Two 150 MVA synchronous generators, 20 kV three-phase star-connected which has a armor resistance of 0.04ohm/phase and a synchronous reactance of 1.2 ohm/phase. They feed at a load of 225 MVA late power factor of 0.82. Each generator has a winding in the stator with 144 8-pole slots winding in double layer and each distributed winding has 20 coils, this dented with step fraction of 7/8 where the flow per pole is 5.23x10^6 lines and the rotor speed is 900 r/min. Determine a) determine the winding factors kp, Kd b) total number of laps per phase c) phase voltage d) voltage between phases. (e) the voltage generated for each generator if it distributes equal loads. ) If the machine is asked to reduce the actual power by 13% by need of operation and increase the reactive power by 18% determine the actual and reactive power of each machine and its power factor. g) Calculate the torque angle of cach generator h) Calculate the voltage generated under these conditions. i) Plot the vector diagram of cach generator.

Two 150 MVA synchronous generators, 20 kV three-phase star-connected which has a armor resistance of 0.04ohm/phase and a synchronous reactance of 1.2 ohm/phase. They feed at a load of 225 MVA late power factor of 0.82. Each generator has a winding in the stator with 144 8-pole slots winding in double layer and each distributed winding has 20 coils, this dented with step fraction of 7/8 where the flow per pole is 5.23x10^6 lines and the rotor speed is 900 r/min. Determine a) determine the winding factors kp, Kd b) total number of laps per phase c) phase voltage d) voltage between phases. (e) the voltage generated for each generator if it distributes equal loads. ) If the machine is asked to reduce the actual power by 13% by need of operation and increase the reactive power by 18% determine the actual and reactive power of each machine and its power factor. g) Calculate the torque angle of cach generator h) Calculate the voltage generated under these conditions. i) Plot the vector diagram of cach generator.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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