基于公共耦合点的微电网孤岛判断方法

Method to Detect Microgrid Islanding Based on the Common Coupling Point

由于在含有分布式电源的电网中存在着孤岛效应,因此正确快速检测微电网孤岛对于电力系统的稳定性至关重要。文章通过计算公共耦合点处的瞬时有功功率和无功功率,判断微电网是否处于孤岛状态。并通过PSCAD/EMTDC软件对一个由天然气发电机、双馈感应发电机式风力发电机、光伏发电板以及其它一些用电负荷组成的微电网进行模拟仿真,验证该孤岛检测方法的有效性。

Because there is the islanding effect in the distributed grid,it is of the most importance to detect the islanding effect rapidly and correctly,maintaining the stability of the electric power system.The instantaneous active power and reactive power at the common coupling point are calculated,to judge whether microgrid is under islanding status.A microgrid composed of the nature gas generator,double-fed wind induction generator,photo-voltage generation panel and some other electric loads is simulated by means of PSCAD/EMTDC software,verifying effectiveness of the islanding detection method.