Optimal selection method and system for power grid engineering scheme

The invention provides a power grid engineering scheme optimization method and system. The method comprises the steps of calculating an influence index value of each power grid engineering scheme based on obtained information of all power grid engineering schemes; calculating the cost of each power grid project scheme based on the information of each power grid project scheme and predetermined key influence indexes influencing the project cost in combination with a pre-constructed cost evaluation model; determining an optimal power grid engineering scheme based on the influence index value of each power grid engineering scheme and the cost of the power grid engineering scheme; wherein the cost evaluation model is constructed on the basis of a pre-trained PSO-SVM model and a pre-trained PSO-BP neural network model according to a weight obtained through calculation according to a prediction error standard deviation. According to the method, the optimal scheme is determined by adopting the image index value and