CN109936107A - A kind of wrong frequency coupling vibration-reducing control method of transmission line of electricity - Google Patents
A kind of wrong frequency coupling vibration-reducing control method of transmission line of electricity Download PDFInfo
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- CN109936107A CN109936107A CN201910249672.9A CN201910249672A CN109936107A CN 109936107 A CN109936107 A CN 109936107A CN 201910249672 A CN201910249672 A CN 201910249672A CN 109936107 A CN109936107 A CN 109936107A
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- transmission line
- electricity
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- laying tension
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Abstract
The invention discloses a kind of wrong frequency coupling vibration-reducing control methods of transmission line of electricity.The present invention is mainly by conventionally employed three phase line laying tension is identical, arc sag is identical, moves towards parallel power transmission line original configuration, it is changed to the power transmission line vibration damping configuration using three-phase laying tension differentiation, the differentiation of tension causes the difference on the frequency alienation of three-phase spring oscillator, realizes that the vibration damping of whole system controls by the frequency mismatch and coupling of alternate oscillator；Power transmission line vibration damping configuration controls in appropriate range relative to the arc sag amplitude of variation of original configuration, to ensure route safe operation and line style total tune beauty.The present invention preferably solves the problems, such as vibration control across flexible structure greatly by adjusting the laying tension of three phase line.
Description
Technical field
The invention belongs to antivibration areas across flexible structure greatly, and in particular to a kind of based on the defeated of laying tension differentiation
The wrong frequency coupling vibration-reducing control method of electric line.
Background technique
Overhead transmission line belongs to greatly across flexible structure, when by high wind, earthquake and when the extreme environments incentive action such as deicing,
Route can generate significantly low-frequency vibration, easily cause alternate flashover tripping, or even cause the major accidents such as wire breaking and tower falling.Tradition
Damping device can be only installed near power transmission tower, for entire route, the control of effective vibration damping can not be played and made
With；The applicable band of resonance vibration absorber is again narrow, in the transmission line of electricity under wideband environmental excitation effect, vibration damping effect
Fruit has significant limitation.The patent of invention " more coupling transmission line of electricity vibration insulating systems " of present invention applicant early period
(ZL201710260918.3) propose: frequency mismatch, stiffness of coupling, time delay be realize three of amplitude death it is crucial because
Element can make entire line system reach an optimal state by adjusting these three parameters, to realize that power transmission line shakes
Width is dead, achievees the purpose that vibration damping controls.On this basis, how to provide one kind simply and effectively may be implemented frequency mismatch
Method is the purpose that we further study.
Summary of the invention
The purpose of the present invention is to provide a kind of power transmission lines that can preferably solve the problems, such as greatly across flexible structure vibration control
The wrong frequency coupling vibration-reducing control method in road, that is, adjust the laying tension of three phase line, the differentiation of tension causes three-phase spring
The difference on the frequency alienation of oscillator realizes that the vibration damping of whole system controls by the frequency mismatch and coupling of alternate oscillator.
The purpose of the present invention is by the following technical solutions to realize:
The wrong frequency coupling vibration-reducing control method of the transmission line of electricity is a kind of based on the unwrapping wire for being provided with conductor spacer transmission line of electricity
Power differentiation vibration-reducing control method；The conductor spacer transmission line of electricity that is provided with is to be provided with several on every phase transmission line of electricity
Every stick, conductor spacer is spaced apart by the conductors on quad bundled of every phase transmission line of electricity, is also equipped between each other in three phase line
Inter-phase spacer；Its main feature is that: by conventionally employed three phase line laying tension is identical, arc sag is identical, moves towards in parallel
Power transmission line original configuration is changed to cause three using the power transmission line vibration damping configuration of three-phase laying tension differentiation, the differentiation of tension
The difference on the frequency alienation of phase spring oscillator realizes that the vibration damping of whole system controls by the frequency mismatch and coupling of alternate oscillator；It is defeated
Electric wire vibration damping configuration relative to original configuration arc sag amplitude of variation control in appropriate range, with ensure route safe operation and
Line style total tune is beautiful.
The power transmission line vibration damping configuration is specific in appropriate range relative to the arc sag amplitude of variation control of original configuration
Method is: the laying tension of the highest phase transmission line of electricity in spatial position is raised 3%~5%, remaining two-phase transmission line of electricity
Laying tension is unified to lower 3%~5%；Alternatively, the laying tension of the highest phase transmission line of electricity in spatial position is remained unchanged,
The laying tension of remaining two-phase transmission line of electricity is unified to lower 6%~10%.
Further, the unwrapping wire of the laying tension of the highest phase transmission line of electricity in spatial position and remaining two-phase transmission line of electricity
The differentiation of power is controlled to 10%.In this way, the wrong frequency coupling effectiveness in vibration suppression of whole system is clearly, even up to close to amplitude
Dead optimum control state.
Specifically, the relationship such as formula (1) between the laying tension of transmission line of electricity and the arc sag of transmission line of electricity is shown:
In formula (1), T is the laying tension of transmission line of electricity, and m is the equivalent mass of single-phase power transmission line unit length, and L is defeated
The span of electric line, h are the arc sag of transmission line of electricity；
After single-phase power transmission line sag adjustment can be calculated by formula (1), the changing value of laying tension.
Specifically, the relationship such as formula (2) of vibration frequency and its laying tension outside power transmission line road surface, in face, formula (3) institute
Show:
In formula (2), formula (3), T is the laying tension of transmission line of electricity, and m is the equivalent matter of single-phase power transmission line unit length
Amount, L are the span of transmission line of electricity, FnFor vibration frequency outside transmission line of electricity n terrace, fnFor antisymmetric vibration in transmission line of electricity n terrace
Frequency；
As formula (2), formula (3) can computing electric power line laying tension changing value caused by transmission line of electricity vibration frequency
Changing value.
Oscillation damping method of the present invention breaks conventional mentality of designing, i.e., in common overhead transmission line design process, three-phase
The laying tension of route takes identical value, and the configuration of three-phase line is identical after construction, moves towards parallel mode, utilizes three-phase unwrapping wire
The small differences of tension and the wrong frequency coupling vibration damping for realizing whole system.Experimental study shows using vibration damping side of the invention
Method, when the differentiation of three-phase line laying tension reaches 10%, the wrong frequency of whole system couples effectiveness in vibration suppression clearly, very
To the optimum control state reached close to amplitude death.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for being provided with the three-phase quadripartion transmission line of electricity of conductor spacer.
Fig. 2 is the enlarged drawing of the conductors on quad bundled part in Fig. 1 with conductor spacer.
Fig. 3 is the more coupling dynamic system schematic diagrames of three phase transmission line of three-phase quadripartion transmission line of electricity shown in Fig. 1.
Fig. 4 is the schematic illustration of three-phase quadripartion transmission line of electricity application the method for the present invention shown in Fig. 1.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
Referring to Fig. 1, for be provided with conductor spacer 6 three-phase quadripartion transmission line of electricity structural schematic diagram, in Fig. 1,2,3,4 points
The first, second, third phase conductors on quad bundled transmission line of electricity is not indicated, and 7,8,9 respectively indicate the first, second, third phase quadripartion
The inter-phase spacer being arranged between conducting wire transmission line of electricity, L are the span of transmission line of electricity, and L1, L2, L3 respectively indicate inter-phase spacer
7,8,9 spacing arranged in direction along the line.
For without loss of generality, illustrate for three-phase quadripartion transmission line of electricity shown in Fig. 1 of the embodiment of the present invention, between having
Enlarged drawing every the conductors on quad bundled part 5 of stick 6 indicates the conductors on quad bundled of a certain phase as shown in Fig. 2, in Fig. 2,1.It will interval
Stick 6 regards a mass block as, and when conductor spacer 6 is subjected to displacement, power transmission line generates nonlinear elasticity restoring force, therefore, between single
It can simplify every stick with the power transmission line being connect as a Non-linear Spring Oscillator.There are multiple conductor spacers to shake on every phase transmission line of electricity
Son, three phase transmission line constitute a big more coupling dynamic systems by inter-phase spacer 7,8,9, as shown in Figure 3.
Referring to fig. 4, such as using the detailed process and principle explanation of the wrong frequency coupling vibration-reducing control method of transmission line of electricity of the present invention
Under:
As can be seen from Fig. 4, the original configuration of 2,3,4 three phase lines is: using the identical routine of three-phase laying tension
Design, three phase transmission line arc sag is identical, and trend is parallel.
10,11,12 three phase lines are to correspond respectively to 2,3,4 three phase lines using after the method for the present invention
Power transmission line vibration damping configuration: using the optimization design of three-phase laying tension differentiation, the differentiation of tension can cause three-phase spring vibration
The difference on the frequency alienation of son realizes that the vibration damping of whole system controls by the frequency mismatch and coupling of alternate oscillator.
In Fig. 4,13,14,15 be arc sag amplitude of variation of the three phase transmission line vibration damping configuration relative to original configuration, from Fig. 4
In as it can be seen that the first phase conductors on quad bundled transmission line of electricity 2 laying tension up-regulation become larger, arc sag becomes smaller；Second phase quadripartion is led
The laying tension downward of line transmission line of electricity 3 becomes smaller, and arc sag becomes larger；The laying tension of third phase conductors on quad bundled transmission line of electricity 4
Downward becomes smaller, and arc sag becomes larger；Moderate control arc sag amplitude of variation, ensures route safe operation and line style total tune is beautiful.
In common overhead transmission line design process, the laying tension of three-phase line can generally take identical value, because
And the configuration of three-phase line is identical after constructing, trend is parallel.Oscillation damping method of the present invention breaks conventional mentality of designing, utilizes three-phase
The small differencesization of laying tension realize the wrong frequency coupling vibration damping of system.Experimental study shows when three-phase line laying tension
When differentiation reaches 10%, the wrong frequency of whole system couples effectiveness in vibration suppression clearly, even up to most close to amplitude death
Excellent state of a control.
Outside power transmission line face, the relationship of in plane vibration frequency and laying tension it is as follows:
In formula (2), formula (3), T is the laying tension of transmission line of electricity, and m is the equivalent matter of single-phase power transmission line unit length
Amount, L are the span of transmission line of electricity, FnFor vibration frequency outside transmission line of electricity n terrace, fnFor antisymmetric vibration in transmission line of electricity n terrace
Frequency.
According to formula (2) or (3) it is found that line system is divided for common Great span, when putting for certain phase power transmission line more
When line tension increases or reduces 10%, each rank vibration frequency will be raised and lowered 5% or so, phase power transmission line upper spring vibration
The frequency of son also can be increased or be reduced.The difference of spring oscillator frequency between phase and phase, it is meant that vibrated in whole system
In the process, each phase oscillator is difficult synchronous vibration occur, it is this it is asynchronous can cause alternate oscillator mutually involve and restrict and
The dispersion transmitting and dissipation of vibrational energy, to play the purpose of vibration damping control.
Relationship between arc sag and laying tension is as follows:
In formula (1), T is the laying tension of transmission line of electricity, and m is the equivalent mass of single-phase power transmission line unit length, and L is defeated
The span of electric line, h are the arc sag of transmission line of electricity.
According to formula (1) it is found that line system is divided for common Great span, when the laying tension of certain phase power transmission line more
When increasing or reducing 10%, span centre arc sag will be decreased or increased 10% or so.Line of the 10% arc sag variation to power transmission line
Type does not have apparent influence, can ensure the total tune and beauty of three-phase line.Comprehensively consider line security operation and applies
Work such as facilitates at the reasons, can choose when specific operation the laying tension of the highest phase in spatial position raising 3%~5%, remaining
The laying tension of phase is unified to lower 3%~5%, or selection remains unchanged the laying tension of the highest phase in spatial position, remaining
It is mutually unified to lower 6%~10%.
Claims (5)
1. a kind of wrong frequency coupling vibration-reducing control method of transmission line of electricity is a kind of based on the unwrapping wire for being provided with conductor spacer transmission line of electricity
Power differentiation vibration-reducing control method；The conductor spacer transmission line of electricity that is provided with is to be provided with several on every phase transmission line of electricity
Every stick, conductor spacer is spaced apart by the conductors on quad bundled of every phase transmission line of electricity, is also equipped between each other in three phase line
Inter-phase spacer；It is characterized by: conventionally employed three phase line laying tension is identical, arc sag is identical, trend is parallel
Power transmission line original configuration, be changed to the power transmission line vibration damping configuration using three-phase laying tension differentiation, the differentiation of tension causes
The difference on the frequency alienation of three-phase spring oscillator realizes that the vibration damping of whole system controls by the frequency mismatch and coupling of alternate oscillator；
Power transmission line vibration damping configuration controls in appropriate range relative to the arc sag amplitude of variation of original configuration, to ensure route safe operation
And line style total tune is beautiful.
2. the wrong frequency coupling vibration-reducing control method of transmission line of electricity according to claim 1, it is characterised in that: the power transmission line vibration damping
Configuration controls the specific method in appropriate range relative to the arc sag amplitude of variation of original configuration: spatial position is highest
The laying tension up-regulation 3%~5% of one phase transmission line of electricity, the laying tension of remaining two-phase transmission line of electricity is unified to lower 3%~
5%；Alternatively, the laying tension of the highest phase transmission line of electricity in spatial position is remained unchanged, remaining two-phase transmission line of electricity is put
Line tension is unified to lower 6%~10%.
3. the wrong frequency coupling vibration-reducing control method of transmission line of electricity according to claim 2, it is characterised in that: spatial position is highest
The differentiation of the laying tension of the laying tension and remaining two-phase transmission line of electricity of one phase transmission line of electricity is controlled to 10%.
4. the wrong frequency coupling vibration-reducing control method of transmission line of electricity according to claim 3, it is characterised in that: the unwrapping wire of transmission line of electricity
Shown in relationship such as formula (1) between tension and the arc sag of transmission line of electricity:
In formula (1), T is the laying tension of transmission line of electricity, and m is the equivalent mass of single-phase power transmission line unit length, and L is power transmission line
The span on road, h are the arc sag of transmission line of electricity；
After single-phase power transmission line sag adjustment can be calculated by formula (1), the changing value of laying tension.
5. the wrong frequency coupling vibration-reducing control method of transmission line of electricity according to claim 4, it is characterised in that: outside power transmission line road surface,
Relationship such as formula (2), the formula (3) of vibration frequency and its laying tension in face are shown:
In formula (2), formula (3), T is the laying tension of transmission line of electricity, and m is the equivalent mass of single-phase power transmission line unit length, and L is
The span of transmission line of electricity, FnFor vibration frequency outside transmission line of electricity n terrace, fnFor antisymmetric vibration frequency in transmission line of electricity n terrace；
As formula (2), formula (3) can computing electric power line laying tension changing value caused by transmission line of electricity vibration frequency change
Change value.
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| CN201910249672.9A CN109936107B (en) | 2019-03-29 | 2019-03-29 | Power transmission line frequency-staggering coupling vibration attenuation control method |
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| CN201910249672.9A CN109936107B (en) | 2019-03-29 | 2019-03-29 | Power transmission line frequency-staggering coupling vibration attenuation control method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2534020A1 (en) * | 1975-07-28 | 1977-02-24 | Mannesmann Roehren Werke Ag | Spacer and oscillation damper for overhead HT transmission lines - has foam-filled tube to anchor ends of spacer arms |
| CN101924338A (en) * | 2010-08-09 | 2010-12-22 | 中国电力科学研究院 | Method for suppressing dancing and alternate flashover of single-lead transmission line |
| CN106638311A (en) * | 2016-11-15 | 2017-05-10 | 湖南科技大学 | Multi-cable compounded damping cable |
| CN106898984A (en) * | 2017-04-20 | 2017-06-27 | 湖南科技大学 | Many coupling transmission line of electricity vibration insulating systems |
| CN206685856U (en) * | 2017-04-20 | 2017-11-28 | 湖南科技大学 | More coupling transmission line of electricity vibration insulating systems |
-
2019
- 2019-03-29 CN CN201910249672.9A patent/CN109936107B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2534020A1 (en) * | 1975-07-28 | 1977-02-24 | Mannesmann Roehren Werke Ag | Spacer and oscillation damper for overhead HT transmission lines - has foam-filled tube to anchor ends of spacer arms |
| CN101924338A (en) * | 2010-08-09 | 2010-12-22 | 中国电力科学研究院 | Method for suppressing dancing and alternate flashover of single-lead transmission line |
| CN106638311A (en) * | 2016-11-15 | 2017-05-10 | 湖南科技大学 | Multi-cable compounded damping cable |
| CN106898984A (en) * | 2017-04-20 | 2017-06-27 | 湖南科技大学 | Many coupling transmission line of electricity vibration insulating systems |
| CN206685856U (en) * | 2017-04-20 | 2017-11-28 | 湖南科技大学 | More coupling transmission line of electricity vibration insulating systems |
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