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Energy storage modeling and control

  • US 9,509,176 B2
  • Filed: 03/15/2013
  • Issued: 11/29/2016
  • Est. Priority Date: 04/04/2012
  • Status: Active Grant
First Claim
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1. A computerized method for controlling balancing services based on a combination of an energy storage system and reserves using a computer, the method comprising:

  • receiving at the computer a first physical model relating to a rate of degradation of the energy storage system;

    retrieving from a first database, using the computer, first historical data relating to historical renewable energy generation;

    retrieving from a second database, using the computer, second historical data relating to historical forecast error;

    receiving at the computer one or more possible configurations for the energy storage system;

    receiving at the computer a cost model for the energy storage system;

    receiving at the computer information relating to a cost of providing the reserves;

    receiving at the computer one or more possible operating strategies of the energy storage system for minimizing a cost of the balancing services,wherein the one or more possible operating strategies are computed viacalculating, using the computer, a renewable energy power supply commitment based on forecasted renewable energy generation and user defined renewable energy power shaping requirements; and

    calculating, using the computer, a difference between the calculated renewable energy power supply commitments and real-time renewable energy generation,wherein the renewable energy power supply commitment comprises a plurality of power block commitments, each of the power block commitments being characterized by a duration, a slope, and a jump from an adjacent power block commitment, andthe user defined renewable energy power shaping requirements comprise a maximum allowed slope and a maximum allowed jump from an adjacent power block commitment for the power block commitments;

    receiving at the computer a second physical model relating to forecast uncertainty;

    calculating, using the computer, an optimal combination of the energy storage system and the reserves that minimizes a cost of balancing the difference based on the first historical data, the second historical data, the first and second physical models, the information relating to a cost of providing the reserves, the one or more possible energy storage system configurations, the one or more possible energy storage system operating strategies, and the cost model; and

    charging or discharging, using a controller, an energy storage asset of the energy storage system in accordance with the calculated optimal combination of the energy storage system and the reserves.

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