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DC CONNECTION SCHEME FOR WINDFARM WITH INTERNAL MVDC COLLECTION GRID

  • US 20130197704A1
  • Filed: 02/01/2012
  • Published: 08/01/2013
  • Est. Priority Date: 02/01/2012
  • Status: Active Grant
First Claim
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1. A connection scheme for offshore power generation with an internal collection grid, comprising:

  • a power generation system including a plurality of generator-rectifier subsystems, said subsystems having at least one generator with an active rectifier, each said active rectifier having a positive DC voltage output and a negative DC voltage output;

    a medium voltage DC (MVDC) collection network comprising positive pole cables and negative pole cables, and connected to said DC outputs of generator-rectifier subsystems;

    at least one offshore substation comprising;

    a positive bus bar and a negative bus bar correspondingly connected to said positive pole cables and negative pole cables of said MVDC collection network; and

    a plurality of main DC-DC converters, each said main DC-DC converter comprising multiple modules connected to said MVDC bus bars, each said module having a positive output and a negative output such that said modules'"'"' outputs are serially connected to one another; and

    a high voltage DC (HVDC) transmission system comprising at least two DC transmission lines connected to said modules'"'"' outputs.

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