Optimization of 33/225 KV Power evacuation transformers in onshore wind farms in Morocco

This article aims at optimizing the choice of the power rating of the 33/225 KV transformers of the wind farms under the Moroccan program of 850 MW wind, important part of the Moroccan renewable energy strategy up to 2020. This optimization is based on a technical and economic approach that integrates parameters such as turbine power distributions, selling price of the kWh and discount rate. The power distribution is established using the record of wind speeds in terms of frequencies, correlated to power curve of the 3.3 MW machine, of model Vestas V112 -3.3 MW 50 Hz, consisting of a synchronous generator with a Full Scale AC/DC/AC converter.