CN107796975A - A kind of design method of optical current mutual inductor and vibration-proof structure with vibration-proof structure - Google Patents
A kind of design method of optical current mutual inductor and vibration-proof structure with vibration-proof structure Download PDFInfo
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- CN107796975A CN107796975A CN201710994579.1A CN201710994579A CN107796975A CN 107796975 A CN107796975 A CN 107796975A CN 201710994579 A CN201710994579 A CN 201710994579A CN 107796975 A CN107796975 A CN 107796975A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- Vibration Prevention Devices (AREA)
Abstract
A kind of design method of optical current mutual inductor and vibration-proof structure with vibration-proof structure, it is related to a kind of external clamping type optical current mutual inductor with vibration-proof structure applied in power system, in order to solve the problems, such as the anti shock and vibration difference of existing optical current mutual inductor.The optical current mutual inductor of the present invention is arranged on the surrounding of busbar tube, and upper measurement ring and lower measurement ring are docking together by fastener, and shock absorber is arranged between current transformer and busbar tube；The design method of the shock absorber is：The type and material for the positions and dimensions selection shock absorber installed according to current transformer；Set the preliminary structure and size of damper；Vibration-mode analysis is carried out to damper using ANSYS softwares, calculates intrinsic frequency and vibration shape；Untill effectiveness in vibration suppression meets design requirement.Beneficial effect is that the anti shock and vibration transport of optical current mutual inductor of the present invention is less than 10%, is effectively improved the vibration and interference resistance of optical current mutual inductor.
Description
Technical field
The present invention relates to a kind of external clamping type optical current mutual inductor with vibration-proof structure applied in power system.
Background technology
Optical current mutual inductor has the advantages of many conventional electromagnetic current transformer institutes are incomparable：Insulating properties are excellent
Good, non-transient magnetic saturation, range of dynamic measurement is big, frequency response is wide, anti-electromagnetic interference capability is strong, small in volume, easily with
Digital facility interface etc., especially suitable for the measurement of high-voltage large current, had broad application prospects in power system；So
And optical current mutual inductor to the sensitiveness of mechanical oscillation be hinder its in power system the most difficult obstacle of popularization and application it
One.On influence of the impact shock to photoelectricity transmission, studies in China shows：The intrinsic frequency of platform structure is improved, increases structure
Damping, the position of reasonable Arrangement optical element, is effective vibration control measure.Flexible support vibration-isolating platform can reduce relative mistake
Tune amount.But misalignment rate increases on the contrary caused by exciting source on platform.Due to the certainty and platform structure weight of position of optical element
Amount limitation, is difficult to carry out vibration control.It is practical due to many technical barriers such as the degree of accuracy is low, operation stability is poor be present
Optical current mutual inductor at present it is still rare.
Part of optical current mutual inductor experiences a shock vibration in the process of running, it is possible to causes protective relaying device
Malfunction, there is no satisfied solution method at present, only by vibration reducing measure, reduce that protective relaying maloperation makees as far as possible can
Energy.So the damage of the influence and impulsive force of the accurate measurement of optical element to equipment, reply are set in order to reduce impact shock
It is standby to make surge guard or vibration damping isolation.The safety and stability of intelligent grid and the reliability of equipment are closely bound up, so optical current
The shock resistance of transformer must reach associated specifications.But in most cases, the structure for carrying out system is set
Timing often ignores the design of anti shock and vibration, therefore the shock resistance research for carrying out vibrating isolation system is very significant.
The content of the invention
The invention aims to solve the problems, such as the anti shock and vibration difference of existing optical current mutual inductor, it is proposed that
A kind of design method of optical current mutual inductor and vibration-proof structure with vibration-proof structure.
A kind of optical current mutual inductor with vibration-proof structure of the present invention,
The external clamping type optical current mutual inductor is arranged on the surrounding of busbar tube；
The optical transformer includes upper measurement ring, lower measurement ring, shock absorber and fastener；
The upper measurement ring and lower measurement ring are docking together by fastener；
The shock absorber is arranged between external clamping type optical current mutual inductor and busbar tube.
The design method of optical current mutual inductor vibration-proof structure of the present invention comprises the following steps：
Step 1: according to external clamping type optical current mutual inductor install position and installation dimension select shock absorber type and
The material of damper；
Step 2: the preliminary structure and size of setting damper；
Step 3: mode of oscillation is carried out to the damper set in step 2 using finite element analysis tool ANSYS software
Analysis, calculate the intrinsic frequency and vibration shape of damper；
Step 4: if the effectiveness in vibration suppression of damper meets design requirement, carry out shock absorber trial-production in kind and material object shakes
Dynamic test；Otherwise return to step 2 to optimize the structure snd size of damper, until the effectiveness in vibration suppression of shock absorber meets to set
Untill meter requires；
A kind of optical current mutual inductor with vibration-proof structure can be produced according to the specific steps of more design method.
The beneficial effects of the invention are as follows the anti shock and vibration transport of optical current mutual inductor of the present invention to be less than
10%, it is effectively improved the vibration and interference resistance of optical current mutual inductor.
Brief description of the drawings
Fig. 1 is a kind of structural representation of optical current mutual inductor with vibration-proof structure described in embodiment one
Figure.
Embodiment
Embodiment one：Illustrate present embodiment with reference to Fig. 1, one kind described in present embodiment carries vibration-proof structure
Optical current mutual inductor, the external clamping type optical current mutual inductor is arranged on the surrounding of busbar tube 1；
The optical transformer includes upper measurement ring 2-1, lower measurement ring 2-2, shock absorber 3 and fastener 4；
The upper measurement ring 2-1 and lower measurement ring 2-2 are docking together by fastener 4；
The shock absorber 3 is arranged between external clamping type optical current mutual inductor 2 and busbar tube 1.
In the present embodiment, fastener 4 is bolt or nut；Using the shock absorber 3 of present embodiment, external clamping type optics
The vibration transmissibility of current transformer is less than 10%, is effectively improved the vibration and interference resistance of optical current mutual inductor.
Embodiment two：Present embodiment is to a kind of light with vibration-proof structure described in embodiment one
Learn current transformer further to limit, in the present embodiment, the quantity of the shock absorber 3 is four；
The upper measurement ring 2-1 and lower measurement ring 2-2 inner ring side are respectively arranged with two rectangular recess；
Four shock absorbers 3 are separately positioned in four rectangular recess.
Embodiment three：Present embodiment is to a kind of light with vibration-proof structure described in embodiment one
Learn current transformer further to limit, in the present embodiment, the upper measurement ring 2-1 and lower measurement ring 2-2 interface are
Measure ring median plane；
Two planes with measurement ring median plane angle at 45 ° are damping area；
Four rectangular recess are respectively positioned at two damping areas and the upper point of intersection for measuring ring 2-1 and two damping areas with
Measure ring 2-2 point of intersection.
In the present embodiment, by above form arrangement damper 3, best effectiveness in vibration suppression can be reached.
Embodiment four：Present embodiment is to a kind of light with vibration-proof structure described in embodiment one
Learn current transformer further to limit, in the present embodiment, the shock absorber 3 is multipoint mode rubber shock absorber；
Shock absorber 3 includes substrate and two groups of boss；
Substrate is cuboid；
The boss quantity of every group of boss is four, and the diameter of four boss and highly different；
One end face of one group of boss is arranged on the upper surface of substrate simultaneously, and an end face of another group of boss is set simultaneously
Put on the lower surface of substrate.
In the present embodiment, multipoint mode rubber shock absorber has the characteristics of versatile, applicability is wide；It is and this to subtract
Shake device 3 can bear the load of any direction, absorb the vibration of any direction；Multipoint mode rubber shock absorber is by four intersection boss
Platform carrys out bearing load, bearing area is increased with the increase of load, and when boss is pressurized, layer segment is because by load in substrate
And become to bend waveform；Vibrational energy is transmitted by boss and bending waveform, multipoint mode rubber shock absorber and flat board rubber blanket
It is big compared to the distance passed through, it can preferably disperse and absorb the vibration of any direction, the elasticity of rubber preferably played, in water
In the presence of flat power, circular bosses play a part of braking, can anti-mechanical slip；Multipoint mode rubber shock absorber is using oil resistant, resistance to old
The damping silicon rubber of change, service life length, heat-resisting, oil resistant are easy to use.
Embodiment five：The design method of optical current mutual inductor vibration-proof structure described in present embodiment, this sets
Meter method comprises the following steps：
Step 1: the position installed according to external clamping type optical current mutual inductor and installation dimension select the type of shock absorber 3
With the material of damper 3；
Step 2: the preliminary structure and size of setting damper 3；
Step 3: mode of oscillation is carried out to the damper 3 set in step 2 using finite element analysis tool ANSYS software
Analysis, calculate the intrinsic frequency and vibration shape of damper 3；
Step 4: if the effectiveness in vibration suppression of damper 3 meets design requirement, the trial-production in kind of shock absorber 3 and material object are carried out
Vibration test；Otherwise return to step 2 to optimize the structure snd size of damper 3, until the effectiveness in vibration suppression of shock absorber 3 expires
Untill sufficient design requirement requirement.
It is a specific embodiment below,
Optical current mutual inductor vibration-proof structure described in present embodiment, it is for applying in power system GIS, HGIS
Or the external clamping type optical current mutual inductor of potting breaker, the most serious that external clamping type optical current mutual inductor is subject in operation
Vibration effect belongs to impact shock, and rubber absorbers can effectively absorb transient impact, therefore the step of present embodiment rapidly
Rubber absorbers are selected in one；Vibration isolation rubber rigidity and the requirement of damping are determined from damping silicon in view of shock absorber 3 simultaneously
Rubber solid185 super-elasticity units, material are arranged to：Density p=1.2 × 103kg/m3；Poisson's ratio：μ=0.48；Springform
Amount：E=7.8 × 1010Pa。
The preliminary structure and size of damper 3 are set in step 2, it is contemplated that the overall layout of damper 3, rubber shock-absorbing
The rubber blanket axial length L of device is not less than 100mm, typically takes between 100mm to 120mm preferably, thickness H is 10mm.
In actual applications, surface laying of the rubber blanket of rubber absorbers along cylindric busbar tube 1, can produce one
Fixed deformation, in arc-shaped cube rather than standard rectangular, so the width of rubber blanket is unsuitable excessive；Simultaneously, it is contemplated that cylinder
The size of shape busbar tube 1, design rubber blanket correspond to central angle as 10 °；Now, in the actual process of deployment of rubber blanket caused by shape
State, which changes, to be ignored；Through conversion, rubber blanket width W is 70mm；
Therefore, the rubber blanket size for drawing rubber absorbers is：Length L is 100mm, and width W is 70mm, and thickness H is
10mm。
The purpose of vibration-mode analysis is to determine the eigenfrequncies and vibration models of system in step 3, is that system avoids resonating,
It is also predicted that the vibration shape under different loads effect；In the anti shock and vibration system of present embodiment, the He of busbar tube 1
External clamping type optical current mutual inductor is all the aluminium alloy of nonferromugnetic material, directly can be added in the material depot of ANSYS softwares
Add；The material selection of the rubber blanket of rubber shock absorber is damping silicon rubber solid185 super-elasticity units, oneself can be set,
It is then added in material depot；Typically in vibration-mode analysis, the vibration shape under preceding quadravalence intrinsic frequency and the frequency is enough instead
Mirror the principal vibration characteristic of system, as long as therefore it is general carry out before quadravalence model analysis, it is possible to the vibration damping system designed
The vibration shape and largest deformation amount under the quadravalence intrinsic frequency of system and every rank intrinsic frequency.
The preceding quadravalence intrinsic frequency of four rubber absorbers of present embodiment is respectively：590.81Hz、591.54Hz、
620.2Hz and 707.06Hz, the max architecture deformation under intrinsic frequency are respectively：6.01mm, 5.99mm, 9.83mm and
7.57mm。
The effect vibrated according to ANSYS softwares dynamic analog, it is exactly test addition to weigh effectiveness in vibration suppression most straightforward approach
The amplitude response of target device after vibration reducing measure, amplitude is smaller, and effectiveness in vibration suppression is better；ANSYS softwares are being used to this embodiment party
, it is necessary to which impact loading carries out simulation setting, mould when external clamping type optical current mutual inductor in formula carries out anti shock and vibration emulation
Plan shock loading is impact acceleration, duration 10ms, maximum 40g, can directly take 400m/s2.During load is set,
It is square wave for three steps that can set, and the 1st step action time was 0 to 10ms, impacting acceleration value 400m/s2；2nd step is
10ms moments, impact acceleration are changed into 0 from maximum,；After 3rd step takes 10ms, impact acceleration 0.Impact acceleration adds
Carry in a single direction, in the present embodiment, be arranged on gravity vertical direction.
In the present embodiment, after the rubber absorbers that the increase present invention designs, vibration insulating system is in 400m/s2Impact shock
Under, its peak swing is 1.7 × 10-2Mm, vibration duration are 2.5 × 10-2s。
Claims (5)
1. a kind of optical current mutual inductor with vibration-proof structure, the external clamping type optical current mutual inductor is arranged on busbar tube
(1) surrounding；
Characterized in that, the optical transformer includes upper measurement ring (2-1), lower measurement ring (2-2), shock absorber (3) and fastener
(4)；
The upper measurement ring (2-1) and lower measurement ring (2-2) are docking together by fastener (4)；
The shock absorber (3) is arranged between external clamping type optical current mutual inductor (2) and busbar tube (1).
A kind of 2. optical current mutual inductor with vibration-proof structure according to claim 1, it is characterised in that the vibration damping
The quantity of device (3) is four；
The inner ring side of the upper measurement ring (2-1) and lower measurement ring (2-2) is respectively arranged with two rectangular recess；
Four shock absorbers (3) are separately positioned in four rectangular recess.
A kind of 3. optical current mutual inductor with vibration-proof structure according to claim 2, it is characterised in that the upper survey
The interface for measuring ring (2-1) and lower measurement ring (2-2) is measurement ring median plane；
Two planes with measurement ring median plane angle at 45 ° are damping area；
Four rectangular recess are respectively positioned at two damping areas and the point of intersection of upper measurement ring (2-1) and two damping areas and lower survey
Measure the point of intersection of ring (2-2).
A kind of 4. optical current mutual inductor with vibration-proof structure according to claim 1, it is characterised in that the vibration damping
Device (3) is multipoint mode rubber shock absorber；
Shock absorber (3) includes substrate and two groups of boss；
Substrate is cuboid；
The boss quantity of every group of boss is four, and the diameter of four boss and highly different；
One end face of one group of boss is arranged on the upper surface of substrate simultaneously, and an end face of another group of boss is arranged on simultaneously
On the lower surface of substrate.
5. the design method of optical current mutual inductor vibration-proof structure, it is characterised in that the design method comprises the following steps：
Step 1: according to external clamping type optical current mutual inductor install position and installation dimension select shock absorber (3) type and
The material of damper (3)；
Step 2: the preliminary structure and size of setting damper (3)；
Step 3: mode of oscillation point is carried out to the damper (3) set in step 2 using finite element analysis tool ANSYS software
Analysis, calculate the intrinsic frequency and vibration shape of damper (3)；
Step 4: damper (3) if effectiveness in vibration suppression meet design requirement, carry out shock absorber (3) trial-production in kind and in kind
Vibration test；Otherwise return to step 2 to optimize the structure snd size of damper (3), until the vibration damping of shock absorber (3) is imitated
Untill fruit meets design requirement requirement；
A kind of optical current mutual inductor with vibration-proof structure can be produced according to the specific steps of more design method.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710994579.1A CN107796975A (en) | 2017-10-23 | 2017-10-23 | A kind of design method of optical current mutual inductor and vibration-proof structure with vibration-proof structure |
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| CN201710994579.1A CN107796975A (en) | 2017-10-23 | 2017-10-23 | A kind of design method of optical current mutual inductor and vibration-proof structure with vibration-proof structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110794192A (en) * | 2019-11-14 | 2020-02-14 | 衡阳市华仪电力互感器有限公司 | Power transformer that security performance is high |
| CN111157777A (en) * | 2020-01-14 | 2020-05-15 | 清华大学 | Design method of double-magnetic-core differential leakage current measurement sensor |
| CN114061879A (en) * | 2021-11-23 | 2022-02-18 | 吉林大学 | High formwork system stability detection early warning method and device |
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