Analysis of 220kV Main Transformer Screens Dendritic Discharge Fault

Abstract

Abstract. Through folding screen of dendritic discharge in Fushun Power Supply Company 220kV Gongnong Station, this paper folding screen in the basic process of dendritic discharge fault, argument insulation be affected with damp be affected with damp and gas are the main external cause the folding screen dendritic discharge fault; Insulation structure defects are the main internal cause folding screen dendritic discharge fault. Combined with the actual finally puts forward the measures to prevent the folding screen dendritic discharge fault.

Research on the Test Method of Machining Stress Based on the Instrumented Indentation Test

“…A series of domestic and overseas research have been conducted to investigate the effects of machining parameters on working stress [4]. Lots of residual stress measurement methods have been developed at present, familiar ones are hole drilling method and X-ray diffraction method [5]. But these methods have certain damages to the specimen and they are relatively difficult to implement.…”