What is it about?
This paper proposes a new direct ac-ac converter for medium-voltage applications that inherent all the attributes of conventional modular multilevel converter such as: *Modular structure (reduces delivery and maintenance time). *Internal fault management (safeguard against cell capacitor and switching device failures). *Independent control of active and reactive power). *Light weight and footprint compared to ac-dc converters of similar ratings; thus attractive for FACTS devices.
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Why is it important?
The significance of this work: -Extends the application of direct ac-ac converters to medium and high voltage applications. -Provides method for construction of FACTS devices, which are much smaller and lighter compared to existing solutions that based on dc-ac converters (for the same power rating). -Unlike conventional matrix converter, the proposed ac-ac converter has modular structure with internal fault management. -Illustrates how a second harmonic can be used to decouple control of active power from that of the reactive power.
Perspectives
It is novel and interesting work, and practically useful work. So, I will say it is worth reading.
Dr Grain Philip Adam
University of Strathclyde
Read the Original
This page is a summary of: Three-Phase AC–AC Hexagonal Chopper System With Heterodyne Modulation for Power Flow Control Enhancement, IEEE Transactions on Power Electronics, October 2015, Institute of Electrical & Electronics Engineers (IEEE),
DOI: 10.1109/tpel.2014.2378018.
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