Method of single end distance measurement of power transmission line malfunction based on traveling wave inherent frequency extraction
A technology of transmission line and natural frequency, which is applied in the field of single-ended distance measurement of transmission line faults, and can solve problems such as distance measurement error, misjudgment, and deterioration of measurement accuracy
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[0039] A specific implementation of the present invention is that the specific implementation steps of the single-ended fault location method for transmission line faults based on natural frequency extraction of traveling waves are as follows:
[0040] A. The preprocessing fault recording device collects the fault current traveling wave signal from the transmission line and sends it to the host. After filtering, the phase-to-analog conversion is performed. According to the fault type of the tested transmission line system, the fault current traveling wave mode signal of the transmission line is obtained. ;
[0041] B. Principal component frequency extraction adopts the spectrum estimation method of multi-signal classification to extract the natural frequency and principal component frequency f of the traveling wave mode signal x of the fault current of the transmission line 1 ;
[0042] C, single-ended ranging
[0043] C1. Calculate the principal component frequency f ...
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