eCite Digital Repository
A practical look at harmonics in power transformer differential protection
Citation
Madzikanda, E and Negnevitsky, M, A practical look at harmonics in power transformer differential protection, Proceedings of the IEEE PES International Conference on Power Systems Technology (POWERCON 2012), 30 October - 2 November, Auckland, New Zealand, pp. 1-6. ISBN 978-1-4673-2868-5 (2012) [Refereed Conference Paper]
Copyright Statement
Copyright 2012 IEEE
DOI: doi:10.1109/PowerCon.2012.6401274
Abstract
Differential protection of transformers traditionally uses second and/or fifth harmonics to block its operation during inrush conditions. The second and/or fifth harmonics produced during fault condition, when a protection system is required to operate, have in some cases blocked or delayed operation of transformer differential protection. The problem is to distinguish fault and inrush situations and allow the protection system to operate when there is fault, and to block it during inrush conditions. In order to achieve this, we propose to measure the rate of change of the third harmonic as an additional indicator of the fault condition. If the rate of change of the third harmonic exceeds some predefined threshold and the second and/or fifth harmonic are detected, the protection system will be allowed to operate, and otherwise it is blocked.
Item Details
Item Type: | Refereed Conference Paper |
---|---|
Keywords: | current transformer saturation, harmonic restraint/blocking, inrush, symmetrical components |
Research Division: | Engineering |
Research Group: | Electrical and Electronic Engineering |
Research Field: | Renewable Power and Energy Systems Engineering (excl. Solar Cells) |
Objective Division: | Energy |
Objective Group: | Renewable Energy |
Objective Field: | Biofuel (Biomass) Energy |
UTAS Author: | Negnevitsky, M (Professor Michael Negnevitsky) |
ID Code: | 83291 |
Year Published: | 2012 |
Deposited By: | Centre for Renewable Power Energy Systems |
Deposited On: | 2013-03-07 |
Last Modified: | 2017-10-03 |
Downloads: | 24 View Download Statistics |
Repository Staff Only: item control page