Contactless OLTC Technology Based on Inductive Load

Abstract

This paper studies the fast On-Load Tap Changer (OLTC) technology of contactless switch without transition resistance or transition reactor. It not only provides the equivalent circuit of OLTC, the impact current calculation formula and the OLTC simulation waveform based on the inductive load but also supplies with the main electrical circuit and the waveform recorded in the experiments. The MJN3 contactless voltage-controlled power source has been developed with MCT801D intelligent module, which can accomplish to rapidly switch in voltage-controlled gears based on the inductive load. Its output current is continuous with no impact, no over-voltage and voltage-drop, which can achieve the high performance and high reliability.