Three identical steam-turbine generators G,, G2, and G3 are operating in parallel. Each generator is: 7.2 KV, 20 MVA, 50 Hz, 0.85 PF lagging, 4-poles, Y-connected, with a synchronous reactance of 2 Q and an armature resistance of 0.05 Q. Each of generators G1 and G2 has a characteristic power-frequency slope of 4.7 MW/Hz, while generator G3 has a slope of 5.0 MW/Hz. If all three generators are supplying a total load of 51.2 MW, and the no-load frequency of each generator is set to 52.4 Hz, what will the system frequency be? How much power is supplied by generator G3? Select one: O a. fsys = 48.84 Hz, PG3 = 17.8 MW O b. None O c. fsys = 49.05 Hz, PG3 = 16.75 MW O d. fsys = 48.95 Hz, PG3 = 17.25 MW Clear my choice

Three identical steam-turbine generators G,, G2, and G3 are operating in parallel. Each generator is: 7.2 KV, 20 MVA, 50 Hz, 0.85 PF lagging, 4-poles, Y-connected, with a synchronous reactance of 2 Q and an armature resistance of 0.05 Q. Each of generators G1 and G2 has a characteristic power-frequency slope of 4.7 MW/Hz, while generator G3 has a slope of 5.0 MW/Hz. If all three generators are supplying a total load of 51.2 MW, and the no-load frequency of each generator is set to 52.4 Hz, what will the system frequency be? How much power is supplied by generator G3? Select one: O a. fsys = 48.84 Hz, PG3 = 17.8 MW O b. None O c. fsys = 49.05 Hz, PG3 = 16.75 MW O d. fsys = 48.95 Hz, PG3 = 17.25 MW Clear my choice

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter11: Transient Stability

Section: Chapter Questions

Problem 11.8P

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