中文摘要：

提出一种配电网重构的快速算法。基于网络简化给出了“元环”的概念，并结合辐射型配电网节点阻抗矩阵元素的特点和负荷与支路有功损耗的定量关系，证明了元环为配电网重构的最小可行分析对象。在此基础上，构造了反映负荷在元环路径上引起有功损耗大小的负荷耗散分量和路径耗散因子，并通过分析路径耗散因子的性质给出一种新的支路交换启发式规则，进而提出一种改进的支路交换算法：先由开断开关两端节点的负荷耗散分量之差确定网络中元环的处理次序，再依据新的启发式规则确定各元环中应断开的支路，这样反复操作即得配电网重构的最优方案。IEEE69节点配电系统的仿真分析表明，所提方法得到最优重构方案的速度快且可靠，能够应用到复杂配电网络重构。

英文摘要：

A fast algorithm for distribution network reconfiguration was presented. The conception of basic loop was presented based on network simplification. By combining the characteristics of the nodal impedance matrix of the radial distribution network and the quantitative relationship between load and branch power loss, it was verified that the basic loop was just the minimum feasible analysis unit of the physical reconfiguration optimization. Based on this conclusion, load dissipation component and path dissipation factor were constructed to reflect the power loss in a basic loop, and then a novel heuristic rules and an improved branch-exchange method were formed by analysis the properties of the path dissipation factor. In the improved method, the processing sequence of all the basic loops was firstly defined by the load dissipation component of the disconnecting switch in each basic loop, and then the alternative disconnecting branch was determined in the processing basic loop based on the new heuristic rules which can help to get a better solution. Optimal reconfiguration scheme is simply obtained by repeating the above operation until there was no branch need to exchange. The simulation results of IEEE 69 buses system show that the proposed method produces the optimal reconfiguration scheme quickly and reliably, and can be applied to complex distribution network reconfiguration.