Question

Why receiving end voltage of an unloaded line may be more than the sending end voltage?

Answer 1

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answer:-In medium and long transmission lines, if the Capacitive VAR dominates over the Inductive VAR during no load or lightly loaded conditions, the Receiving end Voltage is found to be more than the Sending end Voltage. ... Usually this effect is prominent when a long transmission line is lightly loaded/unloaded.......

Answer 2

The effect in which the voltage at the receiving end of the transmission line is more than the sending voltage is known as the Ferranti effect. Such type of effect mainly occurs because of light load or open circuit at the receiving end. Ferranti effect is due to the charging current of the line.