摘要
结合光伏并网系统逆变器的并网控制过程,分析了一种改进的正反馈频率漂移孤岛检测方法,详细阐述了该方法的原理和负载性质对其的影响,通过仿真分析表明所采用的孤岛检测方法的有效性,改进后的方法加快了检测速度,减少了检测盲区和对电力系统的谐波污染。
In the light of the control process of the gridconnected inverter in PV system, this paper proposes a kind of islanding detection method which is based on improved active frequency drift with positive feedback.The theory of the method and influences of the load characteristics on it are elaborated. The simulation results on Simulink show that this improved method can detect the islanding operation effectively with faster detecting speed, smaller non-detection, and less harmonics pollution to the grid.
出处
《电网与清洁能源》
2011年第11期41-45,共5页
Power System and Clean Energy
关键词
光伏并网
孤岛检测
正反馈
主动频移
grid-connected photovohaic
islanding detection
positive feedback
active frequency drift
