Improved double-ended traveling wave ranging technology for DC distribution cable lines

Abstract This paper analyses the main factors affecting accuracy of double-end traveling wave ranging for high precision fault on cable lines in DC distribution networks, and points out that method segmented cables based uniform velocity is source errors. Then, an improved refined proposed. Based linear relationship between time difference location at both ends cable, measured segmental used to form a function derive accurate results. PSCAD simulation experiments demonstrate proposed significantly improves accuracy.