Title:
POWER CONVERSION DEVICE AND CONTROL METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2018/185963
Kind Code:
A1
Abstract:
According to the present invention, a power conversion device is provided between a commercial power system and a DC power supply having a lower voltage than a peak value of an absolute value of an AC voltage of the commercial power system, and performs conversion of DC power into AC power or vice versa. The power conversion device is provided with a control unit which generates a period in which, in a half cycle of an AC, according to the phase of the AC, one among a DC/DC converter and a full-bridge circuit performs a switching operation, and the other is paused. The control unit sets, on the basis of a voltage of the AC power, a voltage change by an AC reactor, respective reactive currents flowing through an intermediate capacitor and an AC-side capacitor, and a voltage of the DC power, a current target value of the DC/DC converter to be synchronized with a current of the AC power, and uses, as a voltage of the AC power, a voltage in which a phase is compensated, in consideration of detection or a delay in a control system, to a fundamental wave that is extracted on the basis of an AC voltage detection value of the commercial power system.
Inventors:
SHIMIZU YUSUKE (JP)
AKITA TETSUO (JP)
AYAI NAOKI (JP)
AKITA TETSUO (JP)
AYAI NAOKI (JP)
Application Number:
PCT/JP2017/039366
Publication Date:
October 11, 2018
Filing Date:
October 31, 2017
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
H02M7/48; H02M7/12
Foreign References:
| JP2015149882A | 2015-08-20 | |||
| JP2011036040A | 2011-02-17 | |||
| JPH09271176A | 1997-10-14 | |||
| JPH09308263A | 1997-11-28 |
Attorney, Agent or Firm:
SUNCREST PATENT AND TRADEMARK ATTORNEYS (JP)
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