Novel active filter system composed of inverter bypass circuit for suppression of harmonic resonance at the Yamanashi Maglev test line

The authors have developed and proposed a novel active filter system composed of an inverter bypass circuit for the suppression of harmonic resonance conditions caused between the inductance behind the load bus and the capacitance of VAr equipment, especially at lower harmonic frequencies. They have installed this new harmonic compensation system in combination with TCR-type SVC and shunt LC filters at the Yamanashi Maglev test line. Here, they describe the outline of the reactive power and harmonic compensation systems, and harmonic resonance test results which show satisfactory performance of the active filter.