Title :
Partial discharge measurements in dielectric liquids under impulse voltage
Author :
Yamashita, Hisanao
Author_Institution :
Keio Univ., Yokohama, Japan
fDate :
12/1/1993 12:00:00 AM
Abstract :
Current pulses caused by partial discharges (PDs) are measured using light-emitting diodes (LEDs) and fiber optics under impulse voltage conditions. This system has the advantage of having good isolation from the HV power supply and no effect from electromagnetic noise as compared with ordinary systems. It can detect a PD pulse having a half width of 3 ns, and has the capability of measuring PD pulse charges in the range of 1 to 2000 pC, when the optimum DC bias is applied. PD pulses and light emission or streamer formation in dielectric liquids are measured simultaneously by using an image converter camera
Keywords :
electric breakdown of liquids; electric current measurement; fibre optic sensors; light emitting diodes; optical variables measurement; partial discharges; 3 ns; HV power supply isolation; LEDs; PD pulse charges; current pulses; dielectric liquids; fiber optics; image converter camera; impulse voltage; light-emitting diodes; optimum DC bias; partial discharge measurements; streamer formation; Current measurement; Dielectric liquids; Dielectric measurements; Electromagnetic measurements; Light emitting diodes; Optical pulses; Partial discharge measurement; Partial discharges; Pulse measurements; Pulsed power supplies;
Journal_Title :
Electrical Insulation, IEEE Transactions on
