弱电网条件下光伏并网发电系统的运行及控制  

Operation and Control of the Photovoltaic Grid-connected Power Generation System under Weak Grid Conditions

作　　者：王海旗 刘星廷 冯三勇 WANG Haiqi;LIU Xingting;FENG Sanyong(l.Electric Power Research Institute of State Grid Shanxi Electric Power Company,Taiyuan,Shanxi 030001,China;State Grid Shanxi Electric Power Company,Taiyuan,Shanxi 030001,China)

机构地区：[1]国网山西省电力公司电力科学研究院,山西太原030001 [2]国网山西省电力公司,山西太原030001

出　　处：《山西电力》2023年第1期47-51,共5页Shanxi Electric Power

摘　　要：光伏并网发电要求其在弱电网条件下稳定运行。针对有电压前馈环节控制系统的光伏并网系统,通过改进前馈电压的控制策略和调整控制器参数,以减小并网电流的畸变率,达到了弱电网条件下的并网要求,并在PSCAD仿真环境中对所提出方法的有效性进行了验证。Photovoltaic grid-connected power generation requires stable operation under weak grid conditions.For the photovoltaic grid-connected system with voltage feedforward link control system,the control strategy of feedforward voltage is improved and the controller parameters are adjusted to reduce the distortion rate of grid-connected current,which helps to meet the grid-connected requirements under the weak grid conditions.Finally,the effectiveness of the proposed method is verified by PSCAD simulation.

关 键 词：光伏并网 弱电网 前馈电压 控制器参数 电流畸变率 

分 类 号：TM464[电气工程—电器]