Research on control strategy for high power AC-DC-AC cascaded converter

Author

Wang Cong ; Wang Jun ; Sha Guanglin ; Yang Liang

Author_Institution

Sch. of Mech. Electron. & Inf. Eng., China Univ. of Min. & Technol., Beijing, China

fYear

2014

fDate

Aug. 31 2014-Sept. 3 2014

Firstpage

1

Lastpage

5

Abstract

The high power AC-DC-AC cascaded converter consists several fundamental power blocks. The working principles have been described to draw the rectifier/inverter stage´s non-cascaded equivalent prerequisite, as well as the global dc-link capacitors´ voltage balancing condition. Therefore, the control strategy could be designed hierarchically, such as cascaded voltage control, power factor control and voltage balancing control. The power factor at both front ends can be regulated at 1 or -1 depending on power delivery direction of the converter. The power flow alters automatically based on the given power flow. Both of simulation and experimental results verified the proposed control strategy.

Keywords

AC-DC power convertors; DC-AC power convertors; invertors; load flow; power factor; rectifiers; voltage control; cascaded voltage control; control strategy; global dc-link capacitor; high power AC-DC-AC cascaded converter; power delivery direction; power factor control; power flow; rectifier/inverter stage; voltage balancing condition; voltage balancing control; Capacitors; Educational institutions; Inverters; Load flow; Reactive power; Rectifiers; Voltage control; cascaded converter; high power; non-cascaded equivalent model; overall voltage control; predicted current control;

fLanguage

English

Publisher

ieee

Conference_Titel

Transportation Electrification Asia-Pacific (ITEC Asia-Pacific), 2014 IEEE Conference and Expo

Conference_Location

Beijing

Print_ISBN

978-1-4799-4240-4

Type

conf

DOI

10.1109/ITEC-AP.2014.6941057

Filename

6941057