Coordinated planning of mobile electric‑hydrogen energy storage for remote power system resilience enhancement

The remote power systems are characterized by unstable load demand, weak infrastructure, and strong constraint of natural environment. Vehicle-mounted mobile energy storage has strong flexibility in time and space dispatching, which has great potential to improve the remote power system resilience. However, electric energy storage vehicles rely heavily on the power system and the supporting capacity is limited. The service radius and duration of fuel-based energy storage vehicles also face challenges. A single mobile energy storage is difficult to balance the investment economy and emergency support capability. To improve the resilience of remote power systems, a coordinated pre-positioning and dispatching method of mobile electric‑hydrogen energy storage (MEHES) containing mobile electric energy storage vehicles (MESVs) and mobile hydrogen fuel cell power supply vehicles (MHSVs) is proposed. A remote power system operation model is established. To balance the investment economy and the emergency reserve requirement of hydrogen energy storage, a dynamic balance mode of hydrogen-blended natural gas is designed. A two-stage robust pre-positioning model is proposed to enhance the reliability of the MEHES deployment scheme. A dispatching and routing model including dispatching time constraints, dispatching space constraints, charging-discharging constraints and power output constraints is established under the pre-positioning scheme. The corresponding linearization and approximation methods are given. The results of case studies show that the proposed method can significantly improve the spatial dispatching efficiency of MEHES. The recovery rate improvement is 81.75 % higher than the non-optimized deployment scheme.