Problem 4.7: A 80 MVA, 4-pole, 60-Hz synchronous generator operates at 0.90 power factor lagging. Its cylindrical rotor of 5 m length and 1.5 m diameter has the average mass density of 8.3 g/cm³. Assuming that the turbine rotor has inertia 1.5 x generator rotor inertia, determine the inertia constant H of this turbine-generator set.
Problem 4.7: A 80 MVA, 4-pole, 60-Hz synchronous generator operates at 0.90 power factor lagging. Its cylindrical rotor of 5 m length and 1.5 m diameter has the average mass density of 8.3 g/cm³. Assuming that the turbine rotor has inertia 1.5 x generator rotor inertia, determine the inertia constant H of this turbine-generator set.
Introductory Circuit Analysis (13th Edition)
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Author:Robert L. Boylestad
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Synchronous Generator
In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.
Salient Pole Rotor
Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.
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Transcribed Image Text:Problem 4.7: A 80 MVA, 4-pole, 60-Hz synchronous generator operates at
0.90 power factor lagging. Its cylindrical rotor of 5 m length and 1.5 m
diameter has the average mass density of 8.3 g/cm³. Assuming that the
turbine rotor has inertia 1.5 x generator rotor inertia, determine the inertia
constant H of this turbine-generator set.
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