A new scheme of arcless onload voltage regulation using high power electronic switch is put forward based on the relative technology experiences. According to the development of power electronics technology

two schemes of arcless on-load voltage regulation for high voltage and low voltage distribution transformers are introduced respectively. The waveforms of simulation experiment are also given. On-load voltage regulation control system with monolithic computer as the core for the scheme is built and the experiment on low voltage model proved that arcless onload voltage regulation could be carried out quickly and reliably by its control system in the new scheme.