Paper Title
By using Power Electronics Transformer Based DVR to Enhance Quality of Power

Abstract
A three phase four wire Dynamic Voltage Restorer (DVR) with bidirectional power electronic transformer structure is proposed to inject required compensating series voltage to the electric power system in such a way that continuous sinusoidal voltage is seen at load side ever at heavy fault occurrences at utility side. The Proposed structure is composed of a three phase four- leg inverter, three single phase high frequency transformers, three cyclo converters and high frequency harmonic filter that are connected to the utility. Three dimensional space vector modulation (3DSVM) methods is used for pulse generation. Fourth added wire enables the DVR to compensate unbalance voltage disturbance that are customer power quality problems in electrical utility. In this paper proposed DVR performance was studied via simulation results. This simulation results validated the satisfying operation of the proposed DVR. Index terms - PET, DVR; 3DSVM; Power Quality.