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HEALTH INDEX AS CONDITION ESTIMATOR FOR POWER SYSTEM EQUIPMENT:A CRITICAL DISCUSSION AND CASE STUDY
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering. KTH Royal Institute of Technology. (Reliability Centred Asset Management (RCAM) Group)ORCID iD: 0000-0002-3543-9326
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering. KTH Royal Institute of Technology. (Reliability Centred Asset Management (RCAM) Group)ORCID iD: 0000-0002-2964-7233
2017 (English)In: CIRED - Congrès International des Réseaux Electriques de Distribution, 2017., 2017Conference paper, (Refereed)
Abstract [en]

Over the past decade, the health index has become an increasingly popular asset management tool in utilities. The health index as a condition indicator can improve the decision making process. However, it also has challenges which need to be considered during development and implementation. This paper addresses the advantages and disadvantages of the health index as a condition indicator in a critical discussion. Moreover, a case study is presented where a health index is calculated for three transmission power transformers. The case study illustrates that age and the load factor included in the health index calculation lead to an immoderately high health index for the transformers T2 and T3. Thus, the paper ageing of the transformer windings are used instead which results in a plausible condition representation of all three transformers. The case study also demonstrates that the observation of condition trends over time is lost if the health index is transformed into a linguistic expression.

Place, publisher, year, edition, pages
2017.
National Category
Engineering and Technology
Research subject
Electrical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-210905OAI: oai:DiVA.org:kth-210905DiVA: diva2:1120997
Conference
24th International Conference on Electricity Distribution - CIRED Glasgow, 12-15 June 2017
Available from: 2017-07-07 Created: 2017-07-07 Last updated: 2017-07-07

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