Abstract:With the increasing penetration of power electronic devices and distributed generation (DG) in distribution networks, existing fault recovery schemes fail to fully utilize the short-term overload capability of soft open points (SOPs) and the ramping support of DGs, leading to insufficient resource utilization. To address this issue, this paper proposes a multi-period fault recovery method for active distribution networks, incorporating SOP short-term overload capability and DG ramping capability. First, the operating principle of SOPs is described, and its mathematical model with short-term overload capability is formulated. Then, the post-fault ramping behavior of DGs is analyzed, and a corresponding mathematical model for DG participation in fault recovery is developed. Based on these models, a multi-period fault recovery optimization framework is established, in which the dynamic coordination between SOPs and DGs is explicitly characterized, and a corresponding recovery procedure is developed. Case studies on the IEEE 33-node system verify that the proposed method can significantly enhance fault recovery capability of distribution networks, proving its effectiveness.