Improved Current Control of Three-Phase Grid-Connected Inverter Systems Under the Grid Voltage Distortions

Author

Thanh-Vu Tran ; Tae-Won Chun ; Hong-Hee Lee ; Heung-Geun Kim ; Eui-Cheol Nho

Author_Institution

Dept. of Electr. Eng., Univ. of Ulsan, Ulsan, South Korea

fYear

2013

Firstpage

677

Lastpage

682

Abstract

This paper proposes the control method for reducing a total harmonic distortion (THD) of the grid current at the three-phase grid-connected inverter systems when the grid voltages are distorted. The THD of the grid current caused by grid voltage harmonics is derived by considering the phase delay and attenuation due to a hardware low-pass filter. Both the gain and angle of a compensation voltage for suppressing the harmonic currents at the minimum point of THD of the grid current are derived. The simulation and experimental results show the validity of the proposed control method.

Keywords

electric current control; harmonic distortion; harmonics suppression; invertors; low-pass filters; THD reduction; attenuation; current control; grid current; grid voltage distortions; grid voltage harmonics; hardware low-pass filter; harmonic currents suppression; phase delay; three-phase grid-connected inverter systems; total harmonic distortion reduction; Current control; Hardware; Harmonic analysis; Inverters; Power harmonic filters; Voltage control; Voltage measurement; Current control; harmonic distortion; three-phase grid-connected inverter; total harmonic distortion (THD);

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering, Energy and Electrical Drives (POWERENG), 2013 Fourth International Conference on

Conference_Location

Istanbul

ISSN

2155-5516

Type

conf

DOI

10.1109/PowerEng.2013.6635691

Filename

6635691