How does a series reactor influence transmission line impedance?

A series reactor is a type of inductive component that is connected in series with a transmission line. Its primary function is to increase the overall impedance of the line. When a series reactor is introduced, it adds inductive reactance to the system.

This additional reactance affects the flow of current and the voltage profile along the transmission line. By increasing the line's overall impedance, the series reactor helps to limit current during fault conditions, contributing to system stability and enhancing the safety of the transmission network.

It is important to understand that the series reactor does not eliminate impedance or keep it constant; rather, it serves to effectively raise it, which can be beneficial in managing power flow and preventing overloads in the system. This feature is particularly crucial in areas where power transfer levels are high and where stability under varying load conditions is necessary.