Title:
DC PROTECTION RELAY SYSTEM
Document Type and Number:
Japanese Patent JP2017192179
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a DC protection relay system capable of preventing false detection of fault current.SOLUTION: A DC transmission system 100 for transmitting while switching a first mode using only cable as a transmission path between multiple A/D converters 11A, 11B, 12A, 12B, and a second mode using underground as a part of transmission path, has a detector 210 for detecting a fault current generated, a trip output unit 220 outputting a trip signal for stopping transmission, when the detector 210 detects a fault current, a determination unit 230 for determining that the transmission path of second mode is in a state where a fault current flows via underground, and a lock unit 240 for locking the function of the trip output unit 220, when the determination unit 230 determines that the transmission path is in a state where a fault current flows via underground.SELECTED DRAWING: Figure 1
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Inventors:
OTOMO MASARU
OKUDA MINORU
SHIAKU TAKAHIRO
MATSUDA SHINJI
ANDO MASAYUKI
KIRITANI TAKASHI
OKUDA MINORU
SHIAKU TAKAHIRO
MATSUDA SHINJI
ANDO MASAYUKI
KIRITANI TAKASHI
Application Number:
JP2016079166A
Publication Date:
October 19, 2017
Filing Date:
April 11, 2016
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
H02J1/00; H02H3/087; H02J3/36
Attorney, Agent or Firm:
Kiuchi Mitsuharu
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