A three-phase to DC converter combining controlled step-down of voltage and bi-directional power flow

Author

Rahim, N.A. ; Green, T.C. ; Williams, B.W.

Author_Institution

Heriot-Watt Univ., Edinburgh, UK

fYear

1994

fDate

26-28 Oct 1994

Firstpage

295

Lastpage

300

Abstract

A new configuration for a three-phase bi-directional power converter (AC-DC and DC-AC) is presented. The converter is operated as a step-down converter where the output voltage can be controlled in the range of 0 to 1.5 Vˆ_ph. The power switch configuration is simpler than the conventional anti-parallel bridge used for bi-directional step-down rectification. It has nine controllable switches and twelve diodes. In the rectifier and inverter mode, line current can be sinusoidally regulated with unity displacement factor. This complies with the EN standard on harmonic currents. Synchronous PWM is implemented in a field programmable gate array and regulation of the output is achieved with a PID controller. Simulation and experimental results are provided to demonstrate the effectiveness of the proposed converter system

Keywords

AC-DC power convertors; DC-AC power convertors; PWM invertors; PWM power convertors; electric current control; feedback; field programmable gate arrays; power semiconductor switches; power system harmonics; rectifying circuits; three-term control; voltage control; AC-DC; DC-AC; EN standard; PID control; controllable switches; diodes; field programmable gate array; harmonic currents; inverter; line current regulation; output voltage control; power switch; rectifier; step-down converter; synchronous PWM; three-phase bi-directional power converter; unity displacement factor;

fLanguage

English

Publisher

iet

Conference_Titel

Power Electronics and Variable-Speed Drives, 1994. Fifth International Conference on

Conference_Location

London

Type

conf

DOI

10.1049/cp:19940980

Filename

341567