6.15 A DC shunt generator is rated 20 kW, 220 V, and 1800 rpm. It has armature and field winding resistances of 0.1 N and 110 n, respectively. The data for the magnetization curve at 1800 rpm are E, (V) 5 25 60 120 170 200 215 225 240 253 I (A) 0.0 0.1 0.25 0.5 0.75 1.0 1.25 1.5 2.0 2.3 The machine is connected as a self-excited generator. a. Determine the maximum generated voltage. b. The generator delivers full-load current at rated voltage with a field current of 2 A. Determine the resistance of the field rheostat. c. Determine the electromagnetic power and torque developed at full-load condition. d. Determine the armature reaction effect in equivalent field amperes (I) at full Joad

6.15 A DC shunt generator is rated 20 kW, 220 V, and 1800 rpm. It has armature and field winding resistances of 0.1 N and 110 n, respectively. The data for the magnetization curve at 1800 rpm are E, (V) 5 25 60 120 170 200 215 225 240 253 I (A) 0.0 0.1 0.25 0.5 0.75 1.0 1.25 1.5 2.0 2.3 The machine is connected as a self-excited generator. a. Determine the maximum generated voltage. b. The generator delivers full-load current at rated voltage with a field current of 2 A. Determine the resistance of the field rheostat. c. Determine the electromagnetic power and torque developed at full-load condition. d. Determine the armature reaction effect in equivalent field amperes (I) at full Joad

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 11.3P

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