Fuzzy Based Multiloop Controller for DVR in Distribution System

The Dynamic Voltage Restorer (DVR) is one of the custom power device used in distribution systems to protect from sudden disturbances in load voltage amplitude at the consumers side. In this paper the emergency control in distribution systems with fuzzy approach is proposed for DVR control strategy. Also, the multiloop controllers are posicast; P+Resonant controller and the fuzzy controller are used in order to improve the transient response and to eliminate the steady state error in DVR. The proposed controller's circuit is applied to some disturbances in load voltage caused by induction motor and 3-phase short circuit faults. The fuzzy, posicast and PR controllers are proposed and they are designed in MATLAB and the results are shown.