中文摘要：

大规模配网重构问题的非线性组合优化特点对计算方法的效率造成了极大困难。该文应用交流支路电气剖分方法，由负荷受电剖分路径电气距离指标构造一种新的物理寻优方法。该方法在合环操作形成的闭环中根据电气距离为负荷分配供电路径，从而确定应断开的支路，使损耗降到最低。同时，根据定义的单位功耗以及物理规则确定需计算电气距离的负荷节点以减少运算量，并通过优化待处理分段开关的顺序以保证能寻找到更优良的解。由于算法属于物理寻优方式，避免了不收敛或者难收敛的情况。IEEE69系统分析表明，算法具有快速求得优良解的特性，能够应用到大型配电网络重构问题。

英文摘要：

In the optimization of the large-scale distribution network reconfiguration, high computation efficiency is hard to be acquired because of the problem＇s nonlinearity. AC branch electrical dissection is applied to set up a new method which optimizes the reconfiguration physically by electrical distances of load electrical dissection path. In the loop formed with the closing operation of switch, load power supply path is allocated and the disconnecting branch is chosen based on electrical distances of dissected paths for load, which can minimize the losses. Meanwhile, load buses needed to get their electrical distances are determined by unit losses and physical rules, and which needs less computation; the processing sequence of switches is optimized, and which can help to get a better solution. The proposed method is of physical optimization, and it avoids the bad convergence of other optimization methods. A reconfiguration case based on IEEE 69 buses system is provided, and it shows that the proposed method can find a fine solution quickly, and can be applied to the configuration of large distribution networks.