This paper presents an orthogonal-core type series compensator for a power
flow control in an electric power system. The orthogonal-core type series c
ompensator is constructed with the variable inductors using the orthogonal-
cores and capacitors. For reduction of harmonic currents, the orthogonal-co
re utilizes wedge gaps and third windings. The orthogonal-core type series
compensator is able to control the active power and its flow direction.