Abstract

This study presents the design and simulation of a 1 MW grid-connected phasor-type wind turbine system using MATLAB/Simulink. The turbine is modelled with a line-to-line voltage of 400 V and operates at a frequency of 50 Hz, aligning with standards in India. Advanced features include high-temperature superconducting generators to reduce size and weight while maintaining efficiency with minimal losses. The aerodynamic design is optimized using blade element momentum (BEM) theory to enhance performance across various wind speeds. The simulation incorporates a step device for wind speed control and a rate limiter to regulate speed variations. Power flow is measured from the wind turbine to the grid, with a capacitor bank providing necessary reactive power. The results demonstrate that the system successfully delivers 1 MVA of power to the grid, confirming the effectiveness of the design and simulation parameters.

The analysis indicates that as wind speed drops below nominal levels, the pitch angle increases, and reactive power becomes negative, around -0.22. Real power decreases with wind speed, from 1 PU at 12 m/s to 0.495 PU at 10 m/s. At 14 m/s, real power exceeds from 1 PU. With a 400 kVAR capacitor bank, some reactive power is supplied by the grid; whereas at 1 VAR, the grid provides all required reactive power. For a wind speed of 12 m/s, the turbine's power measurement is about 163.2 kVA, while the grid measures 179.5 kVA which is reflecting minor reactive power losses. Ultimately, the wind turbine delivers approximately 0.96 MW of real power to the grid.