Pulse wave velocity correction method for partial discharge monitoring of high-voltage cable

The invention discloses a pulse wave velocity correction method for partial discharge monitoring of a high-voltage cable, and the method comprises the steps: firstly injecting a coupling pulse into agrounding connector of a three-phase cable in a current grounding box based on electromagnetic coupling, and then collecting the coupling pulse at the grounding connector of the three-phase cable in an adjacent grounding box of the current grounding box; calculating the pulse wave velocity according to the length of the cable and the coupling pulse transmission time, fitting the load of the three-phase cable and the coefficient of the pulse wave velocity to the wave velocity load curve, and finally correcting the pulse wave velocity under the real-time load through the fitted wave velocity load curve to obtain the corrected pulse wave velocity. The correction pulse wave velocity is used for partial discharge positioning, so that the positioning result is more accurate. The pulse wave velocity can be accurately cor