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. 17, 2020
Filed:
May. 12, 2017
Mitsubishi Electric Corporation, Chiyoda-ku, JP;
Miwako Tanaka, Chiyoda-ku, JP;
Toshiyuki Fujii, Chiyoda-ku, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
In a power conversion system in which self-excitation-type power conversion devices performing bidirectional power conversion are mutually interconnected by direct current, when the power conversion device serving for power transmission is stopped, in the first power conversion device, a DC capacitor voltage control unit calculates a current amount for compensating capacitor voltage in accordance with voltage variation in a DC capacitor. A high-voltage-side DC current control unit determines that an electricity amount supplied from a power supply system to the first power conversion device is a predetermined value or higher, and subtracts the current amount for compensating the capacitor voltage from a DC current command value. Thus, while the DC voltage is kept to be constant, the power flow direction is changed and power transmission to a second DC system is continued.