CN202057763U - Experimental device of simulating high voltage transmission line flashover discharge triggered by forest fire - Google Patents
Experimental device of simulating high voltage transmission line flashover discharge triggered by forest fire Download PDFInfo
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- CN202057763U CN202057763U CN2011200960987U CN201120096098U CN202057763U CN 202057763 U CN202057763 U CN 202057763U CN 2011200960987 U CN2011200960987 U CN 2011200960987U CN 201120096098 U CN201120096098 U CN 201120096098U CN 202057763 U CN202057763 U CN 202057763U
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Abstract
The utility model discloses an experimental device of simulating high voltage transmission line flashover discharge triggered by a forest fire, which comprises a power frequency voltage generator, a connecting lead and a simulation lead used for bearing the power frequency voltage, wherein the power frequency voltage generator, the connecting lead and the simulation lead used for bearing the power frequency voltage are successively connected, the connecting lead is connected with one end of the simulation lead, the connecting lead is also connected with a power frequency voltage divider, a height adjustable suspension mechanism used for hanging the simulation lead is connected with tow ends of the simulation lead, an insulator is arranged between the hanging mechanism and the simulation lead, a refractory material layer is arranged above the ground right below the simulation lead, a metal flat plate is arranged on the refractory material layer, one end of the metal flat plate is connected with an earth terminal, the surface of the metal flat plate is connected with a metal electrode, the metal electrode is vertically arranged and is shaped as a needle-like conducting rod, a combustion bench is surrounding the metal electrode which serves as the central shaft on the surface of the metal flat plate, and the top of the metal electrode exceeds the surface of the combustion bench.
Description
Technical field
The utility model relates to the safe operation and the forest fire secondary disaster field of ultra-high-tension power transmission line, is specifically related to the experimental provision that the simulating forest fire causes the discharge of ultra-high-tension power transmission line flashover.
Background technology
China's part ultra-high-tension power transmission line is through the mountain area.In recent years, a lot of forest fires taking place caused ultra-high-tension power transmission line tripping operation accident, had a strong impact on the safe and stable operation of electrical network.Generally speaking, air possesses the good insulation performance performance, can serve as the insulating medium between high-tension bus-bar and the ground object.In the ultra-high-tension power transmission line design specifications, made regulation for distance between lead and the ground and the distance between the lead.Yet in case forest fire takes place near the transmission line of electricity, vegetation flame and flue gas can cause the air breakdown field intensity to descend, and striking distance is increased, thereby may cause the clearance breakdown and cause the discharge of ultra-high-tension power transmission line flashover.But, also lack at present the experiment measuring of ultra-high-tension power transmission line flashover discharge under the condition of the scene of a fire, can't the quantitative test fire hazard environment under the flashover flash-over characteristic of ultra-high-tension power transmission line.
The utility model content
The purpose of this utility model is to overcome above-mentioned technical difficulty, develops a kind of mountain fire of can simulating and causes the experimental provision that the ultra-high-tension power transmission line flashover discharges.
For realizing above purpose, the utility model has been taked following technical scheme: a kind of simulating forest fire causes the experimental provision of ultra-high-tension power transmission line flashover discharge, comprise power-frequency voltage generator, the connection lead that connects successively, the analog conducting wire that is used to carry power-frequency voltage, connecting lead is connected on the end of analog conducting wire, the power-frequency voltage generator is used to produce the industrial frequency AC high pressure, outputs on the analog conducting wire; Also be connected with the power-frequency voltage voltage divider on the connection lead, it is used to measure the size of power frequency high voltage; Be used to the adjustment height hitch that is connected the both sides of analog conducting wire and hangs analog conducting wire, be provided with insulator between hitch and the analog conducting wire, it is used for insulating between hitch and the analog conducting wire; On the ground under the analog conducting wire, be provided with refractory masses, refractory masses is provided with metal plate, one end of metal plate is connected to earth terminal, the metal plate surface is connected with metal electrode, metal electrode vertically is provided with, and be needle-like conductive bar structure, be to be provided with combustion platform around metal electrode on axis, the metal plate surface with the metal electrode, combustion platform is used for placing the simulation burning things which may cause a fire disaster to produce the scene of a fire; The top of described metal electrode exceeds the combustion platform surface; Refractory masses is used to support combustion platform and metal electrode, and prevents the destruction of fiery radiation to ground.
The utility model compared with prior art, have following advantage: the utility model can be realized the experiment measuring of scene of a fire mesohigh transmission line of electricity flashover discharge, and effectively analyze contrast, and can provide effective reference for wiring in the ultra-high-tension power transmission line work progress of reality, reduce potential safety hazard; Vertically the needle-like metal electrode that is provided with can guarantee that the discharge path end points fixes, and has eliminated the randomness of discharge path.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
Below in conjunction with the drawings and specific embodiments content of the present utility model is described in further details.
Embodiment:
See also shown in Figure 1, a kind of simulating forest fire causes the experimental provision of ultra-high-tension power transmission line flashover discharge, comprise the power-frequency voltage generator 1, connection lead 11, the analog conducting wire 5 that connect successively, connect lead 11 and be connected on the end of analog conducting wire 5, on connection lead 11, also be connected with power-frequency voltage voltage divider 2; Be used to the adjustment height hitch 3 that is connected the both sides of analog conducting wire 5 and hangs analog conducting wire 5, the connecting line between hitch 3 and the analog conducting wire 5 is provided with insulator 4; On the ground under the analog conducting wire 5, be provided with refractory masses 9, refractory masses 9 is provided with metal plate 8, one end of metal plate 8 is connected to earth terminal 10, metal plate 8 surfaces are connected with metal electrode 7, metal electrode 7 vertically is provided with, and be needle-like conductive bar structure, be axis, on metal plate 8 surfaces, be provided with combustion platform 6 with metal electrode 7 around metal electrode 7; The top of metal electrode 7 exceeds combustion platform 6 surfaces and is provided with.
The experimental technique that present embodiment is used this experimental provision comprises following key step:
1) hi-line is located certain altitude directly over being arranged in combustion platform 6, record wire type and height.Metal electrode 7 is by linking to each other and ground connection with metal plate 8, and 1～2cm is stretched out from combustion platform 6 centers in metal electrode 7 tops, serves as ground-electrode, is convenient to observe the discharge path experiment.
2) selected combustion platform 6, the flame characteristic of demarcation combustion platform 6; The simulation burning things which may cause a fire disaster that combustion platform is placed is elected the grillage burning things which may cause a fire disaster as.
3) use calibrated combustion platform 6 to produce the combustion flame of enough height, analog conducting wire 5 is in the flame all the time.Progressively pressurize until the flashover discharge for analog conducting wire 5, measure wire voltage and ground current in this process.
4) adjust the type of combustion platform and power (in the present embodiment owing to select the grillage burning things which may cause a fire disaster for use, then the grillage number that can stack according to the adjustment of grillage combustion law) according to the combustion platform combustion law, change the distance of hi-line and ground-electrode, repeatedly test.Under the same terms, test 2-4 time.
In addition, test does not have the aerial voltage breakdown of hi-line, benchmark as a comparison under the flame situation.
By the contrast experiment, can specifically study the breakdown characteristics of clearance under the grillage fire action between the power frequency high voltage lead, and analyze flame high temperature and ionization the rule that influences breakdown characteristics.
Above-listed detailed description is at the specifying of the utility model possible embodiments, and this embodiment is not in order to limiting claim of the present utility model, does not allly break away from the equivalence that the utility model does and implements or change, all should be contained in the claim of this case.
Claims (1)
1. a simulating forest fire causes the experimental provision that the ultra-high-tension power transmission line flashover discharges, it is characterized in that: comprise the power-frequency voltage generator (1), connection lead (11), the analog conducting wire (5) that connect successively, connect lead (11) and be connected on the end of analog conducting wire (5), on connection lead (11), also be connected with power-frequency voltage voltage divider (2); Be used to the adjustment height hitch (3) that is connected the both sides of analog conducting wire (5) and hangs analog conducting wire (5), be provided with insulator (4) between hitch (3) and the analog conducting wire (5); Be provided with refractory masses (9) on the ground under the analog conducting wire (5), refractory masses (9) is provided with metal plate (8), and an end of metal plate (8) is connected to earth terminal (10); Metal plate (8) surface is connected with metal electrode (7), metal electrode (7) vertically is provided with, and be needle-like conductive bar structure, be axis, on metal plate (8) surface, be provided with combustion platform (6) that with metal electrode (7) top of described metal electrode (7) exceeds combustion platform (6) surface around metal electrode (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200960987U CN202057763U (en) | 2011-04-02 | 2011-04-02 | Experimental device of simulating high voltage transmission line flashover discharge triggered by forest fire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200960987U CN202057763U (en) | 2011-04-02 | 2011-04-02 | Experimental device of simulating high voltage transmission line flashover discharge triggered by forest fire |
Publications (1)
| Publication Number | Publication Date |
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| CN202057763U true CN202057763U (en) | 2011-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011200960987U Expired - Fee Related CN202057763U (en) | 2011-04-02 | 2011-04-02 | Experimental device of simulating high voltage transmission line flashover discharge triggered by forest fire |
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| CN (1) | CN202057763U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162830A (en) * | 2011-04-02 | 2011-08-24 | 中国南方电网有限责任公司超高压输电公司梧州局 | Experimental device for simulating high-voltage transmission line flashover discharge caused by forest fire |
| CN103472326A (en) * | 2013-08-28 | 2013-12-25 | 南京南瑞集团公司 | Method for evaluating probability of forest fire induced transmission line fault |
| CN104049187A (en) * | 2014-06-18 | 2014-09-17 | 公安部四川消防研究所 | Interphase high-impedance discharging arc and fire risk experimental device |
| CN110927528A (en) * | 2019-12-12 | 2020-03-27 | 广西电网有限责任公司电力科学研究院 | Transmission line fault simulation test device |
-
2011
- 2011-04-02 CN CN2011200960987U patent/CN202057763U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162830A (en) * | 2011-04-02 | 2011-08-24 | 中国南方电网有限责任公司超高压输电公司梧州局 | Experimental device for simulating high-voltage transmission line flashover discharge caused by forest fire |
| CN103472326A (en) * | 2013-08-28 | 2013-12-25 | 南京南瑞集团公司 | Method for evaluating probability of forest fire induced transmission line fault |
| CN103472326B (en) * | 2013-08-28 | 2016-06-22 | 国网电力科学研究院 | The method that assessment mountain fire causes transmission line malfunction probability |
| CN104049187A (en) * | 2014-06-18 | 2014-09-17 | 公安部四川消防研究所 | Interphase high-impedance discharging arc and fire risk experimental device |
| CN110927528A (en) * | 2019-12-12 | 2020-03-27 | 广西电网有限责任公司电力科学研究院 | Transmission line fault simulation test device |
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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: 20111130 Termination date: 20140402 |