Design and Development of Three-Zone Distance Relay Protection Scheme at MATLAB Platform
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ORIGINAL CONTRIBUTION
Design and Development of Three-Zone Distance Relay Protection Scheme at MATLAB Platform Suvraujjal Dutta1
•
Sandip Chanda2 • Abhinandan De3
Received: 11 October 2018 / Accepted: 17 October 2020 Ó The Institution of Engineers (India) 2020
Abstract This paper presents an innovative scheme to identify zone of fault occurrence in transmission line of power systems. Traditionally, three-zone protection schemes are used to locate and to island faulty section from the line. During the outage of one of the transmission lines, overloading condition may arise which may cause maloperation of the distance relay employed in the scheme. In pursuit of developing a proper distance relay protection scheme of transmission line with contingency resilience a new dz./dt technique has been implemented in this work. The MATLAB Simulink modeling of the distance protection scheme has been standardized with the help of a numerical relay ADR239A, and some encouraging results have been found. Keywords MATLAB Simulink Three-zone protection Numerical relay distance relay Overloading condition Contingency
& Suvraujjal Dutta [email protected] Sandip Chanda [email protected] Abhinandan De [email protected] 1
Seacom Engineering College, Howrah, West Bengal, India
2
Ghani Khan Choudhury Institute of Engineering and Technology, Malda, West Bengal, India
3
IIEST Shibpur, Howrah, West Bengal, India
Introduction Power system protection has been a challenging sector of engineering for power engineers. Power system which is an enormous interconnected network contains different power generating, consuming, measuring, controlling equipments which are in nexus with each other. Any abnormal event can disturb the harmony of these equipments and may introduce instability to the system. Hence, the protection of power system against these abnormal conditions is of utmost importance. Moreover, a fault or maloperation of a small sector can lower the strength of the whole system which in turn may cause cascading failure or overall collapse of the system. From the advent of the development of this network, power engineers were developing different schemes of protection that will help the system to retain its sustainability in case of any kind of abnormality. In pursuit of developing an alternative protection scheme that may work even in contingency, a literature survey has been conducted. In [1], research has been carried out to assess the distance protection in zone 3 for the detection of voltage instability and subsequent islanding which may result into a major system blackout of large power networks. In [2], a numerical distance relay protection is developed, which detects both line-to-line and line-to-earth faults, with independent operating characteristics. The relay designed in this work responded affirmatively to all the possible faults that can be modeled. In [3], a method to distinguish line overload from genuine faults for distance relays was investigated. A unique frequency estimation techniques an
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