Voltage Collapse Study of Power System under Load Shedding Point

The phenomenon of overloading has become a serious threat to the reliability of power delivery, especially in operating sectors of electrical power networks it leads to voltage collapses. Therefore, adjusting the link between voltage stability and loading need a clear indicator. In this paper a simplified method of presenting the voltage stability margin as a tool to assign the maximum loading of every loading node in the power network. The proposed method is based only on network data and bus voltage magnitude measurement. Considerable results of maximum loading edges are obtained where the weakest node of the power network is also indicated. To improve the voltage stability margin, a wind power generator (Doubly Fed Induction Generator - DFIG) is injected at the weakest node in the electric grid (11-Bus test system). As a result, when a wind power generator (DFIG) is used, the system voltages will improve, losses will decrease, and the system's ability to withstand the overload will increase.