Abstract: Renewable energy, especially wind energy, has developed rapidly in recent years, which will substitute the conventional fossil fuel energy. The impacts of wind power on power system become more and more evident with the increasing percentage of wind power in power systems. The stochastic and intermittent properties of wind energy cause the wind power fluctuation, which further impact system frequency. In this paper, the current research on the impacts of wind power on power systems are reviewed from following two aspects, the fluctuation of wind power and the particularity of equipments of wind generation. Based on this, the detail approaches for regulating system frequency, mainly primary and secondary frequency regulation, are concluded.