Cost Optimal Design of a Power Inductor for VAR Compensation in EHV Line

The paper presents the procedure for finding out inductive compensation required for an EHV transmission line at its terminals. It also presents the design methodology for the power inductor. The 3-phase power inductor is similar in construction to a 3-phase core-type transformer with the exception that it has only one winding per phase and each limb is provided with an air-gap, the length of which is decided upon by the inductance required.

Shunt compensation at the load end of a long transmission line for maintaining the load voltage at a fixed percentage of the sending-end voltage. Long-line model is used to determine the critical power that the line can transmit with and without series compensation.