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:
Oct. 05, 2021
Filed:
Apr. 09, 2020
Industry-academic Cooperation Foundation, Yonsei University, Seoul, KR;
Kyeon Hur, Seoul, KR;
Heejin Kim, Seoul, KR;
Sangmin Kim, Seoul, KR;
Jongseo Na, Seoul, KR;
Ryangkyu Kim, Seoul, KR;
Abstract
Disclosed is a modular multilevel converter sub-module, including: a normal circuit which includes a first switching element and a second switching element connected in series and a first diode and a second diode respectively connected to be parallel to the first switching element and the second switching element to offset a counter electromotive force generated in the first switching element and the second switching element, a fault DC current blocking circuit which includes a capacitor connected to the normal circuit in parallel and applies a capacitor voltage to a DC fault path as a reverse voltage with respect to a fault voltage, and a bypass circuit which includes a third switch element, is connected to the fault DC current blocking circuit in parallel, and determines an output voltage and a direction of an arm current to provide a DC fault current bypass path when a DC fault current occurs.