Auxiliary electric energy storage and supply system for a power plant
First Claim
1. An annex electric energy supply system for an electrical power plant coupled to an electricity transmission network, the electrical power plant including a main electric energy production unit that includes at least one turbine connected to a generator, said annex electric energy supply system comprising:
- an energy extraction network coupled to the transmission network, said energy extraction network configured to receive AC current from the main electric energy production unit;
a main auxiliary AC power bus network coupled to said energy extraction network, said main auxiliary AC power bus network operable to power auxiliary equipment required for operation of the electrical power plant; and
a secondary electric energy supply unit comprising at least one continuously operable electric energy restitution and storage unit, said at least one electric energy restitution and storage unit comprising at least one electric energy storage element coupled to a first means for reversible conversion from direct current to alternating current, said first means for reversible conversion controllable to selectively (i) charge said at least one storage element from electric energy delivered by said main auxiliary AC power bus network, and (ii) discharge electric energy stored in said at least one storage element to said main auxiliary AC power bus network, wherein said secondary electric energy supply unit is configured to at least one of;
provide to the electricity transmission network, at least via said main auxiliary AC power bus network, a first profile of electric power at least sufficient to provide services requested by the electricity transmission network; and
provide to said main auxiliary AC power bus network a second profile of power required to operate the auxiliary equipment of the power plant in case of inoperability of a normal AC power supply source of said main auxiliary AC power bus network.
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Accused Products
Abstract
An annex supply system for an electrical power plant includes an energy extraction network configured to receive AC current from a main production unit, a main auxiliary network coupled to the extraction network, and a secondary supply unit. The secondary unit includes a storage element coupled to a means for reversible conversion from direct to alternating current that is controllable to selectively (i) charge the storage element from the main auxiliary network, and (ii) discharge energy from the storage element to the main auxiliary network. The secondary unit is configured to (i) provide a first power profile at least sufficient to provide services to a transmission network, and/or (ii) provide to the main auxiliary network a second power profile required to operate auxiliary equipment in case of inoperability of a normal power supply source of the main auxiliary network.
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Citations
20 Claims
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1. An annex electric energy supply system for an electrical power plant coupled to an electricity transmission network, the electrical power plant including a main electric energy production unit that includes at least one turbine connected to a generator, said annex electric energy supply system comprising:
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an energy extraction network coupled to the transmission network, said energy extraction network configured to receive AC current from the main electric energy production unit; a main auxiliary AC power bus network coupled to said energy extraction network, said main auxiliary AC power bus network operable to power auxiliary equipment required for operation of the electrical power plant; and a secondary electric energy supply unit comprising at least one continuously operable electric energy restitution and storage unit, said at least one electric energy restitution and storage unit comprising at least one electric energy storage element coupled to a first means for reversible conversion from direct current to alternating current, said first means for reversible conversion controllable to selectively (i) charge said at least one storage element from electric energy delivered by said main auxiliary AC power bus network, and (ii) discharge electric energy stored in said at least one storage element to said main auxiliary AC power bus network, wherein said secondary electric energy supply unit is configured to at least one of; provide to the electricity transmission network, at least via said main auxiliary AC power bus network, a first profile of electric power at least sufficient to provide services requested by the electricity transmission network; and provide to said main auxiliary AC power bus network a second profile of power required to operate the auxiliary equipment of the power plant in case of inoperability of a normal AC power supply source of said main auxiliary AC power bus network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An electrical power plant coupled to an electricity transmission network, said electrical power plant comprising:
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a main electric energy production unit comprising; a generator; at least one turbine connected to said generator; and auxiliary equipment required for operation of said electrical power plant; and an annex electric energy supply system comprising; an energy extraction network coupled to the transmission network, said energy extraction network configured to receive AC current from said main electric energy production unit; a main auxiliary AC power bus network coupled to said energy extraction network, said main auxiliary AC power bus network operable to power said auxiliary equipment; and a secondary electric energy supply unit comprising at least one continuously operable electric energy restitution and storage unit, said at least one electric energy restitution and storage unit comprising at least one electric energy storage element coupled to a first means for reversible conversion from direct current to alternating current, said first means for reversible conversion controllable to selectively (i) charge said at least one storage element from electric energy delivered by said main auxiliary AC power bus network, and (ii) discharge electric energy stored in said at least one storage element to said main auxiliary AC power bus network, wherein said secondary electric energy supply unit is configured to at least one of; provide to the electricity transmission network, at least via said main auxiliary AC power bus network, a first profile of electric power at least sufficient to provide services requested by the electricity transmission network while said main electric energy production unit is shutdown; and provide to said main auxiliary AC power bus network a second profile of power required to operate said auxiliary equipment in case of inoperability of a normal power supply source of said main auxiliary AC power bus network.
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20. An electrical power plant coupled to an electricity transmission network, said electrical power plant comprising:
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a main electric energy production unit comprising; a generator; at least one turbine connected to said generator; and auxiliary equipment required for operation of said electrical power plant; and an annex electric energy supply system comprising; an energy extraction network coupled to the transmission network, said energy extraction network configured to receive AC current from said main electric energy production unit; a main auxiliary network coupled to said energy extraction network, said main auxiliary network operable to power said auxiliary equipment; and a secondary electric energy supply unit comprising at least one continuously operable electric energy restitution and storage unit, said at least one electric energy restitution and storage unit comprising at least one electric energy storage element coupled to a first means for reversible conversion from direct current to alternating current, said first means for reversible conversion controllable to selectively (i) charge said at least one storage element from electric energy delivered by said main auxiliary network, and (ii) discharge electric energy stored in said at least one storage element to said main network, wherein said secondary electric energy supply unit is configured to at least one of; provide to the electricity transmission network a first profile of electric power at least sufficient to provide services requested by the electricity transmission network while said main electric energy production unit is shutdown; and provide to said main auxiliary network a second profile of power required to operate said auxiliary equipment in case of inoperability of a normal power supply source of said main auxiliary network, wherein said at least one electric energy restitution and storage unit further comprises a second means for reversible conversion from direct current to alternating current, said second means for reversible conversion connected to said at least one electric energy storage element and controllable to enable said secondary electric energy supply unit to selectively (i) supply electrical energy to said generator during a startup phase of said main electric energy production unit from at least one of a voltage available on said main auxiliary network and an energy available in said at least one electric energy storage element, and (ii) charge at least one of said at least one electric energy storage element and said normal power supply source of said main auxiliary network by energy drawn through said second means for reversible conversion directly from terminals of said generator during operation of said generator.
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Specification