基于PI控制的频率正反馈孤岛技术研究  

Research on Islanding Based on PI Control of Frequency Positive Feedback

作　　者：刘福成[1] 芦开平[1] 刘刚[1] 李建伟[1] 

机构地区：[1]许继集团有限公司,河南许昌461000

出　　处：《电力电子技术》2015年第6期97-100,共4页Power Electronics

摘　　要：以光伏逆变器为对象,研究了一种带正反馈的主动移频法扰动(AFD)与无功电流幅值扰动相结合的主动式反孤岛效应的控制方法。与其他主动式反孤岛效应控制方法相比,有效地解决了注入电网谐波含量和影响电能质量等问题,可减小孤岛检测盲区,并能迅速反映逆变器输出电压频率的变化,灵敏地检测出孤岛状态。最后通过仿真和实验分析了该扰动控制方法的正确性。A control method of islanding effect is researched based on the combination of active frequency-shifted disturbance （AFD） and reactive power current amplitude perturbation for the photovohaic grid-connected inverter.Compared with other active control method of islanding effect, it can effectively solve the problems of pouring harmonic wave to utility grid and affecting power quality,and quickly reflect the changes of inverter output frequency, sensitively detecting the island state.Finally, the properties of reactive power disturbances control method are analyzed by simulations and experimental results which can verify the effectiveness of the control method.

关 键 词：逆变器 主动移频法扰动 无功电流幅值扰动 

分 类 号：TM464[电气工程—电器]