solve D and E. A 15-kV 35-KVA 0.76-PF-lagging 50-Hz four-pole Y-connected steam-turbinegenerator has a synchronous reactance of 3.50 0 per phase and an armatureresistance of 0.75 0 per phase. This generator is operating in parallel with alarge power system (infinite bus).a) What is the magnitude of E, at rated conditions?b) What is the generator's torque angle at rated conditions?c) If the field current is constant, what is the maximum powerpossible out of this generator? How much reserve power ortorque does this generator have at full load?d) Sketch the corresponding phasor diagram and calculate for thearmature current (assume the field current is still unchanged)e) At the absolute power possible, how much reactive power will thisgenerator be supplying or consuming?

An alternator/Synchronous generator is a type of electrical machine that converts mechanical energy…

d) Sketch the corresponding phasor diagram and calculate for the armature current (assume the field current is still unchanged) e) At the absolute power possible, how much reactive power will this generator be supplying or consuming?

d) Sketch the corresponding phasor diagram and calculate for the armature current (assume the field current is still unchanged) e) At the absolute power possible, how much reactive power will this generator be supplying or consuming?

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

Chapter6: Power Flows

Section: Chapter Questions

Problem 6.48P

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Concept explainers

Gradient of a Scalar Field

Consider a room or a place where the temperature is denoted by a scalar field T, such that at each point (x, y, z), the temperature is given as T(x, y, z). It is independent of time, in which the temperature rises most quickly. The gradient of T will show the direction at that point by moving away from (x, y, z). How far will the rise in temperature in that direction be determined by the gradient magnitude? Consider a surface that has a height above sea level at point (x, y) which is given by H(x, y). At that point, pointing in the direction of the steepest slope or grade is the gradient of H. The magnitude of the gradient of the vector gives the steepness of the slope at that point. How a scalar field changes in another direction can be measured by the gradient by taking a dot product rather than just the direction of the greatest change?

Question

solve D and E.

A 15-kV 35-KVA 0.76-PF-lagging 50-Hz four-pole Y-connected steam-turbine
generator has a synchronous reactance of 3.50 0 per phase and an armature
resistance of 0.75 0 per phase. This generator is operating in parallel with a
large power system (infinite bus).
a) What is the magnitude of E, at rated conditions?
b) What is the generator's torque angle at rated conditions?
c) If the field current is constant, what is the maximum power
possible out of this generator? How much reserve power or
torque does this generator have at full load?
d) Sketch the corresponding phasor diagram and calculate for the
armature current (assume the field current is still unchanged)
e) At the absolute power possible, how much reactive power will this
generator be supplying or consuming?

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