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1. (WO2018221906) MMC CONVERTER AND SUB-MODULE THEREOF

Pub. No.:    WO/2018/221906    International Application No.:    PCT/KR2018/006018
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Tue May 29 01:59:59 CEST 2018
IPC: H02M 7/483
H02J 3/36
Applicants: HYOSUNG HEAVY INDUSTRIES CORPORATION
효성중공업 주식회사
Inventors: OH, Sung Min
오성민
HONG, Jung Won
홍정원
LEE, Jun Chol
이준철
JUNG, Hong Ju
정홍주
LEE, Joo Yeon
이주연
Title: MMC CONVERTER AND SUB-MODULE THEREOF
Abstract:
The present invention relates to: an MMC converter linking with a high voltage direct current (HVDC) transmission system; and a sub-module constituting the same. The sub-module according to the present invention comprises: a first power semiconductor switch and a second power semiconductor switch, which respectively comprise a semiconductor switch and a diode connected in reverse-parallel to the semiconductor switch and are serially connected to each other in the same direction; a capacitor connected in parallel to both of the first power semiconductor switch and the second power semiconductor switch, which are serially connected to each other; a first terminal connected to a first node between the first and second power semiconductor switches; a second terminal connected to a second node between the second power semiconductor switch and the capacitor; a third power semiconductor switch and a fourth power semiconductor switch, which respectively comprise a semiconductor switch and a diode connected in reverse-parallel to the semiconductor switch and are serially connected to each other in opposite directions between the first terminal and the second terminal; and a third terminal connected to a third node between the third and fourth power semiconductor switches.