Title :
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
fDate :
1/1/1997 12:00:00 AM
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;
Journal_Title :
Power Delivery, IEEE Transactions on
