Multi-stage voltage control method for distributed photovoltaic participated distribution network reactive power optimization

The invention belongs to the technical field of power system optimization control, and discloses a multi-stage voltage control method for reactive power optimization of a distributed photovoltaic participation distribution network, and the method comprises the steps: building a mathematical model for the reactive power optimization of the distributed photovoltaic participation distribution network; solving the reactive power optimization mathematical model of the power distribution network by using a linear decline weight particle swarm algorithm to obtain the optimal reactive power output of each distributed photovoltaic in the power distribution network; according to the reactive power demand of the system for the distributed photovoltaic, the distributed photovoltaic adopts a multi-stage voltage response control method to provide reactive power, and voltage control is carried out on the system. According to the reactive power optimization control method, distributed photovoltaic is brought into the reactiv