Power System Transient Stability Considering Wind Power Generation and System Net-Load

Increasing the integration of wind power generators (WPGs) can have a positive or negative impact on the transient stability of power systems. In this study, the transient stability of a power system integrating WPGs is assessed. The power produced by the WPGs is modelled using wind speed measured from three South African sites. The Weibull cumulative distribution function (CDF) is used to convert the wind speed to wind power. Three system loading conditions consisting of low, moderate, and peak demand are assessed. The probabilistic method is used to assess power system transient stability. Five thousand (5000) system operating scenarios are developed by varying the power produced by the WPGs during each of the three loading conditions. Three-phase faults are applied sequentially on power system lines and cleared using a 100 ms fault clearing time. Simulation results show that when the system net-load which is the difference between the total power produced by the WPGs and the system loading is low, the system operates closer to transient instability than when the system net-load is higher.