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Title:
METHOD FOR DIAGNOSING OIL-FILLED ELECTRICAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/207680
Kind Code:
A1
Abstract:
The present invention is a method for diagnosing an oil-filled electrical device in which the degradation state of the oil-filled electrical device is evaluated. Oil-filled electrical devices include an insulating oil. A mineral oil is being replaced by a vegetable oil as the insulating oil. A method for diagnosing an oil-filled electrical device according to the present invention includes a first analysis step for analyzing the insulating oil inside the oil-filled electrical device before the replacement, a second analysis step for analyzing the insulating oil inside the oil-filled electrical device after the replacement, a first evaluation step for evaluating the degradation state of the oil-filled electrical device before the replacement on the basis of an analysis result obtained in the first analysis step, a second evaluation step for evaluating the degradation state of the oil-filled electrical device after the replacement on the basis of an analysis result obtained in the second analysis step, and a third evaluation step for evaluating the degradation state of the oil-filled electrical device on the basis of an evaluation result obtained in the first evaluation step and an evaluation result obtained in the second evaluation step.

Inventors:
KATO, Fukutaro (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
TOYAMA, Satoru (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
Application Number:
JP2018/016801
Publication Date:
October 31, 2019
Filing Date:
April 25, 2018
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORPORATION (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
International Classes:
G01N33/26; G01N30/04; G01N33/28; H01F27/00
Foreign References:
JP2006308515A2006-11-09
JPH04241407A1992-08-28
JP2014211368A2014-11-13
JP2016025225A2016-02-08
Other References:
TSUJI MANAMI: "Development of the methods for determination of furfural in oil by solid-phase micro extraction and GC/MS", ELECTRICAL REVIEW, vol. 637, 10 March 2017 (2017-03-10), pages 27 - 29
JEONG, JUNG-II ET AL.: "Accelerated Aging Effects of Mineral and Vegetable Transformer Oils on Medium Voltage Power Transformers", IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION, vol. 19, no. 1, 1 February 2012 (2012-02-01), pages 156 - 161, XP011447817, ISSN: 1070-9878, DOI: 10.1109/TDEI.2012.6148514
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (Nakanoshima Festival Tower West, 2-4 Nakanoshima 3-chome, Kita-ku, Osaka-sh, Osaka 05, 〒5300005, JP)
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