Investigación sobre variables predictivas del mantenimiento de parques eólicos

Programa Oficial de Doutoramento en Enerxía e Propulsión Mariña. 5014P01[Resumo] A presente tese doctoral presenta un novo procedemento para deseñar os plans de mantemento, así como unha ferramenta de axuda para a toma de decisións operativas e de mantemento nos parques eólicos. Dito procedemento baséase na búsqueda da combinación de valores das variables climáticas que representan estados de alta probabilidade de falla a través do uso de superficies de resposta. Estes estados de alta probabilidade de falla representan un novo concepto, chamado como Indisponibilidade Técnica Climática, que será definido e trataránse as posibles aplicacións do mesmo que van desde a fase de deseño ata a fase de explotación dos parques eólicos.[Resumen] La presente tesis doctoral presenta un nuevo procedimiento para diseñar planes de mantenimiento, así como una herramienta de ayuda para la toma de decisiones operativas y de mantenimiento en los parques eólicos. Dicho procedimiento está basado en la búsqueda de la combinación de valores de las variables climáticas que representan estados de alta probabilidad de fallo mediante el uso de superficies de respuesta. Estos estados de alta probabilidad de fallo representan un nuevo concepto, denominado como Indisponibilidad Técnica Climática, que será definido y se tratarán las posibles aplicaciones del mismo que abarcan desde la fase de diseño hasta la fase de explotación de los parques eólicos.[Abstract] The present doctoral thesis introduces a new procedure to design maintenance plans, as well as a help tool for making operational and maintenance decisions in wind farms. This procedure is based on the search of the combination of values of climatic variables that represent states of high probability of failure through the use of response surfaces. These states high probability of failure represent a new concept called as Unavailability Climate Technical, which will be defined and possible applications thereof ranging from the design phase to the operating phase of the wind farm will be discussed

The Influence of Climate Parameters on Maintenance of Wind Farms: A Galician Case Study

[Abstract] There are different monitoring procedures in wind farms with two main objectives: (i) to improve energy production by the capability of the national electrical network and (ii) to reduce the stooped hours due to preventive and or corrective maintenance activities. In this sense, different sensors are employed to sample in real-time the working conditions of equipment, the electrical production and the weather conditions. Despite this, just the anemometer measurement can be related to the more important errors of interruption of power regulation and anemometer errors. Both errors are related to gusty winds and contribute to more than 33% of the cost of a wind farm. The present paper reports some mathematical relations between weather and maintenance but there are no extreme values of each variable that let us predict a near failure and its corresponding loss of working hours. To achieve this, statistical analysis identifies the relation between weather variables and errors and different models are obtained. What is more, due to the difficulty and economic implications involving the implementation of complex algorithms and techniques of artificial intelligence, it is still a challenge to optimize this process. Finally, the obtained results show a particular case study that can be extrapolated to other wind farms after different case studies to adjust the model to different weather regions, and serve as a useful tool for weather maintenance