含源配电系统孤岛运行状态特征识别与诊断

Feature Identification and Diagnosis for Islanding Operation Condition of Active Distribution Systems

孤岛效应是分布式发电中较为重要的问题。现有的孤岛检测方法通常分为三类:即有源孤岛检测方法、无源孤岛检测方法和基于通信的孤岛检测方法。重点研究了OVP/UVP方法,并通过修正分布式电源DG的P-V特性斜率来改进了OVP/UVP方法,修正其斜率为正能有效地减小不可检测区,修正其斜率为负将增大其不可检测区。

Islanding is a relatively important problem in distributed generation. The existing islanding detection methods are usually divided into three kinds,namely active islanding detection method,passive islanding detection method and islanding detection method based on communication. The OVP / UVP method is mainly studied and it is improved through correcting the slope of P-V characteristics in distributed generation（ DG）. It can effectively decrease the non-detection zones by amending the slope to be positive,and it can increase its non-detection zones by amending the slope to be negative.