电力系统自动化Issue(4)：78-84,7.DOI:10.7500/AEPS20150316006
基于电网电压前馈补偿的光伏并网逆变器零电压穿越控制
Zero Voltage Ride-through Control Strategy of Photovoltaic Grid-connected Inverter Based on Compensation for Phase of Feed-forward Grid Voltage
摘要
Abstract
According to the national standard,the high-power photovoltaic gird-connected inverter should have the zero voltage ride-through(ZVRT) ability of avoiding automatic off-grid phenomenon under the condition of low voltage,which will affect the stable operation of power system.Based on an analysis of the standard about ZVRT of photovoltaic grid-connected inverter, some key technologies including the separation of positive from negative sequence of grid voltage,phase-lock loop (PLL),the control strategy of active/reactive current,the control strategy of inverter under the condition of unbalanced grid voltage,etc are discussed.In addition,the leading phase compensation for the feed-forward component of grid voltage is proposed and introduced into the current loop of control system to limit the current overshoot during the transients of ZVRT.The effectiveness of the proposed ZVRT control strategy is verified by simulation on RTDS and experimental results of a 500 kW prototype. This work is supported by State Grid Corporation of China.关键词
光伏发电/并网逆变器/零电压穿越/电网电压前馈/控制策略Key words
photovoltaic power generation/grid-connected inverter/zero voltage ride-through (ZVRT)/feed-forward of grid voltage/control strategy引用本文复制引用
韦徵,王俊辉,茹心芹,宋飞,王彤,李国栋..基于电网电压前馈补偿的光伏并网逆变器零电压穿越控制[J].电力系统自动化,2016,(4):78-84,7.基金项目
国家电网公司科技项目“大型光伏发电站集电系统谐波及过电压问题研究”“面向弱离网的大型光水储联合供电运行控制系统关键技术研究及应用”“户用光伏发电系统关键技术研究与示范应用”。 （）
