Power Quality Improvement of Wind Energy Conversion System Using Unified Power Quality Conditioner

This paper presents a comparison between Unified Power Quality Conditioner UPQC controller and normal power converter to be used for DFIG control system. Implementation of unified power quality conditioner (UPQC) in wind energy conversion system (WECS) more performance improvement is observed than the normal power converter system. This work deals with two types of UPQC models which is developed for checking its control strategy validity in wind energy conversion system based Double fed induction generator (DFIG) since UPQC has the same structure of the DFIG converters . This paper mainly focuses on efficient control system of unified power quality conditioner that makes it possible to reduce the voltage fluctuations like sag and swell conditions, as well as current and voltage harmonics mitigation in wind energy conversion system. The UPQC which can be used at the PCC for improving power quality is modeled and simulated using proposed control technique and the performance is compared by applying it to a wind energy conversion system with UPQC and with normal power converter. With the help of MATLAB/SIMULINK environment Dynamic models of the DFIG and UPQC are developed.