CN104993424B - A kind of work transmission line construction sag observation method - Google Patents
A kind of work transmission line construction sag observation method Download PDFInfo
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- CN104993424B CN104993424B CN201510399855.0A CN201510399855A CN104993424B CN 104993424 B CN104993424 B CN 104993424B CN 201510399855 A CN201510399855 A CN 201510399855A CN 104993424 B CN104993424 B CN 104993424B
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Abstract
A kind of work transmission line is constructed sag observation method, establishes the mechanical model of tension force sag under stringing state, and the overhead line stress at each shaft tower various is calculated as following；According to stringing section is intended, it is determined that observation shelves, arrangement stringing field, calculate stringing end corresponding to observing shelves design sag and survey the tension value that tensioner is shown, startup is twisted, and tensioner, control sag are surveyed in observation.A kind of work transmission line construction sag observation method of the present invention, the relation between tension force, stress and sag, is introduced tension into overhead line Construction of Tension Stringing so that control circuit stress is simpler, direct；Solves the problem that sag is not observed on the Special section overhead transmission line tower such as high mountain, under tower simultaneously.
Description
Technical field
A kind of work transmission line construction sag observation method of the present invention, is related to transmission line of electricity monitoring field.
Background technology
The method that conventional observation overhead transmission line is led, ground wire sag is conventional, typically have abnormal method, etc. regular way, preset angle configuration
And look squarely four kinds of method.Regular way or the abnormal methods such as ordinary priority selection.When by objective condition limited can not use etc. regular way or different
During well-established law, preset angle configuration can be selected.When can not only use above-mentioned three kinds of methods, just use and look squarely method., should before sag is observed
Refering to circuit plane cross section, understand landform and sag situations such as, appropriate sag observation method is selected with reference to actual conditions, and
According to overhead line structures position detail list, and by falling temperature method be included in primary elongation conducting wire sag curve (curve by different temperatures to
Go out the sag of corresponding ruling span) etc. technical data, calculate corresponding observation data, finally observe sag (observation sag
When observed temperature should meet the temperature for representing wire surrounding air).
, 1) the regular way observation sag such as：
Parallelogram method is also known as etc. regular way, is the most frequently used observation sag method.When condition is permitted, should preferentially select
Etc. regular way.Concrete operation method：On adjacent two shaft tower of observation shelves, tied up by each measure downwards of overhead line hitch point apart from sag f
Prick sag plate or compass is set after drawing the marking at survey station end, then the sag plate at observation end directly uses visual observation, or
Observed with compass；When above-mentioned span is from f, a temperature value can be estimated according to the temperature on the day of stringing, with this temperature condition
F is selected, if during temperature Change, should colligation sag plate again；When observing sag, make the line of plane on two sag plates and make somebody a mere figurehead
Line minimum point is tangent, that is, reaches design requirement.
2), different regular way observation sag：
When the discrepancy in elevation is larger between observing the overhead line hitch point of shelves, in order to ensure that sight point of contact, can close to sag minimum point
Sag is observed using abnormal method.Concrete operation step：The not contour carry out sag observation in shelves both ends sag plate lashing location is observed, its
His equal regular way.
3), preset angle configuration observation sag：
Preset angle configuration observe sag the advantages of be：It is relatively fuzzyyer with visual observation overhead line point of contact for big span, use longitude and latitude
For instrument than more visible, observation is more accurate.With etc. regular way, abnormal method observation sag generally require operating personnel step on bar observe, angle
Method can compare safe ready directly in ground observation.Preset angle configuration observes sag, due to the difference of the putting position of theodolite, divides
For three kinds of situations：Span end angle method, out-span angle method and span end angle method.Concrete operation step：Theodolite position is determined, and
The discrepancy in elevation between review and observation shelves overhead line hitch point；Calculate sag observation angle at different temperatures；Stringing sag is adjusted, is made
The axis of overhead line and the sight of theodolite are tangent；It should once be checked immediately after overhead line hanging wire, observed result is inserted into arc
Hang down record sheet.
4) method observation sag, is looked squarely：
A kind of special shape of preset angle configuration observation sag when looking squarely method observation sag.Both identical points are all to use theodolite
Sag is observed, but the former view angle is 0 °, and the view angle of the latter is certain special angle being adapted with sag.In overhead line
In construction, the regular ways such as prioritizing selection, abnormal method and preset angle configuration observation sag are answered.If above-mentioned three kinds of methods are implemented to have any problem or not
During permission, it can be selected and look squarely method observation sag.The method of looking squarely applies in general to following conditions：Extreme terrain, overhead line sag is larger,
When sag is more than twice of shaft tower height；Using preset angle configuration often due to sight point of contact is excessively near away from hitch point, it is impossible to ensure
During sag quality.
The defects of traditional sag observation method, there is three：
(1)：Sag is not being observed on the Special section overhead transmission line tower such as high mountain jungle, under tower, for aerial
The security of line operation stress brings challenge, and conventional method is no longer applicable.
(2)：The essence of traditional sag observation method be direct observation sag this be direct observation sag this join indirectly
Number, and the essence of sag observation is to realize the design load of circuit operation stress, then the sag of traditional method observation is being changed
To error being present with design stress value during stress,
(3)：Traditional method is more arduous for technical staff, in the case of preset angle configuration is unsuitable, technology people
Member needs to climb up shaft tower observation sag, if larger error can be caused without suitable position, simultaneously for technical staff
Have certain potential safety hazard.
The content of the invention
For drawbacks described above, the present invention provides a kind of work transmission line construction sag observation method, from tension force, stress with
Relation between sag is set out, and is introduced tension into overhead line Construction of Tension Stringing so that control circuit stress is simpler, straight
Connect；Solves the problem that sag is not observed on the Special section overhead transmission line tower such as high mountain, under tower simultaneously.
The technical solution adopted in the present invention is：
A kind of work transmission line construction sag observation method, establish the mechanics mould of tension force sag under stringing state
Type, overhead line stress at each shaft tower various are calculated as following：
T1=T0+wh0
F1=ε T1=ε (T0+wh0)
T2=ε F1+wh1=ε2(T0+wh0)+wh1 (1)
Te=Tn+whn=εn(T0+wh0)+εn-1wh1+…whn
H in formulan--- the n-th speed position overhead line suspension point discrepancy in elevation (m), when the hitch point of stringing side is higher, hnTake just, otherwise take
It is negative, take 0 when both sides suspension point etc. is high；
The linear mass of w --- overhead line, N/m；
The overall drag coefficient of ε --- overhead line and coaster, (1.012-1.015)；
N --- observation shelves to stringing end coaster quantity；
Te--- stringing end pulling equipment tractive force, N；
Tn--- the tractive force of n-th speed position releasing pulley porch, N；
Fn--- the tractive force in n-th speed position releasing pulley exit, N；
If the discrepancy in elevation great disparity of each shelves is little, its average discrepancy in elevation is can use, therefore can be reduced to：
According to stringing section is intended, it is determined that observation shelves, arrangement stringing field, observation is calculated by formula (1) or formula (2)
The tension value that tensioner is shown is surveyed at stringing end corresponding to shelves design sag, and startup is twisted, and tensioner is surveyed in observation, controls arc
Hang down.
The survey tensioner includes pulling force sensor, and pulling force sensor is linked into the circuit of overhead line stringing state,
By the change of its tension value, to control the tension force during stringing, and then control circuit sag.
The pulling force sensor is linked into the wire clamp of Construction of Tension Stringing and is twisted between steel cable.
A kind of work transmission line construction sag observation method of the present invention, goes out from the relation between tension force, stress and sag
Hair, is introduced tension into overhead line Construction of Tension Stringing, will be surveyed tensioner and is linked into the wire clamp of Construction of Tension Stringing and be twisted steel cable
Between, the tension force during stringing, and then control circuit sag are controlled by the change of its tension value.So that control circuit should
Power is simpler, direct, while solves the difficulty that sag is not observed on the Special section overhead transmission line tower such as high mountain, under tower
Topic.
Brief description of the drawings
Fig. 1 is the design sketch of tension force sag of the present invention；
Wherein：1- is twisted, 2- pulling force sensors, line more than 3-, 4- pulleys, 5- observation shelves." → ", represents stringing direction.
Fig. 2 is the mechanical model figure of tension force sag under stringing state of the present invention.
Embodiment
A kind of work transmission line construction sag observation method,
1), in overhead transmission line engineering, overhead transmission line sag and stress, tension force relation typically by following two formula Lai
Embody：
Wherein f is sag, and l is span, and g is leads, ground wire ratio carries, and σ is stress, and γ leads for unit length, the deadweight of ground wire,
For Horizontal Tension, sag can be converted to by tension force according to formula.
2), the operation principle of pulling force sensor 2 is：Using suffered by the elastic deformation of flexible member or strain reflection and its
External force forms certain proportionate relationship and manufactured load-sensing unit.According to its feature, it is tight that pulling force sensor 2 is linked into overhead line
In the circuit of wire state, the tension force during stringing, and then control circuit sag are controlled by the change of its tension value.According to
The relation of line length and sag understands that the change of small line length can cause the change of larger sag, therefore can be by pulling force sensor 2
It is linked into the wire clamp of Construction of Tension Stringing and is twisted between steel cable.So design can ensure the pulling force sensor during sag observation
2 all the time in staff's observation scope.
3), the concrete thought of tension force sag is as shown in Figure 1：Observation shelves 5 are selected according to stringing section is intended, by pulling force
Sensor 2 is linked into the wire clamp of Construction of Tension Stringing and is twisted between steel cable, establish by be twisted 1, pulling force sensor 2, be twisted steel cable with
And wire clamp composition trailer system, by wire clamp connect more than line 3, startup be twisted 1, slowly tighten up and be twisted steel cable, observation shelves lead, ground wire
Slowly lifted by pulley 4, observe the display data of pulling force sensor 2, control sag reaches design load.
4), the theoretical formula of device for measuring force control observation shelves design stress：
Intend the stringing operating mode of stringing section based on actual work transmission line, consider each span and the suspension point discrepancy in elevation great disparity relatively
Greatly, and consider the influence of releasing pulley coefficient of friction, establish the mechanical model of tension force sag under stringing state, at each shaft tower
Overhead line stress various calculated by following：
T1=T0+wh0
F1=ε T1=ε (T0+wh0)
T2=ε F1+wh1=ε2(T0+wh0)+wh1 (2)
Te=Tn+whn=εn(T0+wh0)+εn-1wh1+…whn
H in formulan--- the n-th speed position overhead line suspension point discrepancy in elevation (m), when the hitch point of stringing side is higher, hnTake just, otherwise take
It is negative, take 0 when both sides suspension point etc. is high；
The linear mass of w --- overhead line, N/m；
The overall drag coefficient of ε --- overhead line and coaster, (1.012-1.015)；
N --- observation shelves to stringing end coaster quantity；
T0--- observation shelves Horizontal Tension, N；
Te--- stringing end pulling equipment tractive force, N；
Tn--- the tractive force of n-th speed position releasing pulley porch, N；
Fn--- the tractive force in n-th speed position releasing pulley exit, N；
If the discrepancy in elevation great disparity of each shelves is little, its average discrepancy in elevation is can use, therefore can be reduced to：
5), operating method：Observation shelves are determined according to stringing section is intended, arrangement stringing field, pass through formula (2) or formula
(3) tension value that stringing end device for measuring force corresponding to calculating observation shelves design sag should be shown, startup are twisted 1, observe dynamometry
Device, by formula (2) or formula (3), the tension value that pulling force sensor 2 is shown can pass through public affairs with control observation shelves Horizontal Tension
Formula (1), observation shelves Horizontal Tension can be with control observation shelves sag.
Application example：
There is a plan tension stringing section, observation span tension stringing section passes through 6 base shaft towers, and a releasing pulley, observation are hung per base shaft tower
Shelves design tension force is 15000N, wire suspension point discrepancy in elevation h0…h6It is 55m, 43m, 46m, 43m, 42m, 51m, the discrepancy in elevation respectivelyCoefficient of friction resistance ε=1.014 of the weight w=14.6N/m of conductor, wire and coaster, by formula
(2) tension value of stringing end manipulation is calculated：
Te=1.0146×(15000+14.6×55)+1.0145×14.6×43+1.0144×14.6×46+1.0143×
14.6×43+1.0142×14.6×42+1.0141× 14.6 × 51=20815.7N
The tension value of stringing end manipulation is calculated by formula (3)：
By example calculation, due to formula (2) calculate it is complex, if transmission line of electricity intends each shelves of stringing section
The discrepancy in elevation great disparity it is little when, directly can meet engineering demand with formula (3).
Claims (1)
- A kind of sag observation method 1. work transmission line is constructed, it is characterised in that：1), in overhead transmission line engineering, the relation of overhead transmission line sag and stress, tension force is embodied by following two formula：<mrow> <mi>f</mi> <mo>=</mo> <mfrac> <mrow> <msup> <mi>gl</mi> <mn>2</mn> </msup> </mrow> <mrow> <mn>8</mn> <mi>&sigma;</mi> </mrow> </mfrac> <mo>;</mo> <mi>f</mi> <mo>=</mo> <mfrac> <mrow> <msup> <mi>&gamma;l</mi> <mn>2</mn> </msup> </mrow> <mrow> <mn>8</mn> <mi>T</mi> </mrow> </mfrac> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>)</mo> </mrow> </mrow>Wherein：F is sag, and 1 is span, and g is leads, ground wire ratio carries, and σ is stress, and γ leads for unit length, the deadweight of ground wire, and T is Horizontal Tension, sag can be converted to by tension force according to formula；2), pulling force sensor (2) is linked into the circuit of overhead line stringing state, controlled by the change of its tension value tight Tension force in line process, and then control circuit sag；It can be seen from the relation of line length and sag, the change of small line length can draw The change of larger sag is played, therefore pulling force sensor (2) can be linked into the wire clamp of Construction of Tension Stringing and be twisted between steel cable；3) observation shelves (5), are selected according to plan stringing section, pulling force sensor (2) is linked into the wire clamp and strand of Construction of Tension Stringing Between grinding steel cable, establish by being twisted (1), pulling force sensor (2), being twisted the trailer system that steel cable and wire clamp form, by wire clamp Line (3) more than connection, startup are twisted (1), slowly tighten up and be twisted steel cable, and observation shelves are led, ground wire is slowly lifted by pulley (4), are seen Pulling force sensor (2) display data is surveyed, control sag reaches design load；4), intend the stringing operating mode of stringing section based on actual work transmission line, consider each span and the suspension point discrepancy in elevation great disparity relatively Greatly, and consider the influence of releasing pulley coefficient of friction, establish the mechanical model of tension force sag under stringing state, at each shaft tower Overhead line stress various calculated by following：<mrow> <mtable> <mtr> <mtd> <mrow> <msub> <mi>T</mi> <mn>1</mn> </msub> <mo>=</mo> <msub> <mi>T</mi> <mn>0</mn> </msub> <mo>+</mo> <msub> <mi>wh</mi> <mn>0</mn> </msub> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>F</mi> <mn>1</mn> </msub> <mo>=</mo> <msub> <mi>&epsiv;T</mi> <mn>1</mn> </msub> <mo>=</mo> <mi>&epsiv;</mi> <mrow> <mo>(</mo> <msub> <mi>T</mi> <mn>0</mn> </msub> <mo>+</mo> <msub> <mi>wh</mi> <mn>0</mn> </msub> <mo>)</mo> </mrow> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>T</mi> <mn>2</mn> </msub> <mo>=</mo> <msub> <mi>&epsiv;F</mi> <mn>1</mn> </msub> <mo>+</mo> <msub> <mi>wh</mi> <mn>1</mn> </msub> <mo>=</mo> <msup> <mi>&epsiv;</mi> <mn>2</mn> </msup> <mrow> <mo>(</mo> <msub> <mi>T</mi> <mn>0</mn> </msub> <mo>+</mo> <msub> <mi>wh</mi> <mn>0</mn> </msub> <mo>)</mo> </mrow> <mo>+</mo> <msub> <mi>wh</mi> <mn>1</mn> </msub> </mrow> </mtd> </mtr> <mtr> <mtd> <mo>.</mo> </mtd> </mtr> <mtr> <mtd> <mo>.</mo> </mtd> </mtr> <mtr> <mtd> <mo>.</mo> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>T</mi> <mi>e</mi> </msub> <mo>=</mo> <msub> <mi>T</mi> <mi>n</mi> </msub> <mo>+</mo> <msub> <mi>wh</mi> <mi>n</mi> </msub> <mo>=</mo> <msup> <mi>&epsiv;</mi> <mi>n</mi> </msup> <mrow> <mo>(</mo> <msub> <mi>T</mi> <mn>0</mn> </msub> <mo>+</mo> <msub> <mi>wh</mi> <mn>0</mn> </msub> <mo>)</mo> </mrow> <mo>+</mo> <msup> <mi>&epsiv;</mi> <mrow> <mi>n</mi> <mo>-</mo> <mn>1</mn> </mrow> </msup> <msub> <mi>wh</mi> <mn>1</mn> </msub> <mo>+</mo> <mn>...</mn> <msub> <mi>wh</mi> <mn>0</mn> </msub> </mrow> </mtd> </mtr> </mtable> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>2</mn> <mo>)</mo> </mrow> </mrow>H in formulan--- the n-th speed position overhead line suspension point discrepancy in elevation (m), when the hitch point of stringing side is higher, hnTake just, on the contrary take it is negative, when Both sides suspension point etc. takes 0 when high；The linear mass of w --- overhead line, N/m；The overall drag coefficient of ε --- overhead line and coaster, ε spans：1.012-1.015；N --- observation shelves to stringing end coaster quantity；T0--- observation shelves Horizontal Tension, N；Te--- stringing end pulling equipment tractive force, N；Tn--- the tractive force of n-th speed position releasing pulley porch, N；Fn--- the tractive force in n-th speed position releasing pulley exit, N；If the discrepancy in elevation great disparity of each shelves is little, its average discrepancy in elevation is can use, therefore can be reduced to：<mrow> <msub> <mi>T</mi> <mi>e</mi> </msub> <mo>=</mo> <msup> <mi>&epsiv;</mi> <mi>n</mi> </msup> <msub> <mi>T</mi> <mn>0</mn> </msub> <mo>+</mo> <mi>w</mi> <mfrac> <mrow> <munderover> <mo>&Sigma;</mo> <mrow> <mi>i</mi> <mo>=</mo> <mn>0</mn> </mrow> <mi>n</mi> </munderover> <msub> <mi>h</mi> <mi>i</mi> </msub> </mrow> <mi>n</mi> </mfrac> <mfrac> <mrow> <mi>&epsiv;</mi> <mrow> <mo>(</mo> <msup> <mi>&epsiv;</mi> <mi>n</mi> </msup> <mo>-</mo> <mn>1</mn> <mo>)</mo> </mrow> </mrow> <mrow> <mi>&epsiv;</mi> <mo>-</mo> <mn>1</mn> </mrow> </mfrac> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>3</mn> <mo>)</mo> </mrow> </mrow>5), according to stringing section determination observation shelves are intended, arrangement stringing field, observation shelves are calculated by formula (2) or formula (3) The tension value that stringing end device for measuring force corresponding to design sag should be shown, startup are twisted (1), device for measuring force are observed, by formula (2) Or formula (3), the tension value of pulling force sensor (2) display can pass through formula (1), observation with control observation shelves (5) Horizontal Tension Shelves (5) Horizontal Tension can be with control observation shelves sag；Due to formula (2) calculate get up it is complex, if transmission line of electricity intend each shelves of stringing section the discrepancy in elevation great disparity it is little, can be straight Engineering demand can be met with formula (3) by connecing.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105692484A (en) * | 2016-04-27 | 2016-06-22 | 湖南科技大学 | Portable winching machine tractive force telemetering device |
| CN107358020B (en) * | 2017-05-31 | 2020-08-11 | 国网江西省电力公司电力科学研究院 | Method for calculating line tightening length of distribution network wire with overlarge sag |
| CN108182305B (en) * | 2017-12-15 | 2021-06-18 | 河南送变电建设有限公司 | Accurate calculation method for tension paying-off dynamic simulation |
| CN108362207A (en) * | 2018-02-28 | 2018-08-03 | 成都信息工程大学 | A kind of sag of conductor and ground wire measuring device |
| CN109580067B (en) * | 2018-10-30 | 2021-07-20 | 国网湖北省电力有限公司中超建设管理公司 | High-voltage transmission line construction line tightening early warning method based on accurate positioning |
| CN109802332A (en) * | 2018-12-26 | 2019-05-24 | 安徽送变电工程有限公司 | A kind of method that grounded-line stringing controls sag of conductor and ground wire in the process |
| CN110906871B (en) * | 2019-11-29 | 2021-08-03 | 河南送变电建设有限公司 | Method for observing and adjusting lead through gear side sag |
| CN114112152B (en) * | 2020-08-27 | 2023-05-05 | 电力规划总院有限公司 | Overhead line stress variable temperature compensation method, device and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751667A (en) * | 2012-07-12 | 2012-10-24 | 绍兴电力局 | Extra-strong steel core soft aluminum lead arc sag control method |
| CN103236658A (en) * | 2012-05-18 | 2013-08-07 | 河南送变电工程公司 | Disconnection method and device for obtaining exact off-line length of conductor of overhead transmission line |
| CN103441450A (en) * | 2013-09-13 | 2013-12-11 | 国家电网公司 | Deicing method based on icing rolling on electric transmission line |
| CN103560437A (en) * | 2013-11-16 | 2014-02-05 | 国家电网公司 | Mounting method for optical cable tackle suspension and accessories thereof based on two single-wheel tackles |
-
2015
- 2015-07-09 CN CN201510399855.0A patent/CN104993424B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103236658A (en) * | 2012-05-18 | 2013-08-07 | 河南送变电工程公司 | Disconnection method and device for obtaining exact off-line length of conductor of overhead transmission line |
| CN102751667A (en) * | 2012-07-12 | 2012-10-24 | 绍兴电力局 | Extra-strong steel core soft aluminum lead arc sag control method |
| CN103441450A (en) * | 2013-09-13 | 2013-12-11 | 国家电网公司 | Deicing method based on icing rolling on electric transmission line |
| CN103560437A (en) * | 2013-11-16 | 2014-02-05 | 国家电网公司 | Mounting method for optical cable tackle suspension and accessories thereof based on two single-wheel tackles |
Non-Patent Citations (2)
| Title |
|---|
| 杆塔架线连续倾斜档施工计算方法的探讨;黄俊杰;《电力建设》;20060331;第43-45页 * |
| 超特高压架空输电线路张力放线施工技术应用研究;沈志;《中国优秀硕士学位论文全文数据库（电子期刊）工程科技II辑》;20120515;C042-549 * |
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