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Power supply system for an electrical drive of a marine vessel

  • US 9,381,990 B2
  • Filed: 01/19/2012
  • Issued: 07/05/2016
  • Est. Priority Date: 02/01/2011
  • Status: Expired due to Fees
First Claim
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1. A power supply system for compensation for heave of a marine drilling vessel, the power supply system comprising:

  • a main power source;

    an electric energy storage device coupled to the main power source via a DC bus; and

    an electric motor/generator electrically coupled via the DC bus to the main power source and the electric energy storage device,wherein the electric motor/generator is configured to receive electric energy from one or more of the main power source and the electric energy storage device to operate the electric motor/generator as a motor in a first operating state when the marine vessel lowers to a wave trough,wherein the electric motor/generator is configured to charge the electric energy storage device to operate as a generator in a second operating state when the marine vessel rises to a wave crest; and

    wherein the electric motor/generator is an electrical drive of at least one or more of a marine active heave compensating draw works, a draw works of a marine drilling rig, a marine anchor winch drive, and a top drive of a marine drilling rig.

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