Contents
Why is transmission line inductive?
In addition to the ohmic resistance in the wires and electric conductors, conductors carrying AC electricity have inductive and capacitive effects. Thus, the two conductors form a capacitor. The same thing is true for the magnetic effect of the current in each conductor on itself and on the other conductor.
Why does current flow through a capacitor?
Applying DC voltage on the capacitor no conduction current flows through the capacitor if its insulating medium is perfect insulator. This is because ther are no free charge carriers in such medium. This current is termed also the capacitive current. It flows because of changing electric displacement D with time.
Why resistance is ignored in transmission line?
The distances between conductors of transmission lines are big. The distances between conductors of cables in distribution systems are very small and their conductor square could be equal to that of transmission lines. Therefore the inductivity is small also and the ratio R/X is bigger than that of transmission lines.
Why does a transmission line have inductance in it?
Reason of Transmission Line Inductance Generally, electric power is transmitted through the transmission line with AC high voltage and current. High valued alternating current while flowing through the conductor sets up magnetic flux of high strength with alternating nature.
How to calculate the capacitance of a transmission line?
The capacitance of a single-phase transmission line is given by (see derivation in the book): (ε = 8.85 x 10-12 F/m) Capacitance of 3-phase transmission line Remarks on line capacitance The greater the spacing between the phases of a transmission line, the lower the capacitance of the line.
How are three conductors in a transmission line?
In the three phase transmission line, three conductors are parallel to each other. The direction of the current is same through each of the conductors. When they carry the current of the same magnitude “I”, they are in flux linkage with each other. Now, let us consider a point P near three conductors.
How is electricity transmitted through a transmission line?
Generally, electric power is transmitted through the transmission line with AC high voltage and current. High valued alternating current while flowing through the conductor sets up magnetic flux of high strength with alternating nature.