For obtaining the influence of operation environment factors on the harmonic transfer characteristics of capacitive voltage transformer（CVT）

the high-frequency equivalent model of 35 kV capacitive voltage transformer is set up

and the equivalent transformation method is used for simplified solution of transfer function.Under the variation of different environmental factors

the influence of environmental factor on the internal structure of CVT is analyzed theoretically.The variation law of CVT transfer characteristics under environmental changes is simulated and analyzed on the basis of Matlab simulation platform.It is found that both ambient temperature and frequency can have influence on the harmonic transfer characteristics of CVT and the influence on the harmonic transfer ratio of CVT is bigger.The temperature mainly affects the inductance value

main capacitance value and stray capacitance value of CVT compensation reactor.The frequency shift mainly causes the output deviation of CVT

which affects the harmonic transfer characteristics of the CVT.