Virtual Group Control Algorithm for Modular Multilevel Converter

Year 2019, Volume: 3 Issue: 1, 45 - 51, 29.03.2019

Chan-ki Kim Soo-yeon Sim Chang-hwan Park Jang-mok Kim

Abstract

This paper deals with the group control method of MMC (Modular Multilevel Converter) HVDC system. The proposed scheme increases the number of SMs (Submodules) of MMC HVDC system to more than 500 (2GW class) without changing the sampling time. This method is called Cluster Stream Buffer (CSB) method, and the total SMs are divided into several clusters, and a cluster is composed of 32 SMs. It is easy for the Cluster Stream Buffer method to expand HVDC system to several GW Class and it is easy to keeping the system performances. Consequently, this method was validated using MATAB/Simulink program.

Keywords

MMC HVDC(Modular Multilevel Converter HVDC), CSB(Cluster Stream Buffer;Level Selection Method), NLC(Nearsst Level Control), SM(Submodule)

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