The uncertainty and its influence of wind generated power on power system transient stability under different penetration

Wind gust has the characteristics of sudden and brief increase in wind speed. Moreover, if the penetration of wind power is high, its inherent characteristics may impacts on power system stability. In order to analyze the impacts of wind gust and wind penetration on wind turbine generator further the system stability, three signals to stand for wind gust types are adopted in this paper, i.e. lope signal, 1-consine discrete signal and step signal. This paper analyzes quantitatively the uncertainties of wind generated power arising from wind speed using different wind models. Then, two-area four-machine system is modified in MATLAB, where the double-fed induction wind generators are used to simulate different wind power penetration. It is shown that different types of wind models and variations wind speed have different impacts on the generated wind power of wind farm. Moreover, it can be inferred when the penetration of wind power is high, the generated wind power outputs affect power system stability largely.