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 operationKeywords: Power Indices, Islanding Detection, Performance Analysis, Distributed Generation, NDZ.
Highlights
The world is moving towards distributed energy resources (DERs) due to the prevailing global warming threat, a rapid decrease in world conventional energy resources and high transmission losses
The IEEE 1547 standard test system elaborated in Figure 2 is utilized to confirm the proposed islanding detection technique
This study presents a new passive technique based on parameter index active power (P)
Summary
The world is moving towards distributed energy resources (DERs) due to the prevailing global warming threat, a rapid decrease in world conventional energy resources and high transmission losses. These DERs are more reliable, cost-effective, sustainable and efficient to meet world energy needs. Besides the merits of integration of DERs with the power system, the dynamic behavior of these resources is the reason for several technical challenges These challenges include failure of protection, incorrect tripping of feeder relay, islanding operational issue, loss of coordination, fault current locator and auto recloser problems.[2,3] The most significant challenge is known as “islanding”. DERs keeps on supplying power to the load, despite the isolation of the utility from the system[4,5,6] as demonstrated
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