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Feasibility of a MEMS Sensor for Gas Detection in HV Oil-Insulated Transformer

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3 Author(s)
Bhat, K.P. ; Dept. of Electr. Eng., SUNY - Univ. at Buffalo, Buffalo, NY, USA ; Oh, K.W. ; Hopkins, D.C.

This paper addresses protection of oil-insulated transformers, using a microelectromechanical systems (MEMS) sensor system to augment or replace existing protection techniques. Traditional technologies used for protection and analysis involve pressure and temperature sensing, gas chromatography, and/or a Buchholz relay. The proposed MEMS device is immersed within the insulating fluid, e.g., oil, and primarily consists of multiple microscale turbines centrally shafted to a MEMS generator. The device utilizes relative differences in the velocity, pressure, and flow rate of fluid caused by electric faults. A differential electrical output is produced, which can be coupled to a remote recorder.

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Industry Applications, IEEE Transactions on  (Volume:49 ,  Issue: 1 )