Production of electricity of wind power plants and cooling of overhead lines depends from wind velocity. Developed mathematical model for phase transmission line conductor temperature was tested on the example of wind power plant, which is located in Serbian region, South Banat. Based on wind speed measurements and using wind turbine power curve for wind farm power production calculation, conductor temperature was calculated for transmission 110 kV line for wind farm connection to power system. Respecting critical cooling conditions and IEC recommendations, it was find that current-carrying capacity of overhead line for wind farm connection to power system can be up to 70% higher than same overhead line connects conventional power plant.
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