Título
DC-link Voltage Balancing Strategy based on SVM and Reactive Power Exchange for a 5L-MPC Back-to-Back Converter for Medium Voltage DrivesGrupo de investigación
Sistemas electrónicos de potencia aplicados al control de la energía eléctricaOtras instituciones
Ingeteam (Spain)Versión
Postprint
Derechos
© 2016 IEEEAcceso
Acceso abiertoVersión del editor
http://doi.org/10.1109/TIE.2016.2580128Publicado en
IEEE Transactions on Industrial Electronics Vol. 63. N. 12. Pp. 7864-7875. June, 2016Primera página
7864Última página
7875Editor
IEEEPalabras clave
Modulation
Switches
Capacitors
Reactive power ... [+]
Switches
Capacitors
Reactive power ... [+]
Modulation
Switches
Capacitors
Reactive power
Support vector machines
Topology
Inverters [-]
Switches
Capacitors
Reactive power
Support vector machines
Topology
Inverters [-]
Resumen
The reduced capability of multilevel converters with more than one intermediate node to balance the dc-link capacitors voltage, as well as the lack of standard modulation methods to improve their bala ... [+]
The reduced capability of multilevel converters with more than one intermediate node to balance the dc-link capacitors voltage, as well as the lack of standard modulation methods to improve their balancing performance, makes these converter topologies unattractive for real power applications. This is especially true when the load demands active power. One of these topologies is the five-level multipoint clamped (5L-MPC) converter. The back-to-back (B2B) configuration of two 5L-MPC converters and the use of a space vector modulation (SVM) that exploits the voltage balancing capability of the redundant switching vectors extend the operation conditions range in which a proper voltage balance can be achieved. However, if practical modulation restrictions are considered (limitation of voltage steps, dead times, switching losses, etc.), the voltage balance cannot be achieved for all operation conditions. In this paper, an SVM which takes into account practical restrictions is proposed. In order to guarantee the voltage balance at any operation condition, the grid-side rectifier exchanges reactive power with the grid-side LCL filter. Thus, the voltage balance of the dc-link is guaranteed while a unity grid-side power factor is achieved. The proposed modulation scheme and the voltage balancing strategy are experimentally validated in a 6.6 kV 1.5 MW 5L-MPC B2B converter. [-]
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