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A 3P-3W UPQC with Scott-Connected Transformer for 3P-4W Distribution System
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A 3P-3W UPQC with Scott-Connected Transformer for 3P-4W Distribution System
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Journal Article
A 3P-3W UPQC with Scott-Connected Transformer for 3P-4W Distribution System
2011
Overview
In this paper, a new topology is developed for a three-phase four-wire (3P4W) distribution system utilizing a scott-transformer supported three-legs VSIs based three-phase three-wire (3P3W) Unified Power Quality Conditioner (UPQC).In this proposed topology the neutral point of the star connected transformer, used for the connection of series active power filter (APF) of 3P3W UPQC, is utilized as a fourth wire for 3P4W distribution system. The scott-connected transformer is connected near the load to compensate the neutral current that may flow toward the neutral point of the series transformer of series APF. For the mitigation of different power quality(PQ) problems a control technique based on the combination of unit template technique(UTT) and power balance theory(PBT)is used for the control of UPQC. In this control scheme of UPQC, the current/voltage control is applied over the fundamental supply currents/voltages instead of fast changing APFs currents/voltages, there by reducing the computational delay and the required sensors. The performance of the proposed topology of UPQC is analyzed through simulations results using MATLAB software with its Simulink and Power System Block set toolboxes. [PUBLICATION ABSTRACT]
Publisher
University of Oradea
Subject
