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Limitations of Basic Power-Converter Topologies
Abstract: Modular multilevel converters (MMCs) have paved the way for power electronics in very demanding application areas. While becoming the worldwide standard for high-voltage ... View more
Modular multilevel converters (MMCs) have paved the way for power electronics in very demanding application areas. While becoming the worldwide standard for high-voltage dc (HVDC), many other future applications are emerging. More and more, the functionality and cost of power electronics must be judged from a superordinate system view. Passive components "around" the converter, such as mechanical switchgear, fuses, overvoltage surge suppressors, and filters offer very low potential for future progress. With respect to protection, the scope must be widened from the semiconductors to the protection of the associated equipment (e.g., motors, drive trains, power net, and so on).
Published in: IEEE Power Electronics Magazine ( Volume: 5 , Issue: 4 , December 2018 )
Date of Publication: 19 December 2018
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Modular multilevel converters (MMCs) have paved the way for power electronics in very demanding application areas. While becoming the worldwide standard for high-voltage dc (HVDC), many other future applications are emerging. More and more, the functionality and cost of power electronics must be judged from a superordinate system view. Passive components “around” the converter, such as mechanical switchgear, fuses, overvoltage surge suppressors, and filters offer very low potential for future progress. With respect to protection, the scope must be widened from the semiconductors to the protection of the associated equipment (e.g., motors, drive trains, power net, and so on). Typical future requirements at the system level include:
•
the extremely high availability of the whole power electronic system from providing “inherent redundancy”
the improved scalability of the power converter as a result of using identical submodules (SMs)
eliminating large passive filters (e.g., ac harmonic filters and dc capacitors)
exchanging real power between several systems/drives via a common network (i.e., a multiterminal dc).
2006 IEEE Power Engineering Society General Meeting
2018 IEEE International Conference on Industrial Technology (ICIT)
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