A method for constructing a predictive model of a change of state of an electrical distribution network, the electrical distribution network including a node supplying power to loads connected by way of a distribution line, the method including: a. a step of measuring the variation, during a first time period, of a physical quantity A at the main node, and of a physical quantity B at measuring points of the network; and b. a step of correlating the quantity A and the quantity B measured in step a., so that knowledge of the physical quantity A at the main node allows the value of the physical quantity B at the plurality of measuring points of the network to be predicted.