Unified Power Quality conditioner (UPQC) control using feed forward (FF)/ feed back (FB) controller

This paper presents the new control design or the unified power quality (PQ) conditioner (UPQC) for Power Quality improvement. The purpose of UPQC is to compensate for voltage sags/swells, load demand changes, power factor correction etc,. The control strategy employs a kalman filter to estimate the fundamental component as well as the harmonic components of the voltage and current. Simulation of the proposed method was carried out on a single- phase power distribution system and the results of simulation shows that the proposed method is able to provide the desirable power quality in the presence of a wide range of disturbances.