Eólica. OyM | Wind Power. O&M FuturEnergy | Junio June 2016 www.futurenergyweb.es 88 Disponer de mejores mediciones de rendimiento ayudarán a un mejor comportamiento de toda la industria eólica. Romo Wind ha creado junto con Vattenfall un portal para compartir datos, en el que todos los especialistas interesados pueden verificar o refutar las conclusiones de esta experiencia en campo. Tecnología certificada para la medición de curvas de potencia Con anterioridad a 2013, el único estándar industrial para la medición de la curva de potencia era la norma IEC 61400-12-1, método que requiere el uso de costosos mástiles meteorológicos. Debido a los elevados costes, las mediciones conforme a los estándares IEC suelen efectuarse únicamente en un solo aerogenerador durante la puesta en servicio del parque eólico en cuestión. La curva de potencia determinada se transfiere mediante cálculos a los demás aerogeneradores sin ajustes adicionales a través de mediciones, así el propietario del parque eólico había de confiar en que todos los aerogeneradores del mismo tipo produjeran la misma potencia que el aerogenerador testado. A principios de 2016 la Comisión Electrotécnica Internacional (IEC) confirmaba mediante una hoja aclaratoria, que la tecnología iSpin de Romo Wind puede ser utilizada, conforme a los estándares, para medir de forma rentable la curva de potencia de cada uno de los aerogeneradores de un parque eólico, destacándola como una alternativa más rentable y exacta que tecnologías de medición anteriores. Los resultados de medición que se obtienen con el anemómetro de buje iSpin muestran una variación considerablemente menor que la obtenida con los resultados de todas las demás tecnologías:mástil meteorológico, anemómetro de góndola y sistema LiDAR incluidos. A diferencia de los métodos convencionales, las mediciones iSpin no se ven distorsionadas a causa de los efectos del terreno y de estelas procedentes de otros aerogeneradores del parque eólico. • The difference between iSpin and met mast AEP measurements was only 0.4%. • The total variation in AEP among the turbines remained within 2.1%. • Removing outliers due to curtailment, yaw misalignment and differing installations, the remaining 9 turbines were operating within only 0.3% of AEP between them. • The scatter of power curves measured by the spinner anemometer is significantly less than the scatter of the met mast and LiDAR measurements, as the iSpin measurements are undisturbed by terrain effects and wakes from other turbines in the wind farm. • By using iSpin, operators can cost-effectively monitor the performance of any turbine in any wind farm at any time. Access to the best performance measurements will help the performance of the entire wind industry. RomoWind together with Vattenfall have set up a data sharing portal on which any interested specialist is invited to verify or falsify the conclusions of this field experience. Certified technology for power curve measurement Prior to 2013, the only industry standard for power curve measurement was the IEC 61400-12-1 standard, a method that requires the use of expensive met masts. Due to its high costs, measurements compliant with the IEC standards are usually performed at one single turbine during the commissioning of the wind farm in question. The established power curve is then transferred by calculations to the other turbines without making any further adjustments to the measurements, meaning that wind farm owners would have to trust that every turbine of the same type produces the same output as the tested turbine. In early 2016, the International Electrotechnical Commission (IEC) confirmed, by means of a clarification sheet, that the iSpin technology from RomoWind can be used to effectively measure the power curve of every single turbine in a wind farm and complies with standards as a more costeffective and accurate alternative to previous measurement technologies. The measurement results obtained with the spinner anemometer iSpin show significantly less variation than those obtained from all other technologies, including the met mast, nacelle anemometer and LiDAR. Unlike conventional methods, the iSpin measurements are undisturbed by terrain effects and wakes from other turbines in the wind farm.
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