능동적 주파수 변환기법의 출력전류 고조파 왜형율 분석

Abstract

As many grid-connected photovoltaic power conditioning systems (PVPCS) are installed in many residential areas simultaneously, these have raised potential problems of network protection on electrical power system. One of the numerous problems is an Islanding phenomenon. In this paper, active frequency drift (AFD) method, one of the anti-islanding methods which is analyzed by current magnitude compensation and calculation of the fundamental component. Both harmonic component and RMS value of the output current for THD analysis are provided and verified by simulation