Digital control of a three-phase four-leg inverter under unbalanced voltage conditions

Author

Vechiu, I. ; Curea, O. ; Camblong, H. ; Ceballos, S. ; Villate, J.L.

Author_Institution

LIPSI-ESTIA, Bidart

fYear

2007

fDate

2-5 Sept. 2007

Firstpage

1

Lastpage

10

Abstract

In this paper, the implementation of an innovative inverter control strategy based on the symmetrical components is presented. Symmetrical components of the inverter output voltage and current are decomposed into dq DC quantities to control a three-phase four-leg inverter. This kind of inverter can be a good choice for the applications with hybrid power system based on renewable energy used to supply unbalanced loads. The addition of a fourth leg provides an extra degree of freedom, making possible to handle the neutral current caused by the unbalanced load. Simulation results are compared with experimental results for a prototype inverter to verify the validity of the proposed control strategy.

Keywords

digital control; electric current control; hybrid power systems; invertors; voltage control; current regulation; digital control; hybrid power system; renewable energy; symmetrical components; three-phase four-leg inverter; unbalanced loads; unbalanced voltage condition; voltage regulation; Control systems; Digital control; Inverters; Leg; Power generation; Renewable energy resources; Solar power generation; Virtual colonoscopy; Voltage control; Wind energy generation; Converters control; Current control; Hybrid power integration; Power Quality; Renewable energy systems; Symmetrical Components; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Applications, 2007 European Conference on

Conference_Location

Aalborg

Print_ISBN

978-92-75815-10-8

Electronic_ISBN

978-92-75815-10-8

Type

conf

DOI

10.1109/EPE.2007.4417447

Filename

4417447