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Condition monitoring of disconnectors in the electric power transmission grid with temperature sensors
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.ORCID iD: 0000-0002-2462-8340
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.ORCID iD: 0000-0002-2964-7233
2016 (English)In: International Journal of Industrial and Systems Engineering, ISSN 1748-5037, Vol. 23, no 1, 90-110 p.Article in journal (Refereed) Published
Abstract [en]

This paper presents a method that can be used to rank disconnectors in the electric power system, according to the condition of one of the most critical parts, the contacts. The temperature of the contacts can be continuously measured by a new type of infrared sensor. For the case study, 54 sensors were placed on six disconnectors together with reference sensors measuring the ambient temperature. The measured temperature at each contact is then regressed against the ambient temperature and the current through the disconnector. Both a linear and a quadratic dependency of the current are tested and the quadratic one explains the data best. The coefficient of the current serves as a measure of the condition of the contact. Then, it becomes possible to identify in which contacts the resistance has increased the most. As a consequence, it is possible to make better maintenance decisions for the disconnectors.

Place, publisher, year, edition, pages
InderScience Publishers, 2016. Vol. 23, no 1, 90-110 p.
Keyword [en]
Condition monitoring, Disconnectors, Electric contacts, Electric power transmission, Infrared sensors, Reliability, Temperature measurement, Electric power systems, Infrared detectors, Infrared devices, Temperature, Electric power transmission grids, Infra-red sensor, Maintenance decisions, Measured temperatures, Reference sensors
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-195481DOI: 10.1504/IJISE.2016.075809ScopusID: 2-s2.0-84964761421OAI: oai:DiVA.org:kth-195481DiVA: diva2:1049814
Note

QC 20161125

Available from: 2016-11-25 Created: 2016-11-03 Last updated: 2016-11-25Bibliographically approved

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