Analysis and Proposal of Capacitor Voltage Control for an Asymmetric Cascaded Inverter

Author

Silva, L.A. ; Pimentel, S.P. ; Pomilio, J.A.

Author_Institution

Campinas State Univ.

fYear

2005

fDate

16-16 June 2005

Firstpage

809

Lastpage

815

Abstract

This work presents an analysis of the distribution of power handled by H-bridge cells of asymmetric cascaded multilevel converter. Applications of such converters require DC sources connected to DC link in order to establish constant voltage. The voltage must be independent of the modulation index and the load current. Even in applications like for SVAR compensation, where the inverter does not need to provide active power, the DC voltage must be present. The proposed control algorithm eliminates the need of additional isolated DC sources. The control strategy regulates the DC link voltages of capacitors connected to the two smallest voltages of a tree cells cascaded H-bridge inverter. Experimental results validate the voltage control strategy

Keywords

bridge circuits; cascade networks; invertors; power capacitors; power convertors; power distribution; voltage control; H-bridge inverter; active power; asymmetric cascaded inverter; asymmetric cascaded multilevel converter; capacitor voltage control; modulation index; power distribution; Capacitors; Circuit topology; Proposals; Pulse width modulation; Pulse width modulation inverters; Space vector pulse width modulation; Support vector machines; Switches; Switching converters; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 2005. PESC '05. IEEE 36th

Conference_Location

Recife

Print_ISBN

0-7803-9033-4

Type

conf

DOI

10.1109/PESC.2005.1581720

Filename

1581720