A Pre-disaster Optimal Maintenance Strategy for Distribution Networks to Confront Severe Convective Weather Considering Post-disaster Situations

The increasingly frequent severe convective weather poses a serious threat to the reliability of distribution networks. In this regard, an optimal maintenance model that considers pre-disaster defense and post-disaster mitigation stages is proposed to meet the demand for resilience enhancement. During the pre-disaster defense stage, the equipment maintenance plan and the corresponding operation strategy are decided in conjunction with the failure probability of each device. During the post-disaster mitigation stage, the emergency dispatch strategy of the grid is developed considering the diversity of damage results. On these bases, the optimal pre-disaster maintenance strategy considering post-disaster situations is identified by integrating the two stages' outage losses and operating costs. Finally, the numerical results show that the proposed strategy can give an optimal maintenance plan by combining the fragility of each device, which effectively improves the outage prevention and management capability of the distribution network under severe convective weather.