摘要
光伏并网发电系统除了具有过压、欠压、过频、欠频等常规保护外,还应具有一种特殊的保护功能———孤岛保护。被动式孤岛保护常采用过压欠压检测和相位突变检测相结合的方法。两种被动保护相结合能够保护绝大部分孤岛现象。但当PV系统输出功率和负载匹配时,被动式孤岛检测方法失效。因此,本文采用被动式孤岛检测和主动频率偏移(AFD)相结合的孤岛检测方法,实现了孤岛效应的无盲区检测。
Gridconnected PV system in addition to having over- voltage, under-voltage, overfrequent, less- frequent, such as conventonal protection, we must also have a special kind of protection - Gudao protection. Gudao passive protection regularly use the combine methods of over - voltage under - voltage detection and phase mutation detection. The combination of two types of passive protection to protect the vast majority of island phenomenon. However, when the PV system output power and load match, the passive detection method Gudao failure, Therefore, the use of passive and active Gudao detection frequency deviation （AFD） combining Gudao detection methods, the achievement of the island effect of the non - blind spot detection.
出处
《灯与照明》
2009年第1期59-62,共4页
Light & Lighting
关键词
并网
孤岛效应
检测
孤岛保护
grid
island effect
detection
Gudao protection
