Monitoring and diagnosis of faults is electrical substations

摘要

An error monitoring system (80) for a substation (83) comprises one or more arrays (82) of acoustic sensors (90) which, in order to ensure that the limits of a transformer substation and are configured for this purpose, to measure the acoustic pressure waves. A processing circuit arrangement (88) in the error monitoring system (80) and detects errors in the localized substation (83) and comprises a sound sources locating module (102) for detecting a range of a sound source on the basis of the acoustic pressure waves. A beam shaping module (104) of the processing circuit arrangement (88) provides amplified acoustic pressure waves by the removal of background noise and interference noise from the acoustic pressure waves and a components signature classification module (106) in the processing circuit arrangement (88) compares improved acoustic pressure waves with components of signatures, in order to the acoustic pressure waves in different events which errors in said substation (83) can be seen.