Two-degree-of-freedom robust ℋ− repetitive control for grid-connected inverter

Author

Sriart, Worasak ; Boonto, Sudchai ; Naetiladdanon, S. ; Lenwari, Wanchak

Author_Institution

Dept. of Control Syst. & Instrum. Eng., King Mongkuts Univ. of Technol., Thonburi, Thailand

fYear

2014

fDate

18-20 June 2014

Firstpage

791

Lastpage

796

Abstract

This paper presents a robust control strategy for voltage controller of grid-connected inverter. The combining of feedback-feedforward control and ℋ_∞ repetitive control is introduced to improve tracking performance and reduce the period disturbance. The achieved objective is robustly regulate voltage, good dynamic and tracking response. The proposed controller is tested in simulation by MATLAB/SIMULINK. The results show that the proposed controller obtains better performance under different scenarios (stand-alone mode, grid-connected mode and grid frequency variations) than the previous work.

Keywords

H^∞ control; feedback; feedforward; invertors; robust control; voltage control; feedback-feedforward control; grid frequency variation; grid-connected inverter; grid-connected mode; period disturbance; robust ℋ_- repetitive control; stand-alone mode; tracking performance; two-degree-of-freedom control; voltage controller; Closed loop systems; Frequency control; Inverters; Power system stability; Robustness; Steady-state; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Control & Automation (ICCA), 11th IEEE International Conference on

Conference_Location

Taichung

Type

conf

DOI

10.1109/ICCA.2014.6871022

Filename

6871022