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The figure below shows the one-line diagram of a power system. The three-phase power and line-line ratings are as follows: X = 12 % 18/270 KV X = 8 % G: 80 MVA 20 KV T: 60 MVA T2: 70 MVA 250/20 KV X = 10 % Line: Z = 45 + j 225 a 280 KV The loads are: Sz = 60 MVA, 0.75 power factor lagging at 320 KV. S2 = 60 MVA, 0.75 power factor lagging at 23 KV. T V, Lin

The figure below shows the one-line diagram of a power system. The three-phase power and line-line ratings are as follows: X = 12 % 18/270 KV X = 8 % G: 80 MVA 20 KV T: 60 MVA T2: 70 MVA 250/20 KV X = 10 % Line: Z = 45 + j 225 a 280 KV The loads are: Sz = 60 MVA, 0.75 power factor lagging at 320 KV. S2 = 60 MVA, 0.75 power factor lagging at 23 KV. T V, Lin

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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The figure below shows the one-line diagram of a power system. The three-phase power and line-line ratings are as follows: G: 80 MVA 20 KV X = 12 % T: 60 MVA 18/270 KV X = 8 % T2: 70 MVA 250/20 KV X = 10 % Line: 280 KV Z = 45 + j 225 0 The loads are: S1 = 60 MVA, 0.75 power factor lagging at 320 KV. S2 = 60 MVA, 0.75 power factor lagging at 23 KV. %3D %3D Ti T: V. Line Using 100-MVA as base power and 20 kV at the generator side as base voltage, the per-unit resistance of load Sz is: Select one: Оа. 1422 рu O b. 222.1 pu O. 1.422 - j1.254 pu O d. 1279.5 pu
Transcribed Image Text:The figure below shows the one-line diagram of a power system. The three-phase power and line-line ratings are as follows: G: 80 MVA 20 KV X = 12 % T: 60 MVA 18/270 KV X = 8 % T2: 70 MVA 250/20 KV X = 10 % Line: 280 KV Z = 45 + j 225 0 The loads are: S1 = 60 MVA, 0.75 power factor lagging at 320 KV. S2 = 60 MVA, 0.75 power factor lagging at 23 KV. %3D %3D Ti T: V. Line Using 100-MVA as base power and 20 kV at the generator side as base voltage, the per-unit resistance of load Sz is: Select one: Оа. 1422 рu O b. 222.1 pu O. 1.422 - j1.254 pu O d. 1279.5 pu
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