跨区资源共享的多区域电 - 氢综合能源系统灾后恢复策略

Hydrogen energy system, with its inter temporal and spatial transfer characteristics, shows greatpotential for enhancing the resilience of distribution grids. However, few literatures have considered the intertemporal and spatial flexibility of hydrogen energy system and the inter-regional support capability of mobileemergency resources, and the post-disaster collaborative recovery mechanism of multi-region electric-hydrogenintegrated energy system (MR-EH-IES) is still unclear, which makes it difficult to exploit the inter-regional supportpotential of mobile resilience resources. Aiming at the above problems, this paper proposes a post-disaster recoverystrategy for MR-EH-IES with cross-regional resource sharing.

This paper firstly proposes a two-layer MR-EH-IES disaster recovery framework based on the idea of  “intraregional autonomy, resource integration, inter-regional sharing”.  In the lower layer, the electric-hydrogenintegrated energy system (EH-IES) carries out intra-zone autonomy. The potential of synergistic cooperation between mobile electric energy storage, hydrogen fuel power generation vehicles, maintenance personnel andhydrogen energy system in disaster recovery is fully considered, and the EH-IES disaster recovery modelconsidering the synergistic scheduling of distributed power sources and maintenance personnel is established. Atthe upper level, the joint disaster resilience center carries out the coordinated allocation of mobile resilienceresource (MRR). Starting from the disaster recovery mechanism of different types of MRR, the key factorsaffecting its allocation are analyzed, the MRR disaster recovery mechanism considering cross-region support isproposed, and the MRR disaster allocation model considering cross-region resource sharing is established. Then, based on the above framework and strategy, the MR-EH-IES two-layer disaster recovery model considering cross-region resource sharing is proposed.

The simulation analysis shows that the total cut-load loss of MR-EH-IES decreases by 22.4% after consideringcross-region resource sharing, in which the cut-load loss of region 1 and region 3 increases slightly by ¥1.3×10³and ¥7.3×10³, respectively, while the cut-load loss of region 2 and region 4 decreases by ¥157.8×10³ and ¥62.5×10³, respectively. Specifically, in the early stage of disaster recovery, when the mobile power supply leftfrom region 1 and region 3 to support region 2 and region 4, the weighted load recovery rate of region 1 and region 3 showed a short drop, with the maximum drop of 0.5% and 1.1%, respectively, but both of them were higher thanthe weighted proportion of important loads. Meanwhile, the load-weighted recovery rates of region 2 and region 4 increased significantly, with maximum enhancements of 11.0% and 4.2%, respectively. In addition, when region 1and region 3 were restored, idle mobile power supplies and maintenance personnel were the first to support otherregions.

The following conclusions can be drawn from the simulation analysis: (1) The post-disaster recovery strategyproposed in this paper is able to rapidly restore the supply of important loads and reduce the system damage in theearly stage of disaster recovery through the reasonable allocation of mobile emergency resources, and improve theutilization rate of mobile emergency resources in the later stage of disaster recovery. (2) The inter temporal andspatial flexibility of the hydrogen system and the long tube trailer can increase the energy transfer channels ofMR-EH-IES in time and space scales, giving full play to the ability of hydrogen energy system to support thepower grid in disaster recovery.