Increasing wind power penetration level based on hybrid wind and Photovoltaic generation

Wind power generation have attracted great concentration in the last decade due to its clean and renewable characteristics. In this research, solar Photovoltaic(PV) power is utilized to compensate the active power imbalances of wind farm installed in Western Gansu Province, because of the rich solar and wind energy in that area. Firstly, Weibull and Beta distribution are introduced to simulate the wind speed and solar irradiance fluctuations separately, during a certain period of time. Then wind and PV power generation is calculated on a stochastic basis during that period of time in the same region. The impact of joint stochastic properties of wind and solar power generation on power system voltage is analyzed, based on the probabilistic load flow approach using nodal cumulants. Finally, an increased wind power penetration level is verified through simulations on IEEE-24 bus test system, by comparing the probabilities of bus voltages which violate their operation limits.