The double terminal fault location method of traveling waves is simple

but the result is not accurate enough

which is caused by the uncertainty of wave speed

the arc of transmission line and the time errors of traveling wave. Based on the conventional double terminal fault locating algorithm

an accurate fault locating algorithm is presented

which avoids the influence of traveling wave speed and transmission line arc. The new algorithm can be done by using the arriving times of the traveling wave from the fault location

reflected wave from fault location and reflected wave from opposite bus. The new fault location algorithm is tested in real power system

and the results show that it has high accuracy.