The power production of a wind turbine (WT) thus depends upon many parameters such as wind speed, wind direction, air density (a function of temperature, pressure, and humidity) and turbine parameters. The theoretical power captured ( ) by a wind turbine is given by To make wind energy a reliable source, accurate models for predicting the power output and performance monitoring of wind turbines are needed. The uncertain nature of wind and high penetration of wind energy in power systems are a big challenge to the reliability and stability of these systems. Wind power based energy is one of the most rapidly growing areas among the renewable energy sources and will continue to do so because of the growing concern about sustainability and emission reduction requirements. Wind energy has emerged as a promising alternative source for overcoming the energy crisis in the world.
The drawbacks of the existing methods and future scope of research are also identified.
Classification of modelling methods, various modelling techniques available in the literature, model evaluation criteria, and application of soft computing methods for modelling are then reviewed in detail. Modelling methods described here use data from manufacturers’ specifications and actual data from the wind farms. The objectives of modelling, various issues involved therein, and the standard procedure for power performance measurement with its limitations have therefore been discussed here. The methodology of modelling depends upon the purpose of modelling, availability of data, and the desired accuracy. This paper presents a detailed review of different approaches for modelling of the wind turbine power curve. Accurate models of power curves can play an important role in improving the performance of wind energy based systems. With the growth of wind industry, turbines are being installed in diverse climatic conditions, onshore and offshore, and in complex terrains causing significant departure of these curves from the warranted values. Power curve aids in energy assessment, warranty formulations, and performance monitoring of the turbines.
Power curve of a wind turbine depicts the relationship between output power and hub height wind speed and is an important characteristic of the turbine.
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