Method and device for determining cable state based on historical fault event

The invention provides a method and a device for determining a cable state based on historical fault events, and the method comprises the steps: carrying out the repeated recognition of fault causes of all historical fault events based on a DBSCAN clustering algorithm; predicting all the historical fault events to obtain a plurality of predicted fault current integrals and a plurality of predicted fault voltage minimum values, and predicting the predicted fault current integrals and the predicted fault voltage minimum values of all the repeated historical fault events by adopting a grey prediction algorithm to obtain a plurality of predicted fault current integrals and predicted fault voltage minimum values; the aging degree of the cable can be reflected by considering the dielectric loss sudden change value, the dielectric loss average value, the partial discharge increment and the total partial discharge amount, so that the accuracy of cable state evaluation is further improved; therefore, a problem of low