Control strategy for Single-phase Transformerless Three-leg Unified Power Quality Conditioner Based on Space Vector Modulation

Yong Lu, Guochun Xiao, Xiongfei Wang, Frede Blaabjerg, Dapeng Lu

Research output: Contribution to journalJournal articleResearchpeer-review

32 Citations (Scopus)

Abstract

The unified power quality conditioner (UPQC) is known as an effective compensation device to improve PQ for sensitive end-users. This paper investigates the operation and control of a single-phase three-leg UPQC (TL-UPQC), where a novel space vector modulation method is proposed for naturally solving the coupling problem introduced by the common switching leg. The modulation method is similar to the well-known space vector modulation widely used with three-phase voltage source converters, which thus brings extra flexibility to the TL-UPQC system. Two optimized modulation modes with either reduced switching loss or harmonic distortion are derived, evaluated, and discussed, in order to demonstrate the flexibility brought by the space vector modulated TL-UPQC. Simulations and experimental results are presented to verify the feasibility and effectiveness of the proposed space vector modulation approach as well as two mentioned modulation modes.
Original languageEnglish
JournalI E E E Transactions on Power Electronics
Volume31
Issue number4
Pages (from-to)2840-2849
Number of pages10
ISSN0885-8993
DOIs
Publication statusPublished - Apr 2016

Keywords

  • Improved efficiency
  • Reduced harmonic distortion
  • Space vector modulation (SVM)
  • Unified power quality conditioner (UPQC).

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