CN200944519Y - Automatic ice-melting device for transmission line - Google Patents
Automatic ice-melting device for transmission line Download PDFInfo
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- CN200944519Y CN200944519Y CN 200620032333 CN200620032333U CN200944519Y CN 200944519 Y CN200944519 Y CN 200944519Y CN 200620032333 CN200620032333 CN 200620032333 CN 200620032333 U CN200620032333 U CN 200620032333U CN 200944519 Y CN200944519 Y CN 200944519Y
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- lead
- switch
- transmission line
- current
- steel strand
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Abstract
The utility model relates to an automatic de-icing apparatus for transmission line capable of avoiding or reducing power cut accident of transmission line due to natural disaster, which is characterized in that a current switch matches with lead and steel wire of the transmission line and is connected in series with each lead. In the transmission line using divided lead, the current in the lead connected with the switch is switch to other lead by cutting off the switch, thereby enlarging the current in other lead and emitting heat. In the transmission line of using single lead, the current in the lead is switch to a specially spanned thin steel wire and the steel wire emit heat by cutting off the switch, thereby melting the ice on the lead by the heat emitted from the steel wires.
Description
Affiliated technical field
The utility model relates in the electric power system, is used to avoid or reduce ultra-high-tension power transmission line causes power outage owing to natural calamity device.
Background technology
Ultra-high-tension power transmission line (mainly referring to 110 kilovolts and above electric pressure) runs into heavy snow weather, snowflake will on lead, constantly build up and build-up ice (be actually ice and snow mixture).When the weight of icing reaches one regularly, then can break lead, even the accident of falling the bar of generation.
At this problem, also there is not feasible solution at present both at home and abroad.I propose to adopt the aluminium armor tape that scribbles nano material in patent application 200620031515.9, this aluminium armor tape is wrapped up on the part of path that freezes easily.Be not easy the characteristic of adsorbed water according to nano material, make and fewly on the circuit freeze or do not freeze.The shortcoming of above-mentioned aluminium armor tape is: when the temperature of circuit itself was less than or equal to zero degree, because snowflake drops on the lead and can not melt at once, the anti-icing effect of this aluminium armor tape was not very good in the case.
Summary of the invention
The purpose of this utility model will provide a kind of transmission line automatic deicing apparatus exactly, and it can effectively avoid or reduce lead owing to excessive freeze is pressed down and the generation of the accident of falling the bar.
The purpose of this utility model is achieved in that current changeover switch is matched with lead, steel strand wire on the transmission line, a cut-off point is set on each root lead, a lead of cut-off point is connected with terminals of current changeover switch, another root lead of cut-off point is connected with another terminals of this switch, like this can by this switch with the current switching in its place lead in other lead, steel strand wire, the electric current in other lead, the steel strand wire is increased and heating.
For two bundle conductors (promptly in the phase circuit two leads being arranged), can a current changeover switch (hereinafter to be referred as switch) be installed respectively on two leads according to above-mentioned method of attachment.When reaching certain thickness, at first allow the switch on first lead disconnect when freezing on the lead, like this since electric current in first lead be zero, the electric current in second lead increases to original two times and heating (notes: total current is constant on the circuit).After ice on second lead is melted, allow switch closure on first lead again, the switch on second lead disconnects, like this since electric current on second lead be zero, the electric current on first lead increases to original two times and generates heat.After ice on first lead is melted, allow switch closure on second lead again, make two electric currents on the lead all return to original size again.So far, the deicing processes of two leads finishes, and circuit enters normal operating condition again.
If 4 bundle conductors, then per two leads are installed a current changeover switch and are got final product, and the like.
For solid conductor (every phase circuit has only a lead), can a switch be installed on lead according to above-mentioned method of attachment.But rely on lead heating itself just unworkable.For this reason, can set up the steel strand wire that diameter is thinner specially near this lead.When reaching certain thickness, allow the switch on the lead disconnect, make electric current by steel strand wire and make its heating when freezing on the lead.The ice-out that the heat that relies on steel strand wire to distribute will abut against on together the lead falls.After ice on the lead is melted, make the switch closure on the lead again, lead promptly returns to normal operating condition.
Can adopt measuring and controlling equipments such as artificial or ice and snow sensor above-mentioned switch to be disconnected or closure.
The utility model is simple in structure.For newly-built transmission line, can when the beginning stringing, just current changeover switch or steel strand wire be installed, can save the devil to pay like this.For existing transmission line, can add-assembly will be carried out after the line outage.Though in installation process, relatively take a lot of work, time-consuming, be pressed down with lead and the economic loss that causes is compared and still is worth.
Description of drawings
The concrete structure of utility model is provided by following examples and accompanying drawing thereof.
Fig. 1 is the wiring schematic diagram that current changeover switch is installed on two bundle conductors.
Fig. 2 is the wiring schematic diagram near the wire erection steel strand wire.
Fig. 3 is with steel strand wire and lead fixed cross sectional representation together.
Fig. 4 is the schematic diagram that the tension force of dependence lead on single conductor makes the current changeover switch action.
Fig. 5 relies on ice and snow sensor and other measuring and controlling equipment to make the schematic diagram of current changeover switch action on single conductor.
In order to be illustrated more clearly in problem, institute's drawings attached is all represented with line chart.
1. generators among the figure, 2. step-up transformer, 3. circuit breaker, 4. moving contact, 5. current changeover switch, 6. fixed contact, 7. bundle conductor, 8. circuit breaker, 9. step-down transformer is 10. used electric line, 11. bundle conductor, 12. current changeover switch, 13. current changeover switch, 14. lead, 15. steel strand wire, 16. porcelain cleats, 17. porcelain cleat, 18. set bolts, 19. tension springs, 20. insulator, 21. electric poles, 22. insulators, 23. arm, 24. backguys, 25. pull bars, the lead 26. be flexible coupling, 27. connecting levers, 28. leads, 29. ice and snow sensor, 30. current transformers, 31. current changeover switch.
Embodiment
In Fig. 1: generator (1) sends after the electricity, at first by step-up transformer (2) voltage being raise, (annotate: the outlet voltage of generator generally has only 10,000 volts, be remote conveying, voltage must be raise, can be elevated to more than 750,000 volts at present), then by circuit breaker (3) (its effect be for normally stop to send electricity and have an accident after automatically circuit is disconnected, also call it sometimes and be switch), switch (5), switch (12), lead (7) and lead (11) send away the place that needs electric power.At line end circuit breaker (8) and step-down transformer (9) are housed, arrive with electric line (10) at last.Lead (7) and lead (11) are two bundle conductors, and switch (5) and switch (12) can be installed in top, end and the strain insulator bar place (not drawing on the circuit) of lead.Moving contact (4) and fixed contact (6) (following all switches are identical therewith) are housed in the switch (5).
When reaching certain thickness, at first allow switch (5) disconnect when freezing on the lead, like this since in the lead (7) electric current be zero, the electric current in the lead (11) increases to original two times.According to the principles of electric and electronic engineering: when resistance one regularly.Heat that lead sends and electric current square and be directly proportional conduction time.Therefore, temperature on the lead (11) raises, and after the ice on the lead (11) is melted, allows switch (5) closure again, and switch (12) disconnects, and electric current is zero in the lead (11) like this, and the electric current in the lead (7) increases to original two times again and generates heat.After ice on the lead (7) is melted, allow switch (12) closure again, so far, the deicing processes of two leads finishes.
For implementing above scheme, need between lead (7) and lead (11), a conductor spacer (not drawing among the figure) be installed every a segment distance, can make mutually insulated between two leads like this.Present various types of conductor spacer is used on bundle conductor, its structure and roughly the same shown in Figure 3.But the vertical range between the bundle conductor is much wideer than shown in Figure 3, generally all about 20 centimeters.The conductor spacer that the utility model adopted not only will keep mutually insulated between two leads, but also wants high temperature resistant.
By among Fig. 1 as can be seen: the performance of switch (5) and switch (12) and circuit breaker (3) and circuit breaker (8) are distinct.Circuit breaker (3) and circuit breaker (8) are when cut-offfing state, and the voltage between the contact is that the rated voltage of transmission line is as 110,000 volts, 220,000 volts, 50 Wan Fu etc.And switch (5) or switch (12) be when cut-offfing state, and the voltage between the contact is lead (7) or lead (11) pressure drop that electric current produces on lead when isolated operation.Consider that lead is in febrile state, the voltage between the contact can not surpass 20% of rated voltage at most.In addition, the speed ratio circuit breaker (3) and the circuit breaker (8) of the requirement when disconnecting with closure of switch (5) and switch (12) are much lower.Therefore switch (5) and switch (12) get up more much easier than circuit breaker (3) and circuit breaker (8) in making.
Generally speaking, the electric current on two leads merged to a lead after, this lead all can generate heat.Otherwise this circuit belongs to the abnormal running state.
In Fig. 2: be only to adopt a lead (14) to transmit electric power to the distant place with difference among Fig. 1.Switch (13) (the same Fig. 1 in installation site) is housed on lead (14).For the ice-out on the lead (14) is fallen, set up the steel strand wire (15) that diameter is thinner specially near lead (14).This twisted wire impedance is bigger, when circuit normally moves in this twisted wire electric current almost nil.
When reaching certain thickness, allow switch (13) disconnect, make electric current all by steel strand wire (15) when freezing on the lead (14).According to the principles of electric and electronic engineering: when electric current one regularly, the heat that lead sends and the size of resistance and be directly proportional conduction time.Therefore, by selecting the diameter of steel strand wire (15), the ice-out that can make its heating and rely on its heat that distributes will abut against on together the lead (14) falls.After ice on the lead (14) is melted, allow switch (13) closure again, lead (14) returns to normal operating condition again.Lead (14) is seen Fig. 3 with the relative position of steel strand wire (15).
In Fig. 3: corresponding with Fig. 2, lead (14) is suspended on the electric pole by insulator (not drawing among the figure) and (does not draw among the figure), adopt porcelain cleat (16), porcelain cleat (17) and set bolt (18) with steel strand wire (15) be fixed on lead (14) below, the vertical range between the two is about 3 centimeters.Go up installation one cover porcelain cleat [it is a cover that porcelain cleat (14), porcelain cleat (15) and set bolt (16) are combined] every about 20 meters at lead (14) and steel strand wire (15).So steel strand wire (15) are that parallel suspend is below lead (14) and mutually insulated.The two distance is very near, and when steel strand wire (15) adstante febre, its heat that distributes can fall the ice-out above the lead (14).
Steel strand wire (15) can also be installed on the top or same horizontal plane of lead (14), but because steel strand wire (15) diameter is less, load-bearing is limited, considers reasons such as staff's live line working on the line, and therefore steel strand wire (15) being installed in the following of lead (14) should be as first-selection.
In Fig. 4: electric pole (21) is a strain insulator bar, and its both sides are equipped with insulator (20) and insulator (22).Corresponding with Fig. 2, lead (14) is suspended on the insulator (20) by tension spring (19).In the lead (14) and the junction of tension spring (19) connecting lever (27) is housed, connecting lever (27) acts on switch (13) by pull bar (25), switch (13) is disconnected or closure.Switch (13) is suspended on the junction of insulator (20) and tension spring (19) by arm (23).Two backguys (24) are used to strengthen the stability of electric pole (21).Lead (14) strides across electric pole (21) by the lead that is flexible coupling (26).Switch (13) series connection is in the lead that is flexible coupling (26).For for simplicity, steel strand wire are not drawn among the figure.
As can be seen from Figure: after lead (14) go up to freeze, be subjected to the influence of gravity, tension spring (19) can be elongated (being in the state that freezes among the figure), and drive connecting lever (27) along the direction of arrow to left movement, by pull bar (25), switch (13) is disconnected.Make all flow through steel strand wire (not drawing among the figure) and make its heating of electric current in the lead (14).Its heat that distributes with the ice-out on the lead (14) after, tension spring (19) can shorten again gradually, and drives connecting lever (27) and move right along the direction of arrow, by pull bar (25), make switch (13) closure again, steel strand wire promptly stop heating, and lead (14) returns to normal operating condition again.
Above-mentioned tension spring only is applicable to every transmission line that has only a lead mutually.
The adjusting of switch motion value (be circuit freeze just allow when thickness reaches certain value switch action) and the internal structure of above-mentioned switch belong to general high voltage electrical equipment general knowledge, are not described in detail in this.
In Fig. 5: be to be equipped with on the lead (28) ice and snow sensor (29) summation current transformer (30) with Fig. 4 difference, electromagnetic operating mechanism (do not draw in the drawings, operating mechanism all is housed on the general high voltage switch) is installed on switch (31) simultaneously.Current transformer (30) provides power supply for electromagnetic operating mechanism.When the thickness that freezes on the lead reaches the set point of ice and snow sensor (29), this transducer promptly sends icing signal to electromagnetic operating mechanism, electromagnetic operating mechanism is that driving switch (31) disconnects, and electric current in the lead (28) is all flowed through abut against steel strand wire (not drawing among the figure) together and make its heating.Its heat that distributes with the ice-out on the lead (28) after, the sensor sends the signal that freezes to electromagnetic operating mechanism again, electromagnetic operating mechanism is driving switch (31) closure again, steel strand wire promptly stop heating, lead (28) returns to normal operating condition again.
Above-mentioned ice and snow sensor and other measuring and controlling equipment also are applicable to the transmission line that adopts bundle conductor.
Switch, current transformer and the ice and snow sensor that electromagnetic operating mechanism is housed is ripe already at present product, and its operational detail is not described in detail in this.
Claims (1)
- The transmission line automatic deicing apparatus, it is characterized in that current changeover switch is matched with lead, steel strand wire on the transmission line, a cut-off point is set on each root lead, a lead of cut-off point is connected with terminals of current changeover switch, another root lead of cut-off point is connected with another terminals of this switch, like this can by this switch with the current switching in its place lead in other lead, steel strand wire, the electric current in other lead, the steel strand wire is increased and heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620032333 CN200944519Y (en) | 2006-08-29 | 2006-08-29 | Automatic ice-melting device for transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620032333 CN200944519Y (en) | 2006-08-29 | 2006-08-29 | Automatic ice-melting device for transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200944519Y true CN200944519Y (en) | 2007-09-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620032333 Expired - Fee Related CN200944519Y (en) | 2006-08-29 | 2006-08-29 | Automatic ice-melting device for transmission line |
Country Status (1)
| Country | Link |
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| CN (1) | CN200944519Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009049544A1 (en) * | 2007-10-12 | 2009-04-23 | Lianggui Gong | Ice-melting device for bundle conductor transmission line and thereof method |
| CN101272041B (en) * | 2008-04-14 | 2010-10-27 | 朱发国 | Wire-protecting and de-icing method of unit type high tension power line |
| CN101242086B (en) * | 2008-02-06 | 2010-12-01 | 傅雅芬 | Ice and snow fusion method for air power transmission line |
| CN101262124B (en) * | 2008-03-28 | 2011-04-20 | 华中科技大学 | An ice removing method and device for high-voltage power transmission line |
| CN101667722B (en) * | 2008-09-05 | 2011-07-20 | 唐翊程 | Method for melting ice and snow on power transmission and distribution lines by low voltage and high current |
| CN101409438B (en) * | 2008-07-25 | 2011-10-05 | 中国电力工程顾问集团西北电力设计院 | Ice-melting method suitable for transmission line with multiple fission conductor |
| CN101710683B (en) * | 2009-12-25 | 2012-10-03 | 重庆大学 | Intelligent circulation anti-icing method for transmitting current by split lead |
| CN102709858A (en) * | 2011-12-25 | 2012-10-03 | *** | Anti-icing power transmission and distribution line |
-
2006
- 2006-08-29 CN CN 200620032333 patent/CN200944519Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009049544A1 (en) * | 2007-10-12 | 2009-04-23 | Lianggui Gong | Ice-melting device for bundle conductor transmission line and thereof method |
| CN101689757B (en) * | 2007-10-12 | 2011-06-29 | 龚良贵 | Ice-melting device for bundle conductor transmission line and thereof method |
| CN101242086B (en) * | 2008-02-06 | 2010-12-01 | 傅雅芬 | Ice and snow fusion method for air power transmission line |
| CN101262124B (en) * | 2008-03-28 | 2011-04-20 | 华中科技大学 | An ice removing method and device for high-voltage power transmission line |
| CN101272041B (en) * | 2008-04-14 | 2010-10-27 | 朱发国 | Wire-protecting and de-icing method of unit type high tension power line |
| CN101409438B (en) * | 2008-07-25 | 2011-10-05 | 中国电力工程顾问集团西北电力设计院 | Ice-melting method suitable for transmission line with multiple fission conductor |
| CN101667722B (en) * | 2008-09-05 | 2011-07-20 | 唐翊程 | Method for melting ice and snow on power transmission and distribution lines by low voltage and high current |
| CN101710683B (en) * | 2009-12-25 | 2012-10-03 | 重庆大学 | Intelligent circulation anti-icing method for transmitting current by split lead |
| CN102709858A (en) * | 2011-12-25 | 2012-10-03 | *** | Anti-icing power transmission and distribution line |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070905 |