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Control strategy of a cross-phase-connected unified power quality conditioner

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4 Author(s)
Li, G.J. ; Key Lab. of Control of Power Transm. & Transformation, Minist. of Educ., Dept. of Electr. Eng., Shanghai Jiao Tong Univ., Shanghai, China ; Ma, F. ; Choi, S.S. ; Zhang, X.P.

A three-phase unified power quality conditioner (UPQC) with cross-phase connection is investigated. The UPQC is designed to mitigate voltage sags/swells, including those resulting from single-phase faults. Based on an analysis of the configuration of the conditioner, multi-loop control schemes are proposed for the voltage and current compensation strategies. The practicability of the topology and the effectiveness of the control schemes are verified through simulations using PSCAD/EMTDC. The results demonstrate the proposed control strategy for the cross-phase-connected UPQC is capable of regulating load terminal voltage and compensating load current changes simultaneously and effectively.

Published in:

Power Electronics, IET  (Volume:5 ,  Issue: 5 )