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How to quantify energy storage? 


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Energy storage can be quantified using different methods. One approach is to decompose the complete response of the system into the superposition of frequency trajectories caused by the independent action of power from different sources. This allows for the quantification of the effect of each energy storage system by convolving its active power with the impulse response of the system excluding energy storage systems . Another method involves determining the sizes of energy storage systems based on composite system reliability analysis, considering factors such as wind power uncertainty and variability, failures of wind turbine generators, wind speed temporal resolution, and correlation with system load . Additionally, a method has been developed to measure the energy storage level of a self-energy-storage rock mass, taking into account different occurrence depths and rock deformation parameters . Monte Carlo simulation can also be used to assess the amount of storage required to enhance system reliability and firm up wind power . Finally, characterization models have been proposed to quantify the relationship between wind power curtailment rate and energy storage parameters, considering wind uncertainty .

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The paper proposes two characterization models to quantify the relationship between wind power curtailment rate and energy storage parameters.
The paper describes a practical approach using Monte Carlo simulation to quantify the amount of energy storage required to enhance system reliability and firm up wind power.
The paper provides a method for quantitatively characterizing the energy storage level of a self-energy-storage rock mass using a formula (3).
The paper proposes a method to quantitatively determine the sizes of energy storage systems based on composite system reliability analysis under operational and technical constraints.
The paper proposes a method to quantify the effect of each energy storage by convolving its active power with the impulse response of the system excluding energy storages.

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