Applying PWM to control overcurrents at unbalanced faults of forced-commutated VSCs used as static VAr compensators

Author

Jiang, Y. ; Ekstrom, Å

Author_Institution

Dept. of Electr. Eng., R. Inst. of Technol., Stockholm, Sweden

Volume

12

Issue

1

fYear

1997

fDate

1/1/1997 12:00:00 AM

Firstpage

273

Lastpage

278

Abstract

This study is devoted to investigating the possibility of controlling the overcurrent of a forced-commutated voltage source converter (VSC) by PWM when the AC system is undergoing large unbalanced disturbance. The converter is supposed to be used as a static VAr compensator at a high power level. A novel control strategy is proposed for controlling the reactive current and the DC side voltage independently. Digital simulation results are presented and compared with the results by using just the reactive current control with fundamental switching frequency

Keywords

PWM power convertors; commutation; electric current control; electrical faults; static VAr compensators; voltage control; AC system; DC side voltage control; PWM; digital simulation; forced-commutated voltage source converter; fundamental switching frequency; overcurrents control; reactive current control; static VAr compensators; unbalanced disturbance; unbalanced faults; Control systems; Current control; Digital simulation; Force control; Power conversion; Pulse width modulation; Pulse width modulation converters; Static VAr compensators; Static power converters; Voltage control;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.568250

Filename

568250