QUESTION 4 a) The single-line diagram of a three-phase system is shown in figure below. The manufacturer's nominal ratings are given as in table below. Using the common base S, = 60 MVA, draw the impedance diagram in per unit including the load impedance. Voltage base for buses 1, 2, and 3 is 120kV. Transmission lines 1, 2, and 3 have the reactance of 502, 40 2, and 302, respectively. Bus 0 Bus 2 Component S (VA) v (kV) Line 1 X G2 G1 48 MVA 20 kV 22% G2 30 MVA 15 kV 17% Line 2 Line 3 T1 50 MVA 20/110 kV 9% Bus 3 T2 35 MVA 15/110 kV 5% T3 50 MVA 11/110 KV 12% Bus Load

QUESTION 4 a) The single-line diagram of a three-phase system is shown in figure below. The manufacturer's nominal ratings are given as in table below. Using the common base S, = 60 MVA, draw the impedance diagram in per unit including the load impedance. Voltage base for buses 1, 2, and 3 is 120kV. Transmission lines 1, 2, and 3 have the reactance of 502, 40 2, and 302, respectively. Bus 0 Bus 2 Component S (VA) v (kV) Line 1 X G2 G1 48 MVA 20 kV 22% G2 30 MVA 15 kV 17% Line 2 Line 3 T1 50 MVA 20/110 kV 9% Bus 3 T2 35 MVA 15/110 kV 5% T3 50 MVA 11/110 KV 12% Bus Load

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

Chapter6: Power Flows

Section: Chapter Questions

Problem 6.30P: Determine the bus admittance matrix (Ybus) for the three-phase power system shown in Figure 6.23...

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