CN108493882A - A kind of research method of Galloping of Overhead Transmission Line mechanism - Google Patents
A kind of research method of Galloping of Overhead Transmission Line mechanism Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/14—Arrangements or devices for damping mechanical oscillations of lines, e.g. for reducing production of sound
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Abstract
The invention relates to a kind of research methods of Galloping of Overhead Transmission Line mechanism, by the stagnant row equation of acting science experiment and operation equation, obtain the stagnant row equation at any point and operation equation on transmission pressure：X in formula1tIndicate the displacement loss total amount generated under viscous motion effect control by position, v10Indicate that initial stagnant row velocity of displacement, t indicate that conductor galloping time, F indicate active force；x2tIndicate unbalance displacement, v20Indicate initial imbalance velocity of displacement；On transmission pressure arbitrarily by position with constraint point the distance between be r1, on transmission pressure by the distance between position and maximum flexibility point be arbitrarily r2, the distance between constraint point maximum flexibility point is r.What the present invention can more comprehensively study transmission pressure waves mechanism, and the method for avoiding Galloping of Overhead Transmission Line is found so as to more science.
Description
Technical field
The present invention relates to power transmission engineering fields, more particularly to a kind of research method of Galloping of Overhead Transmission Line mechanism.
Background technology
Galloping of Overhead Transmission Line prevention problem is the difficult scientific problems of domestic and international power transmission engineering technical field of research common concern.It is defeated
Electric lead is waved can bring huge disaster to the mankind, so, Galloping of Overhead Transmission Line mechanism and its disaster are all paid much attention to both at home and abroad
Study on prevention.
About the research of Galloping of Overhead Transmission Line, the U.S., Canada, the Soviet Union, Britain, Japan and other countries started from for 20th century 30 years
Generation, China start from the 1950s.In order to avoid the generation for the accident of waving, the academia of countries in the world and power engineering circle are all
Huge manpower and financial resources have been put into, numerous studies have been carried out to brandishing and anti-dance measure project.From the point of view of general survey, both at home and abroad
About these researchs of Galloping of Overhead Transmission Line, although subjective purpose is to make clear to wave mechanism, so that can take
Rational anti-dance measure, but some perception based on incomplete basic theory, can only be objectively being carried out to brandishing
Research, a large amount of research all cannot really cut mechanism, although people carried out observation, experiment, modeling, mathematic calculation,
The numerous studies of Computer Simulation etc. etc. cannot but provide the theory waved with quantitative relationship between its governing factor always
With equation.But, in terms of anti-dance measure, research both domestic and external has all achieved fruitful achievement really.
It is the vertical excitation of U.S. Den Hartog respectively currently, in the world there are two types of the theory for waving mechanism is explained
Mechanism theory and the torsion excitation mechanism of Canada O.Nigol are theoretical.Both theories are mainly based upon traditional mechanics thought side
Method waves rule to study, and the common defects of the two both are from mechanical deficiencies, and theoretical foundation is incomplete.The defect of mechanics
It is not provide the correct theory of relationship schedule between unified research variation and its governing factor, is unable to unified metric and waves item
Part is unable to right metric and calculates transmission pressure stability and wave character state.Either it is conceived to vertical excitation, still
It is conceived to torsion excitation, is not to be conceived to wave and be related to this core and entirety between its governing factor, is all piece
Face is treated waves problem with research, and method has deviation.
Acting science experiment is the emerging science generated the 1980s.Acting science experiment generates the moon ancient in mechanics and China
On the basis of positive theory.Mechanics uses quantitative function technique study and solves the problems, such as, this is one of the important science that it has, and is
What Chinese yin-yang theory did not had.But mechanics excessively emphasizes the effect and mechanics law of power, has desalinated objective, entirety, system
One, the scientific idea of full appreciation problem, as a result,：On the one hand, people is made always to seek first in practical problem research
The law solved the problems, such as, rather than the objective law of complete observation problem of perception first, so that can be sought according to objective reality
Ask solution to the problem and scheme；On the other hand, people always seek the relationship between power and variation in Study on Problems, and
Without correctly acting on concept and effect and changing unified concept.Compared with mechanics, the ancient yin-yang theory of China can draw
Lead people and treat problem comprehensively, and people can be instructed to carry out problem of perception in terms of positive and negative two, this be yin-yang theory science it
Place.But yin-yang theory cannot use quantitative function technique study solving practical problems, the Eight Diagrams generated in its theoretical foundation
Art applicability is poor.Therefore, mechanics and yin-yang theory are not perfect science.
The variation concept of acting science experiment includes motion change, relationship change, deformation, fluctuation, vibration, flowing, seepage flow movement, changes
All variation phenomenons of variation, fusion, fission, biological growth etc..Acting science experiment thinks that most basic variation is limited by effect,
Complicated variation such as relationship change is moved, acted on and is changed substantially co- controlling.Therefore, acting science experiment establishes one and uniformly retouches
The equation group for stating organic growth evolution basic law, is called with law of unity of opposites equation group, and mathematic(al) representation is
For simplicity of exposition, Basic equation group is learned in hereinafter referred to as effect.
Invention content
The present invention provides a kind of research method of Galloping of Overhead Transmission Line mechanism so that it can which more comprehensive research transmission of electricity is led
Line waves mechanism, and the method for avoiding Galloping of Overhead Transmission Line is found so as to more science.
According to acting science experiment Basic equation group, for Galloping of Overhead Transmission Line problem, the equation A=A in equation groupT+AFDescription
Control the actuating quantity part A that the outer actuating quantity A that brandishing occurs stablizes with wherein pilotTWith the work of pilot unstability
Dosage part AFBetween unity of opposites relationship schedule, equation AF=EA describes the system between conducting wire unstability and effect, instability condition
One relationship schedule, equation AT=TA describes conducting wire stabilization and the unified relationship rule between control action, stable condition, equation E+
T=1 describes unstable degree and waves characteristic value and degree of stability not wave unity of opposites relationship schedule between characteristic value,
Virtuality E waves characteristic for measuring unstability, and solidity T is directly used in measurement and stablizes, do not wave characteristic, also, conducting wire is flat in control
The stable active force control of weighing apparatus lower operation equation, that is, viscous motion equation and the equation A in equation group generating, maintaining balanceT=TA
Between there are following relationships：
In formula, x1tIndicate the distance that the active force of control balance prevents conductor galloping from running, i.e. displacement loss amount；Conducting wire
Wave operation equation and equation AFThere are following relationship schedules between=EA：
In formula, x2tIndicate the curve distance of conductor galloping operation, i.e., unbalance displacement.Therefore, equation group directly can be used for
Galloping of Overhead Transmission Line mechanism study.
According to mechanics and acting science experiment, for the actual conditions of transmission pressure, it is first determined its various actuating quantitys received, void
Actuating quantity and implementation dosage.Wherein, the actuating quantity that such as empty frame high-voltage line of transmission pressure receives is by gravity G, the active force of big air-flow
That is wind-force P, the gravity Δ G of the gravity of additional gravity such as icing or attached water, additional wind-force Δ P are generated jointly.In addition, line bar or tower
Frame generates bearing to conducting wire and stretches constraint effect.The gravity of conducting wire, which is equal to, waves or swings OQ section leads in section lead i.e. Fig. 1
The product of the quality m and gravity acceleration g of section, i.e. G=mg.Wind-force is
On the basis of this formula is the relational expression between the active force and flow that hydrodynamics generates section about fluid
It derives, relationship of the description fluid between the volume of the object activation force generated and flow, object.In formula, λ tables
Show the material density of big air-flow；Q indicates the big air flow rate run by conducting wire；S is indicated when big air-flow vertical wires are moved towards pair
The maximum cross-section area of conducting wire effect；L indicates conductor length；D indicates cross-section of a wire diameter；K indicates that acted body is acted on
Average distance, i.e., the average length of object on action direction.
The additional gravity that icing or attached water or attached dirt generate is equal to the substances such as ice, water or the dust being attached on OQ section leads
The gravity that receives of quality Δ m, i.e.,
Δ G=Δs mg.
Additional wind-force Δ P generates the effect of additional mass Δ m by wind.If the contact surface area of additional mass and wind is Δ
S, the average distance that additional mass section extends are Δ k, then, the blowing force that wind generates the conducting wire with added substance is
Line bar or pylon generate supporting force to conducting wire, as shown in Fig. 2, respectively N1And N2.Line bar or pylon generate conducting wire
Drawing force be respectively f1And f2.These active force co- controllings the vibration of each particle on conducting wire, that is, wave or swing.This
A little power are to the active force of arbitrary point M on conducting wire as shown in figure 3, its functional expression is
Joint force F=(G+ Δ G)+(f1+f2)+(N1+N2)+(P+ΔP)。
As shown in figure 4, if the angle between the traffic direction and solid axes x, y, z of big air-flow, that is, wind be respectively α,
β, γ, then, projection components of the wind-force on solid axes are respectively
According to acting science experiment, there are two types of most basic equations by any point M on conducting wire, are stagnant row equation and operation equation respectively.
According to effect theory, stagnant row equation refers to the relation equation maintained between by the static effect of position and its governing factor,
Its equation is AT=TA, by A=Ft, obtaining its kinematics form is
The displacement loss total amount x that equation description is generated by position under viscous motion effect control1tWith effect and made
With the quantitative relationship rule between the equilibrium property parameter T of point, the v in formula10Indicate that initial stagnant row velocity of displacement, t indicate conducting wire
Wave the time；Operation equation refers to the quantitative relationship equation between by position unbalance amount and its governing factor, equation AF
=EA, kinematics form are
The equation is for describing unbalance displacement x2tDetermine with its control action and between by the unbalance nature parameters of position
Magnitude relation rule, the v in formula20Indicate initial imbalance velocity of displacement.
It can be seen that put on conducting wire according to stagnant row equation and operation equation and whether wave or swing, on the one hand depend on driving
Action is used, and on the other hand depends on waving condition.Wherein, condition is waved by parameter T and E to describe.In waving research, parameter
T and E, which is respectively used to can not waving for arbitrary point on statement conducting wire, degree and can wave degree.According to acting science experiment, journey can not be waved
It degree and degree can be waved mainly is determined by the position for waving a little.
As shown in fig. 5, it is assumed that arbitrarily by position M and the distance between constraint point O, maximum flexibility point B on conducting wire
Respectively r1And r2, and the distance between point O, B are r, then, the degree of waving of any point is
Can not the degree of waving be
It willWithStagnant row equation and operation equation, and Simultaneous Equations are substituted into respectively, then are had
A conclusion can be obtained according to the above analysis：The unstability put on transmission pressure waves degree E values and proportionality coefficient
It is directly proportional；The balance put on transmission pressure
Degree of stability does not wave degree T values and proportionality coefficientIt is inversely proportional.
It is learnt by the transfer study result that position is acted on and is changed about on rod-like articles according to acting science experiment：It acts on
The active force at any point is transmitted to another arbitrary point on shaft on shaft, and the size and Orientation of active force is not
Change, but on shaft each point alterable property it is different, you can variation degree with can not variation degree not
Together, it is different that amplitude, velocity and acceleration be can change.Transmission of the lower each active force of surface analysis on dry shape object is advised with variation
Rule.
As shown in fig. 6, each active force acted on shaft at point O, M, Q is transmitted at the B of arbitrary point, they big
Small and direction does not change, that is,
But if assuming, conducting wire is homogeneous, and each section of line density is ρ, and M points are that amplitude maximum is waved on conducting wire
Point, then, the wind-force P that unit wire quality receives at M points on conducting wire makes the acceleration of waving that unit conducting wire generates at M points be
And on conducting wire at M points unit wire quality receive wind-force P be transmitted at B become P ' after make unit conducting wire at B points
Generate acceleration of waving be
In formula, EMAnd EBBe illustrated respectively in point M and point B under the control for the driving force P that unit wire quality ρ at M receives can
Wave property.Because M points are to wave amplitude maximum point on conducting wire, EMRepresent it is maximum wave a little wave degree, it
The factors such as value and null section lead length, the elastoplasticity of conducting wire itself, intensity, quality have relationship.According to this functional expression
Can further provide put on conducting wire wave rule：Point waves acceleration and proportionality coefficient on conducting wireIt is directly proportional, with wind pair
The action intensity of conducting wire is directly proportional, directly proportional to the long l of conducting wire span, with maximum wave a little wave property coefficient EMIt is worth into just
Than being inversely proportional with wire density.
The foundation of the above analysis method is acting science experiment basic theories, but the method for being changed power in transmission according to mechanics
It can apply, this will be further illustrated later by example.
Empty frame transmission pressure generally has flexible deformation and permanent deformation properties.So even if wire tensioning is stretched, it
As deforming and being waved under gentle breeze effect.The property of measurement conducting wire deformation is also virtuality, is also denoted as E.Conducting wire becomes
Shape and effect between universal relation equation be
In formula, x indicates the deformation displacement of conducting wire；E measures the deformable nature of conducting wire, is meant that degree of deformability；F tables
Show the active role power of pilot deformation；ρ indicates the line density of conducting wire.
As shown in Figure 10, conducting wire is deformed because of being acted on, and generates sag bent phenomenon.It will be apparent that displacement maximum value
For vectorThe deformation vector value of other points is all between 0~xmaxBetween.Deformation invariably with effect and changing environment
Nature parameters are corresponding.So, there is what kind of relationship on earth with its control action and qualitative change in the deformation put on conducting wire
RuleForce analysis can be carried out according to mechanics, but correct deformation analysis cannot be made.
It can be with basic understandings conducting wire by following several active forces according to mechanics：Transmission pressure be wind-force P, gravity G with
And supporting force N1And N2, pulling force f1And f2Co- controlling under deform, but it is how to cause to deform not know these power actually
's.According to effect theory, as shown in figure 4, each point all receives wind-force P, gravity G, supporting force N on OQ section leads1And N2, pulling force
f1And f2Equivalent effect, still, these active forces are divided into two types：Drive the active force and prevent conducting wire that conducting wire deforms
Be deformed by power.
Active force：There is the active force for driving drawing property to be referred to as active force deformation or variation phenomenon.Wind-force P and gravity G are
It is the active force for causing conducting wire to deform；Between O points and M points in Fig. 10, pulling force f2It is seen as active force；In Fig. 10
Between M points and Q points, pulling force f1It is seen as active force.The active force resultant that i.e. pilot is deformed displacement is
F=P+G+f2Or F=P+G+f1。
By power：It only generates the power of passive restriction effect to deforming or changing and is referred to as by power.O in Fig. 10
Between point and M points, supporting force N1And N2, pulling force f1It is seen as by power；Between O points and M points in Fig. 10, supporting force N1
And N2And f2It is seen as by power.
During research deformation or other variation phenomenons, it is normally not present in functional expression by power, they constitute control
Among the restraining factors of system deformation or variation phenomenon, it is comprised among virtuality or solidity parameter.According to acting science experiment about effect
Transmission on conducting wire and synthesising law, the active role power that constraint section lead integrally receives and the master that various pieces receive thereon
Dynamic deformation from motion is all F.
Relation equation on conducting wire between the deformation displacement of arbitrary point B and various governing factors is
In formula, x indicates the deformation displacement of B points on conducting wire；EBIndicate the degree of deformability of B points；EMIndicate the deformable of M points
Degree measures the deformation properties of maximum distortion displacement point；G ', P ' and f2' indicate that unit mass conducting wire connects at B points on conducting wire respectively
The three active role power received；G, P and f2Indicate that the conducting line segment between two constraint points O and Q integrally receives three actives respectively
Power (gravity, wind power and pulling force)；B and b ' indicates the length of two line segment of OB and BM respectively；As shown in Figure 10.
The relational expression between arbitrary point deformation displacement acceleration and various factors can be obtained by second differential
As it can be seen that the denaturation rule of transmission pressure with to wave rule essentially identical.The deflection for eliminating transmission pressure, so as to
It is more advantageous to and eliminates aeolian vibration phenomenon, it is necessary to increase the ability that conducting wire resists flexible deformation and permanent deformation, as far as possible really
It protects the empty skyborne conducting wire of frame and does not generate any deflection.In short, Deformation Prevention is also transmission pressure aeolian vibration study on prevention
In important topic.
It can be determined by acting science experiment analysis briefly above：Control Galloping of Overhead Transmission Line acts on and waves ring because being known as
The property factor in border, including matter void relation property and rule.Wherein, it is wind action to control the key effect factor waved.Cause
This, the mechanism of waving of transmission pressure is Galloping of Overhead Transmission Line variation and the pass between its control action and the property for waving environment
It is rule.
Currently, not being both at home and abroad very perfect to the measure of Galloping of Overhead Transmission Line prevention, can only accomplish to a certain extent
Inhibit and weaken conductor galloping, is waved it is difficult to thoroughly eliminate.Currently, the measure that people administer Galloping of Overhead Transmission Line is set in planning
Meter, construction, construction and safeguard in overall process, keep away, resist, the links such as anti-carry out comprehensive treatment, carry out overall process dance
Dynamic to administer, basic measures are as follows：
First, checked the line facility waved comprehensively, the influence caused by line facility is waved in analysis assessment.It is right
Wave that amplitude is big, the line hardware of duration length and insulator are sampled experiment, to tired damaged element in conjunction with have a power failure into
Row is replaced.It is administered second is that carrying out Anti-galloping to line oscillation section, at least one circuit of multiple-circuit on same tower takes anti-dance measure,
Important interconnection is preferentially administered, other not wave the factors such as section Combining with terrain, landforms, line alignment, tower structure, carries out dance
Dynamic probability analysis, is administered when necessary, it is ensured that in the case where occurrence of large-area is waved, each voltage class circuit, especially
It is the safe and stable operation of the circuits such as core backbone frame, strategic passway for transmitting electricity, important load supply line.Third, to circuit
It installs the anti-dancing device such as cable clip rotary type conductor spacer, inter-phase spacer, two parallel wielded-proof device additional and carries out anti-dance technological transformation.Fourth, waving
Dynamic area's installation is necessary to wave monitoring device, is monitored in real time to transmission line galloping.Distributed small-sized weather station is built, it is right
Weather information carries out monitoring and early warning.Technological means is provided for scheduling and emergency disposal, data supporting is provided to wave improvement.
A kind of current anti-dance technology that effect is relatively good existing at home and abroad, is ballast anti-dance technology.Although this skill
Art has received certain effect in practical problem, but since this technical method is next simply by the method for increasing quality and inertia
It realizes to reduce and waves amplitude, the governing factor waved is eliminated without the basic mechanism according to waving, bottom elimination cannot be cut and waved
Phenomenon.
According to acting science experiment, two kinds of factors of property that the factor waved only acted on and waved environment are controlled.Influencing factor is such as
Wind action comes from naturally, being indelible, still, conducting wire is waved property and can be changed.According to acting science experiment, lead
Line is waved property and can be changed by following measure：
1. according to equationIn can not wave functionWith can wave letter
NumberWork as r1When=r, r2=0, the nature and characteristic value that can not wave of conducting wire reaches minimum value i.e. T=0；Property spy can be waved
Value indicative reaches maximum value i.e. E=1；Work as r1When=0, r2The nature and characteristic value that can not wave of=r, conducting wire reach maximum value i.e. T=1；
Nature and characteristic value can be waved and reach minimum value i.e. E=0.
It prevents from waving, it can be by reducing on conducting wire arbitrarily by the distance between position and constraint position r1Method
To realize.Reduce r1Value actually requires to make arbitrarily all to be bound in by position on the position that can not be waved.Also
It is to say, if each point of transmission pressure is all bound on the motionless bridge one kind rigid objects of wind, it will be in wind
Under the action of keep not waving state.
2. according to equationWith conductor galloping basic law：On conducting wire point wave acceleration with than
Example coefficientIt is directly proportional, it is directly proportional to the action intensity of conducting wire to wind, it is directly proportional to the long l of conducting wire span, it is waved a little with maximum
Property coefficient E can be wavedMIt is worth directly proportional, is inversely proportional with wire density.It is contemplated that by tensing transmission pressure, keeping conducting wire always
Linear state, increase can not wave nature parameters T values, reduction can wave nature parameters EBValue and EMValue, increase wire density etc.
Method eliminates the target of conductor galloping to realize.This method requires the intensity height of conducting wire, the constraint intensity of constraint point big.
3. using by design, install it is rigid, do not fear oscillatory transmission line of electricity system and break away from brandishing to realize
Measure.
Nature parameters T values can not be waved, reduces and can wave in short, the key measure of Galloping of Overhead Transmission Line prevention is to increase
Nature parameters E values.
Description of the drawings
The above is merely an overview of the technical solutions of the present invention, in order to better understand the technical means of the present invention, below
In conjunction with attached drawing, the present invention is described in further detail with specific implementation mode.
Fig. 1 is transmission pressure schematic diagram.
Fig. 2 is the effect schematic diagram one that transmission pressure is subject to.
Fig. 3 is the effect schematic diagram two that transmission pressure is subject to.
Fig. 4 is the analysis chart of wind-force.
Fig. 5 is the movable property and its location diagram arbitrarily by position M.
Fig. 6 is rod-like articles by function analysis schematic diagram.
Fig. 7 is the effect schematic diagram three that transmission pressure is subject to.
Fig. 8 is the effect schematic diagram four that transmission pressure is subject to.
Fig. 9 is the effect schematic diagram five that transmission pressure is subject to.
Figure 10 is the effect schematic diagram six that transmission pressure is subject to.
Specific implementation mode
Example 1：
As shown in fig. 6, transmission pressure is crossed between 2 points of O, P, the transmission pressure is analyzed in spanning length l, examination
Wave property and effective anti-dance measure.
According to acting science experiment, active force, which transmits, abides by specific acting science experiment rule.As shown in fig. 7, acting on arbitrary on conducting wire
The joint force of point M comes from O points, the synthesis of wind-force, weight transfer amount on Q points and conducting wire suffered by each point.Various works
Acting science experiment and mechanics transmission firmly is analyzed as follows：
In the case that conducting wire and supporting-point be indeformable, conducting wire is indeformable, the pulling force f of O points, Q points is acted on1、f2Equivalent respectively
It is transmitted to arbitrary point M, M compositions is acted on, also, f1With f2A pair of equilibrant force equal in magnitude, direction is opposite is always constituted,
The movable property of conducting wire is identical on their Positive-Negative Action direction.Act on the bearing binding force N of O points, Q points1、N2Also equivalent passes
It is delivered to M points, M compositions is acted on, still, the movable property of M points changes with the change in location of M points, is being passed to show as power
Pass the illusion of middle variation.That is, the transmission according to mechanics about power recognizes, N1Being transmitted to M points becomes
N2Being transmitted to M points becomes
In formula, EMThe maximum virtuality waved a little, i.e. M points on conducting wire is made to wave nature parameters or deformation properties parameter.
In fact, according to acting science experiment, coefficientWithAll it is the parameter that measurement can be changed dynamic characteristic, is not the qualitative change for measuring power
Parameter.
If conducting wire arbitrary unit linear mass is expressed as ρ, the additional mass such as icing or artificial on unit length conducting wire
The ballast quality of configuration is Δ ρ, then, the gravity which receives jointly with additional mass is dG=(ρ+Δ ρ) gdl,
Transmission is acted on every bit on conducting wire by the gravity.As shown in figure 8, acting on the specific gravity dG transmission capacities of M points to arbitrary point
M ', M ' compositions are acted on, there are two types of the action effects (namely varying effect) generated：I, relative to the varying effect of O points
It is
II is relative to the varying effects of Q points
According to acting science experiment, coefficientWithAll be measure M ' under gravity dG effect variable properties parameters, rather than
It measures active force or actuating quantity changes the parameter of property.
The gravity that all unit masses generate on conducting wire will all transmit the every bit acted on conducting wire, i.e., arbitrary on conducting wire
Point receives the collective effect of all specific gravities on conducting wire.Transmission according to mechanics about power recognizes, and arbitrary point M ' connects on conducting wire
Resultant force by gravity is
Equally, as shown in figure 9, the wind active force dP transmission that unit length conducting wire receives at M points acts on M ' points, make
Constant with force value, action effect or varying effect accordingly change, i.e.,
The wind active force that all the points receive on conducting wire will all transmit each point acted on conducting wire, common synthesis one
The wind active force of each point variation of control.The wind of arbitrary point M ' receiving acts on resultant force
Conducting wire waves the cooperation control lower swing for being all attributed to that arbitrary point receives at it on conducting wire.Therefore, arbitrary point
The joint force of receiving and its to wave the relation equation between variation be exactly equation for describing conductor galloping mechanism.By comprehensive
It closes analysis to learn, arbitrary point M's waves equation and can also be expressed as follows：
It can be seen that according to this equation：Conductor galloping is controlled by various effects, while being waved a little between supporting-point
Distance, wave quality control, that is, controlling the principal element waved is effect and waves matter void relation condition or characteristic a little.Cause
This, the best measure of anti-dance is to eliminate the steric requirements that can be waved, and increases the amount of substance waved a little.Wherein, try to increase branch
It holds density a little, the straight line degree for tensing conducting wire, increasing conducting wire, increase that wave the quality of each point on conducting wire be all the easy to handle of anti-dance
Method, best bet be by transmission pressure in the form of cable, be fixed on the bridge that can not be waved or in subsurface formations.
In conclusion current study the system integrity for lacking mechanism understanding about Galloping of Overhead Transmission Line both at home and abroad, to anti-
The critical issue of dance is grasped not accurate enough.Galloping of Overhead Transmission Line is set forth in detail according to effect theory and method in the present invention
Basic law and mechanism, and indicate key and method that anti-dance is administered, add new science for the improvement of transmission pressure anti-dance
Research direction.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, this
Field technology personnel make a little simple modification, equivalent variations or modification using the technology contents of the disclosure above, all fall within this hair
In bright protection domain.
Claims (5)
1. a kind of research method of Galloping of Overhead Transmission Line mechanism, which is characterized in that by the stagnant row equation of acting science experiment and equation is run,
Obtain the stagnant row equation at any point and operation equation on transmission pressure：
X in formula1tIndicate the displacement loss total amount generated under viscous motion effect control by position, v10Indicate that initial stagnant line position moves speed
Degree, t indicate that conductor galloping time, F indicate active force；
x2tIndicate unbalance displacement, v20Indicate initial imbalance velocity of displacement；
On transmission pressure arbitrarily by position with constraint point the distance between be r1, on transmission pressure arbitrarily by position with it is maximum
The distance between flexural deformation point is r2, the distance between constraint point maximum flexibility point is r.
2. the research method of Galloping of Overhead Transmission Line mechanism according to claim 1, which is characterized in that
The wind-force P that unit wire quality receives at M points on conducting wire, which is transmitted to, makes unit conducting wire generation at B points after becoming P ' at B
Waving acceleration is
In formula, EMAnd EBIt is illustrated respectively in waving for point M and point B under the control for the driving force P that unit wire quality at M receives
Property, ρ indicate wire density；M points be amplitude maximum point is waved on conducting wire, so, EMRepresent it is maximum wave a little wave journey
Degree, can further be provided according to this functional expression put on conducting wire wave rule：Point waves acceleration and ratio system on conducting wire
NumberIt is directly proportional, it is directly proportional to the action intensity of conducting wire to wind, it is directly proportional to the long l of conducting wire span, wave waving a little with maximum
Traverse degree EMIt is worth directly proportional, is inversely proportional with wire density.
3. the research method of Galloping of Overhead Transmission Line mechanism according to claim 1, which is characterized in that
According to equationTransmission pressure can not wave degreeJourney can be waved
DegreeWork as r1When=r, r2=0, the nature and characteristic value that can not wave of conducting wire reaches minimum value i.e. T=0；Property spy can be waved
Value indicative reaches maximum value i.e. E=1；Work as r1When=0, r2The nature and characteristic value that can not wave of=r, conducting wire reach maximum value i.e. T=1；
Nature and characteristic value can be waved and reach minimum value i.e. E=0；
Therefore, it to prevent from waving, it can be by reducing on conducting wire arbitrarily by the distance between position and constraint position r1Method
To realize；Reduce r1Value actually requires to make arbitrarily all to be bound in by position on the position that can not be waved, also
It is to say, if each point of transmission pressure is all bound on the rigid objects of the motionless bridge one kind of wind, it will be
It keeps not waving state under wind action.
4. the research method of Galloping of Overhead Transmission Line mechanism according to claim 1, which is characterized in that
Relation equation on conducting wire between the deformation displacement of arbitrary point B and various governing factors is
In formula, x indicates the deformation displacement of B points on conducting wire；EBIndicate the degree of deformability of B points；EMIndicate the degree of deformability of M points,
Measure the deformation properties of maximum distortion displacement point；G ', P ' and f '2Unit mass conducting wire receiving at B points on conducting wire is indicated respectively
Gravity, wind power and pulling force；G, P and f2Gravity, wind that the conducting line segment between two constraint points O and Q integrally receives are indicated respectively
Blowing force and pulling force；B and b ' indicates the length of two line segment of OB and BM respectively.
5. the research method of Galloping of Overhead Transmission Line mechanism according to claim 2, which is characterized in that
According to equationWith conductor galloping basic law, it may be considered that by tensing transmission pressure, protecting
Hold conducting wire always linear state, increase can not wave nature parameters T values, reduce can wave nature parameters EBValue and EMValue increases
The methods of wire density eliminates the target of conductor galloping to realize.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113451969A (en) * | 2021-07-30 | 2021-09-28 | 国网河南省电力公司电力科学研究院 | Optimization method of clamp rotary type double-pendulum anti-galloping device |
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| US2727085A (en) * | 1949-12-19 | 1955-12-13 | Earl L Tornquist | Suppressing galloping conductors |
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| CN101847855A (en) * | 2010-05-25 | 2010-09-29 | 中国电力工程顾问集团中南电力设计院 | Conductor galloping resistant method of iron towers of overhead power transmission lines |
| CN105302977A (en) * | 2015-11-09 | 2016-02-03 | 鲁东大学 | Calculating method for mechanical waving force and frequency relation of overhead transmission line |
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2018
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| US2727085A (en) * | 1949-12-19 | 1955-12-13 | Earl L Tornquist | Suppressing galloping conductors |
| US3904811A (en) * | 1971-07-28 | 1975-09-09 | Fujikura Ltd | Overhead transmission lines with damper means for preventing galloping oscillations |
| CN101847855A (en) * | 2010-05-25 | 2010-09-29 | 中国电力工程顾问集团中南电力设计院 | Conductor galloping resistant method of iron towers of overhead power transmission lines |
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| CN113451969A (en) * | 2021-07-30 | 2021-09-28 | 国网河南省电力公司电力科学研究院 | Optimization method of clamp rotary type double-pendulum anti-galloping device |
| CN113451969B (en) * | 2021-07-30 | 2022-06-10 | 国网河南省电力公司电力科学研究院 | Optimization method of clamp rotary type double-pendulum anti-galloping device |
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