Adequacy evaluation of generating system recognizing random fuzzy wind speed

A new method based on fuzzy extension principle which can represent and propagate the possibilistic uncertainties of wind power in power system adequacy evaluation is proposed. In this method, wind speed is modeled as random fuzzy variable, and the corresponding system reliability indices are represented by fuzzy numbers instead of crisp values. Moreover, the relationship of different variables is recognized in this method. The paper illustrates the effectiveness of the approach by its application to IEEE Modified Reliability Test System.