G - Physics – 01 – R
Patent
G - Physics
01
R
G01R 31/02 (2006.01) G01R 19/00 (2006.01) G01R 29/00 (2006.01) G01R 31/12 (2006.01)
Patent
CA 2469443
Method for detecting partial discharges and diagnostic system for electrical apparatus. The invention provides a method of detecting partial discharges in an electrical appliance insulated in a receptacle and a system of diagnosing the state of the appliance using this method. With the help of an UHF antenna placed in the receptacle of the appliance, the method consists of analysing the spectrum (RS1) of the electromagnetic signal picked up by the antenna and of identifying within the spectrum one or more frequencies of interest (B1, B2), for each of which the signal has an amplitude greater than a predetermined threshold value. To identify the frequency/frequencies of interest, the spectrum of the signal received by the antenna is compared with a reference spectrum (RS2).
Areva T&d Sa
Goudreau Gage Dubuc
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