- Title
- Online transformer internal fault detection based on instantaneous voltage and current measurements considering impact of harmonics
- Creator
- Masoum, Ali; Hashemnia, Seyednaser; Abu-Siada, Ahmed; Masoum, Mohammad Sherkat; Islam, Syed
- Date
- 2017
- Type
- Text; Journal article
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/167034
- Identifier
- vital:13645
- Identifier
-
https://doi.org/10.1109/TPWRD.2014.2358072
- Identifier
- ISBN:0885-8977
- Abstract
- This paper investigates the performance of a recently proposed online transformer internal fault detection technique and examines impact of harmonics through detailed nonlinear simulation of a transformer using three-dimensional finite element modelling. The proposed online technique is based on considering the correlation between the instantaneous input and output voltage difference (ΔV) and the input current of a particular phase as a finger print of the transformer that could be measured every cycle to identify any incipient mechanical deformation within power transformers. To precisely emulate real transformer operation under various winding mechanical deformations, a detailed three-dimensional finite-element model is developed. Detailed simulations with (non)sinusoidal excitation are performed and analysed to demonstrate the unique impact of each fault on the ΔV-I locus. Impact of harmonic order, magnitude and phase angle is also investigated. Furthermore, practical measurements have been performed to validate the effect of winding short circuit fault on the proposed ΔV-I locus without and with the impact of system harmonics.
- Publisher
- Institute of Electrical and Electronics Engineers
- Relation
- IEEE Transactions on Power Delivery Vol. 32, no. 2 (2017), p. 587-598
- Rights
- Copyright © 2014 IEEE.
- Rights
- Open Access
- Rights
- This metadata is freely available under a CCO license
- Subject
- 0906 Electrical and Electronic Engineering; Condition monitoring; Finite element and harmonics; Nonlinear power transformer; Power transformer; Online condition monitoring
- Full Text
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