Space vector modulation for single-phase transformerless three-leg Unified Power Quality Conditioner

Author

Yong Lu ; Guochun Xiao ; Xuanlv Wu ; Dapeng Lu

Author_Institution

Sch. of Electr. Eng., Xi´an Jiaotong Univ., Xi´an, China

fYear

2015

fDate

15-19 March 2015

Firstpage

2859

Lastpage

2865

Abstract

Unified power quality conditioner (UPQC) is an ideal compensation device to improve power quality for sensitive end-users. In this paper, a space vector modulation method is proposed for single-phase three-leg UPQC (TL-UPQC) and one possible special switching sequence with reduced switching losses is discussed based on it. The proposed modulation method is similar to the well-known space vector modulation widely used in three-phase converters, thus brings extra flexibility to the TLUPQC system. Additionally, with the special switching sequence, at least one leg of the TL-UPQC operates at line frequency and improved system efficiency will be obtained. Analysis, along with simulation and experimental results are presented to verify the feasibility and effectiveness of the proposed space vector modulation and switching sequence.

Keywords

power supply quality; switching convertors; TL-UPQC system; compensation device; single-phase transformerless three-leg unified power quality conditioner; space vector modulation method; switching loss sequence; three-phase converter; Couplings; Modulation; Shunts (electrical); Support vector machines; Switches; Voltage control; Operation efficiency; Power quality; Space vector modulation; Unified power quality conditioner;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2015 IEEE

Conference_Location

Charlotte, NC

Type

conf

DOI

10.1109/APEC.2015.7104756

Filename

7104756