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Method for removing accumulated snow on high-altitude power transmission lines

A high-altitude transmission line and transmission line technology, applied in the installation of cables, electrical components, overhead installation, etc., can solve the problems that the transmission line cannot supply power normally, affect production and life, etc., and achieve obvious stability and reliability.

Inactive Publication Date: 2014-12-10
马根昌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when this method melts snow, the power transmission line cannot supply power normally, which greatly affects people's production and life.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The rain and snow sensor includes a pair of fixed opposite optocouplers, which take power from the transmission line through the transformer, and when the receiver in the optocoupler receives the optical signal from the transmitter in the optocoupler, it passes through a NOT gate The circuit sends a signal of no snow and ice represented by a low level to the controller of the on-load tap changer; otherwise, it sends a signal of snow and ice represented by a high level. The transmitter can emit a light signal every tens of seconds or even minutes. The rain and snow sensor is set on the transmission line, and the surface between the optocouplers is in thermal contact with the transmission line. In this way, the snow accumulation between the optocouplers and the snow accumulation on the transmission line can be melted synchronously, so that the accumulation on the transmission line When the snow melts away, the optocoupler just restores the communication of the optical sig...

Embodiment 2

[0027] The rain and snow sensor includes a plastic corrugated tube sleeved on the power line; an induction coil is wound on the surface of the corrugated tube; and a miniature microphone, which is sequentially connected with a 50Hz detector and an audio analysis module; When the audio analysis module obtains 50 Hz audio, it sends a low-level snow-free signal to the controller of the on-load tap-changer through a NOT gate circuit, otherwise it sends a high-level ice-snow signal.

[0028] The working principle of the rain and snow sensor in this embodiment is: when the bellows is not covered by ice and snow, since the surface is wound with an induction coil, and under the action of 50Hz alternating current, the induction coil will drive the bellows to continuously generate vibration with a frequency of 50Hz , the vibration is captured by the micro-microphone together with the ambient noise, and detected by the 50Hz detector, as the basis for judging the state of no ice and snow; ...

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Abstract

The invention provides a method for removing accumulated snow on high-altitude power transmission lines. The method includes measures of connecting various sections of power transmission lines with one another by load tap switches; enabling controllers of the load tap switches to control the load tap switches to act in a certain mode when ice and the snow cover the power transmission lines, to be more specific, sorting a plurality of groups of power lines in the ice and snow covered sections of power transmission lines, and sequentially and alternately concentrating total currents in the sections of power transmission lines into one of the groups of power lines until the ice and the snow which cover the various groups of power lines are melted. The method has the advantage that normal power supply of the power transmission lines to users can be unaffected in snow melting procedures.

Description

[0001] technical field [0002] The invention relates to the field of power facility construction, in particular to a method for eliminating snow on high-altitude transmission lines. [0003] Background technique [0004] The high-altitude power line is the basic power facility for remote power transmission; during the power transmission process, it needs to withstand the climate test of various regions, for example, in some cold mountainous areas, the high altitude where the transmission line is located has extremely cold temperatures and often encounters rain Weather, at this time, the surface of the transmission line is very easy to accumulate snow and ice, resulting in a sharp increase in the weight of the transmission line, and then the power line is likely to break and fall when the wind blows. The current high-altitude power lines are twisted by steel wires, and basically all face this problem, which causes great troubles for the electric power construction departmen...

Claims

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Application Information

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IPC IPC(8): H02G7/16
Inventor 马根昌
Owner 马根昌
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