Abstract
Capacitor voltage transformer (CVT), which is with simple structure, convenient maintenance, functional diversity and high impact pressure strength, is widely used. And its capacitance and dielectric loss Angle measurement is an important test on testing the insulation of the equipment. This paper is mainly to introduce and discuss one of the CVT test methods——the “self excitation method”, combined with the actual situation encountered in the work, sums up and expounds the maintenance of CVT and preventive test of influence factors.
Highlights
In recent years, the capacitive voltage transformer is widely used, because of insulation structure reasonable, high dielectric strength, can make full use of the carrier communication required for the coupling capacitor, in more than 110kV voltage grade [1].2
Capacitor voltage transformer (CVT), which is with simple structure, convenient maintenance, functional diversity and high impact pressure strength, is widely used
Capacitive voltage transformer, which is set as a converting device between the high tension line and ground, is to drop the system voltage into medium first, and after converting secondary voltage through intermediate transformer, the voltage will be output to the measuring instrument and relay protection device [2]
Summary
The capacitive voltage transformer is widely used, because of insulation structure reasonable, high dielectric strength, can make full use of the carrier communication required for the coupling capacitor, in more than 110kV voltage grade [1]
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