Title :
Conventional and time-resolved measurements of partial discharges as a tool for diagnosis of insulating materials
Author :
Gulski, E. ; Morshuis, P.H.F. ; Kreuger, F.H.
Author_Institution :
High Voltage Lab., Delft Univ. of Technol., Netherlands
Abstract :
This paper aims at determining the stage of degradation of a discharging dielectric by a combination of conventional techniques and time resolved techniques. First, discharges in an artificial cavity in polyethylene is analyzed by both techniques. Secondly, internal discharges in epoxy insulation of a current transformer are analyzed, using conventional detection only. The tests indicate that conventional discharge detection including a statistical analyzer (TEAS 570) is well suited for recognizing the stages of deterioration of dielectrics by discharges. This opens the possibility to store discharge patterns of aging stages in an analyzer and monitor the aging of HV equipment, either in service or in laboratory aging tests
Keywords :
ageing; charge measurement; current transformers; epoxy insulation; insulation testing; life testing; partial discharges; polyethylene insulation; power transformer insulation; power transformer testing; HV equipment monitoring; aging stages; artificial cavity; current transformer; dielectric discharge; epoxy insulation; insulating materials diagnosis; internal discharges; partial discharge measurement; polyethylene; statistical analyzer; time-resolved measurements; Aging; Current transformers; Degradation; Dielectric measurements; Dielectrics and electrical insulation; Partial discharges; Pattern analysis; Polyethylene; Power transformer insulation; Testing;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1994., Proceedings of the 4th International Conference on
Conference_Location :
Brisbane, Qld.
Print_ISBN :
0-7803-1307-0
DOI :
10.1109/ICPADM.1994.414098
