Abstract: This paper presents a detail structure for a three phase Four-wire (3P4W) distribution system using unified Power quality conditioner (UPQC). The 3P4W system is realized from a three-phase 3-wire system. The neutral of series transformer used in the fourth wire for the 3P4W system. The neutral current that may flow toward transformer neutral point is compensated by using a four-leg voltage source inverter topology for shunt part. The series transformer neutral will be at virtual zero potential (Vn=0v) during all operating conditions. The Unified Power Quality Conditioner (UPQC) device combines a shunt active filter together with a series active filter in a back-to-back configuration, to simultaneously compensate the supply voltage and the load current. A new control strategy (unit vector template) to balance the unbalanced load currents and also presented in this paper. The control strategies are modeled using MATLAB/SIMULINK. The performance is also observed under influence of utility side disturbances.
Keywords: Active power filter (APF), four-leg voltage-source inverter (VSI) structure, three-phase four-wire (3P4W) system, p-q theory, unified power quality conditioner (UPQC).
Title: Modeling and Simulation of Three Phases 4-Wire Distribution System Utilizing Unified Power Quality Conditioner (UPQC)
Author: B.V.S.Acharyulu, P.Ganesh, K.Harish, Ch.Suresh, V.V.Ajaykumar Patnaik
International Journal of Electrical and Electronics Research
ISSN 2348-6988 (online)
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