Condition monitoring of the disconnectors in the electric power transmission grid with temperature sensors
2013 (English)In: Conference proceedings of 3rd International Conference on Maintenance Performance Measurement and Management, Lappeenranta: Lappeenranta University of Technology , 2013Conference paper (Refereed)
In the electrical substations there are disconnectors, which can be opened to disconnect equipment from high voltage parts. As the disconnectors are normally closed and transfer current owing to their often critical positions in the power grid, it is difficult to maintain them. The purpose is to develop a new online method to monitor disconnectors and a new theory for their ageing, in order to schedule the maintenance better.
Increasing resistance in the contacts could cause high temperatures and eventually failure. Nine IR temperature sensors have been placed on each of six disconnectors together with reference sensors. After cleaning and interpolation of the data, two regressions are made, first between a sensor at a contact and the reference sensor, then adding the square of the current. The method is promising since it explains most of the variation in temperature with a sensor dependent parameter.
Place, publisher, year, edition, pages
Lappeenranta: Lappeenranta University of Technology , 2013.
electric power transmission, reliability, disconnector, condition monitoring, temperature measurement
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject Electrical Engineering
IdentifiersURN: urn:nbn:se:kth:diva-166105OAI: oai:DiVA.org:kth-166105DiVA: diva2:809273
MPMM 3rd International Conference on Maintenance Performance Measurement and Management, MPMM 2013, Lappeenranta, Finland, 12-13 September 2013
FunderSweGRIDS - Swedish Centre for Smart Grids and Energy Storage
QC 201505062015-04-302015-04-302016-09-29Bibliographically approved