一种新颖的主动移频式孤岛检测方法

摘要

Anti-islanding is the key problem for photovoltaic grid-connected power generation system.To overcome the shortcoming of the active frequency drift (AFD) method, a novel AFD islanding detection is proposed.The simulation mod-el of the system is established, and the experimental results verify the good performance of the proposed method, which en-sure the power quality recycling to the grid.%在电网发生故障时,及时、准确地检测孤岛效应,对光伏并网发电系统具有重要意义.针对传统频率偏移孤岛检测方法的缺点,提出了一种新的主动移频式孤岛检测方法.在Matlab/Simulink下进行了系统的建模与仿真,并进行了实验研究.实验表明,该方法能够在不同的负载情况下快速、准确地检测出孤岛现象.同时保证了系统的稳定性和回馈电网的电能质量.