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HYBRID DISTRIBUTION TRANSFORMER WITH AN INTEGRATED VOLTAGE SOURCE CONVERTER

  • US 20100220499A1
  • Filed: 02/26/2010
  • Published: 09/02/2010
  • Est. Priority Date: 02/27/2009
  • Status: Active Grant
First Claim
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1. A hybrid distribution transformer having a primary side for receiving input voltage and current from a source and a secondary side for providing output voltage and current to a load, the hybrid distribution transformer comprising:

  • a ferromagnetic core;

    a winding structure comprising first and second windings wound around the core, wherein one of the first and second windings is a primary winding for connection to the source and one of the first and second windings is a secondary winding for connection to the load; and

    a voltage source converter is connected to the first winding and is operable to convert between DC and AC voltages, the voltage source converter comprises;

    at least one switching bridge comprising two or more switching devices;

    a DC bus connected in parallel with the at least one switching bridge; and

    a controller operable to control the at least one switching bridge to control the power factor on the primary side of the hybrid distribution transformer and to reduce variations in the output voltage in the event of a change in the input voltage.

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