Abstract: For the fluctuation and time variability of distributed generation and load,and the general unbalanced operation as well,a reconfiguration method for active distribution network is proposed.Firstly,short-term prediction models of wind power,photovoltaic power and load power are built on the day before reconfiguration.In order to minimize the impact on the operation of the distribution network,a daily reconfiguration decision which takes one day as switching action cycle is proposed.On the basis of that,a mathematical model for multi-period dynamic reconfiguration for three phase unbalanced active distribution network is established,which aims at the minimum daily loss of the distribution network and voltage deviation.Moreover,the original non-convex model is linearly relaxed based on the premise-controlled optimal equidistant piecewise linear approximation algorithm.Finally,the effectiveness and accuracy of the reconfiguration model are verified by standardized distribution networks test system.