Shielding Method for Measuring UHV Transformer Single-Set Coil Capacitance and Dielectric Loss
1 000 kV transformer is the core equipment of 1000kV AC UHV substation,and the on-site acceptance test has an important significance to ensure its safe operation.The conventional test on single-set coil capacitance and dielectric loss is to test the coil and casing,which requires the whole equipment disconnected with the ground.Therefore this paper introduces the shielding method for measuring 1000kV UHV transformer single-set coil capacitance and dielectric loss.