CN103197126A - Lightning induction overvoltage simulation test platform - Google Patents
Lightning induction overvoltage simulation test platform Download PDFInfo
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- CN103197126A CN103197126A CN2013101186802A CN201310118680A CN103197126A CN 103197126 A CN103197126 A CN 103197126A CN 2013101186802 A CN2013101186802 A CN 2013101186802A CN 201310118680 A CN201310118680 A CN 201310118680A CN 103197126 A CN103197126 A CN 103197126A
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Abstract
The invention relates to the lightning induction correlative technical field, in particular to a lightning induction overvoltage simulation test platform. The lightning induction overvoltage simulation test platform comprises a square wave voltage generating device, a simulation lighting current channel, a simulation experiment circuit and a testing device, wherein the simulation lighting current channel comprises an insulator vertical to the ground, a conductive body winding outside the insulator and an air suspension device connected with the top of the insulator. One end of the conductive body is connected with the square wave voltage generating device, the simulation experiment circuit is parallel to the ground, and the simulation lighting current channel and the simulation experiment circuit are parallel. The testing device comprises a lighting monitoring device arranged on the bottom of the simulation lighting current channel, an overvoltage measuring device connected with the simulation experiment circuit and a display device which is respectively connected with the lighting monitoring device and the overvoltage measuring device. The lightning induction overvoltage simulation test platform has the advantages that distortion degrees of waveforms of induction overvoltage is small, tests can be conveniently carried out, price is low, and quality is high.
Description
Technical field
The present invention relates to the lightning induction correlative technology field, particularly relate to the thunder and lightning induction voltage analogue test platform.
Background technology
At present, the researcher of a lot of thunder and lightning induction voltages has carried out the different simulation test research of scheme, but the testing program of thunder and lightning induction voltage simulation test is often far from each other, the difference that parameter is selected is also bigger, this is because when the simulation test conceptual design, and is very difficult exhaustive, makes the distortion of each side accomplish minimum simultaneously, the emphasis difference of research, the testing program of selection are also just different naturally.
Wherein, 1999, there is the researchist of three Japan once to describe a typical superpotential scale model test, it has set up the circuit of 1/20 a contracting ratio, long 25m, and terrain clearance is 0.5m, have only a lead, radius is 0.5mm, the build-out resistor of two terminations, 430 Ω.Use a long 28m, radius is that the insulation rod of 1.5cm comes equivalent lightning current passage, sling with balloon in the upper end, having twined a root radius at insulation rod is the copper cash of 0.5mm, the length of copper cash is three times of insulation rod length, electric current on the copper cash is being c/3 perpendicular to the speed of development on the direction of ground like this, and approximate nature lightning is fought back the speed of development of electric current.In the bottom of ear of maize, injecting a peak value toward copper cash is 1A, and the wavefront time is about the electric current of 20ns, with the counterattack electric current in the imitation thunder and lightning passage.Directly use the voltage on the oscilloscope measurement circuit at the two ends of circuit, make Current Transformer measure current waveform in the bottom of ear of maize, frequency response range is from 8.5kHz to 100MHz, and the use plate aerial comes the electromagnetic field in the measurement space, and frequency response range is from 2kHz to 10MH.
Again at the beginning of 21 century, there is the researchist in Europe once to describe another relatively more typical thunder and lightning induction voltage subscale test, the contracting ratio of whole test is 1/50, the long 28m of whole piece circuit, apart from the high 0.2m in ground, it is that the bare copper wire of 0.4mm carries out equivalence that lead adopts a root radius, is covered with the high-quality conductor of one deck 28 * 9m2 below circuit, with the simulate ideal the earth, the circuit two ends are connected to the build-out resistor that resistance is 455 Ω.Use a long 12m, radius is that the insulation rod of 25.4mm is simulated the lightning current passage, and twining a root radius on the insulation rod is the copper wire of 0.7mm, and every meter twines 323 circles, and impedance is about 2.2k Ω, and the current requirements wavefront time of feeding is less than 60ns.
The thunder and lightning induction voltage simulation test is the simulation reproduction for true type test, it relatively easily carries out enforcement, also control for various parameters easily, carry out Study on Regularity, this is the advantage place of simulation test, but its size is less simultaneously, and also there is the distortion of degree varies in each side certainly for the reproduction of truth, thereby causes the distortion of net result.
Prior art can't make the distortion of thunder and lightning induction voltage simulation test each side accomplish minimum simultaneously, is on the one hand to be difficult to realize in technical conditions, and the emulation degree that improves a part of content is cost with the emulation degree of sacrificing another part content often; On the other hand, do the cost that tends to improve test like this, simulation test is lost originally have carry out conveniently, advantage that cost is cheap.
Summary of the invention
Based on this, be necessary the bigger technical matters of thunder and lightning induction voltage simulation test distortion at prior art, a kind of thunder and lightning induction voltage analogue test platform is provided.
A kind of thunder and lightning induction voltage analogue test platform, comprise: the square-wave voltage generating means, simulation lightning current passage, simulated experiment circuit and proving installation, described simulation lightning current passage comprises insulator perpendicular to the ground, be wrapped in the electric conductor of described insulator exterior, and the aerial levitation device that is connected with described insulator head, one end of described electric conductor is connected with described square-wave voltage generating means, described simulated experiment circuit is parallel to the ground, and described simulation lightning current passage is parallel with the simulated experiment circuit, described proving installation comprises the lightning monitoring device that is arranged on described simulation lightning current channel bottom, the over-voltage measurement device that is connected with described simulated experiment circuit, and the display device that connects described lightning monitoring device and over-voltage measurement device respectively.
Therein among embodiment, described square-wave voltage generating means comprises AC power frequency voltage source, rectifier, pulse-forming line, spark switch cavity and the pulse transmission line that connects successively, be provided with spark switch in the described spark switch cavity, and charge into high pressure nitrogen in the described spark switch cavity.。
Therein among embodiment, described lightning monitoring device comprises voltage divider and current amplifier, described display device is oscillograph, described voltage divider is connected with oscillographic first voltage input end, described current amplifier is connected with oscillographic current input terminal, described over-voltage measurement device is voltage probe, and an end of described voltage probe is connected with described simulated experiment circuit, and the other end is connected with oscillographic second voltage input end.
Among embodiment, described simulation lightning current passage is over against the center of described simulated experiment circuit, and an end of described voltage probe is connected with the center of described simulated experiment circuit therein.
Among embodiment, also comprise the electric field measurement device that is arranged on described simulated experiment circuit below therein, described electric field measurement device is connected with described display device.
Therein among embodiment, described electric field measurement device comprises light source generator, photoreceiver and electric field probe, described electric field probe is arranged on described simulated experiment circuit below, one end of described electric field probe is connected with light source generator, the other end is connected with the input end of photoreceiver, and the output terminal of described photoreceiver is connected with described display device.
Among embodiment, be equipped with ground connection iron plate below described simulation lightning current passage below and the described simulated experiment circuit therein.
Therein among embodiment, described simulated experiment Route Length contracting is than being 1/20, and the current amplitude of described simulation lightning current passage contracts than being 1/1000.
Above-mentioned thunder and lightning induction voltage analogue test platform, because the interference that the space electric field is subjected in the test platform is less, therefore the distortion that produces is less relatively, the degree of distortion of the induced overvoltage waveform of gained is also less; And device parameter is controlled, and test is carried out conveniently, and is excellent honest and clean at a low price.
Description of drawings
Fig. 1 is the structural representation of a kind of thunder and lightning induction voltage analogue test platform of the present invention;
Fig. 2 is for being the construction module figure of square-wave voltage generating means.
Embodiment
The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.
Be illustrated in figure 1 as the structural representation of a kind of thunder and lightning induction voltage analogue test platform of the present invention, comprise: square-wave voltage generating means 110, simulation lightning current passage 120, simulated experiment circuit 130 and proving installation, described simulation lightning current passage 120 comprises insulator perpendicular to the ground, be wrapped in the electric conductor of described insulator exterior, and the aerial levitation device that is connected with described insulator head (Fig. 1 is vertical view, so insulator, electric conductor and aerial levitation device all do not specifically illustrate), one end of described electric conductor is connected with described square-wave voltage generating means 110, described simulated experiment circuit 130 is parallel to the ground, and described simulation lightning current passage 120 is parallel with simulated experiment circuit 130, described proving installation comprises the lightning monitoring device that is arranged on described simulation lightning current passage 120 bottoms, the over-voltage measurement device that is connected with described simulated experiment circuit 130, and the display device that connects described lightning monitoring device and over-voltage measurement device respectively.
Simulated experiment circuit and ground have certain distance, corresponding actual grid line highway section.Simulation lightning current passage 120 is positioned at a distance, range simulation experimental line 130 center, corresponding actual lightning current passage.
The trunk of simulation lightning current passage 120 is insulator, and by aerial levitation device suspension, aerial levitation device for example can adopt realizations such as helium balloon, make the insulator of simulation lightning current passage 120 keep vertical with ground, electric conductor can adopt the outside surface at insulator to twine the copper wire realization, make electric current have velocity of propagation fast in the vertical ground direction like this, be about 1/3rd of the light velocity, situation basically identical when with reality thunderbolt taking place, square-wave voltage generating means 110 is connected with the electric conductor of simulation lightning current passage 120, the electric current that produces propagates into the top, the generation of simulation thunder and lightning from simulation lightning current passage 120 bottoms.By being located at the lightning monitoring device of simulation lightning current passage 120 bottoms, and the over-voltage measurement device that is connected with described simulated experiment circuit 130 monitors respectively, the collection data, and show in display device.
Situation basically identical when the lightning current passage of the present invention's simulation makes the velocity of propagation of electric current on the vertical ground direction and actual generation thunderbolt.Size of the present invention is relatively large, and is truer for the simulation of actual conditions, and carry out in the place out of doors, and spacious relatively all around, the interference that space electric field is subjected to is less, and the distortion of generation is also less relatively.
Square-wave voltage generating means 110 of the present invention is used for taking place the simulation lightning current, its concrete structure, and those of ordinary skills can replenish after reading this patent.
Be illustrated in figure 2 as the construction module figure of square-wave voltage generating means, therein among embodiment, described square-wave voltage generating means 110 comprises AC power frequency voltage source 111, rectifier 112, pulse-forming line 113, spark switch cavity 114 and the pulse transmission line 115 that connects successively, be provided with spark switch in the described spark switch cavity 114, and charge into high pressure nitrogen 116 in the described spark switch cavity 114.112 rectifications become dc high voltage later on to AC power frequency voltage in the AC power frequency voltage source 111 through rectifier, and paired pulses formation line 113 charges, when the voltage magnitude on the pulse-forming line 113 reaches the flashover voltage of the spark switch 114 that is filled with high pressure nitrogen 117, form high pressure nanosecond ripple, and propagate by pulse transmission line 115.Described spark switch cavity 114 is a metallic cylinder that is provided with spark switch, and there are two parallel-plate circle electrodes inside, and charges into high pressure nitrogen 116.Square-wave voltage generating means of the present invention can make the flat-topped wave rising edge of output in the rank of 1 nanosecond, and the square wave amplitude of output is higher, meets the requirement of high-potting.The square-wave voltage generating means preferably adopts the nanosecond wave impulse generator of Tsing-Hua University's department of electrical engineering gas discharge laboratory development.
Lightning monitoring device of the present invention, over-voltage measurement device and display device, those of ordinary skills can specifically replenish after reading this patent.
Therein among embodiment, described lightning monitoring device comprises voltage divider 141 and current amplifier 142, described display device is oscillograph 143, described voltage divider 141 is connected with first voltage input end of oscillograph 143, described current amplifier 142 is connected with the current input terminal of oscillograph 143, described over-voltage measurement device is voltage probe 144, one end of described voltage probe 144 is connected with described simulated experiment circuit 130, and the other end is connected with second voltage input end of oscillograph 143.Present embodiment adopts voltage divider that the voltage signal that collects is depressured on the oscillograph, in order to draw the waveform of test from oscillograph.
Therein among embodiment, described simulation lightning current passage 120 centers over against described simulated experiment circuit 130, and an end of described voltage probe 144 is connected with the center of described simulated experiment circuit 130.
It is superpotential that direct measuring circuit mid point produces that present embodiment adopts voltage probe 144, because the over-voltage waveform that induces is convenient to directly record in the lightning current passage of simulation in the line top just.
Among embodiment, also comprise the electric field measurement device that is arranged on described simulated experiment circuit 130 belows therein, described electric field measurement device is connected with described display device.
It is for modulatedemodulate from the light signal of light source accesses a voltage signal that present embodiment adds electric field probe, is convenient to the induced overvoltage waveform that obtains comparing.
Therein among embodiment, described electric field measurement device comprises light source generator 145, photoreceiver 146 and electric field probe 147, described electric field probe 147 is arranged on described simulated experiment circuit 130 belows, one end of described electric field probe 147 is connected with light source generator 145, the other end is connected with the input end of photoreceiver 146, and the output terminal of described photoreceiver 146 is connected with described display device.
Among embodiment, be equipped with ground connection iron plate below described simulation lightning current passage below and the described simulated experiment circuit therein.Preferably, iron plate is galvanized iron sheet 148.
Therein among embodiment, described simulated experiment Route Length contracting is than being 1/20, and the current amplitude of described simulation lightning current passage contracts than being 1/1000.The contracting of the length of present embodiment, electric current is more reasonable than value.
As an example, S is compared in the contracting of test length
αGet 1/20, simulated experiment circuit 130 long 14m, apart from ground 0.5m, the diameter of wire of simulated experiment circuit 130 is 0.5mm.Simulated experiment circuit 130 corresponding long 280m, apart from ground 10m, diameter of wire is the actual line highway section of 1cm.Simulation lightning current passage 120 long 12m are positioned at 2m place, range simulation experimental line 130 center, and corresponding actual (tube) length 240m then is apart from the lightning current passage of actual line highway section center 40m.
The trunk of simulation lightning current passage 120 is by 4 long 3m, the PVC plastic tube that diameter is about 3cm is formed by connecting, as described insulator, and by aerial levitation device suspension, in the present example, aerial levitation device is a helium balloon that diameter is 2.5m, make the insulator of simulation lightning current passage 120 keep vertical with ground, the copper wire that length overall is 36m is wrapped in the passage outside surface, electric conductor as simulation lightning current passage 120, make the velocity of propagation of electric current on the vertical ground direction be about 1/3rd of the light velocity like this, situation basically identical when with reality thunderbolt taking place, electric current propagates into the top from channel bottom approximately needs 120ns, and after this result that obtains of experimental measurement is with serious distortion.
It is the matched impedance of 620 Ω that simulated experiment circuit 130 two ends connect resistance, a slice 2m * 15m is laid in the below, thickness is the galvanized iron sheet 148 of 1mm, below simulation lightning current passage, lay a slice 3m * 4m, thickness is similarly the galvanized iron sheet 148 of 1mm as the condition of desirable the earth, and galvanized iron sheet 148 is by copper braid over braid ground connection, grounding body 149 by four at a distance of 1m, go deep into soil 20cm, diameter is that crooked chisel of 1cm is connected to each other and forms.
The electric current that square-wave voltage generating means 110 produces propagates on the simulation lightning current passage 120 by power cable 1410.
Square-wave voltage generating means 110, its ultimate principle as shown in Figure 2, be the AC power frequency voltage of 220V in the AC power frequency voltage source 111,112 rectifications become dc high voltage later on through rectifier, and paired pulses formation line 113 charges, when the voltage magnitude on the pulse-forming line 113 reaches the flashover voltage of the spark switch 114 that is filled with high pressure nitrogen 117, form high pressure nanosecond ripple, and propagate by pulse transmission line 115.When lightning current passage 120 was simulated in pulse transmission line 115 terminal connections, the current amplitude of formation was approximately tens amperes, and S is compared in current amplitude contracting at this moment
iValue be about 1/1000.
The voltage signal that simulation lightning current passage 120 bottoms measure is that 417: 1 voltage divider 141 step-downs insert oscillograph 143 later on by a no-load voltage ratio, and the current signal that measures inserts oscillographs 143 by current amplifier 142 backs of a 10A/V.
The light signal that light source generator 145 produces is through Optical Fiber Transmission, through electric field probe 147 electric field signal is modulated on the light signal, and finally accepted by photoreceiver 146, and photoreceiver 146 demodulates a voltage signal from light signal, insert oscillograph 143.And directly measure by voltage probe 144 in the superpotential that the induction of simulation test circuit 130 mid points produces.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (8)
1. thunder and lightning induction voltage analogue test platform, it is characterized in that, comprise: the square-wave voltage generating means, simulation lightning current passage, simulated experiment circuit and proving installation, described simulation lightning current passage comprises insulator perpendicular to the ground, be wrapped in the electric conductor of described insulator exterior, and the aerial levitation device that is connected with described insulator head, one end of described electric conductor is connected with described square-wave voltage generating means, described simulated experiment circuit is parallel to the ground, and described simulation lightning current passage is parallel with the simulated experiment circuit, described proving installation comprises the lightning monitoring device that is arranged on described simulation lightning current channel bottom, the over-voltage measurement device that is connected with described simulated experiment circuit, and the display device that connects described lightning monitoring device and over-voltage measurement device respectively.
2. thunder and lightning induction voltage analogue test platform according to claim 1, it is characterized in that, described square-wave voltage generating means comprises AC power frequency voltage source, rectifier, pulse-forming line, spark switch cavity and the pulse transmission line that connects successively, be provided with spark switch in the described spark switch cavity, and charge into high pressure nitrogen in the described spark switch cavity.
3. thunder and lightning induction voltage analogue test platform according to claim 1, it is characterized in that, described lightning monitoring device comprises voltage divider and current amplifier, described display device is oscillograph, described voltage divider is connected with oscillographic first voltage input end, described current amplifier is connected with oscillographic current input terminal, described over-voltage measurement device is voltage probe, one end of described voltage probe is connected with described simulated experiment circuit, and the other end is connected with oscillographic second voltage input end.
4. thunder and lightning induction voltage analogue test platform according to claim 3 is characterized in that, described simulation lightning current passage is over against the center of described simulated experiment circuit, and an end of described voltage probe is connected with the center of described simulated experiment circuit.
5. thunder and lightning induction voltage analogue test platform according to claim 1 is characterized in that, also comprises the electric field measurement device that is arranged on described simulated experiment circuit below, and described electric field measurement device is connected with described display device.
6. thunder and lightning induction voltage analogue test platform according to claim 5, it is characterized in that, described electric field measurement device comprises light source generator, photoreceiver and electric field probe, described electric field probe is arranged on described simulated experiment circuit below, one end of described electric field probe is connected with light source generator, the other end is connected with the input end of photoreceiver, and the output terminal of described photoreceiver is connected with described display device.
7. thunder and lightning induction voltage analogue test platform according to claim 1 is characterized in that, described simulation lightning current passage below and described simulated experiment circuit below are equipped with ground connection iron plate.
8. thunder and lightning induction voltage analogue test platform according to claim 1 is characterized in that, the contracting of described simulated experiment Route Length is than being 1/20, and the current amplitude of described simulation lightning current passage contracts than being 1/1000.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103364617A (en) * | 2013-07-28 | 2013-10-23 | 重庆市才诗科技发展中心 | Thunder and lightning test device and method |
| CN104820148A (en) * | 2015-05-05 | 2015-08-05 | 云南电网有限责任公司电力科学研究院 | Over-voltage measurement and simulation test platform of power transmission line |
| CN109444688A (en) * | 2018-11-15 | 2019-03-08 | 国网山西省电力公司大同供电公司 | A kind of lightning stroke analogue test platform of 10kV power distribution network insulated conductor and screen of trees |
| CN113252971A (en) * | 2021-05-12 | 2021-08-13 | 云南电网有限责任公司丽江供电局 | FDTD-based distribution line inductive lightning overvoltage calculation method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364617A (en) * | 2013-07-28 | 2013-10-23 | 重庆市才诗科技发展中心 | Thunder and lightning test device and method |
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| CN104820148A (en) * | 2015-05-05 | 2015-08-05 | 云南电网有限责任公司电力科学研究院 | Over-voltage measurement and simulation test platform of power transmission line |
| CN109444688A (en) * | 2018-11-15 | 2019-03-08 | 国网山西省电力公司大同供电公司 | A kind of lightning stroke analogue test platform of 10kV power distribution network insulated conductor and screen of trees |
| CN109444688B (en) * | 2018-11-15 | 2020-11-06 | 国网山西省电力公司大同供电公司 | 10kV distribution network insulated conductor and tree obstacle's thunderbolt analogue test platform |
| CN113252971A (en) * | 2021-05-12 | 2021-08-13 | 云南电网有限责任公司丽江供电局 | FDTD-based distribution line inductive lightning overvoltage calculation method |
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