Simplified control strategy to improve AC-input-current waveform of parallel-connected current-type PWM rectifiers

Author

Sato, Y. ; Kataoka, T.

Author_Institution

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

Volume

142

Issue

4

fYear

1995

fDate

7/1/1995 12:00:00 AM

Firstpage

246

Lastpage

254

Abstract

A new control method for parallel-connected current-type PWM rectifiers for high-power applications is proposed. To reduce waveform distortion and transient oscillation of the AC supply current, state-feedback control of the AC-side LC filter is introduced. A new method of generating a PWM pattern suitable for the parallel connected rectifiers is proposed to obtain sufficient controllability with a reduced switching frequency of the power devices. A method of balancing DC output currents of the component bridges is shown, and an analysis of the interbridge current is made. The effectiveness of the proposed control strategy is confirmed by experimental investigation employing a test system

Keywords

PWM power convertors; bridge circuits; controllability; electric current control; filters; rectifying circuits; state feedback; switching circuits; transients; AC supply current; AC-input-current waveform; AC-side LC filter; DC output currents balancing; control method; controllability; interbridge current; parallel-connected current-type PWM rectifiers; simplified control strategy; state-feedback control; transient oscillation; waveform distortion reduction;

fLanguage

English

Journal_Title

Electric Power Applications, IEE Proceedings -

Publisher

iet

ISSN

1350-2352

Type

jour

DOI

10.1049/ip-epa:19951809

Filename

414943