Two-Stage Resilience Enhancement Strategy for Distribution Networks Considering MESS-RC-Network Reconfiguration Coordinated Restoration Under Extreme Weather
This study addresses the escalating frequency of extreme weather events that compromise power system resilience by proposing a two-stage resilience enhancement strategy integrating mobile energy storage systems (MESS), repair crews (RC), and distribution network reconfiguration. In the pre-disaster stage, an improved Rankine wind field model combined with line wind resistance strength calculates time-varying failure probabilities of distribution lines. A Frank-Copula function predicts regional correlated wind-solar output scenarios, and a bi-level three-stage robust optimization model incorporating renewable uncertainty determines optimal MESS pre-deployment locations. In the during-disaster stage, a multi-source coordinated restoration model minimizes weighted load curtailment power, dynamically scheduling MESS for emergency supply, dispatching RC for line repair, and reconfiguring network topology. Validation on modified IEEE 33-node and 47-node transportation topologies demonstrates the strategy's effectiveness. The proposed resilience metric R integrates graded load loss costs with penalty coefficients ε1, ε2, ε3 for primary, secondary, and tertiary loads. Experimental parameters include MESS units with 120 kW and 160 kW charge/discharge power, 500 kWh and 600 kWh rated capacities, 0.95 efficiency, and SOC limits of 0.1–0.9. Dispatch costs are 30 CNY/km for MESS movement, 10 CNY/kW for charge/discharge, 20 CNY/kW for DEG discharge, 50 CNY per switch action, and 1000 CNY/h for repair crew. The strategy achieves minimized load curtailment and enhanced economic resilience under typhoon-induced failures.