Title :
The application of HV ceramic capacitors to VHF PD monitoring in hydrogenerators
Author :
Kai, Wang ; Yang, Xu ; Qiong, Fang ; Wei, Chen ; Xiaolong, Cao
Author_Institution :
State Key Lab. of Electr. Insulation for Power Equipment, Xi´´an Jiaotong Univ., China
Abstract :
BaTiO3 based ceramic capacitors have been widely used in power system for their excellent withstand ability to high-voltage, wide temperature range and humidity characters. In this paper, these capacitors were used as couplers for VHF (Very high frequency) partial discharge (PD) monitoring instead of micro stack capacitors, which are commonly installed at line terminals of hydrogenerators. The coupler construction and its manufacturing techniques were briefly discussed. The dielectric properties under different circumstances and frequency response of the coupler were also studied. Finally, these couplers were successfully installed in a hydro-plant in China and some valuable data were obtained.
Keywords :
barium compounds; ceramic capacitors; ferroelectric capacitors; ferroelectric ceramics; hydroelectric generators; microstrip couplers; BaTiO3; BaTiO3 ceramic capacitors; HV ceramic capacitors; VHF partial discharge monitoring; couplers; dielectric properties; hydrogenerators; hydroplant; micro stack capacitors; partial discharge; power system; very high frequency partial discharge monitoring; Capacitors; Ceramics; Couplers; Frequency; Humidity; Manufacturing; Monitoring; Partial discharges; Power systems; Temperature distribution;
Conference_Titel :
Properties and Applications of Dielectric Materials, 2003. Proceedings of the 7th International Conference on
Print_ISBN :
0-7803-7725-7
DOI :
10.1109/ICPADM.2003.1218400
