Introduction of a series-connected hybrid multi-converter system

Author

Fukuda, Shoji ; Kubo, Yusuke ; Dongsheng, Li

Author_Institution

Div. of Syst. & Inf., Hokkaido Univ., Sapporo, Japan

Volume

1

fYear

2002

fDate

13-18 Oct. 2002

Firstpage

523

Abstract

This paper proposes a hybrid multi-converter system aiming at a large capacity high voltage high efficiency converter system with being free from harmonies in its input/output. The system can consist of n-1 (n: integer) GTO inverters and a single neutral-point-clamped IGBT inverter connected in series by n output transformers. The GTO converters operate in a square-wave switching mode, while the IGBT converter operates in a PWM switching mode. The former produces a base part of the resultant output voltage. The latter not only produces an additional part of the resultant output, but offsets the harmonic components generated by the GTO converters. A basic voltage control strategy for the system is proposed, and its validity is verified by experimental results.

Keywords

PWM invertors; electric current control; insulated gate bipolar transistors; switching circuits; thyristor convertors; voltage control; 1 kVA; GTO inverters; PWM switching mode; current control; harmonic components; harmonic free input/output; high voltage high efficiency converter system; neutral-point-clamped IGBT inverter; output transformers; series connection; series-connected hybrid multi-converter system; square-wave switching mode; voltage control; voltage control strategy; Circuits; Current control; Insulated gate bipolar transistors; Power harmonic filters; Pulse width modulation; Pulse width modulation converters; Pulse width modulation inverters; Switching converters; Transformers; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 2002. 37th IAS Annual Meeting. Conference Record of the

Conference_Location

Pittsburgh, PA, USA

ISSN

0197-2618

Print_ISBN

0-7803-7420-7

Type

conf

DOI

10.1109/IAS.2002.1044135

Filename

1044135