Power Quality Measurement and Wind Turbine Operating Improvement at the CEMIG Morro do Camelinho Wind Farm in Brazil

The Brazilian utility Companhia Energética de Minas Gerais (CEMIG) is owner of a wind farm, consisting of 4 stall controlled wind turbines (WTs) with direct coupled asynchronous generators. The wind farm was installed in 1994. Statistics of the last years show a not sufficient performance in energy yield and operation of the wind farm. This undesired operational performance leads to a loss in energy yield and also leads to additional structural loads which can diminish the life time considerably. DEWI's measurements at this wind farm in autumn 1997 gave explanations for the insufficient performance and led to improvements of the operation of the wind farm.