传统的分布式光伏并网孤岛效应检测方法正确率的研究

RESEARCH ON THE ACCURACY OF TRADITIONAL DETECTIONMETHODS FOR ISLANDING OF DISTRIBUTED PVGRID-CONNECTION

近年来,针对分布式光伏并网孤岛效应的检测方法在不断优化。在针对分布式光伏并网的传统防孤岛保护技术中,基于光伏逆变器本身的孤岛效应检测方法主要有被动孤岛检测方法和主动孤岛检测方法,对二者的基本原理进行分析,并对不同判断依据及影响因素进行设置,然后采用仿真算例得到不同判断依据时孤岛效应检测方法的相对动作正确率,以期通过此方法为分布式光伏并网防孤岛保护的优化和完善提供一定的参考。

In recent years,detection methods of islanding for distributed PV grid-connection are constantly optimized.There are two main detection methods based on PV inverter:passive detection and active detection.Based on the analysis of the basic principles of these two methods and setting different criterions and influencing factors,the relative movement accuracy under different conditions is obtained by simulated examples.It can be reference for the optimization and improvement of anti-island protection for distributed PV grid-connection.