Non-contact magnetic coupling electromagnetic wave injection high-voltage cable monitoring method

The invention relates to a non-contact magnetic coupling electromagnetic wave injection high-voltage cable monitoring method comprising the following steps: installing two inductive couplers on a cable, and realizing signal injection and measurement through the inductive couplers; the source end is connected with one inductive coupler by using a current injection probe, and the receiving end is connected with the other inductive coupler by using a current detection probe; an excitation signal is injected into the cable through a current injection probe, proper amplitude, frequency, bandwidth and sampling points are determined according to requirements, and a receiving end records a reflection signal through a current detection probe and transmits the reflection signal to a subsequent processing unit for analysis and evaluation; and the reference control group performs return loss measurement when the power cable to be measured has no fault, and is used for obtaining actual return loss and extracting fault inf