Energy storage controller with battery life model
AssigneeCon Edison Battery Storage, LLC
InventorsMichael J. Wenzel, Brett M. Lenhardt, Kirk H. Drees
Life of this patent
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Abstract
An electrical energy storage system includes a battery configured to store and discharge electric power to an energy grid, a power inverter configured to use battery power setpoints to control an amount of the electric power stored or discharged from the battery, the battery power setpoints comprising at least one of frequency regulation power setpoints and ramp rate control power setpoints, and a controller. The controller is configured to use a battery life model to generate the battery power setpoints for the power inverter. The battery life model includes one or more variables that depend on the battery power setpoints.
Claims20
An electrical energy storage system comprising:
- a battery configured to store electric power and discharge electric power to an energy grid;
- a power inverter configured to control an amount of the electric power stored to or discharged from the battery;
- and
- a controller configured to
- determine battery power setpoints for the power inverter based on a battery life model, the battery life model including at least one variable that depends on the battery power setpoints,
- determine an amount of battery degradation for the battery based on the at least one variable,
- estimate an amount of frequency response revenue to be lost due to the amount of battery degradation for the battery, and
- modify the battery power setpoints based on the estimated amount of frequency response revenue to be lost due to the amount of battery degradation for the battery.
A method of operating an electrical energy storage system, the method comprising:
- determining battery power setpoints for a power inverter based on a battery life model, the battery life model including at least one variable that depends on the battery power setpoints;
- determining an amount of battery degradation for the battery based on the at least one variable;
- estimating an amount of frequency response revenue to be lost due to the amount of battery degradation for the battery;
- and
- modifying the battery power setpoints based on the estimated amount of frequency response revenue to be lost due to the amount of battery degradation for the battery.
A controller for an electrical energy storage system, the controller including a computer readable medium and a processor, the controller comprising computer executable instructions stored in the computer readable medium for controlling the electrical energy storage system to:
- determine battery power setpoints for the power inverter based on a battery life model, the battery life model including at least one variable that depends on the battery power setpoints;
- determine an amount of battery degradation for the battery based on the at least one variable;
- estimate an amount of frequency response revenue to be lost due to the amount of battery degradation for the battery;
- and
- modify the battery power setpoints based on the estimated amount of frequency response revenue to be lost due to the amount of battery degradation for the battery.
Dependencies are inferred from the claim text.