Direct current control and experiment of a novel 9-level modular multilevel converter

Author

Jafri, K. ; Chen, B.C. ; Yaojun Chen ; Song Zhong You

Author_Institution

High Voltage & Insulation Technol. Inst., Wuhan Univ., Wuhan, China

fYear

2012

fDate

7-9 Dec. 2012

Firstpage

1

Lastpage

6

Abstract

In this paper, the topology of a transformer less STATCOM based on a novel modular multilevel converter (M2C) viz. MSTATCOM is described. Using its single-phase equivalent circuit, the detailed mathematical analysis of the M2C is presented. Based on analysis of the structural characteristics and operating principles of M2C direct current control method (DCCM) is adopted to modify the traditional capacitor voltage balance strategy. The modulation that also performs the capacitors´ voltage balance is not deeply studied in this paper. Simulation results of 10 kV, 15-level MSTATCOM are discussed. The viability of the M2C as well as the effectiveness of the voltage-balancing control is confirmed by experiment.

Keywords

AC machines; DC machines; electric current control; equivalent circuits; mathematical analysis; network topology; static VAr compensators; voltage control; 9-level modular multilevel converter; DCCM; M2C direct current control method; MSTATCOM; capacitor voltage balance strategy; mathematical analysis; single-phase equivalent circuit; structural characteristics; transformerless STATCOM topology; voltage 10 kV; voltage-balancing control; M-STATCOM; direct current control strategy; experiment with DSP+FPGA; modular multilevel converter(M2C);

fLanguage

English

Publisher

iet

Conference_Titel

Information Science and Control Engineering 2012 (ICISCE 2012), IET International Conference on

Conference_Location

Shenzhen

Electronic_ISBN

978-1-84919-641-3

Type

conf

DOI

10.1049/cp.2012.2395

Filename

6755774