Investigating wind speed-dependent models for electric power transmission lines

This paper presents an approach to include changes of wind speed along a transmission line into the line model itself; it then uses the wind speed-dependent model to determine line power handling capabilities when the line is subjected to different wind speeds and wind speed profiles along the length of the line. Case studies are presented to show the effects of wind speed, and therefore of conductor temperature, on the line maximum power transfer. Quantifiable difference are noted when the line models take into account wind speed information. Moreover, the determined voltage stability limits are compared to the line thermal ratings to determine the most limiting factor.