Title :
A cascaded hybrid inverter with improved DC-link voltage control for grid connected systems
Author :
Wanjekeche, T. ; Jimoh, A.A. ; Nicolae, D.V.
Author_Institution :
Dept. of Electr. Eng., Tshwane Univ. of Technol., Tshwane, South Africa
Abstract :
This paper presents investigation of a new Phase shifted PWM technique with improved harmonic suppression. A novel balance circuit for DC - link voltage balance of two three level legs connected back - to back is designed and tested. Combined with the individual voltage control, a complete voltage controller is developed for a cascaded nine level hybrid model with two cells. Robustness of the proposed algorithm under varying operating conditions and modulation indices is verified by simulation.
Keywords :
harmonic distortion; invertors; power conversion harmonics; power grids; voltage control; DC-link voltage balance; balance circuit; cascaded hybrid inverter; cascaded nine level hybrid model; grid connected systems; improved DC-link voltage control; improved harmonic suppression; individual voltage control; phase shifted PWM technique; Capacitors; Integrated circuit modeling; Inverters; Legged locomotion; Mathematical model; Pulse width modulation; Voltage control; DC- link voltage balance; Grid connected systems; Hybrid Cascaded inverter; PWM inverter; power quality;
Conference_Titel :
Industrial Electronics (ISIE), 2012 IEEE International Symposium on
Conference_Location :
Hangzhou
Print_ISBN :
978-1-4673-0159-6
Electronic_ISBN :
2163-5137
DOI :
10.1109/ISIE.2012.6237391
