Scaled Component Models for Wind Farm Power Analysis Based on Direct-Drive Wind Turbines

In the past, gearboxes were used in wind turbines to adjust the rotor rotational speed. With advancements in the technology of wind turbines, wind farm developers adopt direct-drive wind turbines based on permanent magnet synchronous generators. In the power quality analysis in wind farms, the wind turbine model is used to simulate the electrical characteristics of wind turbines to meet regulatory requirements. However, it takes considerable time for a detailed analysis and assessment of wind turbine models in the early stages of large wind farms. Therefore, based on direct-drive wind turbines, we used power systems computer aided design (PSCAD) to construct several wind turbine units (SWTU) and scale component models (SCM). The model’s performance was explored regarding tip speed ratio, pitch angle, and output power at different wind speeds. The practicality and performance of aggregated models were evaluated effectively in power system analysis.