Title :
Sensitivity check for UHF PD detection on power transformers
Author :
Meijer, Sander ; Gulski, Edward ; Smit, Johan J. ; Reijnders, H.F.
Author_Institution :
High Voltage Technol. & Manage., Delft Univ. of Technol., Netherlands
Abstract :
It is known that failure due to insulation defects are often preceded by partial discharge activity. Over the last years, online diagnostic methods for power transformers have been investigated. In this paper the sensitivity of one of these methods, the UHF PD detection technique, has been applied on five different high- and medium voltage transformers with power ratings in the range of 14 to 500 MVA. From these experiments, the sensitivity of the UHF technique to detect partial discharges in power transformers has been proven. Based on these results, a sensitivity check similar to GIS is proposed in this paper.
Keywords :
UHF measurement; failure analysis; gas insulated switchgear; insulation testing; partial discharge measurement; partial discharges; power transformer insulation; power transformer testing; sensitivity analysis; 14 to 500 MVA; GIS; UHF PD detection; gas-insulated system; high voltage transformers; insulation failure; medium voltage transformers; online diagnostic method; partial discharge; power ratings; power transformers; sensitivity; ultra-high frequency; Costs; Coupling circuits; Dielectrics; Frequency; IEC standards; Partial discharges; Power transformer insulation; Power transformers; Pulse transformers; UHF circuits;
Conference_Titel :
Electrical Insulation, 2004. Conference Record of the 2004 IEEE International Symposium on
Print_ISBN :
0-7803-8447-4
DOI :
10.1109/ELINSL.2004.1380448
