Title:
DC FEEDING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/145997
Kind Code:
A1
Abstract:
The present invention reduces variation in the lives of a plurality of storage batteries. This DC feeding system is provided with: power conditioners 4a, 4b for supplying the generated powers W1, W2 of power generation devices 3a, 3b to a DC bus 2; converters 5a, 5b for performing voltage conversion on a bus voltage Vbs and supplying load powers WLa, WLb to load devices 71a, 71b; bidirectional converters 141-14n that perform charging operation for charging storage batteries 111-11n and perform discharging operation for discharging the storage batteries 11; and a power management device 9 for instructing the converters 14 to perform the charging operation when the generated powers exceed the load powers and for instructing the converters 14 to perform the discharging operation when the generated powers become less than the load powers. The power management device 9 imparts a first voltage-current characteristic to each of the converters 14 with a slope in accordance with the SOC of each of the storage batteries 11 during the charging operation, and imparts a second voltage-current characteristic to each of the converters 14 with a slope in accordance with the SOC during the discharging operation, said first voltage-current characteristic being used for increasing charging current in a linear function manner with the increase of the bus voltage Vbs, said second voltage-current characteristic being used for decreasing discharging current in a linear function manner with the increase of the bus voltage Vbs.
Inventors:
SUZUKI SHINGO (JP)
NAOI KATSUO (JP)
MITSUNAGA TAKUMA (JP)
NAOI KATSUO (JP)
MITSUNAGA TAKUMA (JP)
Application Number:
PCT/JP2018/001973
Publication Date:
August 01, 2019
Filing Date:
January 23, 2018
Export Citation:
Assignee:
TDK CORP (JP)
International Classes:
H02J1/00
Domestic Patent References:
| WO2016170811A1 | 2016-10-27 |
Foreign References:
| JP2014207790A | 2014-10-30 | |||
| JP2005224009A | 2005-08-18 |
Attorney, Agent or Firm:
SAKAI Shinji (JP)
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