热带气旋致输电线路风压多模型综合计算方法

For the facts that tropical cyclones have caused damages of power equipments and even regional blackouts in coastal areas of our country in recent years, issues related with calculating values of wind pressure withstood by transmission lines in the wind field of a tropical cyclone are discussed. Firstly, an approach to solve the wind field of a tropical cyclone based on the multi-model ensemble is proposed. The approach is based on the characteristic that all models include a common parameter of maximum wind speed radius, and parameters of each model together with weight coefficients by which distributions of wind fields of different models are combined are optimally calculated with a method of multi-layer iteration and dynamic weighting by using information on a tropical cyclone released by the meteorological center. Then, values of wind pressure withstood by transmission lines and their design values of wind pressure are calculated and compared according to the design standard adopted by our country in order to identify transmission lines which are more likely to be damaged or periods during which transmission lines are more likely to be damaged. Finally, data of the tropical cyclone Haikui is taken as an example for analysis, and results show that values of wind pressure withstood by transmission lines calculated with the method of multi-model ensemble are more reliable.