Capacity Configuration of Hybrid Energy Storage
To leverage the efficacy of different types of energy storage in improving the frequency of the power grid in the frequency regulation of
To leverage the efficacy of different types of energy storage in improving the frequency of the power grid in the frequency regulation of the power system, we scrutinized the capacity allocation of hybrid energy storage power stations when participating in the frequency regulation of the power grid.
The frequency regulation capacity of the hybrid power system during emergency conditions is quantified using the ”frequency security margin ”. This concept is defined as the maximum allowable power imbalance, constraining the system's frequency fluctuations within acceptable limits.
Based on a simplified frequency response model, an optimal hybrid energy storage configuration method is proposed to optimize the control parameters, location, and capacity to satisfy the frequency dynamic constraints. This configuration method can exploit the potential of energy storage with different rates in different frequency support stages.
The optimization framework of co-ordinated scheduling method is necessitated to develop fast frequency reserve provision in a hybrid power system, which leverages the physical capacity of the power transmission lines while maintaining the curtail ratio of PE-interfaced renewable energy sources within a reasonable range.
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