Gas monitor update review of progress in the development of a microelectronic in-situ transformer fault gas analyzer
- Micromonitors, Inc., Sisters, OR (United States)
This report summarizes the ongoing work of Micromonitors, Inc., on behalf of the Electric Power Research Institute (EPRI) under research project RP2445-03. Purpose of the work is to develop, test and commercialize a microelectronic, in-situ mineral oil transformer fault gas analyzer, based on patented metal-insulator-semiconductor (MIS) sensor technology. The work entails fabrication and testing of an array of MIS devices sensitive to hydrogen, carbon monoxide, acetylene and ethylene. Current experimental prototypes are comprised of an array of three sensors mounted on an alumina substrate with an integrated heater to control temperature. The sensor package is configured in a probe assembly with attached analog circuitry. Analog-to-digital conversion and digital processing occur in a separate NEMA 4X enclosure. Gas concentrations are calculated using a matrix-based algorithm installed in a Motorola MC68HC11 microprocessor. The {alpha}-phase of the field demonstration of Micromonitors` analyzer was initiated in October, 1993, at the Bonneville Power Administration (BPA) Alvey Substation and culminated with installations at BPA`s Celilo Converter Station in September, 1994. We report on the performance of the field units, all 12 of which are currently operating. The development of improved resolution of the four fault gases is reviewed.
- Research Organization:
- Electric Power Research Inst. (EPRI), Palo Alto, CA (United States); Cambias and Associates, Covington, LA (United States)
- OSTI ID:
- 269637
- Report Number(s):
- EPRI-TR-105838; CONF-9411304-; TRN: 96:003582-0015
- Resource Relation:
- Conference: 3. substation equipment diagnostics conference, New Orleans, LA (United States), 1-3 Nov 1994; Other Information: PBD: Mar 1996; Related Information: Is Part Of Proceedings: Substation equipment diagnostics conference III. Proceedings; PB: 299 p.
- Country of Publication:
- United States
- Language:
- English
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