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Patent US10186889
Issued 2019-01-22
Electrical Energy Storage System With Variable State-of-charge Frequency Response Optimization
A frequency response optimization system includes a battery configured to store and discharge electric power, a power inverter configured to control an amount of the electric power stored or discharged from the battery at each of a plurality of time steps during a frequency response period, and a frequency response controller. The frequency response controller is configured to receive a regulation signal from an incentive provider, determine statistics of the regulation signal, use the statistics of the regulation signal to generate an optimal frequency response midpoint that achieves a desired change in a state-of-charge (SOC) of the battery while participating in a frequency response program, and use the midpoints to determine optimal battery power setpoints for the power inverter. The power inverter is configured to use the optimal battery power setpoints to control the amount of the electric power stored or discharged from the battery.
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- 1. A frequency response optimization system comprising:
a battery configured to store and discharge electric power; a power inverter configured to control an amount of the electric power stored or discharged from the battery at each of a plurality of time steps during a frequency response period; and a frequency response controller configured to:
receive a regulation signal from an incentive provider,
determine statistics of the regulation signal,
use the statistics of the regulation signal to generate an optimal frequency response midpoint for participating in a frequency response program that simultaneously achieves a predefined change in a state-of-charge (SOC) of the battery, and
use the optimal frequency response midpoint to determine optimal battery power setpoints for the power inverter;
wherein the power inverter is configured to use the optimal battery power setpoints to control the amount of the electric power stored or discharged from the battery.
- 10. A method for optimizing frequency response, the method comprising:
receiving a regulation signal from an incentive provider; determining statistics of the regulation signal; using the statistics of the regulation signal to generate an optimal frequency response midpoint for participating in a frequency response program that simultaneously achieves a predefined change in a state-of-charge (SOC) of a battery; using the optimal frequency response midpoint to determine optimal battery power setpoints; and using the optimal battery power setpoints to control an amount of electric power stored or discharged from the battery.
- 19. A frequency response controller comprising:
a processing circuit configured to:
receive a regulation signal from an incentive provider;
determine statistics of the regulation signal;
use the statistics of the regulation signal to generate an optimal frequency response midpoint for participating in a frequency response program that simultaneously achieves a predefined change in a state-of-charge (SOC) of a battery;
use the optimal frequency response midpoint to determine optimal battery power setpoints; and
use the optimal battery power setpoints to control an amount of electric power stored or discharged from the battery.
