Double-circuit on same tower double-circuit line fault distance measurement method
A double-circuit line and fault location technology, which is applied in the direction of the fault location, can solve the problem that the distance measurement accuracy of the traveling wave length cannot be guaranteed and the reliability of the distance measurement cannot be well guaranteed.
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[0045] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0046] Such as figure 1 A method for fault location of double-circuit lines paralleled on the same pole is shown. In view of the characteristics of electromagnetic coupling between phases and lines of double-circuit lines paralleled on the same pole, the three-phase double-circuit line is regarded as a six-phase line. The six-sequence transformation is used for phase-mode transformation, and the atomic decomposition method is used to extract the current modulus traveling wave head when a fault occurs at both ends of the line, and the fault location is calculated by the time difference between the traveling wave head and the two ends of the measurement point. The implementation process includes the following steps:
[0047] (S1) Denoise the sampled double-circuit three-phase transient current as the original current signal, including t...
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