Traditional manual preparation of accident plans cannot cover all accidents. The preparation process is insufficient in intelligence and automation. This paper designs and develops an anticipated accident plan simulation system for a bulk power system. Given a bulk power grid accident plan, this paper adopts analysis methods of power network operation mode, sensitivity, topology and power network risks, combining the simulation function of DTS, to form accident plans automatically. These cover the operational mode before the accident, the accident situation, operational mode after the accident, an emergency control plan, a risk pre-control plan and an equipment recovery plan. The application shows that the system can generate accident plans containing specific control measures for flexible operation modes and faults, such that it has better practicability. This work is supported by the Science and Technology Project of State Grid Corporation of China (No. 5211UZ18006K) “Research and Application of Key Technologies of Large Power Grid Pre-scheduling”.