The relationship between structural form of ultra-high voltage(UHV)power grid and power source in the future are analyzed based on the current distribution characteristics of power and load in China and the prospective change of power source composition. Further

the adaptability and security of different structural forms of UHV power grid in the future of China are discussed. Then

the UHV power grid structural forms in the transition period of 2030 and the prospect period of 2050 in China are prospected by combining with the continuous increase of China's intermittent power supply and the development trend of Energy Internet. As followed

the severe challenges for the safe operation of ultra-high voltage direct current(UHVDC)power grid in the future are pointed out

and the variation trend and key technical issues of UHV power grid structural forms in China are illustrated.