Influence of Operating Environment on Harmonic Transfer Characteristics of CVT

Abstract

In order to obtain the influence of operating environment factors on the harmonic transfer characteristics of capacitive voltage transformer (CVT), this paper establishes the high-frequency equivalent model of 35kV capacitive voltage transformer, and uses the equivalent transformation method to transfer function and simplify the solution; under the influence of different environmental factors, theoretically analyze the impact of environmental factors on the internal structure of CVT. Based on the MATLAB simulation platform, the variation law of CVT transmission characteristics under environmental changes is simulated and analyzed. It is found that the temperature mainly affects the inductance value, main capacitance value and stray capacitance value of the CVT compensation reactor; the frequency offset mainly causes the CVT output to shift, which affects the harmonic transfer characteristics of the CVT.