Single-terminal fault location based on atomic decomposition and natural frequency of traveling wave

An algorithm based on the atomic decomposition and the natural frequency of traveling wave is proposed for single-terminal fault location. In the first turn, the fault current is processed by a FIR filter to obtain its main natural frequency component and an approximate value of its main natural frequency is identified by an atomic decomposition algorithm; in the second turn, the parameters of that FIR filter are adjusted according to the approximate value of main natural frequency and its accurate value is obtained by the identification of that atomic decomposition algorithm, which is then used to locate the fault. The results of simulation with EMTP and MATALB show that, immune to the transition resistance, fault type and fault distance, the proposed method has higher fault locating accuracy and reliability.