The two models were systematically compute for analysis and comparison,the result not only proves the acceptable of the loaded model but also reveal the particularity of screen amplitude.

A transformer with on-load voltage regulation was equipped with to restrain the worsening trend and avoid emergency events when the transformer s tap changer did not function well.

In order to make shift capacity raised continuously and more completed in arc extinction method,based on serious analysis and summary and wide investigations for arcless on-load voltage regulation technology both at home and abroad,techni-cal plan with power electronic switch was raised as the key part of arcless on-load voltage regulation.