Modeling and Optimal Operation of Mobile Energy Storage Units Considering the Operation Safety of the Distribution Networks
Shichuan Chen, Weiming Chen, Jianli Lin, Luyao Chen · 2024
Amid the global energy transition and climate change, the increasing integration of distributed wind and photovoltaic power generation presents significant challenges to power systems. Mobile energy storage technology can increase renewable energy consumption by altering the load demand on the distribution grids, while also refining the stability and reliability of the distribution networks. This paper proposes an optimized operation strategy for mobile energy storage units, considering the load regulation capability of the distribution networks. By analyzing the load regulation capabilities and characteristics of mobile energy storage units, a comprehensive operational framework is constructed. Additionally, a physical model for mobile energy storage that accounts for mobility constraints is developed. The dispatch center is dedicated to curtailing the operational expense of the distribution power network by devising an optimization problem grounded in the principles of optimal power flow. This framework is subsequently reformulated into a mixed-integer second-order cone optimization problem. The IEEE33-node based simulation outcomes demonstrate that mobile energy storage can alleviate grid congestion, reduce network losses, and enhance the integration and utilization of renewable sources.