Condition monitoring of disconnectors in the electric power transmission grid with temperature sensors
2015 (English)In: International Journal of Industrial and Systems Engineering, ISSN 1748-5045Article in journal (Other academic) Accepted
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, 2015.
Electric power transmission, disconnectors, electric contacts, temperature measurement, infrared sensors, reliability, condition monitoring
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject Electrical Engineering
IdentifiersURN: urn:nbn:se:kth:diva-167119OAI: oai:DiVA.org:kth-167119DiVA: diva2:813074
FunderSweGRIDS - Swedish Centre for Smart Grids and Energy Storage
QC 201505222015-05-212015-05-212015-06-05Bibliographically approved