Line parameter detection and data non synchronous verification-based double-end ranging method
A technology of double-ended ranging and line parameters, used in the detection of faults, fault locations, etc. by conductor type
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[0033] The technical solutions of the present invention will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.
[0034] see figure 2 , an embodiment of the present invention comprises steps as follows:
[0035] Step 1. The step of detecting the fault starting point at both ends: use the wavelet modulus maximum method to detect the fault starting point corresponding to the sampling data at both ends of the fault line.
[0036] see figure 1 , one end (left end) of the line is m-terminal, the other end (right end) is n-terminal, E m ,E n and Z m ,Z n Represent the voltage and impedance of the m-terminal and n-terminal power supplies respectively, l is the length of the line, and a short-circuit fault occurs at point f of the line. Note that the fault starting point corresponding to the detected m-terminal fault data is n m0 , the fault starting point corresponding to the n-terminal fault data is n n0 ;
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