Repeat Example 11.1 except assume the number of poles is changed from 32 to 16, H is changed from 2.0 p.u-s to 1.5 p.u.s, and the unit is initially operating with an electrical and mechanical power of 0.5 p.u.

 

Problem 11.1

A three-phase, 60-Hz, 500-MVA, 11.8-kV, 4-pole steam turbine-generating unit has an H constant of 6 p.u.-s. Determine: (a) ωsyn and ωmsyn; (b) the kinetic energy in joules stored in the rotating masses at synchronous speed; (c) the mechanical angular acceleration α_m and electrical angular acceleration a if the unit is operating at synchronous speed with an accelerating power of 500 MW.

 

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