Combined Voltage Balancing Techniques of the DC Link in Five-Level Medium Voltage NPC Back-to-Back Converters for Offshore Renewable Generation
Paper i proceeding, 2017

The voltage balancing of the dc-link capacitors in an electric drive system with five-level neutral-pointclamped converters is investigated in this paper. A properly modified space-vector-modulation technique is utilized in combination with a multilevel dc/dc converter for controlling the capacitor voltages. An advanced algorithm has been developed for reducing the losses of the electric drive system and for ensuring that the capacitor voltages are balanced in every operating condition. The developed electric drive system can be used in offshore power plants for driving medium voltage generators. Selective simulation results are presented to validate the theoretical considerations.

Vector control

Multilevel converters

Converter control

Variable speed drive

High voltage power converters


Georgios Mademlis

Chalmers, Energi och miljö, Elkraftteknik

Yujing Liu

Chalmers, Energi och miljö, Elkraftteknik

Nima Saadat

Chalmers, Energi och miljö, Elkraftteknik

2017 19th European Conference on Power Electronics and Applications

2325-0313 (ISSN)





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