What is the main drawback of using an induction generator in a grid-connected wind turbine?

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RRB JE EE 22 Apr 2025 Shift 1 CBT 2 Official Paper

Answer 1

Grid-connected wind turbine

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In this grid-connected wind power generation system, the wind turbine operates at a variable speed, so the alternator sends out a variable-frequency alternating current, which is converted by a rectifier-inverter device to obtain a constant-frequency alternating current output, which is then connected in parallel with the power grid.
The primary drawback of using an induction generator in a grid-connected wind turbine is that it requires external reactive power from the grid to maintain its operation.
This means the induction generator doesn't just provide active power to the grid; it also draws reactive power, which is needed to create the magnetic field essential for its operation.
The grid's ability to supply reactive power can affect its overall stability, particularly in weak grids.