Condition monitoring of the disconnectors in the electric power transmission grid with temperature sensors

• 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. 

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

Nyckelord

electric power transmission

reliability

disconnector

condition monitoring

temperature measurement

Electrical Engineering

Elektro- och systemteknik

Publikations- och innehållstyp

ref (ämneskategori)

kon (ämneskategori)