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Voltage source converters operating either as back-to-back stations or as parallel static var compensators

  • US 6,411,067 B1
  • Filed: 02/20/2001
  • Issued: 06/25/2002
  • Est. Priority Date: 02/20/2001
  • Status: Expired due to Term
First Claim
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1. A device for controlling the flow of electric power in a transmission line carrying alternating current, said device comprising:

  • a first voltage source converter connected to the transmission line at a first point;

    a second voltage source converter connected to the transmission line at a second point, said first and second voltage source converters having their direct current sides connected to a common capacitor unit;

    a by-pass switch connected to the transmission line between said first point and said second point in parallel with the first and second voltage source converters so that the first and second voltage source converters will operate as a back-to-back station when the by-pass switch is open and as two parallel static var compensators when the by-pass switch is closed.

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