The Optimization Of The Isolated Island Detection Method Of Single Phase Distributed Power Supply

As the world's growing energy consumption and the environment worsening in the world,new energy development and utilization by governments on the agenda,so DG(Distributed Generation,Distributed Generation)technology is developing rapidly.This paper mainly expounds the concept of the island effect and analyzes and discusses its occurrence.At the same time,the paper introduces the main island testing method and the simple comparison.At the same time,a hybrid detection method based on passive blind area was proposed,and the validity of the method was validated by Matlab/Simulink simulation.In the root,and points out that the current positive feedback frequency offset detection methods that are widely used in the existing problems,and based on this method is extended in addition of a new type of modified positive feedback active frequency drift method.The method can real-time judging the characteristic of load,the real-time correction of exerting disturbance signals,the optimization parameters,avoid under different load cases caused by disturbance to add island failed test,etc.Finally,using the Matlab/Simulink simulation platform building simulation model of distributed generation system under the condition of different load characteristics,the islands of the effectiveness of detection method of the modified for validation.