Impact of Time-Coupled Generator Formulation on Energy Storage Sizing Problem

With increasing wind power capacity integrated in bulk power systems, energy storage sizing problem raised with growing attention. However, different generator model formulations have been used in energy storage sizing problem, which might lead to significant differences in the resultant storage capacity decision, especially considering various wind ramp scenarios. In this paper, three different generator formulations with different time-coupled models are investigated and compared to evaluate their impact on storage sizing results given various wind scenarios. A case study is provided for comparison and verification. A detailed generator formulation is found to be able to model the time-coupled nature of generator operation behavior, offering reasonable energy storage sizing decision with wind ramp events.