Title :
Development of tuning type partial discharge detector with noise discrimination and computer aided automation system
Author_Institution :
Dept. of Electr. Eng., Nagoya Univ., Japan
Abstract :
A description is given of a tuning-type detector which has a tuning frequency of 400 kHz with a bandwidth of ±45 kHz, damping the oscillation within 20 μs. The detector has a sensitivity less than 1 pC for a test object of several hundred pF in capacitance without interference from the broadcasting radio frequency. The pulse resolution of 20 μs makes it possible to count pulses at rates less than 3000 pulse/s. For the elimination of external pulse noises, a pulse signal gate system discriminating logically between signal and noise with the difference of pulse polarity was developed along with a balanced detection circuit. An automatic measurement system aided by a personal computer was also developed for the speed-up and high reliability of the measurement
Keywords :
automatic test equipment; insulation testing; interference suppression; microcomputer applications; partial discharges; tuning; 400 kHz; 45 kHz; ATE; automatic measurement system; balanced detection circuit; computer aided automation system; insulation testing; narrowband frequency method; noise discrimination; oscillation damping; partial discharge detector; personal computer; pulse polarity; pulse signal gate system; tuning type; Bandwidth; Circuit noise; Damping; Detectors; Frequency; Object detection; Partial discharges; Pulse circuits; Tuning; Velocity measurement;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1988. Proceedings., Second International Conference on Properties and Applications of
Conference_Location :
Beijing
DOI :
10.1109/ICPADM.1988.38474
