电力网络中，进行节点优化。按照增加的出线数最少者优先编号，并进行试消元，然后重复这个过程。动态优化是引入注入元最少的一种节点编号优化方法。-Electricity network, the node optimization. Qualifying number of least priority in accordance with the increase in number, and try elimination, and then repeat the process. The dyn