Geographic information calibration method for strain tower in overhead transmission line

Abstract

The invention discloses a geographic information calibration method for a strain tower in an overhead transmission line. A system for realizing the method comprises optical fiber sensing equipment sensitive to vibration, a low-power-consumption vibrator and a GPS device. According to the invention, the optical fiber sensing equipment sensitive to vibration is utilized; the working time of the optical fiber sensing equipment and the working time of the vibrator on the strain tower are synchronized through the GPS device; the position where vibration occurs is judged; the relationship between the geographical coordinates of the strain tower and the length of the optical cable from the strain tower to the optical port of the equipment can be easily calibrated; the GPS coordinates of the tangent towers between the strain towers and the length of the optical cable from the tangent towers to the optical port of the equipment are calculated through an interpolation method; the problem that adisturbance position detected by an optical fiber sensing system cannot be mapped to an actual geographical coordinate due to the fact that the sag of a power transmission cable and the span between towers are inconsistent with the distance of an optical cable is solved, the geographical position of a power transmission line accident is rapidly positioned, and maintenance work of related personnelis facilitated.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, and in particular relates to a geographical information calibration method of a strain tower in an overhead power transmission line. Background technique [0002] Cables in overhead transmission lines include not only cables for power transmission, but also optoelectronic composite cables such as OPGW (optical fiber composite overhead ground wire), OPLC (optical fiber composite low-voltage cable) or ADDS (all-dielectric self-supporting optical cable). The optical unit is responsible for the internal communication and data collection tasks of the power grid. There are generally two types of towers for power lines. The first is a straight tower, and the second is a strain tower. The function of a straight tower is to stir up the wires, and generally only bear the weight of the wires, that is, the vertical load. The load of the strain tower is much larger than that of the straight tow...

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: In view of the above problems, the present invention discloses a geographical information calibration method of a tension tower in an overhead power transmission line. By synchronizing the working time of the optical fiber sensing equipment and the vibrator on the tension tower with a GPS device, the location of the vibration is judged. Position, it is very easy to calibrate the relationship between the geographical coordinates of the strain tower and the length of the optical cable to the optical port of the equipment, and calculate the GPS coordinates of the st

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