A overhead 3-phase transmission line delivers 5 MW at 22 kV at 0.8 lagging power factor. The resistance and reactance of each conductor is 4 and 6 respectively. Determine: (i) sending end voltage (ii) total line losses (ii) percentage regulation (iv) transmission efficiency

A overhead 3-phase transmission line delivers 5 MW at 22 kV at 0.8 lagging power factor. The resistance and reactance of each conductor is 4 and 6 respectively. Determine: (i) sending end voltage (ii) total line losses (ii) percentage regulation (iv) transmission efficiency

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

Chapter5: Transmission Lines: Steady-state Operation

Section: Chapter Questions

Problem 5.25P

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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

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A overhead 3-phase transmission line delivers 5 MW at 22 kV at 0.8 lagging
power factor. The resistance and reactance of each conductor is 4 and 6 respectively.
Determine:
(i) sending end voltage
(iii) total line losses
(ii) percentage regulation
(iv) transmission efficiency

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Step 1: Given data:

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Step 2: Determining sending end voltage per line:

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Step 3: Determining percentage regulation:

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Step 4: Determining total line losses:

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Step 5: Determining transmission efficiency:

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