Implementation of Distance Relay for Standalone System

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GRD Journals- Global Research and Development Journal for Engineering | Volume 1 | Issue 6 | May 2016 ISSN: 2455-5703

Implementation of Distance Relay for Standalone System Abhay Dalal Assistant Professor Department of Electrical Engineering RGCER, Nagpur Pranay Shete Assistant Professor Department of Electrical Engineering YCCE, Nagpur

Mnaish Kurwale Assistant Professor Department of Electrical Engineering RGCER, Nagpur

Parag Shewane Assistant Professor Department of Electrical Engineering DBACER, Nagpur

Pratik Bhele Assistant Professor Department of Electronics Engineering RGCER, Nagpur

Abstract Key role of this paper is to modulate and simulate distance relays using MATLAB. Relays are utilized to protect electric power systems against trouble and power blackouts as well as to regulate and control the generation and distribution of power. The primary function of the protective relay is to sense the fault in the system, is to protect standalone system from islanding, such that the trip coil of the circuit-breaker is energized and the faulty section of the system is disconnected from the rest of the system. Keywords- Fault, Distance relay, islanding, arc resistance, reach

I. INTRODUCTION In this paper the implementation of distance relay using MATLAB has been discuss to protract the standalone system whisch is shown in fig below Wind Generator DFIG

Load

Distribution System

Fig. 1: System Diagram

A. Impedance Relay In an impedance relay, the torque produced by a current element is balance against the torque of voltage element. The current element produces positive (pickup) torque. Whereas voltage element produces negative (reset) torque. In other words, an impedance relay is voltage restrained over current relay. It is used for medium transmission line. If | Zseen | < | Zset | then trip; else restrain X Line fault characteristics

B C

CR= Rarc= Arc reistance R

Trip

R

A

Restrain

Fig. 2: Characteristic of impedance relay

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