Title:
DC POWER SUPPLY SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/009040
Kind Code:
A1
Abstract:
According to the present invention, a plurality of DC power sources connected to a DC bus are operated according to priorities. A wind power generating device 10 is a first DC power source. The first DC power source has the highest priority and outputs a DC voltage to a DC bus 100. A hydraulic power generating device 20, a geothermal power generating device 30, a solar power generating device 40 and a grid interconnection device 70 are second DC power sources. The upper limits of output voltages are respectively fixed for the second DC power sources according to priorities. Each of the second DC power sources outputs a DC voltage to the DC bus 100 when the voltage of the DC bus 100 is lower than the upper limit of the output voltage. The hydraulic power generating device 20 and the geothermal power generating device 30 each outputs a DC voltage when the voltage of the DC bus 100 is, for example, 290 V or less. The solar power generating device 40 outputs a DC voltage when the voltage of the DC bus 100 is, for example, 280 V or less. The grid interconnection device 70 outputs a DC voltage when the voltage of the DC bus 100 is, for example, 260 V or less.
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Inventors:
HANEDA MASAJI (JP)
MATUNAGA YASUHIRO (JP)
MATUNAGA YASUHIRO (JP)
Application Number:
PCT/JP2018/022774
Publication Date:
January 10, 2019
Filing Date:
June 14, 2018
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
H02J1/12; H02J7/34
Foreign References:
| JP2015220889A | 2015-12-07 | |||
| JP2011097818A | 2011-05-12 | |||
| JP2016181976A | 2016-10-13 | |||
| JP2005228639A | 2005-08-25 |
Attorney, Agent or Firm:
KOJIMA Takiro (JP)
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