on-load voltage regulation bypass switch for transformer and switch control method

摘要

"On-load voltage regulation bypass switch for transformer and switch control method". The present invention relates to an on-load voltage regulating bypass switch for a transformer comprising a main switch group, a switch contact protection branch and a switch control circuit, wherein the the main switch group comprises a plurality of switch contacts, the switch group is connected to a corresponding transformer winding tap and the other end of the switch group is connected in parallel and is then connected to a power supply; the switch contact protection branch is a series circuit formed by a plurality of diode groups and auxiliary switch contacts and is respectively connected to both ends of a corresponding main switch in parallel; and the switch control circuit is comprised of a power supply, a single chip microcomputer, and a peripheral circuit, and controls all main switches and auxiliary switches to act on a given time sequence to complete winding switching of the transformer. Compared to the existing on-load voltage regulating tap-changer, the on-load voltage regulating tap-changer for a transformer of the present invention has the advantages of a fast bypass speed with no interruption current during shunt and a current Continuous and simple operation, high reliability, small volume, lightness, low cost, etc.