The invention discloses a fault identification early warning method and
system for a
power transmission line, and the method comprises the steps: receiving a fault flashover
signal, determining a generation region of the fault flashover
signal, and obtaining a target image; determining whether the
power transmission line in the occurrence area has
abnormal discharge or not; if yes, performing image recognition to obtain a to-be-detected fault source; obtaining a
tower gradient, an
electromagnetic field and a
radar change of a
tower area in the occurrence area; determining a motion path of a current fault source, determining the type of the fault source through image snapshot, and determining a target fault source; obtaining meteorological data through a micro-meteorological sensor and network meteorological weather, and obtaining future and real-time galloping swing and galloping frequency of the
power transmission line; and starting image snapshot to determine a target probability and an image of a secondary fault caused by a target fault source on the power
transmission line by combining a galloping amplitude, a galloping frequency, a tree barrier, an ultrahigh
engineering vehicle, a floating object, a
lightning stroke and a value greater than an early warning value, determining a high-risk interval section, and sending an early warning picture and a video to a background in real time.