The effect of transformer parameters on reliability assessment with the help of health index
International Journal of Quality & Reliability Management
ISSN: 0265-671X
Article publication date: 12 February 2019
Issue publication date: 24 May 2019
Abstract
Purpose
The purpose of this paper is to study various reliability measures like reliability, mean time to failure (MTTF) and sensitivity of transformer including different parameters of insulating oil/paper as health index.
Design/methodology/approach
The reliability characteristics of transformer incorporating different parameters of insulating oil as well as paper have been evaluated using Markov process incorporating Gumbel–Hougaard copula, Laplace transforms and supplementary variable technique. The parameters taken into consideration are breakdown voltage (BDV) and moisture content (MC) of both insulating oil and paper, and other parameters considered are interfacial tension (IFT), dissipation factor (DF), degree of polymerization (DOP) and furanic content (FC) for insulating oil and paper, respectively. By probability consideration and continuity influence, difference-differential equations have been obtained for the considered model.
Findings
Transition state probabilities, reliability, MTTF and sensitivity of the transformer corresponding to different parameters of insulating oil and paper have been evaluated with the help of aforementioned technique. Variations of reliability with respect to time along with the variations of MTTF and sensitivity have also been examined. Remarkable points during the study have also been pointed out.
Originality/value
Reliability characteristics of the transformer have been evaluated including two parameters: insulating oil and paper with the help of supplementary variable technique, considering two different types of repairs incorporating Gumbel–Hougaard family of copula unlike done earlier. Reliability, MTTF and sensitivity of transformer have been analyzed considering the parameters: BDV, MC, IFT and FC of insulating oil, and BDV, MC, DOP, DF of insulating paper.
Keywords
Citation
Chantola, N. and Singh, S.B. (2019), "The effect of transformer parameters on reliability assessment with the help of health index", International Journal of Quality & Reliability Management, Vol. 36 No. 6, pp. 895-916. https://doi.org/10.1108/IJQRM-08-2018-0215
Publisher
:Emerald Publishing Limited
Copyright © 2019, Emerald Publishing Limited