Collaborative Optimization Configuration of Shared Energy Storage and Transmission Lines Considering Multi-time Scale Demand

Collaborative optimization configuration of shared energy storage (SES) and transmission lines can satisfy the multi-timescale power balancing demand of high percentage new energy grids while delaying transmission lines expansion and saving cost. A bi-level collaborative optimization configuration model of SES and transmission lines which considers multi-timescale demand is proposed to improve the economics of collaborative configuration. Firstly, the collaborative optimization configuration of SES and transmission lines consider the multi-timescale power balancing demand of high percentage new energy grids. Secondly, a bi-level collaborative optimization configuration model of SES and transmission lines is established. The upper level model aims to minimize the total cost of SES investment and transmission lines expansion to realize the investment decision of SES and transmission lines. The lower level model is based on upper level investment planning scheme and multi-timescale demand, aiming to minimize the integrated system operation cost for optimizing the SES charging and discharging strategies. Finally, the validity of the model is verified by simulation using the improved IEEE RTS24-Bus system.