Title:
GROUND FAULT POINT ESTIMATION DEVICE AND SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/176098
Kind Code:
A1
Abstract:
The present invention provides a device that makes it possible to estimate a ground fault point with high accuracy by aggregating signals from the power-receiving equipment of existing power consumers. A ground fault point estimation device 5 includes: an estimated zero-phase component distribution database 7 for storing an estimated zero-phase component distribution which is the distribution of a zero-phase component of the current or voltage estimated to be detected in a plurality of high-voltage consumers 10 when a ground fault occurs at any location in a power distribution system 100; and an estimation unit 6 that generates a detected zero-phase component distribution which is the distribution of the zero-phase component detected in the plurality of high-voltage consumers 10 when the ground fault occurred, compares the detected zero-phase component distribution with the estimated zero-phase component distribution database 7, and thereby estimates the location of the ground fault.
Inventors:
SATO TAKASHI (JP)
TOMOBE OSAMU (JP)
WATANABE MASAHIRO (JP)
TOMOBE OSAMU (JP)
WATANABE MASAHIRO (JP)
Application Number:
PCT/JP2023/000060
Publication Date:
September 21, 2023
Filing Date:
January 05, 2023
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
G01R31/08; H02H7/26
Foreign References:
| JPH05122829A | 1993-05-18 | |||
| JPH11178200A | 1999-07-02 | |||
| JPH0698457A | 1994-04-08 | |||
| JPH1048286A | 1998-02-20 | |||
| JP2010161865A | 2010-07-22 | |||
| JP2019030193A | 2019-02-21 | |||
| JP2007116893A | 2007-05-10 | |||
| CN109490706A | 2019-03-19 | |||
| CN111965475A | 2020-11-20 |
Attorney, Agent or Firm:
HIRAKI & ASSOCIATES (JP)
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