Title :
Current pulse measurement system using LED in dielectric liquids under impulse voltage conditions
Author :
Yamazawa, K. ; Uemura, M. ; Yamashita, H. ; Forster, E.O.
Author_Institution :
Dept. of Electr. Eng., Keio Univ., Yokohama, Japan
Abstract :
The time response and the charge sensitivity of an LED (light emitting diode) current pulse measurement system (LCPMS) are evaluated. In addition, the current pulse and the streamer initiation in dielectric liquids are measured simultaneously by using this system and a high-speed shadowgraph system under impulse voltage conditions. It is concluded that the LCPMS can measure partial-discharge (PD) pulses under impulse voltage conditions. The charge sensitivity of the LCPM is markedly increased by applying an optimal DC drive current to the LED. PD inception and streamer initiation were measured in cyclohexane under impulse voltage conditions. A PD current pulse of 8.2 pC was measured during negative streamer initiation
Keywords :
organic compounds; LED; PD inception; charge sensitivity; current pulse measurement system; cyclohexane; dielectric liquids; high-speed shadowgraph system; impulse voltage conditions; light emitting diode; negative streamer initiation; optimal DC drive current; partial-discharge; streamer initiation; time response; Current measurement; Dielectric liquids; Dielectric measurements; Light emitting diodes; Partial discharges; Pulse measurements; Pulse transformers; Space vector pulse width modulation; Time measurement; Voltage;
Conference_Titel :
Conduction and Breakdown in Dielectric Liquids,1993., ICDL '93., IEEE 11th International Conference on
Conference_Location :
Baden-Dattwil
Print_ISBN :
0-7803-0791-7
DOI :
10.1109/ICDL.1993.593966
