The invention discloses a middle and
low voltage distribution network cooperative regulation and control method and device based on reliability evaluation, and belongs to the technical field of power
system optimization. According to the method, a zone area in the low-
voltage power distribution network is projected into a feasible space to obtain a feasible region, flexible resources such as distributed photovoltaic,
electric heating loads and distributed
energy storage of the zone area of the low-
voltage power distribution network are projected and aggregated into constraint conditions of virtual load nodes in the medium-
voltage power distribution network, and a medium-voltage power distribution
network model and a corresponding objective function are constructed based on the constraint conditions. And obtaining a switching action sequence corresponding to the medium-voltage power distribution network after solving the objective function. According to the method, a medium and
low voltage power distribution network cooperative reliability improvement strategy considering the virtual load nodes is provided, all flexible resources of a
low voltage power distribution network zone area are represented through the virtual load nodes, and the variable dimension and the calculation complexity of medium and low voltage power distribution network reliability evaluation are reduced; the linkage between the flexible resources of the
transformer area and the medium-voltage power distribution
network switch is realized, and the reliability of the medium-low voltage power distribution network is effectively improved.