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The increasing development of large-scale offshore wind farms around the world has caused many new technical and economic challenges to emerge. The capital cost of the electrical network that supports a large offshore wind farm constitutes a significant proportion of the total cost of the wind farm. Thus. finding the optimal design of this electrical network is an important task. a task that is addressed in this paper. A cost model has been developed that includes a more realistic treatment of the cost of transformers. transformer substations. and cables. These improvements make this cost model more detailed than others that are currently in use. A novel solution algorithm is used. This algorithm is based on an improved genetic algorithm and includes a specific algorithm that considers different cable cross sections when designing the radial arrays. The proposed approach is tested with a large offshore wind farm. this testing has shown that the proposed algorithm produces valid optimal electrical network designs.
