Design and experiment of a back-to-back (BTB) system using modular multilevel cascade converters for power distribution systems

Author

Khamphakdi, Pracha ; Sekiguchi, Kazuma ; Hagiwara, Manabu ; Akagi, Hirofumi

Author_Institution

Dept. of Electr. & Electron. Eng., Tokyo Inst. of Technol., Tokyo, Japan

fYear

2013

fDate

3-6 June 2013

Firstpage

311

Lastpage

317

Abstract

This paper presents an application of the modular multilevel cascade converter based on double-star chopper-cells (MMCC-DSCC) to a back-to-back (BTB) system for installation on 6.6-kV power distribution systems. The DSCC is characterized by a cascade connection of multiple chopper-cells per leg, leading to flexible circuit design, low voltage steps, low EMI emission, and low harmonic voltage and current. The DSCC-based BTB system is equipped with neither dc capacitor nor voltage sensor on the common dc link. The paper designs, constructs, and tests a three-phase, 200-V, and 10-kW downscaled system to verify and justify its operating principles and performance. Experimental and simulated results agree well with each other, showing a promising possibility of the DSCC-based BTB system.

Keywords

power convertors; power distribution; BTB system; MMCC-DSCC; back-to-back system; cascade connection; common dc link; double-star chopper-cells; flexible circuit design; low EMI emission; low harmonic current; low harmonic voltage; low voltage steps; modular multilevel cascade converters; multiple chopper-cells; operating principles; power 10 kW; power distribution systems; three-phase downscaled system; voltage 200 V; voltage 6.6 kV; HVDC transmission; Back-to-back systems; grid-connected converters; modular multilevel cascade converters (MMCC);

fLanguage

English

Publisher

ieee

Conference_Titel

ECCE Asia Downunder (ECCE Asia), 2013 IEEE

Conference_Location

Melbourne, VIC

Print_ISBN

978-1-4799-0483-9

Type

conf

DOI

10.1109/ECCE-Asia.2013.6579114

Filename

6579114