What happens when the capacitive reactance of a transmission line is very high?

When capacitive reactance of transmission line is high then more charging current will flow through line then losses will increases and due to capacitive effect receiving end voltage high the sending end voltage. and voltage distribution is goes unequal.

This is otherwise called the ferranti effect. This causes the receiving end Voltage to be greater than the sending end Voltage.

This effect is primarily known as Ferranti effect & due to which the receiving end voltage will be greater than the sending end voltage (about 5-10% of Vs).