Improvement of the output voltage waveform technology for single-phase inverter

Author

Yinyin, Xie ; Xuejun, Pei ; Hongliang, Wang ; Yong, Kang ; Yu, Chen ; Songsong, Nie

Author_Institution

Coll. of Electr. & Electron. Eng., Huazhong Univ. of Sci. & Technol., Wuhan, China

Volume

3

fYear

2009

fDate

19-20 Dec. 2009

Firstpage

340

Lastpage

343

Abstract

In this paper, to achieve high-precision steady state waveform and fast dynamic performance, a new control method is introduced, namely, a two-tier structure, the traditional digital PID controller and repetitive controller working in parallel. We name it as hybrid controller. Response speed between the two kinds of control methods is different and the time is decoupled. This control method can restrain the change of output voltage caused by load disturbance. In addition, to improve dynamic performance, two kinds of methods to improve dynamic response are proposed. One is load current feed-forward control; the other is to change the modulation ratio. Both of them improved the output voltage waveform. Finally, the proposed methods are verified by simulation and experiment.

Keywords

electric current control; invertors; load regulation; power system control; three-term control; digital PID controller; hybrid controller; load current feed-forward control; output voltage waveform technology; repetitive controller; single-phase inverter; two-tier structure; Control systems; Feedforward systems; Intelligent transportation systems; Inverters; Power supplies; Power system dynamics; Regulators; Steady-state; Three-term control; Voltage control; Dynamic Response; Feed-forward; Hybrid Controller; Modulation Ratio; PID; Repetitive Control; Steady state;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Intelligent Transportation System (PEITS), 2009 2nd International Conference on

Conference_Location

Shenzhen

Print_ISBN

978-1-4244-4544-8

Type

conf

DOI

10.1109/PEITS.2009.5406873

Filename

5406873