CN202111446U - Device for quickly melting ice and snow on transmission line - Google Patents
Device for quickly melting ice and snow on transmission line Download PDFInfo
- Publication number
- CN202111446U CN202111446U CN2011202456504U CN201120245650U CN202111446U CN 202111446 U CN202111446 U CN 202111446U CN 2011202456504 U CN2011202456504 U CN 2011202456504U CN 201120245650 U CN201120245650 U CN 201120245650U CN 202111446 U CN202111446 U CN 202111446U
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- Prior art keywords
- transmission line
- transformer
- ice
- snow
- power transmission
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Abstract
The utility model relates to a device for quickly melting ice and snow on a power transmission line. An ice and snow melting transformer and a selector switch are accessed to the front end of a power transmission line, and the rear end of the power transmission line is provided with a three-phase connecting and grounding circuit in front of an original transformer after being positioned behind an initial transformer and a main switch of an original power transmission line; and the power transmission line forms a three-phase starlike circuit when the main switch is switched off and the selector switch and the grounding circuit are switched on. Therefore, the happening of icing and overloading phenomena of an electric wire and a cable under the terrible meteorological conditions such as the blizzard wind, the frozen rain and the like can be avoided, the normal operation of a power system under the terrible meteorological condition can be guaranteed, and powerful power guarantee can be provided for the normal operation of the national disaster-preventing and disaster-reducing work and the economic society.
Description
Technical field
The utility model relates to the line protection field, especially the harm that ice and snow caused on the overhead transmission line is protected.
Background technology
Annual winter, the transmission line of various places all can receive the infringement of ice and snow, and transmission line can be tied thick sleet, and lead is increased the weight of; Cause line broken circuit, even cause accidents such as the power supply iron tower collapses, have a strong impact on transmission performance; Cause large-area power failure, influence industrial and agricultural production and residential electricity consumption.
The southern snowstorm that take place in January, 2008 causes the power supply iron tower to collapse power supply line breaking; Relate to more than 90 counties and cities and have a power failure, cause train to be stopped transport, TV is broken, communicating interrupt, social life falls into general disorder; Cause more than 100 hundred million yuan of direct economic losses, indirect loss is unable to estimate especially.And the arch-criminal who causes this power failure disaster ice covering on transmission lines overload that to be exactly ice rain, snow melt freeze and cause.The deicing of arousing the masses of for this reason having to needs send in the free-hand climbing of workman tower to reach the standard grade, and knocks trash ice with wooden stick, because transmission line is all worn the mountain in the open air, crossed the river, removal ice and snow is quite difficult, has potential safety hazard, and efficient is low again.
Existing a kind of deicing robot in the prior art has been avoided needing manually-operated difficult process, has improved the efficient of deicing; But need be suspended on the power transmission line in high-altitude when using; The operation long operational time that just seems on the lead of hundreds of kilometer simultaneously, snow removing efficient is low, and cost is high.
Chinese patent 200810214379.0 discloses a kind of " with the method for low voltage and high current melting ice and snow on power transmission and distribution lines "; Comprise that employing need melt the electric line of ice and snow and the transformer station at transmission line two ends; Two ends at transmission line; Be on the turnover line of transformer station, the one of which end connects 12 volts to 80 volts low-voltage, and the other end connects the short circuit operating desk; When need fusing ice and snow; End connecting low-voltage carries out the low tension output function; Carry out the short circuit operation at an end that connects the short circuit operating desk; Make and realize low voltage and high current on the electric line that needs fusing ice and snow and produce heat, thereby make the ice and snow acquisition heat that needs fusing on the electric line and melt.Though this method is feasible in theory; But owing to need carry out the short circuit operation of circuit; Can only be duration of short circuit with the second during operation, with 5 seconds to 10 seconds of being interrupted between the lead of need short circuit operation at different levels back and forth collision realize the short circuit operation, operating process is complicated; If have accidentally, be easy to cause circuit to be burnt; The fragile transmission pressure of the operation of short circuit influences useful life of circuit, and fail safe is low; The action need of the method changes the mode of connection, and operation is complicated, fail safe is relatively poor, careless slightly, causes the short circuit blast easily, damages whole transmission system, and security incident takes place, and therefore is difficult in practice realize.
The utility model content
The applicant is to shortcomings such as dangerous, unreliable, the fragile transmission line of the short-and-medium dataway operation of above-mentioned existing production, troublesome poerations; The device that provides a kind of easy to operate quick ice-melt of transmission line to avenge; Make electric wire under bad weather conditions such as snowstorm, ice rain, eliminate the generation of icing overload phenomenon; Guarantee that electric power system normally moves under bad weather condition, for the prevent and reduce natural disasters normal operation of work and economic society of country provides strong electric power safeguard.
The technical scheme that the utility model adopted is following:
The device of the quick ice-melt snow of a kind of transmission line; Ice-melt snow transformer and diverter switch insert the front end of transmission line; Be positioned at after the beginning transformer and main switch of former transmission line, the rear end of transmission pressure was provided with three and is connected and ground path before former last transformer; When breaking off main switch, when connecting diverter switch and ground path, transmission line constitutes the three-phase star circuit.
The beneficial effect of the utility model is following:
Voltage was all very high when (1) transmission line was normally transmitted electricity work, and line current is very little, and the lead caloric value is very little; The utility model utilizes the resistance of transmission pressure itself to generate heat through increasing the current-carrying of lead, thereby reaches the purpose that ice and snow melts fast.The utility model device is simple, and directly on existing line, transforms easily.
(2) at the disconnected main switch of an end-grain cutting of transformer station; The beginning transformer quits work, and connects change-over switch, the work of ice-melt snow transformer; The other end that is positioned at transformer station simultaneously is communicated with ground path; Formed a three-phase star ice-melt and avenge the heating circuit this moment on the transmission pressure, the work back extremely can solve the thawing problem of all lead ice and snow between each transformer station usually within an hour according to the actual conditions of transmission pressure icing at 20 minutes; Simple to operate; Safe ready, thawing speed is fast, and efficient is high; After reaching the thawing effect, cut off ice-melt snow heating circuit, open and close corresponding switch transmission line of electricity is restored electricity.
(3) distance between the utility model transformer station is unrestricted, and the distance between two transformer stations can not wait between 5～100 kilometers.
Description of drawings
Fig. 1 is that the circuit of the utility model connects sketch map.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the utility model is described.
As shown in Figure 1; The device of the quick ice-melt snow of the described transmission line of the utility model; The front end of ice-melt snow transformer 7 and diverter switch 6 access transmission lines; Be positioned at after the beginning transformer 1 and main switch 2 of former transmission line, the rear end of transmission pressure was provided with three and is connected and ground path 5 before former last transformer 4; When breaking off main switch 2, when connecting diverter switch 6 with ground path 5, transmission line constitutes the three-phase star circuit, utilizes the resistance of transmission pressure itself to make the lead heating can realize quick deicing work easily.
Utilize the described device of the utility model to carry out the operation of the quick ice-melt snow of transmission line, can accomplish through following steps:
The first step: be provided with and the calculating relevant parameter, its method for building up is following:
(1), the thickness according to transmission pressure, length and the insulating sleeve that wrapped up, confirm every meter heating power Pm of lead, every meter heating power of general lead is selected between 20 w ~ 120 w;
(2), calculate the heating gross power of solid conductor: P=Pm * L (w), wherein P is the heating gross power (kw) of solid conductor, Pm is every meter heating power (w/m) of lead, L is the total length (km) of solid conductor;
(3), according to the computing formula of three-phase star circuit, at this moment, the line voltage of transmission line: U
Line=(v), thus obtain transformer output phase voltage: U
Phase=* U
Line(v), wherein R is the all-in resistance (Ω) of lead;
(4), the line current of transmission pressure: I=U
Line/ R (A); Current-carrying: i=I/S (A), wherein S is the sectional area (mm of heating-wire
2);
(5), heating circuit gross power: P
Always=3 * P (kw);
Can confirm the capacity of ice-melt snow transformer according to the gross power of the heating circuit that draws, select suitable transformer;
Second step: break off main switch 2 and beginning transformer 1; Insert selected ice-melt snow transformer 7 on the beginning transformer 1 and main switch 2 of transformer station's one end with diverter switch 6 parallel connections; Simultaneously at transformer station's other end; Between main switch 2 and last transformer 4, insert ground path 5, soon three-phase conducting wire is connected and ground connection;
The 3rd step: connect ice-melt snow transformer 7, be communicated with ground path 5 simultaneously, form three-phase star ice-melt snow circuit; Utilize the resistance of transmission pressure itself to produce heating; Thereby increased the current-carrying on the transmission pressure, made the lead heating, to reach the ice and snow purpose of fusing fast.
In the practical operation work, when ice and snow covers power transmission line, and have when congealing ice and snow repeatedly, only need close the beginning transformer, connect ice-melt snow transformer, other end ground path after energising a period of time, then just can carry out deicing work.
Wherein be provided with in the first step and following two embodiment of method reference that calculate relevant parameter:
Embodiment one:
Measure between two transformer stations distance and be 50km, the transmission pressure cross section is 50mm
2, the lead heating power is 60w/m.
Computational process is following:
(1) solid conductor all-in resistance: R=r * L=0.387 Ω/km * 50km=19.35 Ω (50mm
2The every km resistance value of transmission pressure r ≈ 0.387 Ω);
(2) solid conductor gross power: P=Pm * L=60w/m * 50km=3000kw; Wherein P is the heating gross power of solid conductor, and Pm is every meter heating power of lead, and L is the total length of solid conductor;
(3) the line voltage U of heating-wire
LineThe 7619V of===, the phase voltage U of three-phase heating-wire
Phase=* U
Line=1.732 * 7619 ≈ 13200V;
(4) electric current of heating-wire: I=U
Line/ R=7619/19.35=393.7A, the current-carrying of every square unit of heating-wire: i=I/S=393.7/50=7.87A, wherein S is the sectional area mm of lead
2
(5) heating-wire three-phase gross power: P
Always=3 * P=3 * 3000kw=9000kw.
Therefore, the selection capacity is avenged transformer more than or equal to the transformer of 9000kw as ice-melt.
Embodiment two:
Distance between two transformer stations is 50km, and the input lead cross section is 300 mm
2, the lead heating power is 100w/m.
Computational process is following:
(1) solid conductor all-in resistance R=r * L=0.0601 * 50=3.005 Ω (300 mm
2Every km resistance value r ≈ 0.0601 Ω of copper core electric wire);
(2) solid conductor gross power P=Pm * L=100w/ m * 50km=5000kw; Wherein P is the heating gross power of solid conductor, and Pm is every meter heating power of lead, and L is the total length of solid conductor;
(3) the line voltage U of heating-wire
LineThe 3876V of===, the phase voltage U of three-phase heating-wire
Phase=* U
Line=6714V;
(4) electric current of heating-wire: I=U
Line/ R=3876/3.005=1289.85A, the current-carrying of every square unit of heating-wire: i=I/S=1289.85/300 ≈ 4.3A, wherein S is the sectional area mm of lead
2
(5) heating-wire three-phase gross power: P
Always=3 * P=15000kw.
Therefore, the selection capacity is avenged transformer more than or equal to the transformer of 15000kw as ice-melt.
General lead current-carrying is controlled between 3A～18A, and under this current-carrying, lead can generate heat and can not damage.Lead unit's heating power is selected according to actual conditions and needs, wants seeking time short when snow melt, and when speed was fast, the lead heating power can be selected greatly, otherwise then can select littler; According to the size in line footpath, the line footpath is big, and the lead heating power is optional big, and the line footpath is thin, and then power is littler; Bare wire is optional big, and the insulation line selection is littler.Because transmission pressure is bare wire mostly, the lead heating power can be selected bigger, generally can between 20w/m～120 w/m, choose.
Because distance is different in size between two transformer stations, the line footpath of power transmission line also has and slightly has carefully, for ice-melt snow safety, achieve the goal reliably, so present technique is in electric substation an ice-melt snow transformer to be set at first stop.The input of ice-melt snow transformer can be the also output of main transformer of input of main transformer, looks each electric substation and decide, and the output voltage of ice-melt snow transformer determines according to the cross-sectional sizes of distance, lead between two transformer stations and the heating power of lead.
More than describing is the explanation to the utility model, is not the qualification to utility model, and the utility model institute restricted portion is referring to claim, and under the situation of the utility model spirit, the utility model can be done any type of modification.
Claims (1)
1. the device of the quick ice-melt snow of a transmission line; It is characterized in that: ice-melt snow transformer and diverter switch insert the front end of transmission line; Be positioned at after the beginning transformer and main switch of former transmission line, the rear end of transmission pressure was provided with three and is connected and ground path before former last transformer; When breaking off main switch, when connecting diverter switch and ground path, transmission line constitutes the three-phase star circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202456504U CN202111446U (en) | 2011-07-13 | 2011-07-13 | Device for quickly melting ice and snow on transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202456504U CN202111446U (en) | 2011-07-13 | 2011-07-13 | Device for quickly melting ice and snow on transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202111446U true CN202111446U (en) | 2012-01-11 |
Family
ID=45436894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202456504U Expired - Fee Related CN202111446U (en) | 2011-07-13 | 2011-07-13 | Device for quickly melting ice and snow on transmission line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202111446U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102231506A (en) * | 2011-07-13 | 2011-11-02 | 潘明清 | Device and method for rapidly melting ice and snow of transmission line |
-
2011
- 2011-07-13 CN CN2011202456504U patent/CN202111446U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102231506A (en) * | 2011-07-13 | 2011-11-02 | 潘明清 | Device and method for rapidly melting ice and snow of transmission line |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120111 Termination date: 20140713 |
|
| EXPY | Termination of patent right or utility model |