De-icing technology for overhead transmission line

An overhead power transmission line and ice-melting technology, which is applied in the direction of overhead installation, electrical components, cable installation, etc., can solve problems such as line breakage, tower overturning, damage to wires, iron towers and hardware, etc., to suppress the generation of overvoltage, Effect of reducing power demand and satisfying equipotential bonding

Inactive Publication Date: 2009-05-13
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the increased ice load on the conductors, it will cause certain mechanical damage to the conductors, iron towers and fittings. When the ice is severe, it will cause the lines to break and the towers to overturn, resulting in large-scale power outag...

Method used

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  • De-icing technology for overhead transmission line
  • De-icing technology for overhead transmission line
  • De-icing technology for overhead transmission line

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Embodiment Construction

[0026] Attached below figure 1 , figure 2 , image 3 , Figure 4 , The present invention will be described in further detail.

[0027] See figure 1 The switch device of the present invention is installed on the tension tower between the ice-melting circuit and the non-ice-melting circuit, suspended under the connecting plate of each phase conductor, the jumper is disconnected, and the switch device is connected in series.

[0028] See figure 2 , The working principle of ice melting in the present invention is: install CT and induction coil on the non-melting side wire, CT is used to detect the load current of the line, and the induction coil is used to extract energy from the line load. The switch device controls the on and off of the switch groups A1, A2, A3, and A4 according to the load current detected in real time and the embedded melting current control strategy. If A1 is closed, A2, A3, and A4 are disconnected, the split wire A1 will be melted; if A1, A2 are closed, and ...

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Abstract

The invention relates to an AC/DC overhead transmission line ice-melting technology which adopts split-phase conductors. When a line needs ice-melting, the load current which is evenly distributed in every split-phase conductor under normal conditions is transferred to one or more split-phase conductors; and when the centralized single conductor has the load current to a certain extent, the ice on the conductor can be melted. The deicing purpose can be realized by adopting the alternate switching manner by melting the ice on other split-phase conductors in sequence. If the manner is adopted before the line is iced, the purpose of line-icing prevention can be achieved.

Description

Technical field [0001] The invention relates to an overhead power transmission line ice melting technology, which is suitable for the ice melting of an AC and DC overhead power transmission line using split conductors. Background technique [0002] The icing of overhead transmission lines in winter is one of the natural disasters of the power system. Due to the increased ice load on the wires, certain mechanical damage will be caused to the wires, iron towers and fittings. If the icing is severe, the wires will break and the tower will overturn, leading to a large-scale power outage. Because the accident occurred in severe winter, heavy snow blocking the mountain, or freezing of the road, the conditions for emergency repairs were very difficult, resulting in long-term power outages and heavy losses to the national economy. [0003] At present, the ice melting technology of overhead transmission lines at home and abroad can be mainly divided into three types: mechanical deicing me...

Claims

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Application Information

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IPC IPC(8): H02G7/16
Inventor 刘开培阮江军
Owner WUHAN UNIV
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