System for monitoring gas insulated substations
US5396180A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 1993 |
| Grant date | Mar 7, 1995 |
| Priority date | — |
| Expiry date | May 3, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/1254
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A diagnostic measuring system (20) for gas insulated electrical substations having UHF couplers (11) fitted to bus chambers (12) monitors for partial discharge events within the chamber (12) to identify the nature and location of an emergent breakdown condition. The system (20) identifies each partial discharge event but characterizes it by amplitude and its time of occurrence with respect to the start of the 50 Hz power frequency wave. The characterized events are communicated over an optical fiber link (13) configured as a token passing ring to an analyzer (25) where a comparison is made with stored historic data characterizing known events. The analyzer (25) provides a self checking routine for the system (20). A microprocessor (36) forming part of a unit (21) associated with a plurality of couplers (11) provides data compression of events identified from these couplers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.