System stability study is the important parameter of economic, transient reliable and secure power system planning and operation. The fault is created on different transient stability is analyzed for different load and generation condition.The load flow study will perform to determine prefault condition in the system using Newton-Raphson method with the help of three phase balanced fault, the variations in power angle and frequency of the system will be studied. In this paper trasient stability analysis of nine bus system will perform using power world simulator.