Cable terminal insulation defect detection method based on meteorological information

The invention discloses a meteorological information-based cable terminal insulation defect detection method, which comprises the following two steps of: simulating defect discharge and non-defect discharge by using a partial discharge source, carrying out multiple discharge tests under different temperature and humidity conditions, and recording ultrahigh frequency signal amplitude data received by a sensor at the same time; forming a defect confidence database; and then inputting the actually measured ultrahigh frequency signal amplitude during discharge and real-time temperature and humidity information into the defect confidence database obtained in the step S1, matching the defect confidence at the local discharge source, and setting a threshold value to judge whether the defect is processed or not. According to the cable terminal insulation defect detection method based on meteorological information, temperature and humidity data in the environment are added in addition to ultrahigh frequency partial di