Apr 2013
Electricity Transmission
Wind Turbine Effects on Transmission Lines
IFI 0707
Apr 2013
SP Energy Networks
SP Energy Networks Innovation
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Innovation Funding Incentive
The scope of the project is to determine the magnitude of the problem from constant speed and or variable speed wind generators through research / investigation on the effects of the wind pattern (down wind of wind turbines) on the structure and spans of adjacent overhead line.

Modern wind turbines can be as large as 80m in diameter (for 1MW+). Behind the turbine, the mean wind speed / pressure can be reduced, and turbulence severely increased. The reduced pressure of the new wind pattern created by the rotating blades is considered likely to affect a structure / overhead line in the vicinity of wind turbines.

The Scottish Renewable Obligation (SRO) capped windfarm development at 15MW per site, which consequently required 33kV connection. Posts SRO a number of large scale developments are now being pursued that require transmission connections. With more transmission connected windfarms being developed and the standard turbine size increasing there is a need to understand the potential impact on adjacent tower structures and conductor spans.