基于电压前馈的光伏逆变器低电压穿越控制策略  

LVRT Control Strategy of PV Based on Voltage Feed-forward Control

作　　者：郭培健[1] 伍丰林[1] 田凯[1] 张超[1] 

机构地区：[1]天津电气传动设计研究所,天津300180

出　　处：《电气传动》2013年第2期31-35,共5页Electric Drive

摘　　要：低电压穿越技术已成为大功率光伏并网逆变器的重要技术之一。提出一种电网电压直接前馈的控制方法,能有效抑制电网电压跌落过程的逆变器输出过流,并尽可能向电网提供无功支撑。经试验证明该方法快速准确判断电网电压低电压故障,实现光伏并网逆变器的低电压安全穿越。Low voltage ride through technique has become one of the most important technologies of PV inverter. A grid voltage feed- forward control method was presentd,which can effectively restrain the over-current while grid voltage drop down, and as far as possible to the power grid to provide reactive power support. Experiments prove that the method is rapid and accurate judgment voltage low voltage fault, realizes low voltage safety through of the PV inverter.

关 键 词：低电压穿越 光伏逆变器 电压直接前馈 

分 类 号：TM615[电气工程—电力系统及自动化]