Transmission Line Parameters

UNIT – I

Chapter - 1

Transmission Line Parameters

Syllabus

Structure of Power System - Parameters of single and three phase transmission lines with single and double circuits - Resistance, inductance and capacitance of solid, stranded and bundled conductors, Symmetrical and unsymmetrical spacing and transposition - application of self and mutual GMD; skin andproximity effects -Typical configurations, conductor types and electrical parameters ofEHV lines.

Contents

1.1 Introduction

1.2 Structure of Power System  …  Dec.-03, 04, 07, 09,10,13,17, … May-05, 06, 08, 09, 11, 12, 13, 14, … 16,17,18, … Marks 16

1.3 Types of Transmission  … May-05,17, … Marks 4

1.4 Types of Line Conductors … May-17, … Marks 4

1.5 Methods of Arrangement of Conductors

1.6 Introduction to Transmission Line Parameters

1.7 Transmission Line Constants

1.8 Resistance

1.9 Inductance

1.10 Capacitance

1.11 Inductance of a Conductor … Dec.-17, … Marks 6

1.12 Inductance of a Single Phase Two Wire Line ... May-05, 07, 08, Dec.-15, 17, Marks 16

1.13 Flux Linkages of One Conductor in a Group

1.14 Inductance of Composite Conductor Lines .... Dec.-09,14, May-12, … Marks 10

1.15 An Alternative Approach for Finding the Expression for Inductive Reactance

1.16 Flux Linkages in Parallel Current Carrying Conductors

1.17 Inductance of Three Phase Lines with Equilateral and Symmetrical Spacing … Oct.-O1, Dec.-13, … Marks 2

1.18 Inductance of Transmission Line with Unsymmetrical Spacing … Dec.-04, May-06, 13, … Marks 16

1.19 Inductance of Three Phase Line with Unsymmetrical Spacing …. May-04,05, 06,10,17, … Dec.-04,16,      Marks 16

1.20 Inductance of Three Phase Lines with more than One Circuit

1.21 Inductance of Three Phase Double Circuit with

Unsymmetrical Spacing but Transposed .... April - 2000, Dec.-08, … May-01, 10, 13,18, .... Marks 10

1.22 Inductance of Three Phase Double Circuit with Symmetrical Spacing .... May-05,15,16, Dec.-11,13, ... Marks 16

1.23 Inductance of Bundled Conductor Lines

1.24 Capacitance of Transmission Line

1.25 Electric Potential at Single Charged Conductor

1.26 Potential at a Conductor in a Group of Charged Conductors

1.27 Capacitance of Single Phase Line ... Dec.-09,10,11,12, ... May-12, 13 Marks 8

1.28 Effect of Earth on Capacitance of Transmission Line .... April-99, May-08, .... Marks 16

1.29 Capacitance of a Three Phase Line with Equilateral Spacing ... May-06, 07, 18, Dec.-07, 08, Marks 8

1.30 Capacitance of a Three Phase Line with Unsymmetrical Spacing ... May-05, 06, 11, 16, Dec.-05, 10, ... 14,15,16,17,    Marks 16

1.31   Effect of Earth on Capacitance of Single Circuit Three Phase Line with Transposition ... April-98,  .... Marks 15

1.32 Capacitance of System with Bundled Conductors ... Dec.-14, May-18, ... Marks 8

1.33 Capacitance of Three Phase Line with More Than One Circuit ... Oct.-01, May-04,      ... Marks 15

1.34 Cahpacitance of Three Phase Double Circuit with Unsymmetrical Spacing but Transposed ... Dec.-03, May-12, .... Marks 16

1.35   Inductive Interference with Neighbouring Circuits ... Dec.-04,05,11,13, ... Marks 8

1.36 Skin Effect ... Dec.-04, May-05, 12, ... Marks 8

1.37 Proximity Effect ... Dec.-04, 08, May-05, 12, ....  Marks 8

1.38 Electrical Parameters ofEVM Lines

1.39 Two Marks Questions with Answers