Title :
A robust digital current control method for active power filters
Author :
Sedighy, Mohammad ; Dewan, Shashi B. ; Dawson, Francis P.
Author_Institution :
Hatch Associates, Mississauga, Ont., Canada
Abstract :
A robust digital current control strategy for active power filters using voltage-source converters is presented. The proposed control system is designed and implemented in the form of an internal model control structure and takes the presence of computational time-delay into account. As a result, it provides an effectively overshoot-free reference-to-output response. The stability of the closed-loop system has much lower sensitivity with respect to parameter uncertainties compared to the case when a conventional predictive controller is used. The experimental results obtained from a digital-signal-processor-based single-phase experimental active power filter are also reported
Keywords :
active filters; closed loop systems; control system synthesis; digital control; electric current control; power convertors; power filters; robust control; stability; active power filters; closed-loop system stability; computational time-delay; control design; control performance; internal model control structure; overshoot-free reference-to-output response; parameter uncertainties; robust digital current control method; robustness; voltage-source power converters; Active filters; Control system synthesis; Control systems; Current control; Delay; Power harmonic filters; Power system modeling; Pulse width modulation; Pulse width modulation converters; Robust control;
Journal_Title :
Industry Applications, IEEE Transactions on
