Answered: Problem 2. Calculate the…

Problem 2. Calculate the capacitance-to-neutral in F/m and the admittance-to-neutral in S/km for the three- phase line in Problem 1 (stated above). Neglect the effect of the earth plane.

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

Chapter4: Transmission Line Parameters

Section: Chapter Questions

Problem 4.10P: A 60-Hz, three-phase three-wire overhead line has solid cylindrical conductors arranged in the form...

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Concept explainers

Nodal Analysis

In the analysis of any electric circuit, nodal analysis is the method of determining the potential difference or voltage between different nodes in an electric circuit. A node is a point where two or more branches connect each other. In the nodal analysis, the voltages are determined in the terms of branch currents. The nodal analysis is also known as the node voltage method or branch current method. The nodal analysis method is one of the several applications of Kirchhoff's Current Law (KCL).

Question

Please answer Problem 2 ONLY in detailed solution.

Problem 2. Calculate the capacitance-to-neutral in F/m and the admittance-to-neutral in S/km for the three-
phase line in Problem 1 (stated above). Neglect the effect of the earth plane.

Problem 1. A 60-Hz three-phase, three-wire overhead line has solid cylindrical conductors arranged in the
form of an equilateral triangle with 4 ft conductor spacing. Conductor diameter is 0.5 in. Calculate the positive-
sequence inductance in H/m and the positive-sequence inductive reactance in 2 /km.

Expert Solution

Step 1

When three-phase overhead lines are running, due to high voltage difference it forms a capacitance. this capacitance will be in between lines or line to ground. Capacitance depends on the length and the size of the conductor.

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