Wire defect detection method and device for power transmission line

The invention discloses a wire defect detection method and device for a power transmission line, and the method comprises the steps: obtaining an electromagnetic interference signal of the power transmission line, carrying out the spectrum analysis of the electromagnetic interference signal through a spectrum analyzer, and obtaining an electromagnetic interference value of the power transmission line, thereby achieving the detection of the defects of the power transmission line when the defects of line aging, strand breakage and the like occur in the power transmission line. According to the characteristic that the electromagnetic field around the power transmission conductor changes, defect detection is carried out by utilizing the electromagnetic field change of the power transmission conductor; and according to the target correlation between the conductor broken strand defect and the electromagnetic spectrum distribution, correlation analysis is carried out on the electromagnetic interference value to obta