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Auxiliary electric energy storage and supply system for a power plant

  • US 10,243,366 B2
  • Filed: 08/07/2015
  • Issued: 03/26/2019
  • Est. Priority Date: 08/07/2015
  • Status: Active Grant
First Claim
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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:

  • 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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