HU WEI-TAO. Improving Measurement Accuracy of Dielectric Loss and Capacitance of 500 kV CVT without Removing HV Lead. [J]. Power capacitor & reactive power compensation, 2011, 32(6): 69-73.
HU WEI-TAO. Improving Measurement Accuracy of Dielectric Loss and Capacitance of 500 kV CVT without Removing HV Lead. [J]. Power capacitor & reactive power compensation, 2011, 32(6): 69-73. DOI: 10.14044/j.1674-1757.pcrpc.2011.06.015.
Test without removing wire refers to pre-test of electrical equipment without removing lead and its advantage is in reducing amount of work
increasing safety factor and improving working efficiency.For reducing the equipment damage due to removal of HV lead and improving maintenance efficiency
the operation and maintenance utilities strongly recommend application of field test without removing HV lead.In view of structure feature of 500 kV integral type CVT consisting of capacitive voltage divider and electromagnetic unit.In this paper
a new method for testing dielectric loss and capacitance of capacitive voltage divider without removing high voltage(HV) lead is introduced and test principle is analyzed.Through comparison with the test data of removing HV lead
this method is proved to be correct.
关键词
电容式电压互感器(CVT)不拆引线介损因数tanδ电容量
Keywords
capacitor voltage transformer(CVT)HV lead not removeddielectric loss factor tanδcapacitance