Title:
UNINTERRUPTABLE POWER SUPPLY DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/221053
Kind Code:
A1
Abstract:
Provided is an uninterruptable power supply device capable of responding to a variety of system abnormalities other than frequency fluctuation and voltage drop including instantaneous voltage drop. An uninterruptable power supply device 100, which is provided between a commercial power system 10 and an essential service 30 and which provides AC power to the essential service 30, wherein the uninterruptable power supply device 100 is provided with: a power supply unit 2, which has a power converter 22 and a storage battery 21 and which is connected to a power line L1 for supplying power from the commercial power system 10 to the essential service 30; an open switch 3 for opening the power supply line L1, the open switch 3 being provided on the power line L1 on the commercial power system side of the power supply unit 2; a system abnormality detection unit 5 for detecting a system abnormality, which is at least one of voltage rise, phase fluctuation, voltage imbalance, harmonic abnormality, and flicker, in addition to at least one of frequency fluctuation and voltage drop including instantaneous voltage drop, occurring on the commercial power system side of the open switch 3; and a control unit 6 which, when the detected system abnormality is equal to or greater than the tolerance of the essential service 30 or the power supply unit 2 against system abnormalities, opens the open switch 3 and supplies AC power from the power supply unit 2 to the essential service 30.
Inventors:
NISHIMURA SHOJI (JP)
KAWASAKI YOSHINORI (JP)
UDA SATOSHI (JP)
KAWASAKI YOSHINORI (JP)
UDA SATOSHI (JP)
Application Number:
PCT/JP2019/018913
Publication Date:
November 21, 2019
Filing Date:
May 13, 2019
Export Citation:
Assignee:
NISSIN ELECTRIC CO LTD (JP)
International Classes:
H02J9/06; H02J3/01; H02J3/24; H02J3/26; H02J3/32
Domestic Patent References:
| WO2005041384A1 | 2005-05-06 |
Foreign References:
| JP2000278882A | 2000-10-06 | |||
| JPH11252826A | 1999-09-17 | |||
| JP2005229662A | 2005-08-25 |
Other References:
See also references of EP 3796514A4
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