Title:
DETECTION METHOD AND SYSTEM FOR PARTIAL DISCHARGE IN INSULATOR OF POWER APPARATUS
Document Type and Number:
Japanese Patent JP3756473
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To highly accurately and simply detect a partial discharge occurring in a power apparatus by using an ultrasonic wave.
SOLUTION: A partial discharge detection system of a power apparatus comprises: an ultrasonic sensor 10 mounted on the insulator of the power apparatus 17 for detecting the ultrasonic wave occurring during AC power supply to the power apparatus; a frequency component detecting section 18 for detecting a frequency component by subjecting the ultrasonic wave detected by the sensor 10 to frequency analysis; and a judging section 19 wherein an occurring frequency of the frequency component of the ultrasonic wave and a frequency of the AC power supplied to the apparatus, i.e., a power source frequency, are compared with each other and partial discharge is judged to have occurred if the occurring frequency of the ultrasonic wave is equal to the power source frequency or within twice the power source frequency.
Inventors:
Masahiro Oda
Fuchigami Yoshiki
Kenjiro Takeda
Takayuki Shibata
Fuchigami Yoshiki
Kenjiro Takeda
Takayuki Shibata
Application Number:
JP2002221386A
Publication Date:
March 15, 2006
Filing Date:
July 30, 2002
Export Citation:
Assignee:
JFE Advantech Co., Ltd.
THE TOKYO ELECTRIC POWER COMPANY,INCORPORATED
THE TOKYO ELECTRIC POWER COMPANY,INCORPORATED
International Classes:
G01R31/12; H02B13/065; H02G5/06; (IPC1-7): G01R31/12; H02B13/065; H02G5/06
Domestic Patent References:
| JP62194475A | ||||
| JP9127181A | ||||
| JP62076472A | ||||
| JP2002131366A |
Attorney, Agent or Firm:
Aoyama Aoi
Osamu Kawamiya
Yasumichi Furukawa
Atsushi Maeda
Yoshiyuki Maebori
Osamu Kawamiya
Yasumichi Furukawa
Atsushi Maeda
Yoshiyuki Maebori
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