Title:
MAGNETIZING INRUSH CURRENT SUPPRESSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/093100
Kind Code:
A1
Abstract:
[Problem] To achieve, in a concrete manner, suppression of magnetizing inrush electric current of a single-phase transformer by clarifying a residual magnetic flux calculation method, and to provide a magnetizing inrush current suppression device with which it is possible to calculate an instantaneous phase angle accurately even if noise and harmonics are included in a single-phase voltage, and also to determine a breaker closing operation time accurately.
[Solution] This magnetizing inrush current suppression device 30 is provided with: a transformer voltage measurement unit 1; a steady magnetic flux calculation unit 2; an effective breaking timing calculation unit 3; an effective residual magnetic flux calculation unit 4; a closing phase angle calculation unit 5; a system voltage measurement unit 6; an instantaneous phase angle calculation unit 7; a closing command output unit 8; and a breaker closing operation time calculation unit 9.
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Inventors:
KAMESAWA TOMOYUKI (JP)
KANEDA AKIYUKI (JP)
YAMAMURA SHUNICHIRO (JP)
KANEDA AKIYUKI (JP)
YAMAMURA SHUNICHIRO (JP)
Application Number:
PCT/JP2018/039013
Publication Date:
May 16, 2019
Filing Date:
October 19, 2018
Export Citation:
Assignee:
KODENSYA CO LTD (JP)
International Classes:
H01H33/59; H02H7/045
Foreign References:
| JP2013120666A | 2013-06-17 | |||
| JPH10164754A | 1998-06-19 | |||
| JPS5746416A | 1982-03-16 | |||
| JP2008160100A | 2008-07-10 | |||
| JP2006284261A | 2006-10-19 | |||
| JP2007242484A | 2007-09-20 |
Attorney, Agent or Firm:
ARIYOSHI Shuichiro et al. (JP)
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