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Wind farm costs are largely determined by two factors: the complexity of the site and the likely extreme loads. The site may be considered complex if the ground conditions are difficult – hard rock, or very wet or boggy ground, for example – or if access is a problem. A very windy site with high extreme loads will result in a more expensive civil infrastructure as well as a higher specification for the turbines.
The cost of the grid connection may also be important. Grid connection costs are affected by:
- Distance to a suitable network connection point;
- The voltage level of the existing network; and
- The network operator’s principles for charging for connections and for the use of the electricity system.
Costs are covered in Part III.
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