Extra-high voltage converter transformer fault signal simulation test platform

The invention belongs to the field of converter transformers, and relates to an extra-high voltage converter transformer fault signal simulation test platform which comprises a simulation test oil tank, a high-voltage simulation test sleeve, a low-voltage simulation test sleeve and a fault defect simulation test device. The fault defect simulation test device comprises a voltage-sharing ball to-ground discharge, air gap discharge defect and suspension electrode defect simulation test device installed on an adjustable stroke device, a simulation test ascending flanged base is installed on the upper portion of a simulation test oil tank, a wire outlet device is installed in the simulation test ascending flanged base, and a high-voltage electrode is installed in the middle of the simulation test oil tank. One end of the simulation test oil tank is provided with a low-voltage simulation test sleeve which is electrically connected with the low-voltage electrode; on-line monitoring equipment and a partial discharge