Effects of CCVT stray capacitances on traveling wave-based applications

•Novel sensitivity analyses of CCVT responses with stray capacitances are performed.•Investigation on the performance of one- and two-ended TW-based fault locators.•Analysis of the feasibility of CCVT compensators considering stray capacitances.•Point out the need of stray capacitances in CCVT models for time-domain studies. In this paper, the effects of stray capacitances that may appear on the coupling capacitor voltage transformer (CCVT) during field operation are addressed. Those stray capacitances are usually ignored in the existing limited frequency bandwidth CCVT digital models reported in the literature. A sensitivity analysis is carried out to evaluate how the equipment magnitude and phase frequency responses can be affected when such capacitances are taken into account. Besides, the feasibility of classical CCVT transient response compensators is analyzed in these scenarios. The impact of these features is investigated on the performance of one- and two-ended traveling wave (TW)-based fault location techniques. The obtained results attest that the presence of the stray capacitances improve the performance of two-ended TW-based fault locators, but the classical CCVT compensator may not accurately reproduce the voltage TWs.