DISTANCE RELAY PROTECTION OF AN 11 kV DISTRIBUTION SYSTEM PERFORMANCE ENHANCEMENT USING MICROPROCESSORS

Oputa, O.; Ezeonye, C. S.; Onwuka I. K.; Irokwe, V. N.; Diyoke, G. C.

Authors & affiliations

Oputa, O.

Department of Electrical/Electronic Engineering, Michael Okpara University of Agriculture, Umudike, Abia state.

Ezeonye, C. S.

Department of Electrical & Electronic Engineering, University of Agriculture and Environmental Sciences, Umuagwo, Imo State

Onwuka I. K.

Department of Electrical/Electronic Engineering, Michael Okpara University of Agriculture, Umudike, Abia state.

Irokwe, V. N.

Department of Electrical/Electronic Engineering, Michael Okpara University of Agriculture, Umudike, Abia state.

Diyoke, G. C.

Department of Electrical/Electronic Engineering, Michael Okpara University of Agriculture, Umudike, Abia state.

Abstract

Summary

Transmission and distribution lines are protected against fault in power network using protection methods
and distance relays. This work focused on enhancing the speed of isolating defective circuits from the network
by employing a microprocessor to minimize tripping time of the relay. The microprocessor was programmed
with the help of information from network-wide fault research. Through the application of Power System
Computer Aided Design (PSCAD) software simulations, the designed system's operating time for a line-toline (LLG) fault between lines ABG occurring at 35 km on the tested line with a fault impedance of 5 Ω was
5.4 ms, while the old system, which was the conventional distance relay system without a microprocessor, had
an operating time of 15 ms. In actuality, it was discovered that the new protective mechanism utilizing the
microprocessor increased the average operating speed of the distance protection scheme from 6.144 ms to
4.390 ms, leading to boosting around 28.5% in the operating speed or speed of isolating the malfunctioning
circuit. Also, the average tripping accuracy was improved from 67.5% to 100% for the developed system
which shows 48% increase in accuracy.

Keywords

Index Terms

Operating speed fault type fault impedance distance protection microprocessor.

Citation & details

How to cite this article

Authors: Oputa, O., Ezeonye, C. S., Onwuka I. K., Irokwe, V. N., Diyoke, G. C.

Volume/Issue: Volume 8, Issue 2

Pages: 34-46

Published: September 30, 2024

Affiliations: Department of Electrical/Electronic Engineering, Michael Okpara University of Agriculture, Umudike, Abia state., Department of Electrical & Electronic Engineering, University of Agriculture and Environmental Sciences, Umuagwo, Imo State

Oputa, O., Ezeonye, C. S., Onwuka I. K., Irokwe, V. N., Diyoke, G. C. (2024). DISTANCE RELAY PROTECTION OF AN 11 kV DISTRIBUTION SYSTEM PERFORMANCE ENHANCEMENT USING MICROPROCESSORS. International Journal of Innovative Engineering, Technology & Science (IJIETS), Volume 8, Issue 2, 34-46.

Oputa, O., Ezeonye, C. S., Onwuka I. K., Irokwe, V. N., Diyoke, G. C.. "DISTANCE RELAY PROTECTION OF AN 11 kV DISTRIBUTION SYSTEM PERFORMANCE ENHANCEMENT USING MICROPROCESSORS." International Journal of Innovative Engineering, Technology & Science (IJIETS), vol. Volume 8, Issue 2, 2024, pp. 34-46.

Oputa, O., Ezeonye, C. S., Onwuka I. K., Irokwe, V. N., Diyoke, G. C.. "DISTANCE RELAY PROTECTION OF AN 11 kV DISTRIBUTION SYSTEM PERFORMANCE ENHANCEMENT USING MICROPROCESSORS." International Journal of Innovative Engineering, Technology & Science (IJIETS) Volume 8, Issue 2 (2024): 34-46.

@article{distancerelayprotectionofan11kvdistributionsystemperformanceenhancementusingmicroprocessors2024, author = {Oputa, O. and Ezeonye, C. S. and Onwuka I. K. and Irokwe, V. N. and Diyoke, G. C.}, title = {DISTANCE RELAY PROTECTION OF AN 11 kV DISTRIBUTION SYSTEM PERFORMANCE ENHANCEMENT USING MICROPROCESSORS}, journal = {International Journal of Innovative Engineering, Technology & Science (IJIETS)}, year = {2024}, volume = {Volume 8, Issue 2}, pages = {34-46} }

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