Three-Phase Four-Wire Distribution System Utilizing Unified Power Quality Conditioner
Sahar Aslanzadeh1, Morteza Nasooti2
1Sahar Aslanzadeh, Department of Electrical Engineering, Pardis Branch, Islamic Azad University, Tehran Iran.
2Morteza Nasooti, Department of Electrical Engineering, Pardis Branch, Islamic Azad University, Tehran Iran.
Manuscript received on 10 December 2014 | Revised Manuscript received on 20 December 2014 | Manuscript Published on 30 December 2014 | PP: 83-89 | Volume-4 Issue-7, December 2014 | Retrieval Number: B1726074214/14©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: This paper presents a novel structure for a threephase 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 Power Filter (APF), Four-Leg Voltage-Source Inverter (VSI) Structure, Three-Phase Four-Wire (3P4W) System, Unified Power Quality Conditioner (UPQC).
Scope of the Article: Software & System Quality of Service