Methods and systems for controlling an energy storage system to provide a frequency regulation service
AssigneeVestas Wind Systems A/S
InventorCasper Hillerup LYHNE
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Abstract
According to an aspect of the invention there is provided a method of controlling an energy storage system to provide a frequency regulation service for a power network, to which the energy storage system is connected. The energy storage system is controlled according to one or more regulations of the power network to counteract frequency deviations within a frequency contingency deadband of the power network to provide the frequency regulation service for a service period. The energy storage system is one of a plurality of energy storage systems connected to the power network, each energy storage system being operated to counteract the frequency deviations according to the one or more regulations of the power network.
Claims15
A method of controlling an energy storage system to provide a frequency regulation service for a power network, to which the energy storage system is connected, by controlling the energy storage system, according to one or more regulations of the power network, to counteract frequency deviations within a frequency contingency deadband of the power network for a service period, the energy storage system being one of a plurality of energy storage systems connected to the power network, each being operated to counteract the frequency deviations according to the one or more regulations of the power network, the method comprising:
- determining an estimate of stored energy for each energy storage system at the start of the service period;
- and
- during the service period:
- obtaining a measurement indicative of a frequency level of the power network;
- detecting a frequency deviation requiring counteraction by the plurality of energy storage systems based on the indicated frequency level;
- modelling the response, according to the one or more regulations, of each energy storage system to the frequency deviation;
- estimating a remaining amount of stored energy at each energy storage system;
- and
- detecting a fault condition if the estimate of the remaining stored energy at each energy storage system is indicative of an inability of the plurality of energy storage systems to counteract a subsequent frequency deviation.
An energy storage system controller configured to perform an operation of controlling an energy storage system to provide a frequency regulation service for a power network, to which the energy storage system is connected, by controlling the energy storage system, according to one or more regulations of the power network, to counteract frequency deviations within a frequency contingency deadband of the power network for a service period, the energy storage system being one of a plurality of energy storage systems connected to the power network, each being operated to counteract the frequency deviations according to the one or more regulations of the power network, the operation comprising:
- determining an estimate of stored energy for each energy storage system at the start of the service period;
- and
- during the service period:
- obtaining a measurement indicative of a frequency level of the power network;
- detecting a frequency deviation requiring counteraction by the plurality of energy storage systems based on the indicated frequency level;
- modelling the response, according to the one or more regulations, of each energy storage system to the frequency deviation;
- estimating a remaining amount of stored energy at each energy storage system;
- and
- detecting a fault condition if the estimate of the remaining stored energy at each energy storage system is indicative of an inability of the plurality of energy storage systems to counteract a subsequent frequency deviation.
Dependencies are inferred from the claim text.