基于降低网络损耗的配电网重构

在传统遗传算法的基础上,充分利用配电网的特点,将配电网分解为一系列的“环路”,提出了一种基于环路的快速遗传算法,有效提高了收敛速度,避免了不成熟收敛,同时避免了“维数灾”问题;提出用支路的开关状态（0或1）作为控制参数,在染色体编码时仅仅涉及环路上的电源点和T节点之外的点,因此大大缩短了染色体的长度,同时在种群生成、交叉和变异过程中,采用孤岛和闭环消除手法使得正常环数总等于配电网的环路个数,因此得到的均是种群中的可行解,从而大大减少了搜索空间,有利于提高计算速度.最后将此法用于网络重构中,通过24节点算例验证,此方法是可行的、高效的,极大提高了计算效率.

Reconfiguration of Distribution Network Based on Power Loss Reduction

Based on traditional genetic algorithm,makes good use of the character of distribution networks,and docompose them into a series of "loops",this article extracte an improved genetic algorithms based loops,which can improve the speed of convergence and avoid premature convergence and "dimension disaster" problem ;The statues of each switch in distribution networks is naturally represented by a control parameter 0 or 1,only relate exclusive of source point and T node on loops during chromosome encode,so the length of string is much shorter than those proposed by others.During the procedure of population formation ,crossover and mutation,this paper adopt a method of lone island and eliminated closed loops,which makes the total of normal loops equal to that of distribution networks.In this way we can get feasible solution,the space of hunting is also greatly reduced,and the speed of calculation is improved.The example of 24 nodes in this article certifies the method is feasible and high efficient.