Abstract:In recent years, the frequent occurrence of extreme external disasters such as typhoons, mountain fires, ice cover and rainstorms has become a major threat to the safe and stable operation of power system. Network-wide situation awareness, online decision-making and integrated collaborative prevention and control are urgently needed. Based on the "double carbon" energy transformation and the new situation of power system construction, the new features of extreme external disasters and their impacts on power grid are described, the extreme external disaster prevention system based on information flow in decision-making process is constructed, and the resources planning is put forward to expand power line to the system level and equipment level. Finally, the development direction of active defense technology for extreme external disasters in power system is prospected.