A novel single-ended travelling-wave fault location method based on reflected wave-head of adjacent bus

As the single-ended travelling-wave fault location method is cost-effective and there is no need for a synchronization device, it has been widely researched and discussed. However, the major problem is the identification of the reflected wave-head caused by the fault point. The reflected surge from the adjacent bus usually has the same polarity as the real fault point's reflected wave-head, so confusion is inevitable. In this presentation, a novel single-ended traveling wave fault location approach is proposed. The new method contains two major steps: firstly, a wave-head comparison method is used to identify the adjacent bus's reflected wave-head (ABRW) from the real fault-point's reflected wave-head (RFRW). Then the intervals between line-modal and ground-modal of both ABRWs and the initial wave-heads (IWs) are used to give the exact fault distance. A simulation system based on EMTP (Electromagnetic Transients Program) is built, and abundant simulation results have validated the effectiveness of the proposed method.