Title :
Experience with directional couplers for partial discharge measurements on rotating machines in operation
Author :
McDermid, W. ; Bromley, J.C.
Author_Institution :
Manitoba Hydro, Winnipeg, Man., Canada
fDate :
6/1/1999 12:00:00 AM
Abstract :
Manitoba Hydro applied directional couplers for on-line partial discharge measurements on selected rotating machines beginning in 1981. With the instrumentation available at that time the measurement was vulnerable to the effects of noise external to the machine. There have been improvements in the available coupling capacitors which have allowed selection of more optimum measuring locations. In addition, new instrumentation has become available which allows some of the more serious noise problems to be overcome. The paper describes these developments as well as some of the stator winding problems which have been detected
Keywords :
capacitors; electric machines; partial discharge measurement; stators; Manitoba Hydro; coupling capacitors; directional couplers; instrumentation; on-line partial discharge measurements; optimum measuring locations; partial discharge measurements; rotating machines; stator winding; Circuits; Coaxial cables; Directional couplers; Instruments; Partial discharge measurement; Partial discharges; Pulse transformers; Rotating machines; Rotation measurement; Stator windings;
Journal_Title :
Energy Conversion, IEEE Transactions on
