System and method for detecting partial discharge of gas-insulat

Details System and method for detecting partial discharge of gas-insulat System and method for detecting partial discharge of gas-insulat

1991-11-29

1993-04-06

Weider, Kenneth A.

Communications: electrical

Condition responsive indicating system

Specific condition

324424, 324536, 324535, 324455, 324456, 324514, 324520, 324547, 361 85, 361 86, 361 87, 340646, 340647, G01R 3106

Patent

active

052007375

ABSTRACT:
A system and method for detecting partial discharge of gas-insulated switchgear wherein a high-frequency component and the fundamental wave component of the voltage applied to the conductor of the gas-insulated switchgear are detected, the zero-cross point of the fundamental wave component is set as the starting point for the voltage, and the presence of partial discharge and the reason for the occurrence of partial discharge are ascertained based on the phase difference between the phase of the detected high-frequency component and the phase of the starting point of the voltage.

REFERENCES:
patent: 3775676 (1973-11-01), Harrold
patent: 3801899 (1974-04-01), Liao
patent: 4095173 (1978-06-01), Darrel
patent: 4238733 (1980-12-01), Freeman
patent: 4245187 (1981-01-01), Wagner
patent: 4446420 (1984-05-01), Drouet
patent: 4547769 (1985-10-01), Tanigaki
patent: 4670812 (1987-06-01), Doerfler
patent: 5107447 (1992-04-01), Ozawa

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