Problem 2. A 150-MVA, 220/22-kV, three-phase has the following parameters (in 2): R2 = 0.001 X, = 0.002 R, = 0.1 X= 7800 X, = 0.25 R = 30250 The transformer is operating in step-down mode and delivering hafl of rated load at 22.5kV and 0.86 power factor lagging. a) Determine the equivalent circuit referred to the high-voltage side; b) Find the primary voltage and current; c) Determine the voltage regulation. d) Determine the efficiency.
Problem 2. A 150-MVA, 220/22-kV, three-phase has the following parameters (in 2): R2 = 0.001 X, = 0.002 R, = 0.1 X= 7800 X, = 0.25 R = 30250 The transformer is operating in step-down mode and delivering hafl of rated load at 22.5kV and 0.86 power factor lagging. a) Determine the equivalent circuit referred to the high-voltage side; b) Find the primary voltage and current; c) Determine the voltage regulation. d) Determine the efficiency.
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 3.34P: Three single-phase, two-winding transformers, each rated 450MVA,20kV/288.7kV, with leakage reactance...
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![Problem 2. A 150-MVA, 220/22-kV, three-phase has the following parameters (in 2):
R, = 0.1
R2 = 0.001
Xm= 7800
X, = 0.25
X, = 0.002
R = 30250
%3D
The transformer is operating in step-down mode and delivering hafl of rated load at 22.5kV and 0.86 power
factor lagging.
a) Determine the equivalent circuit referred to the high-voltage side;
b) Find the primary voltage and current;
c) Determine the voltage regulation.
d) Determine the efficiency.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fcffbfd7d-9e57-440a-a07a-2b8625274f6a%2F84afb195-c1e8-439d-9440-8746b2e98979%2Fwlava4p_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Problem 2. A 150-MVA, 220/22-kV, three-phase has the following parameters (in 2):
R, = 0.1
R2 = 0.001
Xm= 7800
X, = 0.25
X, = 0.002
R = 30250
%3D
The transformer is operating in step-down mode and delivering hafl of rated load at 22.5kV and 0.86 power
factor lagging.
a) Determine the equivalent circuit referred to the high-voltage side;
b) Find the primary voltage and current;
c) Determine the voltage regulation.
d) Determine the efficiency.
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