Method for controlling an energy storage system
First Claim
1. A method for controlling an energy storage system connected to an electric grid, the method comprising:
- determining at least two different energy services according to which the energy storage system is to be operated;
operating the same energy storage system in parallel according to the two different energy services to provide, from the energy storage system to the electric grid, total power associated with the two different energy services; and
decreasing provision of low-priority power associated with at least one out of the two different energy services in an ascending order of priority to adjust the total power to predefined power limits of the energy storage system, in case that the total power does not lie within the predefined power limits,wherein the two different energy services are prioritized using a descending order of Return on Investment (RoI) as a descending order of priority.
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Abstract
A method for controlling an energy storage system. The same battery system shall support multiple services at the same time. During a planning phase, the multiple services to be provided are determined, based on the market situation and the capabilities of the energy storage system, and prioritized according to predefined criteria. During an operation phase, the power and energy status of the energy storage system is periodically monitored, and compared against the power and energy demands of the multiple services, in order to determine whether at each time instance, the multiple services can indeed be supported at the same time. In case power and/or energy limits are exceeded by the multiple services, at least one service is interrupted to allow the operation of the energy storage system to be within power/energy limits again. The interrupted service(s) is resumed when the power/energy limits are met.
13 Citations
15 Claims
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1. A method for controlling an energy storage system connected to an electric grid, the method comprising:
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determining at least two different energy services according to which the energy storage system is to be operated; operating the same energy storage system in parallel according to the two different energy services to provide, from the energy storage system to the electric grid, total power associated with the two different energy services; and decreasing provision of low-priority power associated with at least one out of the two different energy services in an ascending order of priority to adjust the total power to predefined power limits of the energy storage system, in case that the total power does not lie within the predefined power limits, wherein the two different energy services are prioritized using a descending order of Return on Investment (RoI) as a descending order of priority. - View Dependent Claims (2, 3)
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4. A method for controlling an energy storage system connected to an electric grid, the method comprising:
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determining at least two different energy services according to which the energy storage system is to be operated; operating the same energy storage system in parallel according to the two different energy services to provide, from the energy storage system to the electric grid, total power associated with the two different energy services; decreasing provision of low-priority power associated with at least one out of the two different energy services in an ascending order of priority to adjust the total power to predefined power limits of the energy storage system, in case that the total power does not lie within the predefined power limits; monitoring an energy content of the energy storage system; monitoring a power demand corresponding to power to be provided to the electric grid according to each of the two different energy services; calculating a total power demand; and comparing the total power demand with the predefined power limits, wherein in a set-up mode, the method comprises the determining, in a working mode, the method comprises the operating, the monitoring of the energy content, the monitoring of the power demand, the calculating, the comparing, and the operating includes; operating the energy storage system according to, in parallel, the two different energy services, in case that the calculated total power demand lies within the predefined power limits and that the monitored energy content lies within predefined energy limits; and operating the energy storage system according to at least one of the two different energy services in a descending order of priority, in case that the calculated total power demand does not lie within the predefined power limits or that the monitored energy content does not lie within the predefined energy limits. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11)
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12. A control apparatus for controlling an energy storage system to be connected to an electric grid, comprising a processor, a memory, and communications circuitry, the processor being configured to:
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determine at least two different energy services according to which the energy storage system is to be operated; operate the same energy storage system according to, in parallel, the two different energy services to provide, from the energy storage system to the electric grid, total power associated with the two different energy services; and decrease provision of low-priority power associated with at least one of the two different energy services in an ascending order of priority to adjust the total power to a predefined power limits of the energy storage system, in case that the total power does not lie within the predefined power limits, wherein the two different energy services are prioritized using a descending order of Return on Investment (RoI) as a descending order of priority. - View Dependent Claims (13, 14, 15)
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Specification