Method and system for corona source location by acoustic signal

Details Method and system for corona source location by acoustic signal Method and system for corona source location by acoustic signal

1976-12-27

1978-06-13

Strecker, Gerard R.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

G01R 3108, G01R 3106

Patent

active

040951731

ABSTRACT:
To locate a corona fault in a transformer or other encased electrical apparatus by determining the propagation time for acoustic noise generated by a corona discharge, the electrical corona signal is gated and level-detected during an interval which is adjustable as to delay and length to thereby generate a timing reference to initiate acoustic signal averaging. The corona pulse can be found that results in an optimum signal-to-noise ratio in the acoustic signal being averaged, as is needed with limited test data in a noisy or reverberant acoustic environment. Also, multiple corona sources can be located.

REFERENCES:
patent: 3430136 (1969-02-01), Brustle et al.
patent: 3707673 (1972-12-01), Carter
patent: 3801899 (1974-04-01), Liao
patent: 3991364 (1976-11-01), Wiznerowicz

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