Abstract
The paper presents a method for identify fault section in distribution network, which uses the traveling wave data recorded at the substation only. After modal transformation, the aerial mode component is in stable velocity and low attenuation and utilized in the method. Compared to the first wave head, subsequent wave heads of aerial mode component have some particular characteristics with time delay and wavelet transform modulus maxima (WTMM) ratio. The number of characteristic wave heads (CWHs) which are judged by characteristic time delays (CTDs) is the criteria to identify the fault section. The simulation results verify that the method has high accuracy.
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