Title :
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
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;
Conference_Titel :
Power Electronics and Intelligent Transportation System (PEITS), 2009 2nd International Conference on
Conference_Location :
Shenzhen
Print_ISBN :
978-1-4244-4544-8
DOI :
10.1109/PEITS.2009.5406873
