METHOD FOR ESTIMATING OVERHEATED TEMPERATURE OF OIL-FILLED ELECTRIC DEVICE

Title:

METHOD FOR ESTIMATING OVERHEATED TEMPERATURE OF OIL-FILLED ELECTRIC DEVICE

Document Type and Number:

WIPO Patent Application WO/2017/216890

Kind Code:

A1

Abstract:

The present invention pertains to a method for estimating the overheated temperature of an oil-filled electric device that uses ester oil as insulating oil. In the present invention, the overheated temperature is estimated on the basis of a first concentration ratio between two types of gas components contained in the ester oil, and a second concentration ratio between other two types of gas components contained in the ester oil. The first concertation ratio and the second concentration ratio are selected from the concentration ratio between acetylene and ethane, the concentration ratio between acetylene and hydrogen, the concentration ratio between acetylene and methane, and the concentration ratio between acetylene and ethylene.

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Inventors:

KURIYAMA RYOTA (JP)
KATO FUKUTARO (JP)
HAYAMIZU SHIKI (JP)
MIZUNO KOTA (JP)

Application Number:

PCT/JP2016/067745

Publication Date:

December 21, 2017

Filing Date:

June 15, 2016

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP (JP)

International Classes:

G01K13/00; G01N21/3504; H01F27/00; H01F41/00

Foreign References:

JP5872127B1	2016-03-01
JP2004200348A	2004-07-15
JP2002350426A	2002-12-04
JP3081717U	2001-11-22

Other References: