SCINTILLATION ESTIMATION METHOD

WIPO Patent Application WO/2013/160991

A1

[Problem] To detect tracking deterioration of an insulating object early. [Solution] An insulator (1) is an insulation support object provided inside a switch gear, and is connected to a bus bar (2). A gauge transformer (3) measures a voltage received by the insulator (1) from the bus bar (2). A gauge converter (4) measures a current that flows in a ground wire connected to a lower portion of the insulator (1). In an inspection performed periodically, when a voltage stress is applied to the insulator (1), scintillation is generated at random at a weak location of the insulator (1). At a position a specified distance away from the insulator (1), microphones (M1, M2) are installed with a specified interval therebetween, and measure acoustic signals generated by the insulator (1). Subsequently, a check is performed of whether the acoustic signals measured by the microphones (M1, M2) have a range of oscillation of at least a specified value, and whether between two acoustic signals, there is a time correlation that corresponds to the distance between the microphones (M1, M2). If there is a time correlation, it is assessed that there is a possibility that scintillation was generated in the insulator (1).

KOMOTO SHINJI (JP)

PCT/JP2012/060877

October 31, 2013

April 23, 2012

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CHUGOKU ELECTRIC POWER (JP)
KOMOTO SHINJI (JP)

G01N29/00; G01R31/12

JPH01284775A	1989-11-16
JP5083876B2	2012-11-28
JP5018385B2	2012-09-05
JPH0212073A	1990-01-17
JP5047075B2	2012-10-10
JP4319953B2	2009-08-26

SHIN'ICHI NAGATA ET AL.: "7.2kV Switch Gear Naibu Zetsuenbutsu no Rekka Hyoka", ENERGIA SOKEN REVIEW, 2011, pages 14 - 16

ISSHIKI & CO. (JP)
All international patent business corporation (JP)

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