Process and arrangement for recognizing defects in power...

Details Process and arrangement for recognizing defects in power... Process and arrangement for recognizing defects in power...

H - Electricity

02

H

H02H 3/52 (2006.01) G01R 31/40 (2006.01) G07C 3/00 (2006.01) H02H 1/00 (2006.01) H02H 7/26 (2006.01) H02M 7/757 (2006.01)

Patent

CA 2114543

Abstract In order to detect discharge faults early in converter arrangements (2, 2a), in particular high- voltage direct current transmission systems, which could result in a fire, it is proposed that a signal (S) obtained from the converter arrangement (2, 2a) be subjected to a frequency analysis. A fault signal is generated when a change in the frequency spectrum of the signal (S) caused by a fault is detected. Non- characteristic harmonic signal components or inter- harmonic signal components in the frequency spectrum (FS) of the signal (S) are preferably examined here. The frequency analysis may also be performed with the aid of fuzzy logic. FIG 1

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