PDF(2019 KB)
Distributed Service Restoration Strategy for Interconnected Distribution Networks Based on Network Simplification and Topology Precomputation
CHAI Yuanyuan, MA Zechao, CHEN Haiwen, ZHANG Yuze, LI Qingsong
Electric Power Construction ›› 2026, Vol. 47 ›› Issue (10) : 15-29.
PDF(2019 KB)
PDF(2019 KB)
Distributed Service Restoration Strategy for Interconnected Distribution Networks Based on Network Simplification and Topology Precomputation
[Objective] In response to the risk of power outage in a single distribution network caused by main transformer fault， this paper proposes a distributed service restoration strategy for interconnected ADNs based on network simplification and topology precomputation.[Methods] First， this paper proposes a partitioning-based simplified modeling method for distribution networks based on boundary measurement data， and establishes a simplified network topology precomputation model that incorporates the tie line and feeder switches to predetermine the optimal states of tie line switches. Second， this paper constructs a global service restoration optimization model of interconnected distribution networks and proposes a distributed service restoration method based on the improved generalized Benders decomposition algorithm. The global optimization model is decomposed into main problem and sub-problem and then solved iteratively between the power outage and normal distribution networks to determine the optimal scheme of other controllable resources. Finally， simulation verification is conducted using two case studies of interconnected distribution networks of different sizes.[Results] In the two-interconnected and three-interconnected distribution network cases， the proposed distributed method converged in 12 and 17 iterations， respectively， achieving a 100% load restoration rate in both outaged networks. Compared with the centralized optimization method， the deviation rates of the global objective function value were approximately 0.1% and 0.02%， respectively. In the three-interconnected case， the computation time of the proposed method was 31.51s， which is significantly lower than the 575.32s of the centralized optimization method.[Conclusions] The proposed simplified topology precomputation method can accurately construct the simplified topology model of interconnected distribution networks and determine the optimal states of both internal and inter-network tie-line switches. When the scale of the interconnected distribution network increases， the distributed service restoration strategy based on the improved generalized Benders decomposition can still converge effectively and obtain a near-optimal restoration scheme that is essentially consistent with that of the centralized optimization method， thereby verifying the effectiveness and accuracy of the proposed method.
interconnected distribution networks / network simplification / distributed optimization / power supply restoration / generalized Benders decomposition algorithm
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利益冲突声明（Conflict of Interests）： 所有作者声明不存在利益冲突。
作者贡献声明（Authors' Contributions）： 柴园园提出研究方向，并构建研究框架与论文主体；马泽超负责主要程序编写，并撰写论文；陈海文负责论文内容润色修改；张昱泽参与算例分析验证；李青松负责文献调研和论文最终版本修订。所有作者均阅读并同意了论文终稿内容。
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