Layered step-by-step collaborative flexible control method, system and equipment for voltage of power distribution network

The invention relates to the technical field of power distribution network voltage control, in particular to a power distribution network voltage layering step-by-step cooperative flexible control method, system and equipment, and the method comprises the steps: collecting the voltage information of a low-voltage transformer area user, and calculating the voltage information of the low-voltage transformer area user through a pre-established voltage section quality model, the low-voltage side voltage section quality is obtained; according to a plurality of pre-divided voltage fluctuation partitions, determining a voltage fluctuation partition to which the low-voltage side voltage section quality belongs; selecting a corresponding target control strategy from preset collaborative flexible control strategies according to the voltage fluctuation partition; and based on the target control strategy, carrying out coordination control on the on-load voltage regulating transformer and the hybrid distribution transform