Capacitor voltage balancing in multi-level voltage reinjection (MLVR) converters

Author

Liu, Y.H. ; Arrillaga, J. ; Watson, N.R.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Canterbury, Christchurch, New Zealand

Volume

20

Issue

2

fYear

2005

fDate

4/1/2005 12:00:00 AM

Firstpage

1728

Lastpage

1737

Abstract

In common with conventional multi-level conversion configurations, the multi-level voltage reinjection scheme uses multi-level clamping and dc series connected capacitors. The operation conditions that lead to capacitor voltage unbalance are analyzed and the use of adaptive adjustment of the clamping switches conducting periods is investigated. It is shown that in the MLVR configuration the capacitor voltage balancing problem can be eliminated without the need for extra balancing components.

Keywords

power capacitors; power convertors; switching convertors; MLVR configuration; capacitor voltage balancing; clamping switches conducting periods; dc series connected capacitors; multi-level clamping; multi-level voltage reinjection converters; voltage source converters; Bridge circuits; Capacitors; Clamps; Diodes; Pulse width modulation; Snubbers; Switches; Switching loss; Transformers; Voltage control; Capacitor voltage balancing; multi-level diode clamped-VSC; multi-level voltage reinjection (MLVR); voltage source converters (VSC);

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2004.834348

Filename

1413448