Stability Study of Power System

The theory of power system stability, necessary of power system stability and different methods for analysis of power system stability has been developed in this paper. The objective of this paper is to investigate and understand the stability of power system, with the main focus on stability theories and power system modeling. The paper first explained the definition of power system stability and the need for power system stability studies. Next the paper examined the concept of system stability and some stability theories. The paper then performed a power system modeling and simulation of a two-machine, three bus power systems. The performance of the power system was simulated. The operating points and system parameters were varied to test the robustness of the power system. From various stability systems, in this paper, only transient analysis is studied. Examples of the parameters that were varied include the fault position λ, the power angle δ and the mechanical power input . A software using MATLAB has been developed for this purpose. Finally we compare various stability responses by varying power angle, fault position and mechanical power.