Power grid fault determination method and device, and computer readable storage medium

The invention discloses a power grid fault determination method and device and a computer readable storage medium. The method comprises the steps that a characteristic information set of a power grid is acquired, and the characteristic information set at least comprises a voltage disturbance waveform sample and a current disturbance waveform sample; an optimal feature set is obtained based on the feature information set, and the optimal feature set is a feature set obtained after transformation and extraction of the voltage disturbance waveform sample and the current disturbance waveform sample; processing the optimal feature set through a cross validation method to obtain a target model; and on the basis of a test set, a fault identification result is obtained by using the target model, and the test set is a test data set which is segmented from the optimal feature set and is used for obtaining the fault identification result. According to the invention, the technical problem of lack of predictability in jud