Research On Performance Evaluation Of Wind Turbine Based On Operation Data

Wind power generation has been a renewable energy generation technology because of its non-polluting, large-scale development and other advantages. With the wind farm operation and management level requirements increasing, the performance evaluation of wind turbine has become one of key issues in the urgent research areas. In the background of the wind power generation, this paper researches on the performance evaluation of wind turbine based on operational data. The research content is as follows:1、The overall performance evaluation of wind turbines. Power curve of wind turbines is the reference of the unit design and manufacture, and it is an important indicator to investigate the efficiency of unit generating and evaluate the performance of wind turbines. In this paper, grid method is used to process data reasonably within the framework of IEC61400 -12 - 1 international standard. Modeling of wind turbine power curve is based on Gaussian Process. Based on the model, the power curves are compared between the different units, the differences between the power generation efficiency are studied, and the overall performance of the wind turbine is evaluated.2、Performance evaluation of the components of wind turbines. On the basis of the evaluation of the overall performance of wind turbine, components are evaluated by comparing with the benchmarking unit, including environmental factors, yaw system, pitch and control systems. Each component of the unit which has the effect in different ways and degrees, makes the differences between generation efficiency and performance. Spring wind characteristics in most regions of our country lead to the highest power generation efficiency. Turbulence characteristics directly affect the wind speed and direction, which affect the efficiency of power generation units additionally. Due to the weather vane accuracy and yaw error, wind turbine generation capacity is affected by yaw system. Pitch system also exist deviation of the pitch angle, resulting in aerodynamic torque and axial load imbalance. According to the problem of decline of the performance which caused by wind turbine sub-components, this paper presents preliminary improved optimization scheme.