Method for quickly obtaining critical pollution flashover voltage of power transmission line composite insulator

The invention discloses a method for quickly collecting critical flashover voltage of a composite insulator of a power transmission line, which comprises the following steps of: firstly, selecting various composite insulators commonly used by a contact network as research objects, and establishing a method model for quickly collecting the critical flashover voltage of the composite insulator of the power transmission line; the architecture of the method model is based on an optimized BP neural network of an improved biogeography algorithm. According to the method, a large amount of test data is obtained through an artificial pollution test, and modeling is performed on the relationship among the critical pollution flashover voltage, the equivalent salt deposit density and the parameters ofthe insulator of the contact network composite insulator by using a method of optimizing a BP neural network through a CS-BBO algorithm. And a composite insulator critical pollution flashover voltageprediction model is estab