Study on Wind Farm Grounding System

In this paper, a complete step-by-step analysis for the designing of a wind farm grounding system is carried out. The soil structure is determined based on soil resistivity measurements. The use of the appropriate method and the rigorous application of the method are very important. Thereafter, a grounding system for each wind turbine (WT) and the control station is designed and enhancements of the grounding system are proposed in cases of increased values of ground resistance and unsafe touch and step voltages. The appropriate way of enhancement of the grounding system is investigated for different cases. In addition, the effect of the concrete on WT foundation is investigated aiming to the most efficient designing of a wind farm grounding system. The results and the proposed methodologies are verified with measurements that are carried out after the construction of the wind farm.