VR Line impedance Mi M1 Transformer Vs VT M3 M: M2 Line impedance neutral Line impedance M3 Figure 2: Distribution lines equivalent circuit. Figure 1: Low voltage lines exiting the distribution transformer center. In the given circuit, low voltage lines are seen coming out of a distribution transformer whose Low Voltage side is star connected. R (R = 0) phase for M1 line, S (@S = 120) phase for M2 line andT (øT = -120) phase is used for M3 line. The impedances of the loads at the end of the lines are (100 + j25) N and the impedances of the lines (1 + j) N. • Find line currents

VR Line impedance Mi M1 Transformer Vs VT M3 M: M2 Line impedance neutral Line impedance M3 Figure 2: Distribution lines equivalent circuit. Figure 1: Low voltage lines exiting the distribution transformer center. In the given circuit, low voltage lines are seen coming out of a distribution transformer whose Low Voltage side is star connected. R (R = 0) phase for M1 line, S (@S = 120) phase for M2 line andT (øT = -120) phase is used for M3 line. The impedances of the loads at the end of the lines are (100 + j25) N and the impedances of the lines (1 + j) N. • Find line currents

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 3.41P: Consider the single-line diagram of the power system shown in Figure 3.38. Equipment ratings are...

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Consider a single-phase electric system shown in Figure 3.33. Transformers are rated as follows: XY15MVA,13.8/138kV, leakage reactance 10 YZ15MVA,138/69kV, leakage reactance 8 With the base in circuit Y chosen as 15MVA,138kV determine the per-unit impedance of the 500 resistive load in circuit Z, referred to circuits Z, Y, and X. Neglecting magnetizing currents, transformer resistances, and line impedances, draw the impedance diagram in per unit.
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