Title :
Insulator surface charge accumulation under DC voltage
Author :
Wang, F. ; Zhang, Q. ; Qiu, Y. ; Kuffel, E.
Author_Institution :
Sch. of Electr. Eng., Xi´´an Jiaotong Univ., China
Abstract :
The phenomena of surface charging are investigated using the capacitive probe method. In order to decrease the charge leakage a new type probe with high resolution is designed. The influence of voltage amplitude, duration, polarity and surrounding humidity on the surface charging are studied. The accumulation competition between positive charges and negative charges is observed. The experimental results show that at different places on the insulator surface the surface charging has different saturation time constants.
Keywords :
capacitive sensors; charge measurement; humidity; polymer insulators; probes; surface charging; 33.1 kV; 40.4 kV; 45.3 kV; DC voltage; PTFE insulators; capacitive probe method; charge leakage; high resolution; humidity; insulator surface; insulator surface charge accumulation; negative charges; positive charges; saturation time constants; surface charging; voltage amplitude; voltage duration; voltage polarity; Calibration; Dielectrics and electrical insulation; Electrostatics; Gas insulated transmission lines; Geographic Information Systems; Humidity; Metal-insulator structures; Probes; Surface charging; Voltage;
Conference_Titel :
Electrical Insulation, 2002. Conference Record of the 2002 IEEE International Symposium on
Print_ISBN :
0-7803-7337-5
DOI :
10.1109/ELINSL.2002.995966
