A UPQC controller design based on SMVSC

To achieve the coordination control of voltage and current compensation with excellent system robust, a unified power quality conditioner (UPQC) controller design procedures based on sliding mode variable structure control (SMVSC) is proposed. First, making use of high self-adaptability and strong robustness of SMVSC, linearization and decoupling control of dynamic model for UPQC could be achieved by proper nonlinear coordinate transformation and state feedback. Secondly, according to the difference between voltage and current compensation unit, different dynamic inversion management are adopted. And then, different sliding mode surfaces are select to design corresponding sliding controller. Finally, both simulation and prototype test results shows that the developed controller has excellent static and dynamic performance and the method proposed is effective and feasible.