Title :
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.
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;
Conference_Titel :
Power Electronics Specialists Conference, 2005. PESC '05. IEEE 36th
Conference_Location :
Recife
Print_ISBN :
0-7803-9033-4
DOI :
10.1109/PESC.2005.1581720
