变器控制。该方法能有效稳定电压波动,节省设备投资。实验结果证明了所提方法的合理性。According to low vohage ride through （LVRT） capability of grid-connected photovoltaic system, a control str- ategy based on double-stage single-phase grid-connected photovoltaie system with the function of LVRT is proposed. This system adopts the current amplitude control for the photovohaic power system with the LVRT behavior.The pro- posed maximum current amplitude control can generate the demanded active and reactive power depending on the output power of the photovoltaic array and the power rating of the grid-connected inverter.It can be adapted to meet LVRT grid codes.This system can restrain the voltage fluctuation effectively ,and save the equipment investment.Ex- periments are shown to verify the performance of the proposed method.

关 键 词：光伏逆变器 低电压穿越 电流幅值控制 

分 类 号：TM464[电气工程—电器]