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Solid state transformer (SST) is considered as a key device for energy internet to interconnect renewable energy resource, energy storage devices and loads. Rectifier stage of SST absorbs sinusoidal input current and maintains constant dc-link voltage. This paper proposes a predictive direct power control (PDPC) methods utilizing the DQ rotating frame to control the active and reactive power dynamics...
Solid state transformer (SST) enabled microgrid is the trend of microgrid. The aim of rectifier stage of SST is to absorb sinusoidal input current and maintains constant dc-link voltage. In the SST over scheme, dual active bridge is employed to supply the dc bus, which behave as a constant power load for the rectifier stage. The constant power loads have a characteristic of negative incremental impedance,...
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