Research on VSC-HVDC based on modular multilevel converter technique

Siyu Chen; Yalou Li; Xiaobo Hu; Li Zhao; Chaoxi Chen
July 2014
Applied Mechanics & Materials;2014, Issue 577, p588
Academic Journal
This paper introduces the topology and working principle of modular multilevel converter, simplifying its equivalent circuit before obtaining virtual equipotential. On the ground of the theoretical model of equivalent circuit, MMC-HVDC could adapt the same control strategy as the traditional method. So, on the platform of PSCAD/EMTDC, an eleven level MMC Dual-infeed HVDC system is established and nearest level modulation is adopted as its control strategy to sort voltage sharing of the modules. Experimental results prove the validity of the proposed model.


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