Other

Hyosung Heavy Industries Corporation

Kim, Hee Jin

Hur, Kyeon

Jong Seo Na

Sang Min Kim

Hee Jin Kim

Kyeon Hur

Jae Sik Kang

Dong Su Lee

Ju Yong Jung

A modular multilevel converter (MMC) includes multiple converter arms, each converter arm having: N submodules connected to each other in series, N being an integer equal to or greater than 2; and a circuit opening unit connected to the N submodules in series to open a circuit of the converter arm, wherein the N submodules has n submodules including full-bridge circuits and N&#x2212;n submodules including half-bridge circuits, n being less than N.

Modular multi-level converter and DC failure blocking method therefor

The present invention relates to an MMC converter system which can quickly cut off fault current by installing a plurality of disconnecting switch units on a line connected between two MMC converter devices. The MMC converter system comprises: a first MMC converter device including a plurality of serially connected sub modules; a second MMC converter device including a plurality of serially connected sub modules; a first disconnecting switch unit installed on a line between the first and second MMC converter devices; and a second disconnecting switch unit connected in series to the first disconnecting switch unit on the line, wherein each of the first and second disconnecting switch units comprises a mechanical switch installed on the line so as to open and close the line and a diode connected in parallel to the mechanical switch, and the two diodes are installed in opposite directions to each other.

Modular multilevel converter system

Growing community of inventors

Seoul, South Korea

Jong Seo Na