A three-phase rural power line, with ACSR #2 conductors, 8 miles in length, supplies a balances three- phase load of 50 A per phase. The load is located at the end of the line and has a power factor of 0.8 lagging. The line impedance 1.41 +j0.8266 ohms/mile. The phase-to-phase voltage is maintained at 24.94 kV with regulation equipment. Note that lagging power factor means the load current lags the load voltage. 1) Determine percent voltage drop along the line considering the exact expressions based on the sending end voltage 2) Determine percent voltage drop along the line only considering the in-phase component of the voltage drop 3) The angle between the send and receiving end. Repeat 1 and 2 above using a line with ACSR 336 MCM conductor (parameters given below) R and X for the ACSR 336 MCM0.306 and 0.638 ohms/mi Buss 1410/mi jo.8266 0/mi Busr Load 8 Miles 50 A/phase 0.8 PF Lagging Vs VR 36.87°

A three-phase rural power line, with ACSR #2 conductors, 8 miles in length, supplies a balances three- phase load of 50 A per phase. The load is located at the end of the line and has a power factor of 0.8 lagging. The line impedance 1.41 +j0.8266 ohms/mile. The phase-to-phase voltage is maintained at 24.94 kV with regulation equipment. Note that lagging power factor means the load current lags the load voltage. 1) Determine percent voltage drop along the line considering the exact expressions based on the sending end voltage 2) Determine percent voltage drop along the line only considering the in-phase component of the voltage drop 3) The angle between the send and receiving end. Repeat 1 and 2 above using a line with ACSR 336 MCM conductor (parameters given below) R and X for the ACSR 336 MCM0.306 and 0.638 ohms/mi Buss 1410/mi jo.8266 0/mi Busr Load 8 Miles 50 A/phase 0.8 PF Lagging Vs VR 36.87°

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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Concept explainers

Short Transmission Line

A short transmission line is a transmission line that has a length less than 80 kilometers, an operating voltage level of less than 20 kV, and zero capacitance effect.

Power Flow Analysis

Power flow analysis is a topic in power engineering. It is the flow of electric power in a system. The power flow analysis is preliminary used for the various components of Alternating Current (AC) power, such as the voltage, current, real power, reactive power, and voltage angles under given load conditions and is often known as a load flow study or load flow analysis.

Complex Form

A power system is defined as the connection or network of the various components that convert the non-electrical energy into the electric form and supply the electric form of energy from the source to the load. The power system is an important parameter in power engineering and the electrical engineering profession. The powers in the power system are primarily categorized into two types- active power and reactive power.

Question

A three-phase rural power line, with ACSR #2 conductors, 8 miles in length, supplies a balances three-
phase load of 50 A per phase. The load is located at the end of the line and has a power factor of 0.8
lagging. The line impedance 1.41 +j0.8266 ohms/mile. The phase-to-phase voltage is maintained at
24.94 kV with regulation equipment. Note that lagging power factor means the load current lags the load
voltage.
1) Determine percent voltage drop along the line considering the exact expressions based on the
sending end voltage
2) Determine percent voltage drop along the line only considering the in-phase component of the
voltage drop
3) The angle between the send and receiving end.
Repeat 1 and 2 above using a line with ACSR 336 MCM conductor (parameters given below)
R and X for the ACSR 336 MCM0.306 and 0.638 ohms/mi
Buss
BusR
1410/mi jo.8266 0/mi
Load
8 Miles
50 A/phase
0.8 PF Lagging
Vs
VR
36.87°

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