Modulated model based predictive control with switcher of redundant states for a three-phase cascade H-bridge multilevel STATCOM
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Show full item recordDate of publishing
2018Type of publication
research articleSubject(s)
CASCADE H-BRIDGE CONVERTER
FIXED SWITCHING FREQUENCY
MODEL PREDICTIVE CONTROL
SWITCHER OF REDUNDANT STATES
FIXED SWITCHING FREQUENCY
MODEL PREDICTIVE CONTROL
SWITCHER OF REDUNDANT STATES
Abstract
Due to problems caused by variable switching frequency a modulated model based predictive control was proposed for different topologies and their applications. However, for cascade H-bridge multilevel converters, there is another problem, the imbalance in the dc-link voltages. This paper proposes extend the modulated model based predictive control to a cascade H-bridge 7-level STATCOM, further including a switcher of redundant states to solve the imbalance voltage issue. Simulation results show improvements in terms of mean squared error, total harmonic distortion and balance voltages in the dc-links.