22-06-2012, 05:07 PM
Seminar on Ferranti Effect
Ferranti Effect.pdf (Size: 41.34 KB / Downloads: 403)
A long transmission line draws a substantial quantity of charging current. If such a line is open
circuited or very lightly loaded at the receiving end, the voltage at receiving end may become greater
than voltage at sending end. This is known as Ferranti Effect and is due to the voltage drop across the
line inductance (due to charging current) being in phase with the sending end voltages. Therefore both
capacitance and inductance is responsible to produce this phenomenon.
The capacitance (and charging current) is negligible in short line but significant in medium line and
appreciable in long line. Therefore this phenomenon occurs in medium and long lines.