A New Ferro-resonance Harmonic Eliminator Based on IGBT in Distribution Network

This paper provides the Ferro-resonance Low Voltage Harmonic Eliminator method that triangle of PT open mouth links with IGBT integrated device. When fractional resonance occurs in power grid, there will be L, C voltage resonance in inner device. It also triggers IGBT after transformer coupling paraphrases. At this time, triangle of open mouth is integrated with damping resistance and the strong damping effect makes ferro-resonance quickly weaken. Afterwards, IGBT reverts to blocking-up state, which reaches the effect of repressing ferro -resonance. And the open triangles disconnected recovery. Cast controlled IGBT based suppression device, the inputs can be selectively different damping resistor, to the best of ferromagnetic resonance suppression. The new type of harmonic eliminator device was stronger than computer harmonic eliminator device in timeliness and reliability, thus more widely applicable.