Title:
DC POWER SUPPLY SYSTEM
Document Type and Number:
Japanese Patent JP2018033211
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To effectively utilize surplus power of a photovoltaic power generation device by securing an appropriate amount of space in a storage battery by considering the insurance of a power source at the time of a disaster or the like while reducing influence of error between estimated surplus power electric energy and actual surplus electric energy.SOLUTION: A DC power supply system including a photovoltaic power generation device, storage battery, and load comprises: a calculation unit 14 for calculating a surplus power generation amount of the photovoltaic power generation device according to a predetermined expression; a mode determination unit 15 for determining an operation mode to be adopted as charge/discharge control of the storage battery from a plurality of operation modes associated with a plurality of predetermined surplus power generation amount numerical range, depending on the calculated surplus power generation amount; and a mode execution unit 16 for executing charge/discharge control of the storage battery according to the determined operation mode. The mode execution unit 16 performs the charge/discharge control so as to secure the storage battery's SOC being equal to or higher than a predetermined level in any operation mode.SELECTED DRAWING: Figure 3
Inventors:
NAKAMURA YUKI
KIMURA KAZUAKI
TAKENO KAZUHIKO
KIMURA KAZUAKI
TAKENO KAZUHIKO
Application Number:
JP2016162734A
Publication Date:
March 01, 2018
Filing Date:
August 23, 2016
Export Citation:
Assignee:
NTT DOCOMO INC
International Classes:
H02J7/35
Attorney, Agent or Firm:
Yoshiki Hasegawa
Yoshiki Kuroki
Takashi Okiyama
Kenji Fukaishi
Yoshiki Kuroki
Takashi Okiyama
Kenji Fukaishi
Previous Patent: A cable run interrupting device and a photovoltaics supervising system
Next Patent: Electric vehicles
Next Patent: Electric vehicles