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At high voltage and power levels in utility-scale applications, transformers are needed to step-down grid voltages for integrating renewables and motors. A novel single-stage solid state transformer (SST) interface using modular multilevel converter (MMC) is proposed to interface a low voltage machine with a high voltage DC grid. Due to its modular structure, the high voltage side is easily scalable...
This paper discusses a modified indirect space vector pulse-width modulation (ISVPWM) technique for common mode voltage (CMV) reduction in a matrix converter (MC). The ISVPWM technique offers immense flexibility in making an intelligent choice of space vectors to not only achieve the objective of variable speed operation of the drive but also target other advanced features like reduced CMV and improved...
Power electronic transformer consisting of power converters and a high frequency transformer (HFT) can be used to interface a low voltage machine to a high voltage grid. A modular multilevel converter (MMC) is proposed as the power converter on the high voltage side to generate high frequency, adjustable magnitude sinusoidal voltages. A matrix converter (MC) is used on the low voltage side to synthesize...
This paper presents an analysis and comprehensive comparison between the passive filter component requirements of a matrix converter and a DC-link based back-to-back converter. Proper design of the filter components requires the estimation of the switching frequency components present in various voltages and currents. An accurate estimation of different ripple quantities is presented by simple analytical...
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