Control of energy storage systems

Patent metadata

Field	Value
Publication number	US-12398697-B2
Application number	US-202218692364-A
Country	US
Kind code	B2
Filing date	Sep 20, 2022
Priority date	Sep 24, 2021
Publication date	Aug 26, 2025
Grant date	Aug 26, 2025

Abstract

A method of controlling an operation of energy storage systems of a wind park is provided. The wind park includes a plurality of energy storage systems each of which is associated with a wind turbine comprised by the wind park. Further, each of the plural energy storage systems is configured to be operable to provide electrical energy to an auxiliary system of the associated wind turbine. The method includes obtaining for each of the energy storage systems storage system state information indicating an availability of the energy storage system to store and/or provide electrical energy and operating the plural energy storage systems as a combined energy storage system based on the obtained storage system state information. The method further includes controlling the providing of electrical energy from the combined energy storage system and/or the storing of electrical energy in the combined energy storage system.

First claim

The invention claimed is:

1. A method of controlling an operation of energy storage systems of a wind park, wherein the wind park comprises a plurality of energy storage systems each of which is associated with a wind turbine comprised by the wind park, and wherein each of the plurality of the energy storage systems is configured to be operable to provide electrical energy to an auxiliary system of the associated wind turbine to power the auxiliary system when the wind turbine is disconnected from a power grid, wherein the method comprises:
obtaining for each of the energy storage systems storage system state information indicating an availability of the energy storage systems to store and/or provide the electrical energy;
operating the plurality of the energy storage systems as a combined energy storage system based on the obtained storage system state information; and
controlling the providing of the electrical energy from the combined energy storage system to the power grid and/or to a load, and/or the storing of the electrical energy in the combined energy storage system;
wherein the controlling of the providing of the electrical energy from the combined energy storage system includes maintaining a reserve margin of energy in at least some of plurality of the energy storage systems, the reserve margin of energy being an amount of energy reserved for powering the auxiliary system of the associated wind turbine when the wind turbine is disconnected from the power grid.

2. The method according to claim 1 , wherein the method further comprises:
operating the plurality of the energy storage systems such that each energy storage system provides the electrical energy to the associated wind turbine when the wind park is disconnected from the power grid.

3. The method according to claim 1 , wherein each energy storage system is configured to be operable to provide the electrical energy to the power grid and/or the load, and wherein the method comprises controlling the combined energy storage system to provide stored electrical energy to the power grid and/or load, and/or to store the electrical energy received from the power grid.

4. The method according to claim 3 , wherein the method comprises:
performing a grid service by the controlling of the combined energy storage system, wherein the grid service is at least one of a grid black start, a grid frequency support, a reactive power support, a virtual inertia, and energy arbitrage.

5. The method according to claim 1 , wherein the combined energy storage system is controllable to provide and/or store the electrical energy to perform a plurality of services, wherein a first service is associated with a higher priority than a second service, wherein the method further comprises:
providing a larger fraction of a storage capacity of the combined energy storage system for the first service than for the second service, and/or reserving a predetermined amount of storage capacity of the combined energy storage system for use by the first service.

6. The method according to claim 1 , wherein the method further comprises:
monitoring one or more prediction parameters to generate one or more monitored prediction parameters;
predicting based at least on the one or more prediction parameters a schedule of upcoming energy demands of providing and/or storing the electrical energy; and
adjusting the controlling of the providing and/or storing of the combined energy storage system based on the schedule.

7. The method according to claim 1 , wherein the method further comprises:
determining an available amount of energy or available level of power of the combined energy storage system, wherein determining the amount of energy or level of power comprises; and
deriving the available amount of energy or available level of power based on the obtained storage system state information.

8. The method according to claim 1 , wherein the storage system state information comprises information indicative of a deployable capacity of the respective energy storage system, wherein the deployable capacity is that portion of capacity of the respective energy storage system that is available for use in the combined energy storage system.

9. The method according to claim 8 , wherein the deployable capacity of the energy storage system is based on a parameter that is indicative of the reserve margin of energy of that energy storage system from which the storage system state information is obtained, and wherein the associated wind turbine of the energy storage system is operable in a grid disconnected operation mode in which the wind turbine is disconnected from the grid, and the reserve margin of energy is an amount of energy reserved for operating the associated wind turbine in the grid disconnected operation mode, and wherein the method further comprises
determining the reserve margin of energy.

10. The method according to claim 9 , wherein determining the reserve margin comprises:
deriving the reserve margin of energy from a predetermined value, wherein the predetermined value is based on a duration during which the wind turbine operates in the grid disconnected operation mode on average,
or,
wherein determining the reserve margin of energy is based on a model, wherein the model is configured to map at least a monitored operating condition of the wind turbine onto a parameter indicative of the reserve margin of energy, and wherein determining the reserve margin of energy comprises:
monitoring an operating condition of the wind turbine to generate the monitored operating condition;
mapping the monitored operating condition onto the indicative parameter by the model; and
deriving the reserve margin of energy based on the indicative parameter.

11. The method according to claim 1 , wherein the storage system state information comprises a parameter that is indicative of the reserve margin of energy of that energy storage system from which the storage system state information is obtained, the method further comprising:
monitoring an operating condition of the energy storage system from which the storage system state information is obtained to generate a monitored operating condition;
deriving the amount of energy of the energy storage system that is available to be provided by the energy storage system based at least on the monitored operating condition and the parameter indicative of the determined reserve margin; and
providing the derived available amount of energy in the storage system state information.

12. The method according to claim 1 , wherein the method further comprises:
determining a level of power that is available to be provided by the combined energy storage system, wherein determining the level of power further comprises:
monitoring for each energy storage system of plurality of the energy storage systems an operating condition to generate a monitored operating condition;
deriving for each of the energy storage systems an individual level of power that is available to be provided by the energy storage system based on the monitored operating condition; and
deriving the level of power that is available to be provided by the combined energy storage system based on the individual levels of power derived for each of the energy storage systems.

13. The method according to claim 1 , wherein the method further comprises:
requesting the storage system state information from at least a portion of the plurality of the energy storage systems; and in response
receiving the requested storage system state information from the respective energy storage systems.

14. A control system for controlling an

Assignees

• Siemens Gamesa Renewable Energy As

Inventors

• Hawkins Samuel
• Stoettrup Michael

Classifications

• H02J2101/28

  Wind energy · CPC title

• H02J3/38

  Arrangements for feeding a single network from two or more generators or sources in parallel; Arrangements for feeding already energised networks from additional generators or sources in parallel · CPC title

• H02J3/003

  Load forecast, e.g. methods or systems for forecasting future load demand · CPC title

• F03D80/003

  Power-supply to auxiliary components, e.g. to pitch drives or cooling fans · CPC title

• F03D7/048

  controlling wind farms · CPC title