The equivalent parameter of capacitor element of CVT will be changes the operation of equipment due to the influence of such factors as ambient temperature

insulation moisture and aging etc

resulting in metering error of CVT.In this paper

a capacitor element test platform and a CVT simulation platform are built to study the influence rule of ambient temperature

insulation moisture and aging on the equivalent electrical parameter of the capacitor element and the metering accuracy of CVT.It is shown by the simulation and test results show that rise of temperature and increase of moisture and aging lead to the decrease of the c apacitance and increase of dielectric loss of c apacitor element of VCT.Moreover

both ratio and angular error of the CVT increase with the temperature as well as the increase extent of moisture and aging.