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Responding to local grid events and distributed grid events

  • US 9,368,968 B2
  • Filed: 12/28/2012
  • Issued: 06/14/2016
  • Est. Priority Date: 12/28/2012
  • Status: Expired due to Fees
First Claim
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1. A system comprising:

  • an energy storage device coupled to an electrical grid;

    a plurality of sensors coupled to the electrical grid, the electrical grid comprising a plurality of metering nodes at different geographic locations, each sensor being coupled to a metering node;

    a control system coupled to the energy storage device and the sensors, wherein the control system is configured to;

    receive a measurement from each of the sensors;

    determine, based on the received measurement, whether a grid event is a local event or a distributed event; and

    select a response mode for controlling the energy storage device based on whether the grid event is determined to be a local event or a distributed event;

    wherein determining whether a grid event is a local event or a distributed event comprises calculating a difference between a first phase angle at a first sensor of the plurality of sensors and a second phase angle at a second sensor of the plurality of sensors, and, if the difference exceeds a threshold, determining that the grid event is a distributed event.

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