To improve the existing fault location methods in double-ended transmission network

a novel method based on transient traveling wave line model time is presented

which avoids the influence of traveling wave speed. On the basis of researching the principle of double-ended traveling wave fault location and the fault location methods for T-type transmission lines in-depth

a discriminant method based on fault distance equation via using line model time and three lines’ inherent relationship to achieve fault branch discrimination and fault location accurately which is different with traditional methods is put forward. Only initial travelling wave is used to identify fault in proposed method. Reliability and high precision are validated by ATP/EMPT simulation results.