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http://dx.doi.org/10.6113/TKPE.2015.20.5.448

An Algorithm for Even Distribution of Loss, Switching Frequency, Power of Model Predictive Control Based Cascaded H-bridge Multilevel Converter  

Kim, I-Gim (LG Innotek)
Kwak, Sang-Shin (School of Electrical & Electronics Eng., Chung-Ang Univ.)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.20, no.5, 2015 , pp. 448-455 More about this Journal
Abstract
A model predictive control (MPC) method without individual PWM has been recently researched to simplify and improve the control flexibility of a multilevel inverter. However, the input power of each H-bridge cell and the switching frequency of switching devices are unbalanced because of the use of a restricted switching state in the MPC method. This paper proposes a control method for balancing the switching patterns and cell power supplied from each isolated dc source of a cascaded H-bridge inverter. The supplied dc power from isolated dc sources of each H-bridge cells is balanced with the proposed cell balancing method. In addition, the switching frequency of each switching device of the CHB inverter becomes equal. A simulation and experimental results are presented with nine-level and five-level three-phase CHB inverter to validate the proposed balancing method.
Keywords
Multilevel inverter; Cascaded H-bridge inverter; Model predictive control; Cell balancing method; Switching pattern balancing;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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