A method and system for determining cable location based on cable length
A cable length and cable technology, which is applied in the electric power field, can solve the problem of inability to quickly locate the cable length, and achieve the effect of speeding up the search speed, accurately determining the point, and facilitating the search.
Active Publication Date: 2022-02-22
WUHAN SUNSHINE POWER SCI & TECH
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Problems solved by technology
[0007] The present invention provides a method and system for determining the position of a cable based on the length of the cable, so as to solve the problem that the existing technology cannot quickly locate according to the length of the cable
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[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0049] An embodiment of the present invention provides a method for determining the position of a cable based on the length of the cable, such as figure 1 shown, including the following steps:
[0050] In step 101, a traveling wave is coupled and injected into the cable sheath from a test point on the cable, and the traveling wave is transmitted to the head end and the end of the cable.
[0051] Among them, a coupled traveling wave generator is installed near...
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The invention discloses a method and system for determining the position of a cable based on the length of the cable. The method comprises the following steps: coupling and injecting a traveling wave from a test point on the cable into the cable sheath, and transmitting the traveling wave to the head end and the end of the cable; obtaining The time difference between the traveling wave arriving at the head end and the end of the cable respectively; according to the time difference and the wave speed of the traveling wave in the cable, determine the cable length between the test point and the head or end of the cable; when the cable length is the target length, Determine the location of the test point as the target location. By injecting pulses along the line, the present invention can obtain the distance between the test point on the cable and the cable end point, associate the cable position with the cable length, realize the convenient search of the position corresponding to the fault distance measurement length, and solve the problem of the relationship between the cable length and the actual laying position of the cable There is no associated problem, which speeds up the search speed of fault location, and can accurately locate the fault point without applying high voltage on the cable to break down the fault point.
Description
technical field [0001] The invention relates to the field of electric power technology, in particular to a method and a system for determining the position of a cable based on the length of the cable. Background technique [0002] With the development of power technology, the demand for cable fault detection is increasing. At present, cable fault detection mainly relies on offline location methods, including two steps of fault location and precise location. Fault location includes wave reflection method based on traveling wave and bridge method based on power frequency. Among them, wave reflection method (also known as pulse reflection method) mainly includes low-voltage pulse method, pulse current method, secondary pulse method and stable arc reflection method; bridge method mainly includes low-voltage bridge method and high-voltage bridge method. [0003] In the prior art, after the fault distance measurement is completed, the precise positioning is carried out. The speci...
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IPC IPC(8): G01R31/11G01R31/08G01B21/02
CPCG01R31/11G01R31/083G01B21/02Y04S10/52
Inventor 余刚华陈沛琳胡枫赵纯马波
Owner WUHAN SUNSHINE POWER SCI & TECH