Research on High-Voltage Large-Capacity Modular Multilevel Converter (MMC) System

Author

Zhao, Jianfei ; Gao, Chun ; Cao, Kai ; Yang, Xingwu ; Mao, Wenzhe ; Jiang, Jianguo

Author_Institution

Key Lab. of Control of Power Transm. & Conversion, Shanghai Jiao Tong Univ., Shanghai, China

fYear

2012

Firstpage

1470

Lastpage

1474

Abstract

Modular multilevel converter (MMC) is a newly introduced topology of multilevel converter with six arms, each of which is formed by a series connection of several chopper-cells and an inductor. This paper first analyzes the topology and working principle of high-voltage large-capacity MMC. Then, a novel control strategy and its system solution are proposed and explained in details, including staircase modulation and control methods on chopper-cells, and two controls on capacitor voltage, which are average balancing and arm-balancing. Based on PSIM, a system simulation platform of 100-level megawatt MMC with 110KV is established, achieving the co-simulation of its topology and control strategy. The validity of the topology as well as the control strategy proposed in this paper is confirmed by the simulation.

Keywords

power convertors; power inductors; PSIM; arm-balancing; capacitor voltage; chopper-cells; control strategy; high-voltage large-capacity MMC system; high-voltage large-capacity research modular multilevel converter system; inductor; power 100 MW; staircase modulation; voltage 110 kV; Capacitors; Integrated circuit modeling; Modulation; Silicon; Switches; Topology; Voltage control; Multilevel converter; PSIM; SPWM; capacitor-voltage balancing;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent System Design and Engineering Application (ISDEA), 2012 Second International Conference on

Conference_Location

Sanya, Hainan

Print_ISBN

978-1-4577-2120-5

Type

conf

DOI

10.1109/ISdea.2012.402

Filename

6173486