Transmission and Distribution of Electrical Power

ELECTRIC POWER TRANSMISSION ................................................................................. 3
1.1 BACKGROUND ... 3
1.2 ELECTRIC TRANSMISSION LINE PARAMETERS ............................................................ 5
1.2.1 Line resistance ... 5
1.2.1.1 Frequency Effect ... 5
1.2.1.2 Temperature Effect ... 6
1.2.1.3 Spiraling and Bundle Conductor Effect ........................................................................ 6
1.2.1.4 Proximity effects ... 8
1.2.2 Inductance of a single conductor......................................................................... 10
1.2.2.1 Internal Inductance ... 10
1.2.2.2 Inductance Due To External Flux Linkage ................................................................... 11
1.2.2.3 Inductance of a two wire single phase lines............................................................... 12
1.2.2.4 Flux linkage in terms of self and mutual inductance .................................................. 14
1.2.2.5 Inductance of three phase transmission lines -symmetrical spacing- ........................ 15
1.2.2.6 Inductance of three phase transmission lines -asymmetrical spacing- ...................... 16
1.2.2.7 Transpose line ... 17
1.2.3 Inductance of composite conductors ................................................................... 18
1.2.3.1 GMR of bundled conductors ...................................................................................... 21
1.2.4 Inductance of three phase double circuit line ...................................................... 26
1.2.5 Line capacitance .................................................................................................. 33
1.2.6 Capacitance of single phase lines ........................................................................ 34
1.2.7 Potential difference in a multiconductor configuration ...................................... 35
1.2.8 Capacitance of three phase lines ......................................................................... 36
1.2.9 Effect of bundling ................................................................................................ 38
1.2.10 Capacitance of three phase double circuit lines ................................................ 38
1.2.1 Effect of earth on the capacitance ...................................................................... 39
1.2.2 Magnetic field induction ...................................................................................... 43
1.2.3 Electrostatic induction ......................................................................................... 45
1.2.4 Corona ... 45

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