Which consequence results when the encoder on a variable-pitch wind turbine generator malfunctions during a grid disturbance?

💡 Explanation

Uncontrolled blade pitch occurs because the malfunctioning encoder cannot provide accurate rotor position feedback; therefore the pitch control system using proportional integral derivative (PID) control will become unstable, rather than maintaining optimal aerodynamic loading during disturbances, potentially leading to mechanical stress and faults.

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