CN204696684U - The ultra-high-tension power transmission line of current balance is kept after a kind of power taking - Google Patents

Abstract

The ultra-high-tension power transmission line of current balance is kept after the utility model discloses a kind of power taking, this transmission line splits wire at the added A of the being provided with phase of shaft tower, B phase and C phase three components, often organize between each sub-line of bundle conductor and support separation successively through multiple conductor spacer, all each sub-line of one or more bundle conductor is all equipped with identical high voltage induction electricity getting device.Though this ultra-high-tension power transmission line is through high-voltage power transmission device power taking, but still make each sub-line in bundle conductor have identical electric current, make transmission line be in health status all the time and run, remove all kinds of hazards.

Description

The ultra-high-tension power transmission line of current balance is kept after a kind of power taking

Technical field

The utility model relates to a kind of ultra-high-tension power transmission line, utilizes in particular to one high pressurethe ultra-high-tension power transmission line that electric current after induction electricity getting device is suspended on and bundle conductor carries out power taking in each sub-line of this bundle conductor is still kept in balance.

Background technology

Ultra-high-tension power transmission line is the circuit being undertaken transmitting electricity by setting up high pressure A phase, B phase and C phase three-phase conducting wire between shaft tower.The wire of A, B, C three-phase all adopts bundle conductor, and namely in A, B, C three-phase, any phase all adopts the identical sub-line of many electric currents, voltage and phase place to be one group of transmission line forming this phase, the bundle conductor of the sub-line of this group namely this phase.Bundle conductor can make the distribution of wire surrounding magnetic field change, thus increases wire radius equivalently, reduces wire reactance, while minimizing reactance, decreases corona loss and improves the power limit of system.The number that bundle conductor splits into sub-line is relevant with transmission voltage, and general 220kV is 2 divisions, and 500kV is 4 divisions, and Northwest Grid 750kV is 6 divisions, and 1000kV is 8 divisions.The each sub-line of bundle conductor is parallel to each other and runs through respectively on the summit of regular polygon, carries out separation successively support between sub-line with conductor spacer.

One of intelligent grid development an urgent demand is that the environment around stability, continuity and the transmission line to ultra-high-tension power transmission line transmission of electricity carries out real time on-line monitoring, this needs to use various transducer or other devices, as on-line measuring device, line facility anti-theft device, inspection robot, hot line robot, the filthy on-Line Monitor Device of high-tension line etc.The power supply of these devices desirably adopts high voltage induction electricity getting device, compare sun-generated electric power, high voltage induction electricity getting device is suspended on high voltage transmission line, by electromagnetic induction generation current, not by the restriction of the factor such as energy conversion rate, climatic environment, compare storage battery again substantially not by the impact in useful life, there is advantages such as in addition adapting to various bad weather, round-the-clock reliable and stable power supply, long-term non-maintaining operation.High voltage induction electricity getting device utilizes silicon steel sheet to make two semicirculars to close up and be enclosed within a certain root line of bundle conductor, silicon steel sheet is wound with coil and can produces induced current, in this, as power supply.All that high voltage induction electricity getting device is suspended on a certain root line of bundle conductor in current high voltage supply circuit, between adjacent two conductor spacers, and a high voltage induction electricity getting device will be hung every some conductor spacers, power supply could be provided respectively for each monitoring device of whole piece circuit like this.But, there is a major defect in this high voltage supply circuit, when namely only having installation high-voltage induction electricity getting device on a root line in bundle conductor, after this high voltage induction electricity getting device is installed on sub-line, owing to there is electromagnetic induction between itself and sub-line, this electromagnetic induction changes the impedance of this sub-line, the identity property originally flowing through electric current between each sub-line will be broken, making originally should to flow through the sub-line current being hung with high-voltage power transmission device flows in other sub-lines through conductor spacer, destroy the balanced health of bundle conductor transmission of electricity, whole piece ultra-high-tension power transmission line is in unhealthy running status, this unhealthy condition makes this ultra-high-tension power transmission line there is potential safety hazard, reduce whole line energizing flow ability or increase the ampacity of sub-conductor of other wires, thus increase the fatigue strength of its current-carrying, circuit can be made time serious overheated and even occur melting the extreme case ruining open circuit in lifetime.

Utility model content

In view of this, technical problem to be solved in the utility model keeps the ultra-high-tension power transmission line of current balance after being to provide a kind of power taking, this ultra-high-tension power transmission line overcomes above-mentioned current-unbalance drawback, though through high-voltage power transmission device power taking, but still make each sub-line in bundle conductor have identical electric current, make transmission line be in health status all the time to run, remove all kinds of hazards.

To achieve these goals, the utility model takes following technical scheme:

The ultra-high-tension power transmission line of current balance is kept after a kind of power taking, comprise shaft tower, wire is split at the added A of the being provided with phase of shaft tower, B phase and C phase three components, often organize between each sub-line of bundle conductor and support separation successively through multiple conductor spacer, it is characterized in that, in at least one group of bundle conductor, if a certain strip line between two conductor spacers that certain is adjacent is hung with high voltage induction electricity getting device, then the every other sub-line between these two conductor spacers is also hung with identical high voltage induction electricity getting device.

Preferably, in described each group of bundle conductor, if a certain strip line between two conductor spacers that certain is adjacent is hung with high voltage induction electricity getting device, then the every other sub-line between these two conductor spacers is also hung with identical high voltage induction electricity getting device.

The transmission of electricity lack of uniformity that the utility model has caused after first having found that ultra-high-tension power transmission line installs high-voltage power transmission device additional, and propose solution, recover the harmony of transmitting electricity, ultra-high-tension power transmission line state of keeping fit has been run, eliminates the potential safety hazard had before this.Specifically, every root line all hangs identical high-voltage power transmission device, eliminate the unbalanced interference introduced separately high-voltage power transmission device on a root line electromagnetic field is caused, avoid the phenomenon that electric current that this interference brings is scurried out to other wires from this wire, make each sub-line current keep identical.

Accompanying drawing explanation

Fig. 1 is the utility model ultra-high-tension power transmission line schematic diagram;

Fig. 2 is close-up schematic view.

Embodiment

Below in conjunction with accompanying drawing, the specific embodiment of the present invention is explained:

Ultra-high-tension power transmission line comprises numerous shaft tower, and the construction of line is on shaft tower, and circuit two ends connect transformer station, and circuit can also be cross-linked to form electrical network.Fig. 1 shows the line condition between two adjacent shaft towers, and the situation between other adjacent shaft towers is similar, and this patent is that representative illustrates technical conceive and scheme with Fig. 1.As shown in Figure 1, between shaft tower n and shaft tower n+1, all there are upper, middle and lower three bundle conductors in every side, respectively corresponding A, B, C three phase line, are now described with side situation.Bundle conductor 1 corresponding A phase, the corresponding B phase of bundle conductor 2, the corresponding C phase of bundle conductor 3.On bundle conductor 1, each certain distance is just equipped with conductor spacer between each sub-line, and the situation of adjacent two conductor spacers 7 and conductor spacer 4, conductor spacer 8 and conductor spacer 5, conductor spacer 9 and conductor spacer 6 is only shown in figure, and other conductor spacers do not draw.Be hung with high voltage induction electricity getting device group 10 between conductor spacer 7 and conductor spacer 4, between conductor spacer 8 and conductor spacer 5 and between conductor spacer 9 and conductor spacer 6, also can be hung with high voltage induction electricity getting device.

Fig. 2 shows bundle conductor 1 for quadrifid situation, comprises sub-line 11, sub-line 12, sub-line 13 and sub-line 14, if be the situation such as six divisions, eight divisions, situation and quadripartion similar, by that analogy.Sub-line 11 is hung with high voltage induction electricity getting device 101, sub-line 12 be hung with high voltage induction electricity getting device 102, sub-line 13 be hung with on high voltage induction electricity getting device 103, sub-line 14 and is hung with high voltage induction electricity getting device 104.High voltage induction electricity getting device 101,102,103,104 identical, and form high voltage induction electricity getting device group 10.After sub-line 11, sub-line 12, sub-line 13 and sub-line 14 all hang identical high voltage induction electricity getting device, because symmetry, each high voltage induction electricity getting device is identical on corresponding each sub-line impact, each sub-line impedence changes also identical, therefore in each sub-line, circuit remains identical, which solves under the prerequisite ensureing normal power taking from sub-line, maintain the healthy normal operation of transmission line.If ABC three phase bundle conductor all hangs high voltage induction electricity getting device, then the situation on every bar bundle conductor is identical with above-mentioned situation.

Claims (2)

1. after a power taking, keep the ultra-high-tension power transmission line of current balance, comprise shaft tower, wire is split at the added A of the being provided with phase of shaft tower, B phase and C phase three components, often organize between each sub-line of bundle conductor and support separation successively through multiple conductor spacer, it is characterized in that, in at least one group of bundle conductor, if a certain strip line between two conductor spacers that certain is adjacent is hung with high voltage induction electricity getting device, then the every other sub-line between these two conductor spacers is also hung with identical high voltage induction electricity getting device.

2. after power taking as claimed in claim 1, keep the ultra-high-tension power transmission line of current balance, it is characterized in that, in described each group of bundle conductor, if be hung with high voltage induction electricity getting device on a certain strip line between two conductor spacers that certain is adjacent, then the every other sub-line between these two conductor spacers is also hung with identical high voltage induction electricity getting device.