Multi-functional distributed generation unit for power quality enhancement

Author

Zheng Zeng ; Huan Yang ; Guerrero, Josep M. ; Rongxiang Zhao

Author_Institution

State Key Lab. of Power Transm. Equip. & Syst. Security & New Technol., Chongqing Univ., Chongqing, China

Volume

8

Issue

3

fYear

2015

fDate

3 2015

Firstpage

467

Lastpage

476

Abstract

A multi-functional distributed generation unit (MFDGU) and its control strategy are proposed in this study for the purpose of enhancing power quality in low-voltage networks. By using the 3H-bridge converter structure, an MFDGU can be applied in 3-phase 4-wire low-voltage distribution networks to compensate harmonic, reactive and unbalanced currents. A reduced-order model of the MFDGU is derived through a weighted-average-current-feedback approach, showing the robustness and stability of the proposed approach. The Fryze-Buchholz-Dpenbrock power theory is employed to generate the current reference of the MFDGU, which can be easily implemented in three-phase networks. A 15 kVA prototype consisting of three full bridge converters has been built and tested. Experimental results show the feasibility of the proposed topology and control strategy.

Keywords

distributed power generation; feedback; power convertors; power distribution control; power supply quality; power system harmonics; power system stability; reduced order systems; 3-phase 4-wire low-voltage distribution network; 3H-bridge converter structure; Fryze-Buchholz-Dpenbrock power theory; MFDGU; apparent power 15 kVA; current reference generate; harmonic compensation; low-voltage network; multifunctional distributed generation unit; power quality enhancement; reactive current; reduced-order model; stability; three full bridge converter; unbalanced current; weighted-average-current-feedback approach;

fLanguage

English

Journal_Title

Power Electronics, IET

Publisher

iet

ISSN

1755-4535

Type

jour

DOI

10.1049/iet-pel.2013.0954

Filename

7062094