a) The one line diagram of a three phase system is shown below, draw an impedance diagram showing all impedances in per-unit on a 100 MVA base. b) The motor is drawing 40 MVA at 0.9 power factor lagging at a line- to-line terminal voltage of 10 KV. Determine the terminal voltage of the generator.

a) The one line diagram of a three phase system is shown below, draw an impedance diagram showing all impedances in per-unit on a 100 MVA base. b) The motor is drawing 40 MVA at 0.9 power factor lagging at a line- to-line terminal voltage of 10 KV. Determine the terminal voltage of the generator.

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

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.43P: Three single-phase transformers, each rated 10MVA,66.4/12.5kV,60Hz, with an equivalent series...

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Concept explainers

Compensation Techniques

The compensation techniques are the methods that are employed in the electrical control systems to enhance the performance of the system. The performance are generally affected by the factors like lag in the compensating devices, slow response of the system of the components like sensors used in the control system. The basic compensation technique involves lag compensation, lead compensation or the combination of the both.

Question

a) The one line diagram of a three phase system is shown below, draw an
impedance diagram showing all impedances in per-unit on a 100
MVA base.
b) The motor is drawing 40 MVA at 0.9 power factor lagging at a line-
to-line terminal voltage of 10 KV. Determine the terminal voltage of
the generator.
T,
т,
x = 48.4 2
50 MVA
100 MVA
11/220 KV
220/11 KV
10%
10%
M
50 MVA
10 KV
18.15 %
80 MVA
11 KV
20 %
50 MVA
250/10 KV
9.68 %
1.5488 + j0.7744 2
X, = 58.08 2
= 45.98 N

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