AN IMPROVED CONTROL SCHEME FOR A SERIES-CAPACITIVE REACTANCE COMPENSATOR BASED ON A VOLTAGE-SOURCE INVERTER

Power utilities have traditionally used series capacitors to increase the power transfer capability of transmission Lines, but their widespr ead use has been limited by concerns for the harmful effects of series resonances. An advanced, controllable series compensator has the pote ntial to avoid such problems and, therefore, allow more efficient use of existing transmission plant, This paper describes a modified contro l scheme for an advanced series compensator based on a single voltage- source inverter, Practical results from a working prototype demonstrat e the ability of the compensator to provide a rapidly controllable mag nitude of compensation.