Title:
直流電源設備の短絡電流遮断装置
Document Type and Number:
Japanese Patent JP7159236
Kind Code:
B2
Abstract:
To realize a short circuit current cutoff device of a DC power supply facility, capable of removing a short circuit accident by surely blocking a short circuit current even if the short circuit current is increased with an increase of a power storage capacity.SOLUTION: A short circuit current cutoff device of a DC power supply facility, comprises: a charger side disconnector 111 arranged between a charger 102 and a DC power supply bus bar 103 connected to an AC power supply 101; power supply side disconnectors 109 and 110 arranged between power storages 104a and 104b and the DC power supply bus bar 103; a bus bar disconnector 112 arranged between a DC power supply load and the DC power supply bus bar 103; and detectors 105, 106, 107, and 108, detecting a voltage and a current of the DC power supply bus bar 103. In addition, the short circuit current cutoff device of the DC power supply facility, comprises a determination circuit 200 that calculates a circuit impedance from the voltage and the current detected by each of the detectors 105 to 108, and blocks the charger side disconnector 111 and the power supply side disconnectors 109 and 110 by determining the calculated circuit impedance.SELECTED DRAWING: Figure 1
Inventors:
Yuji Hosokawa
Fukuda Yuji
Fukuda Yuji
Application Number:
JP2020029137A
Publication Date:
October 24, 2022
Filing Date:
February 25, 2020
Export Citation:
Assignee:
Hitachi ge Nuclear Energy Co., Ltd.
International Classes:
H01H33/59; H02H3/087
Domestic Patent References:
| JP2005227017A | ||||
| JP10111395A | ||||
| JP2018506942A | ||||
| JP879983A |
Attorney, Agent or Firm:
Patent Attorney Corporation Kaichi