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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