In this article we will discuss about the determination of inductance for overhead transmission lines. Inductance is the property by virtue of which a circuit opposes changes in the value of a varying current flowing through it. While the resistance of a circuit opposes the flow of both steady as well as varying currents, the inductance causes opposition only to [...]
In this article we will discuss about the capacitance of overhead transmission lines. We know that any two conductors separated by an insulating medium constitute a condenser or a capacitor. In case of an overhead line two conductors form the two plates of a capacitor and the air between the conductors behaves as the dielectric medium. Thus an overhead line [...]
In determination of capacitance of transmission lines, the presence of earth is ignored. But it is not true; the presence of earth affects the electric field of a line and so the capacitance. The effect of earth on capacitance can be modelled by the method of images. The electric field of too long, parallel conductors having charge +q and -q [...]