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

Volume

2

fYear

2009

fDate

16-18 Oct. 2009

Firstpage

44

Lastpage

46

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy and Environment Technology, 2009. ICEET '09. International Conference on

Conference_Location

Guilin, Guangxi

Print_ISBN

978-0-7695-3819-8

Type

conf

DOI

10.1109/ICEET.2009.247

Filename

5365548