Title :
A Novel Structure for Three-Phase Four-Wire Distribution System Utilizing Unified Power Quality Conditioner (UPQC)
Author :
Khadkikar, Vinod ; Chandra, Ambrish
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Western Ontario, London, ON, Canada
Abstract :
This paper presents a novel structure for a three-phase four-wire (3P4W) distribution system utilizing unified power quality conditioner (UPQC). The 3P4W system is realized from a three-phase three-wire system where the neutral of series transformer used in series part UPQC is considered as the fourth wire for the 3P4W system. A new control strategy to balance the unbalanced load currents is also presented in this paper. The neutral current that may flow toward transformer neutral point is compensated by using a four-leg voltage source inverter topology for shunt part. Thus, the series transformer neutral will be at virtual zero potential during all operating conditions. The simulation results based on MATLAB/Simulink are presented to show the effectiveness of the proposed UPQC-based 3P4W distribution system.
Keywords :
active filters; distribution networks; invertors; power filters; power supply quality; active power filters; distribution system; series transformer; unbalanced load currents; unified power quality conditioner; voltage source inverters; Conductors; Inverters; MATLAB; Modeling; Power generation; Power harmonic filters; Power quality; Power system harmonics; Topology; Wire; Active power filter (APF); four-leg voltage-source inverter (VSI) structure; three-phase four-wire (3P4W) system; unified power quality conditioner (UPQC);
Journal_Title :
Industry Applications, IEEE Transactions on
DOI :
10.1109/TIA.2009.2027147
