PERFORMANCE ANALYSIS OF DIGITAL OVER CURRENT RELAYS UNDER DIFFERENT FAULT CONDITIONS IN RADIAL AND PARALLEL FEEDERS
DOI:
https://doi.org/10.20319/mijst.2017.s31.146158Keywords:
Over-Current Relay (OCR), Digital Over Current Relay (DOCR), Directional Relays (DR)Abstract
The conventional relays like electromechanical relays, static and microprocessor based digital relays are having their own disadvantages. Digital/ numeric relays are replacing to overcome these drawbacks. Digital protection devices are built with integrated functions and operated using digital binary values. Fast operation, high sensitivity, self-monitoring, low maintenance are the characteristics of the digital/ numeric relays and their cost is also relatively low. Accuracy, flexibility, reliability, multi-functional capability, and working under wide range of temperatures are the advantages of these relays. They have few limitations such as complexity, short life time due to the new technological developments, and susceptibility to power system transients. Digital over Current relays modeling for power system protection has been proposed in this paper. The performance of the proposed relays was tested by applying different types of fault conditions in radial and parallel feeders and results were analyzed. MatLab/Simulink software was used to simulate the proposed protection scheme due to its features like design flexibility and exploration of any physical module.
References
Benmouyal G et al.,(1999) IEEE Standard Inverse-Time Characteristic Equations for Over Current Relays, Int. J. IEEE Transactions in Power System, , Vol.14(3),(pp. 868 – 872).
G.Chandra Sekhar et al.,(2011) “Logic Based Detection of Negative Sequence Currents for Six Phase System” International Journal of Applied Engineering Research”, ISSN 0973-4562, Vol. 6, No. 6, (pp.1311-1322).
Jhanwar V & Pradhan, A.K. , (2008) “Accurate Overcurrent Relay Algorithm using Fundamental Component”, Int. Power System Technology and IEEE Power India Conference, 2008, POWERCON.
M. M. Hussal, et al., (2011)"Digital Directional and Non-Directional Over Current Relays: Modelling and Performance Analysis," NED University Journal of Research, Vol. 8.
Sidhu, T.S. et al.(1991),“Design of a Microprocessor-Based Overcurrent Relay, In: IEEE Western Canada Conference, (pp. 41 – 46).
S.S. Venkata et al. ,(May 1982) “138kV Six Phase Transmission System-Fault Analysis”, IEEE Trans. On PAS, Vol.101, No.5 ,(pp.1203- 1218).
Vahidi, B. &Esmaeeli, E. (September 2010) MATLAB-SIMULINK-Based Simulation for Digital Differential Relay Protection of Power Transformer for Educational Purpose, Int. J Computer Applications on Engineering Education 29.
Yalla V.V.S. Murty, & W.J. Smolinskib , (January 1990) “Design and Implementation of a Versatile Digital Directional Over Current Relay,. International Journal of Electrical Power Systems Research, Vol. 18,Issue no.1,(pp. 47-55).
YG Paithankar & S R Bhide, (2004) “ Fundamentals of Power System Protection”, Prentice- Hall of India Pvt. Limited.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2021 MATTER: International Journal of Science and Technology
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Copyright of Published Articles
Author(s) retain the article copyright and publishing rights without any restrictions.
All published work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
