Gale Change and Grading for Power Grid Wind Zone in Jiangsu Province

In this paper, the data of Jiangsu gale stations in lately 50 years is analyzed, and temporal-spatial variation characteristics of gale in this region is revealed. Firstly, type I extreme value distribution probability model is used to calculate the statistical wind speed values of the meteorological stations in Jiangsu Province and is completed maximum wind speed statistics of 30-year and 50-year return period for Jiangsu power grid. Then the grading standards of wind zone in Jiangsu power grid is also discussed for giving the wind-distribution map of power grid and its application principles and recommendations, so as to provide technical support for wind disaster prevention of overhead transmission lines of Jiangsu power grid.