Title:
UNINTERRUPTIBLE POWER SUPPLY SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/003332
Kind Code:
A1
Abstract:
According to the present invention, each of n uninterruptible power supply devices (10, 20), which are connected in parallel, is provided with m uninterruptible power supply modules which are connected in parallel between an input terminal and an output terminal. In each of the uninterruptible power supply modules, a control unit controls an inverter such that an alternating current value of alternating current power supplied to a load from the inverter matches a first command value. n-by-m control units are combined with each other to constitute a composite control unit. When, in any one of the n uninterruptible power supply devices, a fault of one uninterruptible power supply module is detected from among m uninterruptible power supply modules, the composite control unit makes the faulty uninterruptible power supply module be paralleled off therefrom, and changes the first command value to a second command value such that the alternating current values of the alternating current power output from the inverters are balanced with each other among the remaining normal uninterruptible power supply modules.
Inventors:
ABE SHOICHI (JP)
Application Number:
PCT/JP2017/023697
Publication Date:
January 03, 2019
Filing Date:
June 28, 2017
Export Citation:
Assignee:
TOSHIBA MITSUBISHI ELEC IND (JP)
International Classes:
H02J9/06
Foreign References:
| US20160020645A1 | 2016-01-21 | |||
| JPH05130740A | 1993-05-25 | |||
| JP2014053986A | 2014-03-20 | |||
| JP2013031325A | 2013-02-07 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
Download PDF: