Goertzel Algorithm Based Islanding Detection Method Based on Small Second Order Harmonic Component for Grid Integrated PV Systems

Abstract

In modern power system many challenges have beenoccur when the distribution generation (DG) integrating to the power grid. One of the major challenges is islanding phenomena, which occurs when the power grid disconnected from the distribution system and disconnected power line still supplied by the DG system. This unintentional phenomenon must be detected to prevent the damage to equipment and hazardous effects to the workers. Active methods have small non-detection zone (NDZ). This paper proposes a new islanding detection method (IDM) based on injecting the harmonic component and monitoring the changes in power system by reducing the islanding detection time and zero crossing effect of the system. A new algorithm is introduced to detect islanding condition. The advantage of using Goertzel Algorithm (GA) is reducing the total number of computational effort.The proposed islanding detection method is small detection time compared to the other techniques.This paper simulate by using the MATLAB/SIMULINK.