摘要
以光伏发电系统公共耦合点(PCC)电压跌落为研究对象,从电力系统功率传输理论的角度分析了光伏发电系统PCC电压跌落的电压补偿原理,并网逆变器通过无功功率对PCC电压跌落进行补偿,提出基于瞬时电压幅值的动态无功电流电压跌落补偿策略,搭建了3 kW光伏发电系统实验平台,对提出的补偿策略进行验证,结果表明该方法改善了光伏发电系统的供电电能质量,提高了其并网运行的可靠性与稳定性。
The voltage sag of photovoltaic power generation system at the point of common coupling（PCC） is discussed, the principle of voltage sag within the perspective of power transmission theory in power system is analyzed.Particular- ly, It proposes a dynamic reactive current compensation method to dynamically control of voltage at PCC.A 3 kW ex- perimental prototype is built to validate the effectiveness of the proposed control method, the results show that the proposed method improves the power quality and enhances the reliability and stability of the system.
出处
《电力电子技术》
CSCD
北大核心
2013年第12期54-56,共3页
Power Electronics
基金
国家高技术研究发展计划(863计划)(2011AA05A106)~~
关键词
光伏发电
并网逆变器
电压跌落
无功功率补偿
photovohaic generation
grid-connected inverter
voltage sag
reactive power compensation
