The ultra-high voltage AC withstand voltage test vehicle (invention patent ZL201110196455.1) developed by Suzhou Huadian to meet the field test of UHV substation is the core equipment of the Hubei Electric Power Research Institute "800kV High Voltage Switchgear Insulation Test Platform R&D and Application" project Used in multiple UHV substations, this technology project won the second prize of 2013 National Grid Science and Technology Progress Award.