8. When the frequency on the grid changes the initial response comes from the rotating energy...

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8. When the frequency on the grid changes the initial response comes from the rotating energy stored in all rotors on the grid. The rotational energy for a spinning body is Ekin w Jmech 2 (1) where J is the moment of inertia in kgm, and wmech is the mechanical angular speed. Assume a 58 MW machine with 12 pole pairs has a moment of inertia of 590'000 kgm. If the electrical frequency drops with a value of 0.05 Hz in 4 seconds calculate the power the change in frequency adds to the grid during the 4 seconds if we assume that the turbine power is constant, and that the frequency falls linearly. 8. When the frequency on the grid changes the initial response comes from the rotating energy stored in all rotors on the grid. The rotational energy for a spinning body is Ekin w Jmech 2 (1) where J is the moment of inertia in kgm, and wmech is the mechanical angular speed. Assume a 58 MW machine with 12 pole pairs has a moment of inertia of 590'000 kgm. If the electrical frequency drops with a value of 0.05 Hz in 4 seconds calculate the power the change in frequency adds to the grid during the 4 seconds if we assume that the turbine power is constant, and that the frequency falls linearly.

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The question is asking us to calculate the power delivered to the grid due to the change in rotational energy of a 58 MW machine with 12 pole pairs as ... View the full answer