CN102564717A - Overhead conductor galloping testing device and testing method on basis of gear-end displacement excitation - Google Patents
Overhead conductor galloping testing device and testing method on basis of gear-end displacement excitation Download PDFInfo
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- CN102564717A CN102564717A CN2012100211431A CN201210021143A CN102564717A CN 102564717 A CN102564717 A CN 102564717A CN 2012100211431 A CN2012100211431 A CN 2012100211431A CN 201210021143 A CN201210021143 A CN 201210021143A CN 102564717 A CN102564717 A CN 102564717A
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Abstract
The invention discloses an overhead conductor galloping testing device and an overhead conductor galloping testing method on the basis of the gear-end displacement excitation and belongs to the technical field of galloping prevention of an overhead conductor. The testing device comprises conductor hanging devices, a transverse driving device, the overhead conductor and insulator strings. The conductor hanging devices are fixed on the ground. Both ends of the overhead conductor are respectively connected with two conductors hanging devices through the insulator strings. The transverse driving device is connected with the insulator strings. The testing method is implemented by steps of determining a measured point, loading, recording, analyzing and the like. According to the invention, the transverse driving device is matched with the overhead conductor to simulate the galloping condition of the overhead conductor in practice when the overhead conductor is subjected to gear-end displacement excitation along the direction of the overhead conductor; the testing device and the testing method are used for researching the galloping rules of the overhead conductor under the conditions of different spans, different excitation frequencies and different excitation amplitude; the defect of conventionally only carrying out galloping excitation on the conductor in the direction vertical to the overhead conductor is overcome; testers can more comprehensively know the galloping mechanism of the overhead conductor so as to give the galloping prevention measures.
Description
Technical field
The present invention relates to a kind of aerial condutor and wave simulation test platform and test method, belong to aerial condutor anti-dance technical field, especially a kind of aerial condutor based on the excitation of shelves end movement is waved test unit and test method.
Background technology
It is one of problem that harm is big, strick precaution is relatively more difficult in the technology of transmission of electricity field that transmission line wire is waved.Transmission line galloping is meant a kind of low frequency (being about 0.1-3Hz) that produces at wind effect lower wire, the lead autovibration of large amplitude, and peak swing can reach about 5-300 times of diameter of wire.This motion can cause very big dynamic stress, can make lead, gold utensil and shaft tower cause very big destruction sometimes.
For fear of conductor galloping, need be to conductor galloping mechanism, become the dance condition, wave aspect such as rule and further investigate.In the process of research, need to build the aerial condutor test platform and simulate conductor galloping, in order to analyzing, seek the rule of waving of aerial condutor to waving.
Under the wind effect; Lead is swung on the horizontal path direction; Can cause that the insulator chain hanging wire point of its connection produces the displacement of road along the line direction, be equivalent to adjacent shelves lead has been applied a shelves end movement excitation, will produce certain influence waving of adjacent shelves aerial condutor.
At present, relating to aerial condutor, to wave having of test platform a variety of, and major part all is through proportional the dwindling of single grade of lead in the reality; Utilize column simulation iron tower, set up lead between the iron tower, load instantaneous excitation through test point at lead; Make lead produce vibration and test, mostly wherein instantaneous excitation is the vibrator realization, only can vibrate by analog conducting wire; Can not form and wave, therefore can not carry out research conductor galloping mechanism.In addition, the experiment porch of lead vertical loading has only been considered the excitation of horizontal path method influences aerial condutor, and the shelves end movement that does not relate on the direction of road along the line encourages the influence to aerial condutor.
In the patent No. is to disclose a kind of testing machine of waving in 2004201103810.0, and this testing machine is to utilize two cover crank linkage analog conducting wire ellipses to wave track fully, simulates waving that big leap aerial condutor produces behind icing; This core technology of waving testing machine is a vibrator, the track ovalize of its xsect when vibrator makes conductor galloping, and oval major and minor axis has different variations with the external environment difference, and the center line of major axis also can produce deflection with the external force difference.This testing machine utilizes mechanical drive to come waving of analog conducting wire, is used to study lead and bears the ability of waving, but do not relate to the simulation of conductor galloping mechanism, can not wave mechanism research.
Summary of the invention
The technical matters that the present invention will solve provides a kind of aerial condutor based on the excitation of shelves end movement and waves test unit and test method; This device can be good at simulating along the excitation of the aerial condutor direction influence to conductor galloping, further studies aerial condutor and waves mechanism.
For solving the problems of the technologies described above; The technical scheme that the present invention taked is: a kind of aerial condutor based on the excitation of shelves end movement is waved test unit; Comprise thread-laying device, lateral driver device, aerial condutor and insulator chain; Said thread-laying device is fixed in ground, and the two ends of said aerial condutor are connected with two thread-laying devices through insulator chain respectively, and said lateral driver device is connected with insulator chain.The present invention provides a low-frequency excitation by a small margin that continues that acts on grade horizontal direction of end through lateral driver device to the aerial condutor in the thread-laying device; Make the measurement point on the aerial condutor reach into the dance condition; Can study the influence of different spans, different excitation frequency, different excitation amplitude, further study aerial condutor and wave mechanism conductor galloping.
Said structure is done further qualification; Said lateral driver device comprises the push rod that can move horizontally, and said push rod and fixed mount are slidingly matched, and the left end of push rod contacts with eccentric wheel through dull and stereotyped; The outside of push rod is socketed with and is used for the spring that push rod resets; Side contacts in one end of said spring and the fixed mount, the other end contacts with said flat board, and said fixed mount is through the support fixation of base.Push rod among the present invention is connected with the lower end of insulator chain; Through eccentric uniform rotation, the vibration that makes the end of push rod is a simple harmonic oscillation, can a sinusoidal lasting excitation be arranged to lead; This sinusoidal excitation can make conductor galloping on the one hand; Sinusoidal excitation is one to have the energisation mode of remarkable rule on the other hand, and its excited frequency is single, convenient research when subsequent treatment.
Said structure is done further qualification, and said lateral driver device is the toggle of being made up of connecting rod slider and swiveling wheel, or has the cylinder of double.Toggle among the present invention and cylinder can realize that also excitation wire waves, study it and wave rule, but the vibration frequency complicated component that this dual mode produced, so test effect is obvious not as eccentric wheel structure.
Said structure is done further qualification, and said thread-laying device comprises the cross-arm of horizontal positioned, and the end of said cross-arm is provided with the hook that is connected with insulator chain, and the middle part of cross-arm is fixed with the holder of vertical cross-arm.Holder among the present invention and cross-arm are used for simulating the iron tower of reality, make this device more can reflect the situation in the reality, increase the accuracy of model configuration.
Said structure is done further qualification; Said thread-laying device be provided with three and more than; Be connected with insulator chain through aerial condutor between the adjacent thread-laying device, form many grades of aerial condutor the present invention thread-laying device is connected, can study in the many grades of aerial condutors; The situation of waving of a plurality of measurement points can fully reflect and wave rule.
Test method based on the aerial condutor of shelves end movement excitation is waved is characterized in that the step of said test method is following:
(1) after said test unit was put up, the span of measurement bay hollow wire, ratio carried and sag;
(2) confirm measurement point, settle high speed camera, and start high speed camera in the position of measurement point;
(3) confirm load(ing) point, start lateral driver device, aerial condutor is carried out the loading of shelves end transversal displacement excitation;
(4) the record load time, the vibration frequency of lateral driver device and vibration amplitude;
(5) extract the high speed camera data, the analytical test result draws the track of waving of measurement point on the aerial condutor.
Preferably, said lateral driver device, the vibration frequency of its transversely excited is 0.1-20Hz, Oscillation Amplitude is 1-20mm.Because conductor galloping is low-frequency vibration, the excited vibration frequency does not require too high, generally is controlled at 0.1-20Hz and gets final product among the present invention.Adopt the beneficial effect that technique scheme produced to be: the present invention cooperates aerial condutor through lateral driver device; Simulate iron tower sets up in the reality the lead situation of waving when receiving the excitation on the aerial condutor direction; Be used to study under different spans, different vibration frequency and the different vibration amplitude; Aerial condutor is waved rule; Remedied tradition and only carried out the deficiency of vertical drive conductor vibration, made testing crew can fully understand that more aerial condutor waves mechanism, avoided the generation of waving thereby propose innovative approach; Test method among the present invention is to propose to this test unit, and this device is simple, easy to operate, and can be good at simulating aerial condutor and wave, and tests easy understanding, easy master to this professional.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation.
Fig. 1 is a structural representation of the present invention;
Fig. 2 is that two grades of aerial condutors are waved the test unit structural representation;
Fig. 3 is the another kind of embodiment of Fig. 2;
Fig. 4 is the lateral driver device synoptic diagram of eccentric mechanism;
Fig. 5 is the lateral driver device synoptic diagram of toggle;
Fig. 6 is the lateral driver device synoptic diagram of double cylinder;
Wherein: 1, lateral driver device, 2, cross-arm, 3, holder, 4, aerial condutor, 5, insulator chain, 6, base, 7, eccentric wheel, 8, fixed mount, 9, spring, 10, push rod, 11, connecting rod, 12, slide block, 13, swiveling wheel, 14, air pump, 15, cylinder.
Embodiment
Can know according to accompanying drawing 1; The present invention is specifically related to a kind of aerial condutor based on shelves end movement excitation and waves test unit and comprise thread-laying device, lateral driver device 1, aerial condutor 4 and insulator chain 5; Thread-laying device is fixed in ground; The two ends of aerial condutor 4 are connected with two thread-laying devices through insulator chain 5 respectively, and lateral driver device 1 is connected with insulator chain 5, and thread-laying device comprises the cross-arm 2 of horizontal positioned; The end of cross-arm 2 is provided with the hook that is connected with insulator chain 5, the middle part of cross-arm 2 be fixed with vertical cross-arm 2 holder 3,
Can know that according to accompanying drawing 2 thread-laying device is arranged side by side three, be mounted with insulator chain 5, through aerial condutor 4 series connection, form two grades of leads between the adjacent thread-laying device in cross-arm 2 ends of thread-laying device.Can study on the measurement points different on two grades of leads aerial condutor 4 based on this device and wave situation, sum up many grades of aerial condutors situation that influences to iron tower in the circuit when waving, avoid the harm that brings because of waving from the whole piece circuit.
In accompanying drawing 3, be arranged side by side three thread-laying devices, point of excitation mediates on the insulator chain of wire-binding device, also can on many grades of circuits, set a plurality of exciting banks, analyzes different point of excitation, and different excitation numbers are to the conductor galloping situation.
Wherein accompanying drawing 4,5 and 6 is three kinds of different embodiments of lateral driver device 1, and wherein accompanying drawing 4 is the lateral driver device of eccentric mechanism, comprises the push rod 10 that can move horizontally; Push rod 10 is slidingly matched with fixed mount 8; The left end of push rod 10 contacts with eccentric wheel 7 through dull and stereotyped, and the outside of push rod 10 is socketed with and is used for the spring 9 that push rod 10 resets, side contacts in an end of spring 9 and the fixed mount 8; The other end contacts with said flat board, and fixed mount 8 is through the support fixation of base 6.Eccentric wheel 7 drives through frequency modulation motor, and it is at the uniform velocity rotated, and drives push rod 10 tangential movements, and wherein the end of push rod 10 is simple harmonic oscillation, and it gives the excitation of 4 one sinusoidal wave forms of aerial condutor.
The lateral driver device of accompanying drawing 6 double cylinders, this device is through the piston motion of air pump 14 drive cylinders 15, and this structural vibration frequency is not easy control, and frequency adjustment range is too little, and in use has uncertain noise vibration.
Except three kinds of above-mentioned lateral driver devices, other can realize the mechanism of reciprocal tangential movement, all can be applicable to the present invention, realizes the purpose that aerial condutor is waved, and it all comprises within the scope in the present invention.Base 6 can be set to adjustable for height device in addition, is used to adapt to the test platform of differing heights, to improve practicality of the present invention.
According to the above, sum up the test method of waving by device based on the aerial condutor of shelves end movement excitation, its step is following:
(1) after said test unit was put up, the span of measurement bay hollow wire, ratio carried and sag;
(2) confirm measurement point, can confirm 2-3 measurement point, settle high speed camera, and start high speed camera in the position of measurement point;
(3) confirm load(ing) point, start lateral driver device 1, aerial condutor 4 is carried out the loading that shelves end transversal displacement encourages, the vibration frequency that wherein requires lateral driver device 1 given transversely excited is 0.1-20Hz, and Oscillation Amplitude is 1-20mm;
(4) the record load time requires the load time need satisfy from beginning to be loaded at aerial condutor 4 measurement points and becomes the later time period of dance, writes down the vibration frequency and the vibration amplitude of lateral driver device 1 then;
(5) extract the high speed camera data, the analytical test result, measurement point is waved track on the drafting aerial condutor 4.
What the high speed camera among the present invention adopted is the RMC-6740GE model camera that Denmark JAT company produces, and its SF is 200Fps, can know and gather the measurement point track, satisfies requirement of the present invention.
The present invention is through the several times test; The aerial condutor of measuring under different spans, different excitation frequency and the different excitation amplitude 4 is waved track, and the result is analyzed, and draws out aerial condutor and waves track; Sum up each factor to waving influence degree, find out the measure of avoiding aerial condutor to wave.
Claims (7)
1. the aerial condutor based on the excitation of shelves end movement is waved test unit; It is characterized in that: comprise thread-laying device, lateral driver device (1), aerial condutor (4) and insulator chain (5); Said thread-laying device is fixed in ground; The two ends of said aerial condutor (4) are connected with two thread-laying devices through insulator chain (5) respectively, and said lateral driver device (1) is connected with insulator chain (5).
2. the aerial condutor based on the excitation of shelves end movement according to claim 1 is waved test unit; It is characterized in that said lateral driver device (1) comprises the push rod (10) that can move horizontally; Said push rod (10) is slidingly matched with fixed mount (8); The left end of push rod (10) contacts with eccentric wheel (7) through dull and stereotyped, and the outside of push rod (10) is socketed with and is used for the spring (9) that push rod (10) resets, an end of said spring (9) and the interior side contacts of fixed mount (8); The other end contacts with said flat board, and said fixed mount (8) is through the support fixation of base (6).
3. the aerial condutor based on the excitation of shelves end movement according to claim 1 is waved test unit; It is characterized in that the toggle of said lateral driver device (1), or have the cylinder (15) of double for forming by connecting rod (11), slide block (12) and swiveling wheel (13).
4. the aerial condutor based on the excitation of shelves end movement according to claim 1 is waved test unit; It is characterized in that said thread-laying device comprises the cross-arm (2) of horizontal positioned; The end of said cross-arm (2) is provided with the hook that is connected with insulator chain (5), and the middle part of cross-arm (2) is fixed with the holder (3) of vertical cross-arm (2).
5. the aerial condutor based on the excitation of shelves end movement according to claim 4 is waved test unit; It is characterized in that: said thread-laying device be provided with three and more than; Be connected with insulator chain (5) through aerial condutor (4) between the adjacent thread-laying device, form many grades of aerial condutors.
6. by the described test method of waving test unit of claim 1-5, it is characterized in that the step of said test method is following based on the aerial condutor of shelves end movement excitation:
(1) after said test unit was put up, the span of measurement bay hollow wire (4), ratio carried and sag;
(2) confirm measurement point, settle high speed camera, and start high speed camera in the position of measurement point;
(3) confirm load(ing) point, start lateral driver device (1), aerial condutor (4) is carried out the loading of shelves end transversal displacement excitation;
(4) the record load time, the vibration frequency and the vibration amplitude of lateral driver device (1);
(5) extract the high speed camera data, the analytical test result draws the track of waving that aerial condutor (4) is gone up measurement point.
7. test method according to claim 6 is characterized in that said lateral driver device, and the vibration frequency of its transversely excited is 0.1-20Hz, and Oscillation Amplitude is 1-20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210021143.1A CN102564717B (en) | 2012-01-13 | 2012-01-13 | Based on aerial condutor galloping test device and the test method of the excitation of shelves end movement |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210021143.1A CN102564717B (en) | 2012-01-13 | 2012-01-13 | Based on aerial condutor galloping test device and the test method of the excitation of shelves end movement |
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| CN102564717A true CN102564717A (en) | 2012-07-11 |
| CN102564717B CN102564717B (en) | 2015-08-26 |
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Cited By (7)
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| CN103499497A (en) * | 2013-10-11 | 2014-01-08 | 华北电力大学（保定） | Overhead line bending rigidity measuring device |
| CN109000870A (en) * | 2018-09-21 | 2018-12-14 | 武汉大学 | Transmission line galloping electromagnetism excitation system and method |
| CN109374249A (en) * | 2018-11-08 | 2019-02-22 | 国网浙江省电力有限公司电力科学研究院 | Analog conducting wire carries out the wire clamp test platform of arbitrary curve swing under wind excitation |
| CN109406083A (en) * | 2018-11-08 | 2019-03-01 | 国网新疆电力有限公司电力科学研究院 | A kind of overhanging golden tool string wind excited vibration Wearing Simulated Test platform |
| CN110160899A (en) * | 2019-05-31 | 2019-08-23 | 武汉大学 | A kind of device applying alternation tension to high-voltage conducting wires |
| CN113819950A (en) * | 2021-09-26 | 2021-12-21 | 通鼎互联信息股份有限公司 | Test equipment and test method for wind-induced vibration and galloping performance of optical cable |
| CN117917552A (en) * | 2024-03-18 | 2024-04-23 | 中铁电气化局集团有限公司 | Insulator state detection method for electrified railway |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499497A (en) * | 2013-10-11 | 2014-01-08 | 华北电力大学（保定） | Overhead line bending rigidity measuring device |
| CN103499497B (en) * | 2013-10-11 | 2015-11-18 | 华北电力大学（保定） | A kind of pole line measurer for curve rigid |
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| CN109000870B (en) * | 2018-09-21 | 2024-03-15 | 武汉大学 | Transmission line galloping electromagnetic excitation system and method |
| CN109374249A (en) * | 2018-11-08 | 2019-02-22 | 国网浙江省电力有限公司电力科学研究院 | Analog conducting wire carries out the wire clamp test platform of arbitrary curve swing under wind excitation |
| CN109406083A (en) * | 2018-11-08 | 2019-03-01 | 国网新疆电力有限公司电力科学研究院 | A kind of overhanging golden tool string wind excited vibration Wearing Simulated Test platform |
| CN109406083B (en) * | 2018-11-08 | 2023-12-05 | 国网新疆电力有限公司电力科学研究院 | Suspension string hardware wind excitation vibration abrasion simulation test platform |
| CN109374249B (en) * | 2018-11-08 | 2023-12-26 | 国网浙江省电力有限公司电力科学研究院 | Wire clamp test platform for simulating random curve swing of wire under wind excitation |
| CN110160899A (en) * | 2019-05-31 | 2019-08-23 | 武汉大学 | A kind of device applying alternation tension to high-voltage conducting wires |
| CN113819950A (en) * | 2021-09-26 | 2021-12-21 | 通鼎互联信息股份有限公司 | Test equipment and test method for wind-induced vibration and galloping performance of optical cable |
| CN117917552A (en) * | 2024-03-18 | 2024-04-23 | 中铁电气化局集团有限公司 | Insulator state detection method for electrified railway |
| CN117917552B (en) * | 2024-03-18 | 2024-06-04 | 中铁电气化局集团有限公司 | Insulator state detection method for electrified railway |
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