SYNCHRONOUS GENERATORanswer #2 Your answer2. What is the efficiency of the generator at these conditions? *Your answer3. Another identical delta-connected load is to be paralleled with the first one.What is the new terminal voltage after the load has been added? *Your answer A 13.8 kV, 50-MVA, 0.9 p.f., 60 Hz, four pole, Y-connected synchronous generator has a synchronousreactance of 2.5 ohms, and an armature resistance of 0.2 ohm. At 60 Hz, its friction and windage lossesare 1 MW, and its core losses are 1.5 MW. The field circuit has a dc voltage of 120 V, and the maximumfield current is 5A. The current of the field circuit is adjustable over the range from 0 to 10 A. The OCC ofthis generator is shown in the figure.1.What will the terminal voltage of this generator be if it is connected to a delta-connected with an impedance of 24 cis 25 deg ohms? *Open-circuit characteristic2018161412103.456.10Field cument (A)Open-circuit voltage (kV)00

It is given that: VL=13.8 kVMVA=50cosϕ=0.9f=60 HzXs=2.5 ΩRa=0.2 ΩPF&W=120 VPcore=1.5 MWPstray=0…

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What is the efficiency of the generator at these conditions?

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

Chapter12: Power System Controls

Section: Chapter Questions

Problem 12.11P

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Concept explainers

DC Generator

An electromechanical machine which converts input mechanical energy to respective output electric energy is called a generator.

Question

SYNCHRONOUS GENERATOR answer #2

Your answer
2. What is the efficiency of the generator at these conditions? *
Your answer
3. Another identical delta-connected load is to be paralleled with the first one.
What is the new terminal voltage after the load has been added? *
Your answer

A 13.8 kV, 50-MVA, 0.9 p.f., 60 Hz, four pole, Y-connected synchronous generator has a synchronous
reactance of 2.5 ohms, and an armature resistance of 0.2 ohm. At 60 Hz, its friction and windage losses
are 1 MW, and its core losses are 1.5 MW. The field circuit has a dc voltage of 120 V, and the maximum
field current is 5A. The current of the field circuit is adjustable over the range from 0 to 10 A. The OCC of
this generator is shown in the figure.
1.
What will the terminal voltage of this generator be if it is connected to a delta-
connected with an impedance of 24 cis 25 deg ohms? *
Open-circuit characteristic
20
18
16
14
12
10
3.
4
5
6.
10
Field cument (A)
Open-circuit voltage (kV)
00

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