断面是电网的薄弱环节,而断面的识别通常需要大量人工计算,针对此局限,提出了基于鸡群优化算法的断面传输极限的自动搜索断面法,首先利用Dijkstra算法对电网进行分区,将各区域之间的联络线作为初始断面,再根据支路开断分布系数与潮流方向从初始断面中识别出输电断面,在计算输电断面的热稳定极限时,通过功率灵敏度得到各发电机出力对线路功率的控制,以断面在正常运行状况下所能传输的最大功率为目标函数,以断面各线路依次为目标线路,控制发电机的出力,满足全网线路热稳定以及发电机出力约束,通过鸡群优化算法得到断面各目标线路最大传输功率极限,最后取各目标线路传输极限中的最小值为断面传输极限,从而得到关键断面.在IEEE 39节点系统中验证了所提方法的有效性.%The section is the weak link of the power grid,and the section recognition usually requires a lot of manual calculation,for this limitation,this paper puts forward the automatic search method of section transmission limit based on chicken swarm optimization algorithm.The Dijkstra algorithm is firstly used to the partition of the power grid,the contact line between regions as the initial section,according to the OTDF,the distribution coefficient and the flow direction of the transmission section are organized from the initial section.In the calculation of the thermal stability limits of transmission section,the power sensitivity matrix based on the generator output power control circuit,maximum power in section under normal operation can transfer as objective function,the section of each line followed by the target on line,the output of generator as control variables,to meet the whole network line thermal stability constraint and the generator,through the optimization method to get off the chickens.At the same time,the maximum transmission power limit of each target line is obtained,and the minimum value of the transmission limit of each target line is taken as the transmission limit of section,so that the critical section is obtained.The effectiveness of the proposed method is verified in the IEEE 39 node system.
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