CN104166802B - A kind of continuous shelves transmission line of electricity ice-shedding method for determining height - Google Patents
A kind of continuous shelves transmission line of electricity ice-shedding method for determining height Download PDFInfo
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- CN104166802B CN104166802B CN201410407214.0A CN201410407214A CN104166802B CN 104166802 B CN104166802 B CN 104166802B CN 201410407214 A CN201410407214 A CN 201410407214A CN 104166802 B CN104166802 B CN 104166802B
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Abstract
The present invention relates to a kind of continuous shelves transmission line of electricity ice-shedding method for determining height, this method is applied to 800 kilovolts of aerial high-voltage power transmission lines；Methods described considers that sag is poor, deices grade span and the non-influence for deicing three factors of grade span to ice-shedding height；This method comprises the following steps：Measure the parameter of continuous shelves transmission line of electricity in scene；Ice-shedding height H ' is determined by modeling；To the ice-shedding height H ' linear fits；Determine ice-shedding height H.This method is by sag difference when continuous shelves span correction factor and icing and after deicing, and to calculate continuous shelves transmission line of electricity ice-shedding height, continuous shelves span correction factor, which mainly considers, to be deiced grade span and non-deice a grade span.The computational methods of the present invention are primarily directed to the computational methods of the continuous shelves transmission line of electricity ice-shedding height of 800KV, and the calculating to ice-shedding height under this operating mode has reference significance.
Description
Technical field：
The present invention relates to a kind of transmission line of electricity ice-shedding method for determining height, is more particularly to a kind of continuous shelves transmission of electricity
Circuit ice-shedding method for determining height.
Background technology
One of the common type of ice-shedding as icing disaster accident, significant damage can be caused to transmission line of electricity.Icing
Wire raises in temperature, or natural wind effect, or can be produced under artificial vibration percussion it is uneven deice or not the same period deice,
Cause wire ice-shedding.Deicing not only influences the later icing process again of wire, and cataclysm due to instantaneous pulling force and leads
The severe bounce of line, circuit can also be produced and endanger very big electrical or mechanical accident.Therefore, wire ice-shedding is carried out and counted
Point counting is analysed, and the reliability and economy of right ± 800kV same tower double back transmission line safe operations, there is important realistic meaning.
The wire ice-shedding of continuous shelves, difference is deiced with isolated shelves wire：Because suspension insulator on tangent tower can
So that longitudinal oscillation occurs, thus the power coupling between adjacent shelves be present.Specifically, one grade of wire deices in continuous shelves
When, the wire tension for deicing shelves reduces, and deices between shelves and adjacent shelves and unbalanced tensile force occurs, in the effect of this unbalanced tensile force
Under, the suspension insulator of hitch point is swung to the adjacent grade direction that do not deice.The vertical misalignment of hitch point insulator chain produces
Both sides effect：On the one hand deice shelves equivalent span increase, it is adjacent do not deice shelves equivalent span reduce, deice shelves etc.
Span increase is imitated, then in the case where line length is constant, its static sag reduces；Another aspect hitch point produces vertical displacement.Two
The effect of aspect can all increase the jump height of wire.From the point of view of energy point of view, the adjacent equivalent span of shelves that do not deice reduces, thus
Then gravitional force reduces the increase of wire sag, and tension force reduces then elastic potential energy and reduced, the pendulum that the part potential energy passes through insulator chain
It is dynamic, the wire for deicing shelves is done work, increases the wire jump height for deicing shelves.
The calculation formula of overhead line ice-shedding height, this poor factor of sag is only considered to ice-shedding height
Influence, do not account for deicing shelves and the non-influence for deicing grade span to ice-shedding height.Therefore propose a kind of continuous shelves power transmission line
Road ice-shedding method for determining height is to overcome above mentioned problem.
The content of the invention：
It is an object of the invention to provide a kind of continuous shelves transmission line of electricity ice-shedding method for determining height, this method considers
Sag is poor, deices grade span and the non-influence for deicing grade span these three factors to ice-shedding height, is the continuous shelves of 800KV
The calculating of transmission line of electricity ice-shedding height provides reference.
To achieve the above object, the present invention uses following technical scheme：A kind of continuous shelves transmission line of electricity ice-shedding height
Determination method, this method is applied to 800 kilovolts of aerial high-voltage power transmission lines；Methods described considers that sag is poor, deices shelves shelves
Away from the non-influence for deicing three factors of grade span to ice-shedding height；This method comprises the following steps：
(1) parameter of continuous shelves transmission line of electricity is measured at scene；
(2) ice-shedding height H ' is determined by modeling；
(3) to the ice-shedding height H ' linear fits；
(4) ice-shedding height H is determined.
A kind of continuous shelves transmission line of electricity ice-shedding method for determining height provided by the invention, the step (1) is middle to join
Number includes deicing a grade span L1, non-deice a grade span L2, wire non-icing when sag F1With sag F after wire icing2。
A kind of continuous shelves transmission line of electricity ice-shedding method for determining height provided by the invention, the step (2) pass through
Finite element software is modeled according to the parameter in the step (1).
Another preferable a kind of continuous shelves transmission line of electricity ice-shedding method for determining height provided by the invention, passes through institute
The linear fit stated in step (3) determines parameter A, B and C, finally determines the ice-shedding height H in the step (4).
Another preferable a kind of continuous shelves transmission line of electricity ice-shedding method for determining height provided by the invention, the step
Suddenly the ice-shedding height H determination process in (4) is：
By determining span adjusted coefficient K；
Determine sag difference Δ f；
Determine ice-shedding height H.
Another preferable a kind of continuous shelves transmission line of electricity ice-shedding method for determining height provided by the invention, the step
Suddenly the span adjusted coefficient K in (4) is determined by following formula：
K=B+C (L1-L2)
Wherein, B and C is parameter.
Another preferable a kind of continuous shelves transmission line of electricity ice-shedding method for determining height provided by the invention, the step
Suddenly sag F when the sag difference Δ f in (4) is the wire non-icing1With sag F after wire icing2Difference, i.e.,：
Δ f=F1-F2
Another preferable a kind of continuous shelves transmission line of electricity ice-shedding method for determining height provided by the invention, the step
Suddenly the ice-shedding height H in (4) is determined by following formula：
H=A*K* Δs f
Wherein, A is parameter.
Another preferable a kind of continuous shelves transmission line of electricity ice-shedding method for determining height provided by the invention, the ginseng
Number A is determined by following formula linear fit H '：
H '=A* Δs f
Wherein, parameter A is the slope in the linear fit H '；Sag F when Δ f is the wire non-icing1With wire
Sag F after icing2Difference；
The parameter B and C carries out quadratic fit determination according to the difference to fitting result H ' and L1 and L2：In the secondary plan
Span adjusted coefficient K is introduced in conjunction；The span adjusted coefficient K is the linear fit H ' result of calculations and simulation result
Ratio.
Another preferable a kind of continuous shelves transmission line of electricity ice-shedding method for determining height provided by the invention, it is described to build
Mold process is：
Form finding analysis during the non-icing of wire；
Determine conductor structure in dead load, Transient optical signal and simple harmonic quantity using nonlinear finite element transient dynamic analysis algorithm
The displacement changed over time being optionally combined under effect of load, strain, stress；
The form finding analysis process is：The ruling span for being first according to power transmission line section determines wire tension, according to
Power-sag theory establishes the parabola geometrical model of wire, then by updating the geometry of wire repeatedly, carries out non-thread
Property Static Calculation, until wire maximum displacement vector is zero, then without solve again, look for shape to terminate.
With immediate prior art ratio, the present invention, which provides technical scheme, has following excellent effect
1st, the present invention consider sag is poor, deice grade span and it is non-deice these three factors of grade span to ice-shedding height
Influence, the calculating for the continuous shelves transmission line of electricity ice-shedding height of 800KV provides reference；
2nd, the inventive method can be used for the quick calculating of ice-shedding height and prediction of ice formation transmission line of electricity；
3rd, the present invention can make the quick hand computation of first-line staff go out dangerous section and carry out local ice-melt for dangerous location
Or other measures, so as to reduce the massive blackout because caused by ice-shedding causes wire short circuit；
4th, much local instant invention overcomes China, the development of ice condition may be more complicated so that simulation analysis can be relatively more tired
The problem of difficult；
5th, the present invention has important realistic meaning to transmission line safety reliability of operation and economy.
Brief description of the drawings
Fig. 1 is the initial icing figure of wire of the present invention；
Fig. 2 is that wire of the present invention deices figure；
Fig. 3 is flow chart of the method for the present invention.
Embodiment
With reference to embodiment, the invention will be described in further detail.
Embodiment 1：
As Figure 1-3, the continuous shelves transmission line of electricity ice-shedding method for determining height of the invention of this example, this method are applicable
In 800 kilovolts of aerial high-voltage power transmission lines；Methods described consider sag is poor, deice grade span and it is non-deice grade span three because
Influence of the element to ice-shedding height；This method comprises the following steps：
(1) parameter of continuous shelves transmission line of electricity is measured at scene；
(2) ice-shedding height H ' is determined by modeling；
(3) to the ice-shedding height H ' linear fits；
(4) ice-shedding height H is determined.
Parameter includes deicing a grade span L in the step (1)1, non-deice a grade span L2, wire non-icing when sag F1With
Sag F after wire icing2。
The step (2) is modeled by finite element software according to the parameter in the step (1).
Parameter A, B and C are determined by the linear fit in the step (3), finally determine deicing in the step (4)
Jump height H.
Ice-shedding height H determination process in the step (4) is：
By determining span adjusted coefficient K；
Determine sag difference Δ f；
Determine ice-shedding height H.
Span adjusted coefficient K in the step (4) is determined by following formula：
K=B+C (L1-L2)
Wherein, B and C is parameter
Sag F during sag difference Δ f in the step (4) non-for wire icing1With sag F after wire icing2's
Difference, i.e.,：
Δ f=F1-F2
Ice-shedding height H in the step (4) is determined by following formula：
H=A*K* Δs f
Wherein, A is parameter.
The parameter A is determined by following formula MATLAB linear fits H '：
H '=A* Δs f
Wherein, parameter A is the slope in the linear fit H '；Sag covers with wire when Δ f is the wire non-icing
The difference of sag after ice；
The parameter B and C carries out quadratic fit determination according to the difference to fitting result H ' and L1 and L2：In the secondary plan
Span adjusted coefficient K is introduced in conjunction；The span adjusted coefficient K is the linear fit H ' result of calculations and simulation result
Ratio.
The modeling determines that its process is according to Ansys finite element softwares：
Form finding analysis during the non-icing of wire；
Determine conductor structure in dead load, Transient optical signal and simple harmonic quantity using nonlinear finite element transient dynamic analysis algorithm
The displacement changed over time being optionally combined under effect of load, strain, stress；
The form finding analysis process is：The ruling span for being first according to power transmission line section determines wire tension, according to
Power-sag theory establishes the parabola geometrical model of wire, then by updating the geometry of wire repeatedly, carries out non-thread
Property Static Calculation, until wire maximum displacement vector is zero, then without solve again, look for shape to terminate.
It is non-linear that finite element program ANSYS can simulate ground wire cell geometry, considers ground wire pretension to tower linear system
The influence for dynamic characteristics of uniting, by transient analysis, obtain the dynamic response of tower linear system system.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, institute
The those of ordinary skill in category field with reference to above-described embodiment although should be understood：Still can be to the embodiment of the present invention
Modify or equivalent substitution, these are without departing from any modification of spirit and scope of the invention or equivalent substitution, in Shen
Within claims of the invention that please be pending.
Claims (1)
1. a kind of continuous shelves transmission line of electricity ice-shedding method for determining height, it is defeated that this method is applied to 800 kilovolts of aerial high-voltages
Electric line；It is characterized in that：Methods described considers that sag is poor, deice grade span and non-three factors of grade span that deice are to deicing
The influence of jump height；This method comprises the following steps：
(1) parameter of continuous shelves transmission line of electricity is measured at scene；
(2) ice-shedding height H ' is determined by modeling；
(3) to the ice-shedding height H ' linear fits；
(4) ice-shedding height H is determined；
Parameter includes deicing a grade span L in the step (1)1, non-deice a grade span L2, wire non-icing when sag F1And wire
Sag F after icing2；
The step (2) is modeled by finite element software according to the parameter in the step (1)；
The modeling process is：
Form finding analysis during the non-icing of wire；
Determine conductor structure in dead load, Transient optical signal and Simple Harmonic Load using nonlinear finite element transient dynamic analysis algorithm
Be optionally combined effect under the displacement changed over time, strain, stress；
The form finding analysis process is：The ruling span for being first according to power transmission line section determines wire tension, according to tension force-arc
Vertical theory establishes the parabola geometrical model of wire, then by updating the geometry of wire repeatedly, carries out nonlinear static
Calculate, until wire maximum displacement vector is zero, then without solve again, look for shape to terminate；
Parameter A, B and C are determined by the linear fit in the step (3), parameter A is the slope in the linear fit H ',
Finally determine the ice-shedding height H in the step (4)；
Ice-shedding height H determination process in the step (4) is：
By determining span adjusted coefficient K；
Determine sag difference Δ f；
Determine ice-shedding height H；
Span adjusted coefficient K in the step (4) is determined by following formula：
K=B+C (L1-L2)
Wherein, B and C is parameter；
Sag F during sag difference Δ f in the step (4) non-for wire icing1With sag F after wire icing2Difference, i.e.,：
Δ f=F1-F2
Ice-shedding height H in the step (4) is determined by following formula：
H=A*K* Δs f
Wherein, A is parameter；
The parameter A is determined by following formula linear fit H '：
H '=A* Δs f
Wherein, parameter A is the slope in the linear fit H '；Sag F when Δ f is the wire non-icing1After wire icing
Sag F2Difference；
The parameter B and C carries out quadratic fit determination according to the difference to fitting result H ' and L1 and L2：In the quadratic fit
Introduce span adjusted coefficient K；The span adjusted coefficient K is the ratio of the linear fit H ' result of calculations and simulation result
Value.
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Families Citing this family (5)
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| CN105426597B (en) * | 2015-11-09 | 2019-08-16 | 中国电力科学研究院 | A kind of overhead transmission line large-section lead looks for shape to determine method |
| CN108917617A (en) * | 2018-09-19 | 2018-11-30 | 贵州电网有限责任公司 | A method of for ice-melt operation field transmission line of electricity ice-shedding vision measurement |
| CN109858117B (en) * | 2019-01-21 | 2022-09-13 | 重庆科技学院 | Algorithm for maximum jumping height of single-span icing transmission line during deicing |
| CN111241687B (en) * | 2020-01-15 | 2022-06-03 | 中国电建集团福建省电力勘测设计院有限公司 | Concentrated load continuous gear stress sag design method based on geometric proportion virtual method |
| CN112231922B (en) * | 2020-10-23 | 2023-07-07 | 云南恒安电力工程有限公司 | Method for preventing and controlling ice disaster of power transmission line by wire deicing jump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102663215A (en) * | 2012-05-14 | 2012-09-12 | 重庆大学 | Method for evaluating ice resistance of tower-wire coupled system of overhead transmission line |
| EP2664545A1 (en) * | 2012-05-16 | 2013-11-20 | Eurocopter | Device for supplying electric power to at least one device of an aircraft rotor and aircraft |
| CN103913221A (en) * | 2014-04-09 | 2014-07-09 | 清华大学深圳研究生院 | Method for measuring deicing jump damping coefficients of iced power transmission line |
| CN103942417A (en) * | 2014-04-01 | 2014-07-23 | 清华大学深圳研究生院 | Ice covered wire deicing jumping simulation testing method |
-
2014
- 2014-08-18 CN CN201410407214.0A patent/CN104166802B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102663215A (en) * | 2012-05-14 | 2012-09-12 | 重庆大学 | Method for evaluating ice resistance of tower-wire coupled system of overhead transmission line |
| EP2664545A1 (en) * | 2012-05-16 | 2013-11-20 | Eurocopter | Device for supplying electric power to at least one device of an aircraft rotor and aircraft |
| CN103942417A (en) * | 2014-04-01 | 2014-07-23 | 清华大学深圳研究生院 | Ice covered wire deicing jumping simulation testing method |
| CN103913221A (en) * | 2014-04-09 | 2014-07-09 | 清华大学深圳研究生院 | Method for measuring deicing jump damping coefficients of iced power transmission line |
Non-Patent Citations (1)
| Title |
|---|
| 覆冰输电线路脱冰动力响应及机械式除冰方法研究;陈科全;《万方数据企业知识服务平台》;20130523;第3章至第4章 * |
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