Internal insulation detection system for high-voltage equipment provided with porcelain bushing

The invention discloses an internal insulation detection system for high-voltage equipment provided with a porcelain bushing and relates to the technical field of the internal insulation technique for high-voltage equipment. The system can remotely detect whether double/multiple sections of high-voltage equipment provided with a porcelain bushing are good in insulating property or not in the online manner. The system comprises a detection table, a controller and a high-voltage discharge sound detection sensor used for detecting high-voltage discharge sounds. A porcelain bushing at a flange is tightly connected with an insulation support in a sleeved mode. A metal ring which is arranged at an interval from the porcelain bushing is fixedly arranged on the insulation support. The ring center of the metal ring falls on the axis of the porcelain bushing. An annular porcelain convex edge is arranged on the outer ring of the porcelain bushing. A porcelain ring is arranged on the annular porcelain convex edge. The po