Power System Transient Stability Optimal Design And Its Implementation Based On Nonlinear Interior Point Algorithm

To ensure that system can maintain synchronous following a major disturbance is very important for power system secure operating. Recent years, with the development of new technologies, such as the direct method of transient stability analysis and stability control approach based on PMU, online stability assessment and stability control measures has been improved greatly. However, although these post-contingency strategies have a good reason to be adequately considerate, a primal robust stable operating point is still the fundament of stability problems. Especially in the forthcoming deregulation environment, conventional stability calculation program become out of time in that it ignores the economic demand of power system operating. For example, since different operating points of power system have different stability characteristics, utility engineers often perform a large number of stability studies to search for a stable one by trial-and-error methodsincorporating engineering experience. Obviously, this method is quite time-consuming and imprecise, saying nothing of economy.In order to overcome the difficulty, this paper presents a transient stability optimal design modal through integrating stability constraints into the standard OPF formulation. The new modal not only can eliminate the need for repeated simulation to determine a transiently secure operating point, but also can guarantee its optimality. A methodology based on direct interior point method for nonlinear programming is introduced to solve this problem. Simulation results on the IEEE 17 generators system with 162 buses and Guangxi 36 generators system with 98 buses of China have demonstrated the effectiveness of the presented modal and the efficiency of the proposed calculation methodology.