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Methods, systems and apparatus for regulating frequency of generated power using flywheel energy storage systems with varying load and/or power generation

  • US 9,065,295 B2
  • Filed: 07/28/2011
  • Issued: 06/23/2015
  • Est. Priority Date: 08/15/2003
  • Status: Active Grant
First Claim
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1. A method for controlling AC frequency of electrical power being distributed to a power distribution grid, wherein the power distribution grid includes a plurality of electrical loads interconnected with a plurality of power generation facilities, and wherein a power generated by at least one of the plurality of power generation facilities is being adjusted, based on a grid parameter, to control the AC frequency, the frequency control method comprising the steps of:

  • electrically coupling an energy storage subsystem to the power distribution grid, said energy storage sub system comprising a plurality of flywheel energy storage systems;

    receiving a signal that depends on the grid parameter, wherein the signal specifies an amount of electrical power to be added to the power distribution grid from the energy storage subsystem or absorbed from the power distribution grid by the energy storage subsystem, the amount being an amount established to regulate the AC frequency of the electrical power on the power distribution; and

    controlling, by an array controller and based on the received signal, the plurality of flywheel energy storage systems so the energy storage sub-system adds the amount of electrical power when the received signal indicates that electrical power is to be added to the power distribution grid and absorbs the amount of electrical power when the received signal indicates that electrical power is to be absorbed from the power distribution grid.

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