Title:
The remaining life assessment method and a remaining life assessment device of Power distribution and distribution apparatus
Document Type and Number:
Japanese Patent JP6045444
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a remaining lifetime diagnosis method and device capable of diagnosing a remaining lifetime of a solid insulator of power reception/distribution equipment accurately in an online state.SOLUTION: By using a humidity-independent surface resistivity evaluation technique, humidity-independent surface resistivity of an insulator to be diagnosed included in power reception/distribution equipment is acquired (S1). A sensor insulator formed from the same or equal material as or to the insulator to be diagnosed is installed in the power reception/distribution equipment (S2). The measured surface resistivity of the sensor insulator is successively converted into surface resistivity of the insulator to be diagnosed while using first and second conversion coefficients (S4 and S5). The first conversion coefficient corresponds to a difference of surface resistivity between the insulator to be diagnosed and the sensor insulator when installing the sensor insulator in the power reception/distribution equipment. The second conversion coefficient corresponds to a difference between a reduction speed of the surface resistivity of the insulator to be diagnosed and a reduction speed of the surface resistivity of the sensor insulator.
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Inventors:
Shinsuke Miki
Umemura Sonoko
Yuichi Yamaji
Umemura Sonoko
Yuichi Yamaji
Application Number:
JP2013125485A
Publication Date:
December 14, 2016
Filing Date:
June 14, 2013
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H02B3/00; G01M99/00; G01R27/02; G01R31/00; G01R31/02
Domestic Patent References:
| JP2012231633A | ||||
| JP2003009316A | ||||
| JP2012073207A |
Attorney, Agent or Firm:
Fukami patent office