面向深远海风电机组抗台设计的浙江海域台风特征分析OA

The average wind speed and wind power density in the waters of Zhejiang Province generally show a trend of being lower in the north and higher in the south.The annual average wind speed increases as the distance from the shore increases.Based on the meteorological data over the years and the tropical cyclone intensity classification standards,the statistics were conducted on the typhoon landings and intensities in different regions of Zhejiang Province.Three typhoon-prone and high-intensity sea areas,namely Xiangshan,Wenling,and Cangnan,were selected to study the distribution of the maximum wind speed under the influence of typhoons.By constructing the Holland typhoon wind field model,the number of typhoons affecting specific sea areas with a distance of 20 km,50 km,and 100 km from the shore in the three regions over the past 50 years was calculated.The maximum wind speed at a height of 10 m in the target sea area was simulated,and it was found that the maximum wind speed increases with the increase in the distance from the shore,and under the same distance conditions,the maximum wind speed in the Cangnan sea area is the highest.Based on the simulation results of the maximum wind speed sequence of typhoons,the design wind speed of wind turbines was calculated using the Poisson-Gumbel distribution model,and the maximum design wind speed at the hub height of 150 m in the offshore area 100 km from the shore in Cangnan County was obtained as 60.66 m/s.For the main models of offshore currents,based on the wind speed calculation results at a hub height of 150 m,the duration of wind turbine shutdown under the influence of typhoons was calculated for the three sea areas with distances of 20 km,50 km,and 100 km from the shore.Among them,the duration of the typhoon impact on the wind turbines in the Xiangshan sea area was the longest,at 25.6 hours.