ANTI-WINDUP STRATEGY FOR AN LQ CURRENT CONTROLLER WITH OSCILLATORY TERMS FOR THREE-PHASE GRID-TIE VSCs IN SMES SYSTEMS

Andrzej Gałecki; Lech Grzesiak; Barłomiej Ufnalski; Arkadiusz Kaszewski; Marek Michalczuk

doi:10.5277/ped160204

Abstract

The paper presents a linear-quadratic current controller with damped oscillatory terms designed for three-phase grid-tie voltage source converters used in SMES systems and operated under distorted grid voltage conditions. Special emphasis is placed on a synthesis of an anti-windup mechanism to prevent wind-up derived from the oscillatory terms by the use of a new active damping loop based on a simple moving average method. As a consequence, the current feedback gain may be increased without unwanted overshoot and overruns, and performance of the system can be improved.

References

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ANTI-WINDUP STRATEGY FOR AN LQ CURRENT CONTROLLER WITH OSCILLATORY TERMS FOR THREE-PHASE GRID-TIE VSCs IN SMES SYSTEMS

Abstract

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