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Ground wire DC (direct current) deicing method based on discharge gap insulator

A DC ice melting and discharge gap technology, applied in cable installation, electrical components, overhead installation, etc., can solve problems such as inability to implement ice melting, improve efficiency and safety, reduce system capacity, and avoid tower breakdown and disconnection Effect

Inactive Publication Date: 2013-09-11
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a DC deicing method for ground wires based on discharge gap insulators, aiming at the defect that current overhead ground wires cannot be thawed due to the limitations of segmental insulation or direct grounding operating conditions. , when the overhead ground wire is ice-covered, this method can be used to implement DC icing, thereby improving the ability of the overhead ground wire to resist freezing from rain and snow, and ensuring the safety of the overhead ground wire under severe icing conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Enter the area where the ice-melting transmission line is located and search for the ice-covered overhead ground wire of the transmission line in the area;

[0023] (2) A piece of insulator is connected in series between the ice-coated overhead ground wire searched in step (1) and the transmission line tower, so that the ice-coated overhead ground wire is transformed into an insulated overhead ground wire;

[0024] (3) A fitting is connected in parallel between the insulator of the insulated overhead ground wire obtained in step (2) and the iron tower of the transmission line described in step (2);

[0025] (4) Short-circuit the ends of the secondary insulated overhead ground wires of the discharge gap generated in step (3);

[0026] (5) Equipped with a DC ice-melting device. Connect one of the two insulated overhead ground wires in step (3) to the positive pole of the DC ice-melting device, and the other insulated overhead ground wire to the negative pole of the D...

Embodiment 2

[0033] Steps (1) to (2) are the same as in Example 1;

[0034] (3), a lightning arrester is connected in parallel between the insulator of the insulated overhead ground wire obtained in step (2) and the iron tower of the transmission line described in step (2);

[0035] Steps (4) to (10) are the same as in Example 1.

[0036] The above-mentioned method for melting the ice of the ground wire based on the discharge gap insulator has been proved to have a good melting effect, fully meets the design expectation, and is easy to operate. Using this method to carry out the icing work of the overhead ground wire can effectively implement the icing of the overhead ground wire, improve the overall anti-icing ability of the transmission line, and ensure the safety and reliability of the power grid.

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PUM

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Abstract

The invention provides a ground wire DC deicing method based on a discharge gap insulator. The ground wire DC deicing method based on the discharge gap insulator comprises the steps of (1) searching an ice-covered overhead ground wire; (2) connecting a piece of insulator between the overhead ground wire and an iron tower in series; (3) connecting a fitting or an arrester between the insulator and the iron tower in parallel; (4) shortcircuiting the tail end of a double-circuit insulation overhead ground wire of a discharge gap; (5) configuring a DC deicing device; (6) disconnecting the grounding of a head end and a tail end of the insulation overhead ground wire; (7) starting the DC deicing device; (8) closing the DC deicing device during ice shedding; (9) disconnecting and grounding the double-circuit insulation overhead ground wire; and (10) disconnecting and grounding the shortcircuited tail end of the double-circuit insulation overhead ground wire. The ground wire DC deicing method based on the discharge gap insulator has the advantages of effectively avoiding line breaking and tower collapse, improving the efficiency and the safety of ground wire deicing and greatly reducing the system capacity required by deicing.

Description

technical field [0001] The invention belongs to the technical field of electrical engineering, and in particular relates to a ground wire DC ice-melting method based on a discharge gap insulator. Background technique [0002] In recent years, ice disasters have occurred frequently in the power system, and the phenomenon of downed towers and broken lines of transmission lines has been serious, which has brought huge economic losses to our country and seriously affected people's production and life. [0003] The use of the ice-melting device has completely changed the situation in which transmission lines could only passively resist ice in the face of ice disasters, alleviated the disaster situation, and prevented tower collapse and line disconnection accidents. However, it should be pointed out that at present, ice melting is mainly carried out on wires, and ground wires cannot be melted due to the use of segmented insulation or direct grounding and limited operating conditio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G7/16
Inventor 陆佳政李波谭艳军方针张红先赵纯
Owner STATE GRID CORP OF CHINA
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