Power-supply power grid comprehensive optimization method

The invention relates to a power-supply power grid comprehensive optimization method which comprises the following steps that a power-supply power grid comprehensive optimization system is established, a data collecting module collects original data in a planning area, and primary optimization is carried out on the voltage class of the original data; an optimization scheme generating module generates M power-supply power grid comprehensive optimization schemes according to a primary optimization result and the original data by utilizing a genetic algorithm; an objective function establishing module establishes an objective function according to the optimization schemes and gives out corresponding constraint conditions; an objective function calculating module judges the M optimization schemes according to the constraint conditions to obtain one optimization scheme meeting the constraint conditions, and calculates the objective function of the optimization scheme; a power interruption cost calculating module calculates power interruption cost of the scheme meeting the constraint conditions; according to a received objective function calculating result and the power interruption cost, the optimization scheme generating module carries out optimization processing on the optimization scheme meeting the constraint conditions by adopting the genetic algorithm and generates and outputs the power-supply power grid comprehensive optimization scheme with the lowest generation cost.