Indian Journal of Science and Technology

Abstract

Objective: In this work, a passive islanding detection technique based on performance analysis of power system indices has been proposed for a hybrid system. Method: The commonly used 12 different power system indices are analyzed on the basis of sensitivity/performance under all possible islanding and non-islanding scenarios, such as capacitor injection/ ejection, load increment/decrement, starting of induction motor, single and three phase faults. Findings: It has been found, based on performance analysis, that active power shows the highest capability to distinguish minute variations in the system. Subsequently, a passive technique, that utilizes active power as a discriminative feature, is proposed. Further, a protracted study is conducted to test the capability of the technique to discern the islanding and non-islanding scenarios of comparable signatures. Application/improvements: This technique presents high accuracy and zero impact on power quality. These characteristics make this technique appropriate for real-world operation
Keywords: Power Indices, Islanding Detection, Performance Analysis, Distributed Generation, NDZ.