Capacitive current transformer insulation defect monitoring method based on wide-area synchronous time service

The invention discloses a capacitive current transformer insulation defect monitoring method based on wide-area synchronous time service. The method comprises the following steps of: performing synchronous time service on monitoring units in a wide-area environment by a main control terminal, transmitting a synchronous instruction to each monitoring unit through wireless communication, and finishing time synchronization of the main control terminal and all the monitoring units; and making the main control terminal analyze the received data, processing current data acquired at the same time according to timestamp information, calculating relative dielectric loss factors, and comparing the relative dielectric loss factors, thereby completing judgement on the insulation defects of equipment and positioning of the equipment with insulation defects. With the method of the invention adopted, the reliability of a detection result is greatly improved for the insulation defect of a capacitive current transformer, and