Transformer capacity evaluation of offshore wind farm substation applied to Korean site

An Offshore wind power system is very expensive and different from that of onshore in many ways. There has been a continuous increase in the capacity of the offshore wind farms (OWFs). It is essential to analyze the availability and reliability to optimize the redundancy of OWFs. This paper presents a probabilistic reliability evaluation to determine the number of transformers and that of capacity on offshore AC substation. The proposed approach is based on probabilistic model of wind energy that combines the wind speed with output characteristics of the wind turbines and the overall economic cost model. The economic evaluation is applied to actual wind speed at the southwestern coast of the Korea and their application results are suggested.