Based on the actual operating data of wind power in Fujian, the probability distribution, correlation and chronological characteristics of wind power are studied. In addition, the effects of wind power on the synthesis load, power balance and peak load regulation of Fujian power grid in 2015 are discussed. It is found according to the practical output characteristics that the wind power has little effect on the annual maximum load, that is on the total capacity requirement of Fujian power system from the power balance point of view. However, it should be pointed out that more capacity requirement for peak load regulation will be brought about with the increase of the wind power and peakvalley difference of synthesis load.