The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 26, 2024
Filed:
Oct. 06, 2021
Applicant:
Hitachi, Ltd., Tokyo, JP;
Inventors:
Ryo Wakabayashi, Tokyo, JP;
Toru Kouno, Tokyo, JP;
Satoru Akiyama, Tokyo, JP;
Emha Bayu Miftahullatif, Tokyo, JP;
Katsutoshi Kondo, Tokyo, JP;
Assignee:
HITACHI, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02J 3/38 (2006.01); H02J 3/32 (2006.01);
U.S. Cl.
CPC ...
H02J 3/381 (2013.01); H02J 3/32 (2013.01); H02J 2300/24 (2020.01);
Abstract
An object of the invention is to provide a control technique capable of connecting a storage battery to a DC bus via a DC/DC converter and controlling charging and discharging of the storage battery by the DC/DC converter. A DC grid system according to the invention calculates a voltage command value of a DC bus using a present voltage of a storage battery and a target voltage of the storage battery, and provides the voltage command value as a command value for each of an AC/DC converter and a DC/DC converter (see FIG.).