Title :
A Novel Voltage Balance Control Strategy of AC-DC-AC Converter
Author :
Yang, Zhang ; Zhong-dong, Yin ; Tao, Huang ; Qiu, Hong
Author_Institution :
Key Lab. of Power Syst. Protection & Dynamic Security Monitoring & Control, North China Electr. Power Univ. Beijing, Beijing, China
Abstract :
A general problem in the double PWM converter is the voltage unbalance of the dc-link capacitors. This unbalance distorts the waveforms of the output voltage and current. Furthermore, it will lead to instability of the inverter system. Based on the analysis for the unbalance problem, a novel feedback control strategy of DC capacitor voltage deviation is proposed in this paper. The method does not add extra circuit. Build an simulation model of AC-DC-AC converter, the results show that control strategy is correct.
Keywords :
AC-DC power convertors; PWM power convertors; power capacitors; voltage control; AC-DC-AC converter; DC capacitor voltage deviation; dc-link capacitors; double PWM converter; feedback control strategy; voltage balance control; Analog-digital conversion; Capacitors; Circuits; Control systems; Current control; Pulse width modulation; Pulse width modulation converters; Pulse width modulation inverters; Rectifiers; Voltage control; AC-DC-AC; double PWM; volatge banlance;
Conference_Titel :
Energy and Environment Technology, 2009. ICEET '09. International Conference on
Conference_Location :
Guilin, Guangxi
Print_ISBN :
978-0-7695-3819-8
DOI :
10.1109/ICEET.2009.247
