The Improved Method for the Inductive Voltage Endurance Test of Potential Transformer Used in GIS
Yi Li · Gaoya dianqi · 2010
During the on-site inductive voltage withstand test of Potential Transformer(PT)used in Gas Insulated Station(GIS),there is a problem with the over current of the used second winding of the PT.According to the analysis of the construction of PT,it is the distributional capacitances that cause this over current.Thereby,an improved method for the inductive voltage withstand test of PT was presented in this paper.The method resolves the problem of the over current,by adding the induction load to the other second windings.Meanwhile the value of the induction load was also calculated for the PT of different rated voltage from 110～500 kV.This method resolves the practical problem and is useful to the on-site testing.