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This paper proposes a novel control strategy-Coordinated DC Voltage Control (CDVC)-to enhance the AC fault ride through capability of Multi-terminal HVDC system. It is able to keep DC voltage constant and distribute power fast and smoothly, independent on line impedance parameters. Combined with this original control strategy, a series of AC fault ride through methods, including voltage reduction,...
A novel back to back cascaded medium voltage converter is proposed for wind power generation. In the generator side, it is a H-bridge cascaded converter, which employs the vector control based on rotor flux orient to drive the medium induction generator. In the grid side, a series of two-level voltage source converters are used to support an isolated DC voltage for each H-bridge cell in the generator...
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