Power supply system for an electrical drive of a marine vessel
First Claim
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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Accused Products
Abstract
A power supply system for an electrical drive of a marine vessel is provided. The electrical drive includes an electric motor that is adapted to receive electric energy from a power source. The electrical drive has a first operating state in which electric energy is supplied by the power source to the electrical drive to operate the electrical drive and a second operating state in which the electric motor of the electrical drive is decelerated or braked, wherein the electrical drive generates electric energy in the second operating state. The power supply system comprises an electric energy storage device for storing generated electric energy.
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Citations
13 Claims
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1. A power supply system for compensation for heave of a marine drilling vessel, the power supply system comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of operating a power supply system for compensation for heave of a marine drilling vessel, the method comprising:
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compensating for heave of the marine vessel by an electric motor/generator, wherein the electric motor/generator is an electric 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; supplying power to the electric motor/generator from one or more of a main power source and an electric energy storage device, wherein the electric motor/generator is coupled via a DC bus to the main power source and the electric energy storage device, wherein the electric motor/generator is configured to receive electric energy to operate the electric motor/generator as a motor in a first operating state when the marine vessel lowers to a wave trough; storing power to the electric energy storage device from the electric motor/generator;
wherein the electric motor/generator is configured to charge the energy storage device to operate as a generator in a second operating state when the marine vessel rises to a wave crest.
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13. A marine vessel comprising:
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An electric drive of 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, wherein the electrical drive comprises an electric motor/generator; a main power source comprising a generator coupled to one or more of a gas turbine and a diesel engine; and an electric energy storage device comprising at least one or more of a battery and a capacitor bank; wherein the electric motor/generator is electrically coupled via a 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, and 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.
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Specification