Active power distribution network multi-stage extension planning method considering voltage regulation equipment deployment

The invention relates to an active power distribution network multi-stage extension planning method considering voltage regulation equipment deployment, and belongs to the technical field of power system planning. According to the technical scheme, an optimal planning scheme is obtained through solution of a multi-stage expansion planning model of the active power distribution network, and the overvoltage problem caused by DG and underground cable ground capacitance in the power distribution network is effectively solved. The method has the beneficial effects that minimization of investment and operation cost of the whole planning cycle is taken as a target function, the capacity improvement of a distribution transformer of a transformer substation, the upgrading and reconstruction/new construction of a cable line, the installation of a voltage regulator and an SVG and the determination of a connection point of a DG are considered in a planning model, and finally a planning scheme with both economical efficie