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ISLANDING DETECTION FOR DISTRIBUTED GENERATION SYSTEM USING VARIOUS METHODS

Megha Patel

Student, Department of Electrical Engineering (Electrical power system), Birla Vishvakarma Mahavidyalaya (Engineering College) Vallabh Vidyanagar, Anand, India

Dr. B. R. Parekh,

HOD, Department of Electrical Engineering, Birla Vishvakarma Mahavidyalaya (Engineering College) Vallabh Vidyanagar, Anand, India

Mr. Keval Velani

Design Engineer, Takalkar Power Engineers and Consultants Vadodara, India

68-83

Vol: 6, Issue: 2, 2016

Receiving Date: 2016-02-29 Acceptance Date:

2016-03-27

Publication Date:

2016-04-29

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Abstract

Customer demands better power quality and reliability. Distributed generation (DG) is widely used due to environmental worries to fulfill additional power requirement. Islanding detection is an important requirement for distributed generation. Several problems are caused, when DG fails to trip at islanding condition. It gives negative impact to the loads and generators. When islanding has occurred, distributed generator must be disconnected as soon as possible. Thus, distributed generator must be equipped with islanding detecting devices like over/under voltage relay, impedance relay, etc. They give trip signals to DGs when islanding is found. In this paper, one case study is analysed with different methods such as voltage measurement, impedance measurement, total harmonic distortion (THD), and negative sequence component. The case study is verified for detecting islanding under different loading condition such as normal condition, islanding situation, and isolation of other DG.

Keywords: Distributed generator (DG), Islanding, Voltage, Impedance, Negative sequence component, Threshold, Total harmonic distortion (THD)

References

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