极端天气的侵袭严重威胁到我国配电网安全稳定运行，而主动配电网技术的发展为增强配电网抗极端天气弹性提供了新手段。本项目将深入研究极端天气下多阶段主动配电网弹性评估与提升方法。首先，依据极端天气气象信息，分析其时空演变趋势，建立主动配电网线路故障时空特性数学解析模型；其次，构建考虑极端天气影响的主动配电网弹性指标体系，提出一种适用于极端天气情形的主动配电网弹性评估方法，用于评估灾前和灾后两阶段不同弹性提升策略的优劣；在灾前防御阶段，构建考虑主动配电网弹性提升的线路加固与电源布置决策模型，并研究其高效求解技术，给出灾前线路加固和分布式电源布置最优方案；在灾后恢复阶段，建立考虑主动配电网弹性提升的负荷恢复与孤岛运行决策模型，研究模型近似等效方法并求解，给出灾后负荷恢复和孤岛运行最优方案。期望本项目能为我国主动配电网提供抵御极端天气的新方法和新思路，实现极端天气下多阶段主动配电网弹性提升的科学决策。

Extreme weather events threaten the security and stability of distribution system operation in China. The development of active distribution system (ADS) provides new means to enhance the resilience of the distribution system against the extreme weather events. This proposal will deeply study the multi-stage resilience evaluation and enhancement of the ADS against the extreme weather events. Firstly, based on the extreme weather information, its spatial-temporal evolution trend will be analyzed, and then a spatial-temporal mathematic distribution line failure model for the ADS will be established. Next, the resilience evaluation index system against extreme weather events for ADS will be constructed to evaluate the effects of the resilience enhancement strategies in pre-disaster stage and the post-disaster stage. In the pre-disaster defense stage, an optimal line hardening and distributed generator siting model for ADS resilience enhancement will be built providing line hardening and distributed generator layout strategy, and the rapid solution method will be studied. In the post-disaster restoration stage, the ADS optimal operation model considering the resilience enhancement will be established and the optimal strategy of the post-disaster load restoration and system island operation will be given. It is expected that this proposal will provide new methods and ideas for the ADS to enhance its resilience against extreme weather events in China and realize the scientific decision-making of multi-stage resilience enhancement of the ADS against the extreme weather events.