Effect of DC link capacitance on the transient response of a PWM AC-DC converter

Author

Rashid, T. ; Holliday, D. ; Grant, D.A.

Author_Institution

Ind. Electron. Group, Bristol Univ., UK

fYear

1996

fDate

23-25 Sept. 1996

Firstpage

401

Lastpage

406

Abstract

A linearised, small-signal perturbation model of a PWM AC-DC voltage source power converter under phase and amplitude control is used to investigate the effect of DC link capacitance on the transient response of the power converter. The model uses classical s-plane techniques and significantly simplifies power converter analysis. The responses to step changes in the control inputs are investigated for a variety of capacitance values. For large values of capacitance, it is possible to model the power converter as a first order system. The results obtained from the small-signal model are compared with simulation results and show excellent agreement. The small-signal model analysis is potentially a very useful tool in power converter design.

Keywords

AC-DC power convertors; PWM power convertors; capacitance; rectifying circuits; transient response; DC link capacitance; PWM AC-DC power converter; classical s-plane techniques; first order system; linearised small-signal perturbation model; step changes; step response; transient response;

fLanguage

English

Publisher

iet

Conference_Titel

Power Electronics and Variable Speed Drives, 1996. Sixth International Conference on (Conf. Publ. No. 429)

ISSN

0537-9989

Print_ISBN

0-85296-665-2

Type

conf

DOI

10.1049/cp:19960948

Filename

708389