CN202474771U - Mobile overhead ground wire direct-current de-icing system - Google Patents

Abstract

The utility model discloses a mobile overhead ground wire direct-current de-icing system, which consists of a mobile power trolley (1), a junction box (3) and an overhead ground wire (4) which are sequentially connected in series with one another through a cable (2), wherein the output end of the mobile power trolley (1) is connected with the input end of the junction box (3); and the output end of the junction box (3) is connected with the input end of the overhead ground wire (4). The system has the advantages that 1) a ground wire can be de-iced by adjusting the matching impedance of the ground wire; 2) the current is adjustable, so that the loss of the ground wire is reduced; 3) the multi-section and multi-point de-icing can be realized; 4) equipment can be moved to a field at any time; 5) the labor intensity of engineering execution is reduced; 6) the complicated problems of acquisition of power and segmental and multi-point grounding of the overhead ground wire are solved; 7) a de-icing environment is improved, and the risk is reduced; 8) the alive de-icing is realized, so that the trouble caused by power failure is avoided; and 9) other constructions and tasks based on the ground wire are not influenced.

Description

Movable type overhead ground wire DC ice melting system

Technical field

The utility model belongs to the electrical engineering technical field; Relate to a kind of portable overhead ground wire DC ice melting system; This system is applicable to the ground wire in area with a varied topography, carries out multistage, multiple spot transmission line overhead ground wire ice-melt processing, in order to reduce the electrical network ground wire fracture accident that serious icing causes.

Background technology

For a long time, freezing disaster is seriously threatening the safety of national grid system always, and with regard to the ground wire icing, accident takes place again and again.Occurred in the ice damage of southern china 35～500kV transmission line overhead ground wire, 2067 places that break like 2008 Christian eras.The fracture of transmission line overhead ground wire has caused line tripping; The paralysis of part circuit also has many electrical network communication cables to interrupt, and wherein is no lack of the communication cable that comprises in the transmission line ground wire; Brought enormous economic loss to country, brought inconvenience in life to the people.Before this; National grid is existing different ways on the ice-melt of transmission line overhead ground wire is handled; Like great current deicing, electromagnetic force or Electro-Impulse De-icing, robot deicing; But because field condition is limited, for example the job site landform too complicacy can't be directly to ground wire apply high pressure, ice-melt power supply etc. can't be obtained in the scene, makes existing deicing mode have deicing apart from defectives such as weak point, operating difficulties, security performance are low.

The utility model content

The technical problem that the utility model will solve is: can not reach effective deicing and the backward situation of deicing equipment to prior art; A kind of portable overhead ground wire DC ice melting system is provided; A kind of can be neatly, multistage, multiple spot ground are to the long ice melting system that carries out effective ice-melt apart from overhead ground wire or short distance overhead ground wire.This system and traditional ice melting system compare, and labour intensity greatly lowers, and the danger of artificial deicing also greatly reduces.

The technical solution of the utility model is, above-mentioned portable overhead ground wire DC ice melting system, and referring to Fig. 1, it is as shown in Figure 1, is composed in series in regular turn through cable 2 by portable power source car 1, junction box 3, overhead ground wire 4.The output of wherein said portable power source car 1 is through the cable 2 said junction boxes' 3 of connection input, and said junction box's 3 output connects the input of said overhead ground wire 4 through cable 2.

The operation principle of the utility model is: use the old-fashioned ground wire of overhead ground wire 4 replacements of native system to be installed on the iron tower of transmission line, and the high strength insulated copper wire of overhead ground wire 4 is linked in the ice-melt junction box who places this iron tower tower waist.Behind transmission line overhead ground wire 4 icing; The portable overhead ground wire DC ice melting system of the utility model is moved on to the scene; Through cable 2 junction box 3 is received in the direct current conveying; Make electric current form the loop, thereby make the load matched in loop realize ice-melt through the disconnecting link in the operation junction box 3 through the high strength insulated copper wire in the overhead ground wire 4.Said direct current is provided by portable power source car 1; When direct current passes through the high strength insulated copper wire in the overhead ground wire 4; Because understanding consumed power and produce heat, the resistance of copper cash itself cause thermal effect to take place; So, thereby make the temperature rising of ground wire melt the icing layer with the heat transferred ground wire.Because the direct current that provides of portable power source car 1 is adjustable continuously, therefore can guarantee the electric currents of the different sizes that ice-melt under the different condition is required, can prevent that also electric current is because of excessive damage insulating barrier or can't realize ice-melt because of too small.

The beneficial effect of the utility model is:

1), can adjust the matched impedance of ground wire through the junction box at any time, can implement ice-melt to the ground wire of different distance;

2), the DC ice melting current scope is adjustable continuously, so both effectively ice-melts can reduce the damage of ground wire again;

3), supply vehicle can move flexibly, so can carry out multistage, multiple spot ice-melt to ground wire;

4), supply vehicle capable of using moved to the scene at any time with former irremovable cumbersome apparatus;

5), the use of overhead ground wire makes the insulation against ground problem not constitute problem, thereby has reduced the labour intensity of engineering construction;

6), through the power taking of portable power source car, solved and be difficult to obtain power supply and numerous and diverse problems such as overhead ground wire segmentation, multipoint earthing;

7), the environment of deicing is improved, and reduced the risk that deicing possibly cause;

8), can be when transmission line is transmitted electricity chargedly carry out the ground wire deicing, avoided the trouble that has a power failure;

9), do not influence based on other construction and operation on the ground wire during deicing.

Description of drawings:

Fig. 1 is the structured flowchart of a specific embodiment of the utility model, is denoted as among the figure:

1-portable power source car

The 2-cable

3-junction box

The 4-overhead ground wire.

Embodiment:

Portable overhead ground wire DC ice melting concrete embodiment of system referring to the utility model shown in Figure 1; The HDX5230TDY type emergency dealing emergency power supply car that the portable power source car 1 of this embodiment adopts Fujian China province Haidexin Automobile Co., Ltd., Longyan to produce; It demarcates rated power is 288kW; Non-firm power is 320KW, output current 200A, and power factor 0.8 lags behind; The AGG-20 type silicon rubber insulation high-tension cable that cable 2 adopts Chinese Shanghai Shanghai Da Gaowen cable Co., Ltd to produce, nominal voltage 10kV, sectional area 25mm ²Junction box 3 adopts Hunan China to economize the stainless steel caisson that the auspicious crowd of Changsha machine-building Co., Ltd produces, through-current capability 200A, binding post voltage to earth 10KV; Overhead ground wire 4 selects for use Hunan China to converge the overhead ground wire of led to high-voltage great-current of pure Power Tech Corp. Inc. development, the novel overhead ground wire of this kind can through-flow 200A, anti-more than 200 ℃ high temperature, the above high pressure of anti-10kV, insulating barrier approach.Above-mentioned portable power source car 1, junction box 3, overhead ground wire 4, are composed in series through cable 2 with reference to structured flowchart shown in Figure 1 by above-mentioned technical solution in regular turn.Wherein the output of portable power source car 1 is through cable 2 connection junction boxes' 3 input, and junction box 3 output connects the input of overhead ground wires 4 through cable 2.

The packaged type overhead ground wire DC ice melting system product of the utility model that constitutes is thus tried out trial run and all is proved to be respond well, esy to use, safe and reliable through repeatedly manufacture experimently manyly, reaches designing requirement fully.

Claims (1)

1. portable overhead ground wire DC ice melting system; It is characterized in that; It is composed in series through cable (2) by portable power source car (1), junction box (3), overhead ground wire (4) in regular turn; The output of wherein said portable power source car (1) connects the input of said junction box (3) through cable (2), and said junction box's (3) output connects the input of said overhead ground wire (4) through cable (2).

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