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Example 2-3. A simple power system is shown in Figure 2–22. This system con- tains a 480-V generator connected to an ideal 1:10 step-up transformer, a transmission line, an ideal 20:1 step-down transformer, and a load. The impedance of the transmission line is 20 + j60 N, and the impedance of the load is 10230°N. The base values for this system are chosen to be 480 V and 10 kVA at the generator. (a) Find the base voltage, current, impedance, and apparent power at every point in the power system. (b) Convert this system to its per-unit equivalent circuit. (c) Find the power supplied to the load in this system. (d) Find the power lost in the transmission line. Line 20Ω Iload Zioad = 10 30°N j60 N 1:10 20:1 Zine 480 0° V Region I Region 2 Region 3

Example 2-3. A simple power system is shown in Figure 2–22. This system con- tains a 480-V generator connected to an ideal 1:10 step-up transformer, a transmission line, an ideal 20:1 step-down transformer, and a load. The impedance of the transmission line is 20 + j60 N, and the impedance of the load is 10230°N. The base values for this system are chosen to be 480 V and 10 kVA at the generator. (a) Find the base voltage, current, impedance, and apparent power at every point in the power system. (b) Convert this system to its per-unit equivalent circuit. (c) Find the power supplied to the load in this system. (d) Find the power lost in the transmission line. Line 20Ω Iload Zioad = 10 30°N j60 N 1:10 20:1 Zine 480 0° V Region I Region 2 Region 3

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
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Example 2-3. A simple power system is shown in Figure 2–22. This system con- tains a 480-V generator connected to an ideal 1:10 step-up transformer, a transmission line, an ideal 20:1 step-down transformer, and a load. The impedance of the transmission line is 20 + j60 N, and the impedance of the load is 10230°N. The base values for this system are chosen to be 480 V and 10 kVA at the generator. (a) Find the base voltage, current, impedance, and apparent power at every point in the power system. (b) Convert this system to its per-unit equivalent circuit. (c) Find the power supplied to the load in this system. (d) Find the power lost in the transmission line. line Iload Zioad = 10 Z 30°N 20Ω j60 N 1:10 20:1 Zine VG 480 Z0° V Region 1 Region 2 Region 3
Transcribed Image Text:Example 2-3. A simple power system is shown in Figure 2–22. This system con- tains a 480-V generator connected to an ideal 1:10 step-up transformer, a transmission line, an ideal 20:1 step-down transformer, and a load. The impedance of the transmission line is 20 + j60 N, and the impedance of the load is 10230°N. The base values for this system are chosen to be 480 V and 10 kVA at the generator. (a) Find the base voltage, current, impedance, and apparent power at every point in the power system. (b) Convert this system to its per-unit equivalent circuit. (c) Find the power supplied to the load in this system. (d) Find the power lost in the transmission line. line Iload Zioad = 10 Z 30°N 20Ω j60 N 1:10 20:1 Zine VG 480 Z0° V Region 1 Region 2 Region 3
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