US 12,651,903 B2 · Grid power response with optimally sized storage

Abstract

An electrical response system allows both traditional and renewable power generating system primary frequency response (PFR), fast frequency response (FFR) and inertial response systems to coordinate their response operations with an energy storage system and optimally pre-size the energy storage system and its charge. The response system allows the energy storage system to be optimally pre-sized by coordinating a power generating system to respond (a) during an over-frequency event by reducing active power output, and (b) during an under-frequency event by the storage discharging active power, thereby providing a coordinated response. Under-frequency events cause power generating systems to pre-curtail their active power output to meet grid requirements, thereby the system and method allows a power generating system to generate active power output at full nameplate capacity while simultaneously meeting electrical grid regulations and requirements.

Claims19

Dependent claims

A system for providing electrical energy to an electrical grid, the system having an electrical generator connected to the electrical grid, the system comprising:

(a) an energy storage device for storing the electrical energy, the energy storage device being operable to receive the electrical energy from at least one of the electrical generator and the electrical grid, the energy storage device being operable to provide the electrical energy to the electrical grid;
and
(b) a controller operable to:
reduce an output level of the electrical generator in response to an over-frequency event;
cause the energy storage device to provide the electrical energy to the electrical grid in response to an under-frequency event;
adjust a state of charge (SOC) of the energy storage device in response to the output level of the electrical generator;
and
adjust the SOC such that a first ratio, of the SOC to a maximum SOC of the energy storage device, matches a second ratio, of the output level of the electrical generator to a maximum output level of the electrical generator.

5 more elements

A computer-implemented method of controlling electrical energy supplied to an electrical grid to which an electrical generator is connected, the method comprising:

(a) storing, in an energy storage device, the electrical energy, which is received from at least one of the electrical generator and the electrical grid;
(b) detecting, by a controller, an over-frequency event;
(c) in response to the over-frequency event, controlling the electrical generator by the controller to reduce an output level of the electrical generator;
(d) detecting, by the controller, an under-frequency event;
(e) in response to the under-frequency event, controlling the energy storage device by the controller to provide the electrical energy from the energy storage device to the electrical grid;
(f) adjusting, by the controller, a state of charge (SOC) of the energy storage device in response to the output level of the electrical generator, comprising adjusting the SOC such that a first ratio, of the SOC to a maximum SOC of the energy storage device, matches a second ratio, of the output level of the electrical generator to a maximum output level of the electrical generator.

3 more elements

Dependencies are inferred from the claim text.

Grid power response with optimally sized storage

Life of this patent

Grid power response with optimally sized storage

Life of this patent

Abstract

Claims19