Individual Voltage Balancing Strategy for PWM Cascaded H-Bridge Converter-Based STATCOM
Barrena, J.A.
Marroyo, L.
Vidal, M.A.R.
Apraiz, J.R.T.
Mondragon Univ., Mondragon;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Jan. 2008
Volume: 55,
Issue: 1
On page(s): 21-29
ISSN: 0278-0046
INSPEC Accession Number: 9756535
Digital Object Identifier: 10.1109/TIE.2007.906127
Current Version Published: 2008-01-04
Abstract
This paper presents a new control method for cascaded connected H-bridge converter-based static compensators. These converters have classically been commutated at fundamental line frequencies, but the evolution of power semiconductors has allowed the increase of switching frequencies and power ratings of these devices, permitting the use of pulsewidth modulation techniques. This paper mainly focuses on dc-bus voltage balancing problems and proposes a new control technique (individual voltage balancing strategy), which solves these balancing problems, maintaining the delivered reactive power equally distributed among all the H-bridges of the converter.
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