CN105844029A - Research method for high voltage cable terminal joint - Google Patents
Research method for high voltage cable terminal joint Download PDFInfo
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- CN105844029A CN105844029A CN201610184041.XA CN201610184041A CN105844029A CN 105844029 A CN105844029 A CN 105844029A CN 201610184041 A CN201610184041 A CN 201610184041A CN 105844029 A CN105844029 A CN 105844029A
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000011160 research Methods 0.000 title claims abstract description 9
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- 230000005684 electric field Effects 0.000 claims abstract description 60
- 238000009826 distribution Methods 0.000 claims abstract description 20
- 238000004364 calculation method Methods 0.000 claims abstract description 12
- 238000009413 insulation Methods 0.000 claims description 20
- 238000013461 design Methods 0.000 claims description 13
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- 229910052802 copper Inorganic materials 0.000 description 3
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- 239000004944 Liquid Silicone Rubber Substances 0.000 description 1
- 241000406668 Loxodonta cyclotis Species 0.000 description 1
- 229910018503 SF6 Inorganic materials 0.000 description 1
- JXASPPWQHFOWPL-UHFFFAOYSA-N Tamarixin Natural products C1=C(O)C(OC)=CC=C1C1=C(OC2C(C(O)C(O)C(CO)O2)O)C(=O)C2=C(O)C=C(O)C=C2O1 JXASPPWQHFOWPL-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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Classifications
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The invention relates to a research method for a high voltage cable terminal joint. The method comprises following steps of S1), designing the integral structure shape size of a semiconductive stress cone component; S2), replacing the cone shape curve of the stress cone by using an arc spline curve approximation method; discretizing a plane curve into a set of range of points according to a certain step pitch; fitting the set of range of points by using an arc spline curve; successively calculating the distance d from the common tangent point of every two arcs to the original curve; executing a step S3) if the d is greater than a given error value Delta; executing a step S4) if the d is smaller than or equal to the given error value Delta; S3), interposing a new type value point on the original curve at a position corresponding to the shortest distance; fitting again by using the arc spline curve; returning to the step S2); S4), establishing a stress cone finite element two-dimensional calculation model; S5), carrying out finite element calculation; obtaining an electric field intensity partial vector diagram and an electric field intensity partial cloud diagram of the cone curve of the cable terminal joint; and verifying electric field distribution uniformity and reasonability of the terminal joint by a relationship diagram.
Description
Technical field
The present invention relates to hv cable termination joint technique field, especially relate to having of a kind of hv cable termination joint
Limit unit's computational methods and utilization arc-spline curve infinitely approach stress cone conical surface loaarithmic curve method.
Background technology
Hv cable termination joint is interconnective interface between cable and other electrical equipments outside, is also electric power
The weak spot of cable run, in the statistics that power cable breaks down, the fault rate of cable accessory is about 70%.China
High pressure and ultrahigh voltage cable fittings production technology lag behind its cable body always.The cable accessory of 110kV grade, domestic and enter
Mouth is also deposited, and domestic cable accessory is the most progressively monopolized the market, but the manufacturer that can produce 220kV cable accessory is few,
And adnexa key technology is grasped not enough.In recent years, ultrahigh voltage cable fittings with safe environment protection type as Main Trends of The Development, because of
This, eliminating oil-filled and sulfur hexafluoride gas cable accessory products becomes trend of the times.Some enterprises of Europe try hard to realize
The non-oil ultra high vacuum system of 500kV cable accessory.Chinese Enterprise is the most making great efforts to develop safe environment protection type product, the most can produce
The plug-in of 110KV grade and GIS dry outdoor terminal.Along with the increase of electric load, the raising of electric pressure and people's safety
The increase of environmental consciousness, the correlation technique of power cable is also being constantly updated, including supertension and extra-high-tension cable, is being superconducted
Cable, extra-high voltage direct-current cable, cable insulation new material, cable insulation thickness thinning, oversheath is non-halogen, terminal non-oil ultra high vacuum system,
Cable insulation life appraisal, high tension cable on-line monitoring and detection technique etc..The continuous progress of these new techniques, to power cable
Safe operation, ensure power supply reliability, reduce environmental pollution, reduce and manufacture and the aspect such as operating cost is all of great importance.
FInite Element (FEA, Finite Element Analysis) is as a kind of numerical value side needing whole region carries out subdivision
Method, at present in electromagnetic field analysis, is one of more advanced method, is highly effective when solving bounded problem.At present, number
Control lathe typically provides only straight line and circular interpolation processing mode, then uses straight line and circular arc to divide for non-rectilinear and circular curve
The method of section matching carries out interpolation.This method can cause when processing complex curve that data volume is big, low precision, feed speed not
All, program the series of problems such as complicated, necessarily crudy and processing cost are caused large effect.The most many scholars
It is sought for a kind of can complicated free type curve and surface infinitely being approached and the method for matching, in recent years, although take
Obtained some achievements in research, but not near preferable.
Summary of the invention
The technical problem to be solved in the present invention is: provide finite element method and the fortune of a kind of hv cable termination joint
Stress cone conical surface loaarithmic curve method is infinitely approached with arc-spline curve.By to tag stress cone conical surface logarithm
Curve uses arc-spline curve to carry out infinitely approaching, and establishes electric field limited element calculation model, by being calculated electricity
The Electric Field Distribution of the cable terminal fitting stress cone conical surface, is contrasted simulation result and theory analysis, checking terminal fitting electricity
The uniformity of field distribution and reasonability, to overcome the deficiencies in the prior art.
The technical scheme is that the research method of hv cable termination joint: by using multi-section circular arc batten bent
Line approaches and substitutes conical surface loaarithmic curve, sets up electric field limited element calculation model and calculates, comprises the following steps:
S1) according to hv cable termination joint two-dimensional axial symmetric overall structure, the overall structure of design semiconductive stress cone parts
Geomery, increasing around the thickness of insulating barrier including stress cone, stress cone axial length, stress cone conical surface pattern curve
Equation；
S2) arc-spline curve approximatioss is used to replace stress cone conical surface pattern curve: by plane curve according to certain step pitch
Discrete turn to one group of point range, then use this group point range of arc-spline curve matching, calculate every two sections of circular arc public affairs point of contacts successively and arrive
The bee line of virgin curveIf,More than given error amount, perform step S3), ifLess than or equal to given mistake
Difference, perform step S4)；
S3) then on virgin curve corresponding to inserting the new data point of people one at beeline, again use arc-spline curve matching, return
Step S2)；
S4) according to electric field distribution law and relevant criterion, try to achieve model parameter table, set up stress cone finite element two dimension and calculate mould
Type, performs step S5)；
S5) according to tag model, in conjunction with operating characteristic equation, the satisfied boundary condition of cable connector and specifically tie
Structure parameter, carries out FEM calculation to tag, and the electric field intensity local obtaining tag conical line is vowed
Spirogram and electric field intensity local cloud atlas, close on cable insulation and take a node at screen layer and be defined as starting point, with the conical surface
Curve is as mapping path, and along this path, the path of different nodal point separation start nodes is S, draws electric-field strength on this path
Degree and the relationship graph of S, verify uniformity and the reasonability of terminal fitting Electric Field Distribution by relationship graph.
The research method of the hv cable termination joint of above-mentioned hv cable termination joint,For arbitrarily small arithmetic number
Value and≤0.001mm。
Beneficial effects of the present invention is as follows: the present invention uses circular arc sample to tag stress cone conical surface loaarithmic curve
Bar curve has carried out infinitely approaching, and establishes electric field limited element calculation model, by being calculated tag stress
The Electric Field Distribution of the cone conical surface, and is contrasted simulation result and theory analysis, is met electric field distribution law, and i.e. electric field is
General goal is near metal screen layer cut-off port, and along with the increase of stress cone arcuate distance, electric field value is gradually decayed, to certain
After Yuan Chu, electric field is the most small.By uniformity and the reasonability of finite element analysis computation method validation terminal fitting Electric Field Distribution,
And effect is clearly.These conclusions are that the size of design terminal joint, the research of how further uniform electric field distribution are established
Determine basis and there is practical value.
Accompanying drawing explanation
Fig. 1 is the equivalent circuit diagram at hv cable termination of the present invention.
Fig. 2 is hv cable termination joint two-dimensional axial symmetric structural model figure of the present invention.
Fig. 3 is that arc-spline curve approaches loaarithmic curve schematic diagram.
Fig. 4 is terminal fitting finite element two dimension computation model figure of the present invention.
Fig. 5 is the electric field intensity Local Vector figure of terminal fitting conical line of the present invention.
Fig. 6 is the electric field intensity local cloud atlas of terminal fitting conical line of the present invention.
Fig. 7 is hv cable termination joint E, EX(electric field X-component of the present invention), EY(electric field Y-component) value is along conical line
Variation diagram.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish
Same or similar label represents same or similar element or has the element of same or like function.Below with reference to attached
The embodiment that figure describes is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
One, hv cable termination screen layer incision position electric field stress phenomenon analysis is first carried out:
Voltage Cable Lines Construction, in the region away from power cable terminal, all has (copper) of a ground connection outside high tension cable each phase core
Screen layer, forms radially-arranged electric field between conductor wire core and screen layer.The electric field of normal cable is only from (copper) wire edge
The electric lines of force of half radial direction (copper) screen layer, does not has the electric field (electric lines of force) that heart yearn is axial, is equivalent between shielding and cable conductor
One uniform capacitor plate, its Electric Field Distribution is the most uniform.Terminal at cable peels off outer jacket and the screen layer of certain size
After, change the original Electric Field Distribution of cable, create electric field distortion, more concentrate at shielding cut-off part electric lines of force.Ignoring
Inductance and when mainly considering electric capacity and resistance effect, its equivalent capacity can be reduced to by volumetric capacitanceAnd surface capacitanceGroup
The capacity chain become, insulator and insulated outer surface all can regard resistance (volume resistance asAnd sheet resistance) and electric capacity parallel connection
Equivalent circuit, by such equivalent method, cable termination use the lumped parameter of electric capacity and resistance by cable termination at
Recurrent circuit equally show, as shown in Figure 1.
Define according to electric capacity and resistance (admittance) and have:、、,
Then volume complex admittance is:, surface complex admittance is:.Formula
In,For conductive cable cores radius,For the insulation outer radius of cable,Specific insulation for dielectric.It is true
Empty dielectric constant,For the relative dielectric constant of medium,For cable insulation unit length sheet resistance,For cable list
Bit length surrounding media resistance,For the constant relevant with cable insulation surface condition.
The current potential at cable external shielding layer (ground connection) place is zero.It is set to insulating surface at initial point (screen layer edge) x
Voltage, the voltage (current potential) of metal screen layer is by coreThen it is believed that in Differential Elements dx, current potential increment isElectricity
Position rate of change isOr be the increment of unit length voltage, i.e. electric field intensity.Electric current in dx Differential ElementsCan be approximately considered
Definite value.IfShow that tangential field expression formula isIn formula, x represents insulation
The layer surface distance away from initial point (at screen layer cut-off port), negative sign represents that at this, tangential electric field and x are in opposite direction, and l represents shielding
The distance of cut-off point extremely insulation end points.When x is 0, hyperbolic cotangent takes maximum, and maximum field occurs in shielding cut-off
Point, i.e.Along with the increase of insulated lengths l, EtIn being gradually reduced trend, but when γ l >=1.5, cth
γ l levels off to 1, now increases insulated lengths, the electric field intensity of cable shield edge be there is no much impacts.
In order to improve the Electric Field Distribution of cable termination, the electric field stress reducing cable shield edge concentrates intensity, mesh
Before have employed multiple treatment measures: on cable insulation, 1. apply new insulating barrier, can increase equivalence insulation radius；②
Insulating surface at cable shield edge is coated with semiconductive varnish, it is possible to reduce the current potential near the impedance and screen layer on surface
Gradient；3. near screen layer, install bonding ring additional, increase radius of curvature；4. with stress cone, electric fields uniform is forced to be distributed
Deng.Conventional both at home and abroad is the 4. to plant method, the stress tube mainly made with room temperature liquid silicone rubber and firm silicone rubber material
And stress cone, but the product of both structural shapes can not meet the reliability and stability of longtime running.The present invention use into
Mouth high temperature vulcanized liquid silastic (LSR) material and semiconductive material, be simultaneously introduced the filler of high-k, application advanced person's
Finite Element Method is analyzed, designs and makes stress cone structural shape product, it is achieved that reliability of operation steady in a long-term with
And the optimum efficiency of end seals.
Two, the mathematical model of hv cable termination joint:
Cable termination and terminal fitting belong to axially symmetric structure, be modeled according to two-dimensional axial symmetric overall structure.Consider
High-tension line has power frequency work field intensity and impulse withstand voltage field intensity two class, two class fields during cable main insulation design, need to be considered simultaneously
By force, the design of terminal fitting stress cone has only to consider the power frequency work field intensity of insulation.Traditionally design semiconductive
The overall structure geomery of stress cone parts, mainly have stress cone increases the thickness around insulating barrier, stress cone axial lengthAnd stress cone conical surface shape curvilinear equation, shown in illustraton of model 2.
Wherein, ε1Cable body insulation relative dielectric constant；rcConductor layer outer radius；R body insulation outer radius；
U1Cable bears voltage, takes design voltage U according to various criterionAC；RnIncrease around insulating barrier outer radius；εnCable
Increase the relative dielectric constant around insulation；EtTangential field；EnNormal direction field intensity.
According to Fig. 2, owing to the conical surface of stress cone is connected with cable shield, current potential is zero, so the stress cone conical surface is one
Individual equipotential surface, takes up an official post at the stress cone conical surface and takes a bit, the conical surface is equipotential surface, therefore electric lines of force is orthogonal.For crossing F point
Tangent line and the angle of cut of cable radial direction, then the relation of tangential field and normal direction field intensity is, mistake
The normal direction field intensity of pointStill can approximate by cylindrical electric Field Calculation, two-layer grade-insulated cable is then had,
Wherein, two formulas merge integration and obtain, orderIt is a constant, i.e. along surface
Tangential electric field intensity be a constant, obtain conical surface loaarithmic curve equation:
(4)
Calculated the geomery of tag by the design of (1) (2) (3) expression formula, calculating according to Electric Field Distribution principle should
Power cone conical surface model is loaarithmic curve equation (4), and the conical surface loaarithmic curve that practical operation is shaped by lathe exists in processing
Difficulty, the cutter in Digit Control Machine Tool is can not to go feed with the TP of curve, and cutter can not be processed the most as requested
Curvilinear motion, at present the numerical control device of most Digit Control Machine Tools only possesses the function of linear interpolation and circular interpolation, for
Non-rectilinear and circular curve then use the method for straight line and circular arc piecewise fitting to carry out interpolation.This method is processing complex curve
Time can cause the series of problems such as data volume is big, low precision, feed speed uneven, programming is complicated, necessarily to crudy with add
Work cost causes large effect.Many people are sought for carrying out substituting preferable conical line with one or more broken line,
But it is unable to reach desirable and the standard-required of design.Here multi-section circular arc SPL is used infinitely to approach and substitute the conical surface
Loaarithmic curve, solves this difficult problem well, achieves preferable result.
Three, arc-spline curve is used infinitely to approach stress cone conical surface loaarithmic curve:
Owing to the numerical control device of the most most Digit Control Machine Tools only possesses the function of linear interpolation and circular interpolation, it is desirable to counting
Process arbitrary plane curve on control lathe, first they must be converted into straight line or circular arc, in certain accuracy rating, use
A series of straight lines or circular arc approach.When processing has the part of arbitrary plane curve on Digit Control Machine Tool, use and connect circular arc
Approach and have a following advantage than with multistage beeline approaching: the most all adjacent circular arc are tangent at junction point, thus become continuous
Circular arc, smooth without rib, and when using beeline approaching, corner angle occur at junction point；2. circular approximation relatively beeline approaching processor
Section is few, thus can reduce procedure quantity, improves working (machining) efficiency；3. circular approximation, its slope and radius of curvature are also very close to being forced
Near curve, and the radius of curvature of straight line is infinitely great, differs greatly.Just because of above-mentioned advantage, circular approximation arbitrary plane is bent
Line has become the problem that must solve in digital control processing.According to most literature retrieval, the processing plane curve overwhelming majority is adopted
Be twin-circular arc method.Use the method must first obtain the whole flex points on curve, be set to data point.And for space
Arbitrary curve in arbitrary plane, its flex point exact value is difficult to obtain.Therefore, existing twin-circular arc method is for solving sky
Between arbitrary curve approximation problem in arbitrary plane have certain limitation.
Here arc-spline curve approximatioss is used.First by any one plane curve, according to certain step pitch
Discrete turn to one group of point range, then use this group point range of arc-spline curve matching, calculate every two sections of circular arc public affairs point of contacts successively and arrive
The bee line of virgin curve.If distance is more than given error amount, then new corresponding to inserting people one at beeline on virgin curve
Data point, again uses arc-spline curve matching, then carries out Error subtraction scheme, until all of circular arc meets required precision.
It is embodied as follows: as it is shown on figure 3, set through data pointArc section be, through data pointArc section be
, the public point of contact of two arcs is.First askBeeline to virgin curveIf,>, hereFor arbitrarily small arithmetic number,
Then will correspond to the point of beeline on curvePeople's offset point sequence, matching again is inserted as new data point.Otherwise, detection
Two arc section public affairs point of contacts are to the distance of virgin curve below, until whole arc sections have detected.The curve so constituted is always
It is that single order is smooth, the multi-section circular arc of segmentation iso-curvature on body.So-called single order is smooth refers at junction point, and two adjacent circular arc have altogether
Same tangent line, first derivative is continuous, and second dervative exists but not necessarily continuous, and whole piece matched curve should keep the convex of former data point
Concavity, and without unnecessary flex point, such curve math is referred to asContinuously.
Four, finite element theory and implementation:
Cable termination and terminal fitting belong to axially symmetric structure, their Electric Field Distribution is also an axially symmetric field, it is assumed that axle
To and radially zero potential boundary definition is on the bottom cylindrical face or curved surface of a diameter of terminal body diameter several times, fixed by uniqueness
Reason, the conductor external electric field in model area uniquely determines, its Potential distribution meets Poisson's equation , due to conductor
Free charge is not had outward to be distributed (i.e.), Poisson's equation is reduced to Laplace's equation , i.e. ask in solving territory
Solve Laplace's equation.It is analyzed by static two dimensional field structure, but in Practical Project, often there is many unbounded electromagnetism
Problem, it is impossible to directly utilize FInite Element and calculate, often away from setting a current potential at the field domain of center or magnetic potential decays to zero
Artificial Boundaries, the size of bounds value can affect the precision of calculating, and (scope is the biggest, and precision is the lowest；Scope is the least, precision
The highest).Here as a example by 15kV high tension cable termination, 15kV belongs to mesolow electric pressure, takes according to electromagnetic field decay rule
Bounds value is 300mm, by national standard " GB/11017--2002 rated voltage U kV (Um=(1+10%) U XLPE
Insulated power cable and adnexa third portion thereof ", for U kV cable, test voltage U0=U/KV industrial frequency withstand voltage test electricity UAC
=4.5U0 KV(15kV High-voltage Cable Design voltage UAC =54kV), tolerance time 5 minutes.According to operating experience, line taking core cross section
Amass as 35mm2, cable terminal insulation layer length takes 70mm,Take 0.001mm, terminal and terminal fitting contain silicone rubber (), crosslinked polyethylene () and air () 3 kinds of materials, according to known relevant parameter and (1),
(2), (3) expression formula calculate the corresponding parameter in table 1, use arc-spline curve infinite approximation to set up FEM calculation mould
Type (such as Fig. 4) calculates.
Table 1 Model Parameter table
Potential distribution on the moldMeet two dimension Laplace's equation Boundary value problem such as formula (5) institute met
Showing, voltage unit is volt, and long measure is millimeter.
(5)
According to tag model, in conjunction with the operating characteristic equation of cable connector, satisfied boundary condition and concrete structure
Parameter, considers the performance of material simultaneously, and tag is carried out FEM calculation, obtains tag conical line
Electric field intensity Local Vector figure and electric field intensity local cloud atlas.
It is seen from fig 5 that either in straight line portion or the curved portion of stress cone, it can be seen that electric field line is the most vertical
Straight in the surface of stress cone, this is because the surface voltage of stress cone is all 0V, it is an equipotential plane.In electromagnetic field, etc.
Potential surface and electric field line such as grade are mutually perpendicular to, and direction of an electric field is pointed to stress cone surface by cable core.Electricity as can see from Figure 6
Field stress distribution on conical line.
It is located on cable insulation to close on and takes a node S at screen layer and be defined as starting point, using conical line as mapping
Path, along this path, the path of different nodal point separation start nodes is S(starting point S=0.0000mm), show that this path powers on
Field intensity and relation such as Fig. 7 and Biao 2 of S.
Table 2 takes the field value (joint near screen layer incision, minima and maximum that key node on path is corresponding
Point).
According to Fig. 7 and Biao 2 it can be seen that tag electric field maximum 10433V/mm is at metal screen layer otch
Near Chu, (maximum of conventional design silicone rubber outer surface is tangential much smaller than 25kV/mm for internal maximum field intensity 7678V/mm of cone
Electric field intensity controlling value), silicone rubber and crosslinked polyethylene interface field intensity 10433V/mm are much smaller than 25kV/mm (conventional design control
Value processed), the maximum tangential electric field intensity of silicone rubber outer surface is less than 22kV/mm, much smaller than silastic surface flashover electric field intensity,
Illustrate that the scheme designed is rational, feasible.Generally speaking, cable termination stress cone improve electric field at cable termination point
Cloth, makes electric field more uniform, local maximum does not occur, it is to avoid the generation of the sliding elephant that flashes, and then decreases the product of accident
Raw, optimize being uniformly distributed of electric field at cable termination, technical specification realizes and has exceeded well over the target in table 3.From emulation knot
Fruit and theory analysis are contrasted, it is also possible to continue to adjust (minimizing)Value (Take less value such as 0.0005mm etc.),
Use arc-spline curve infinite approximation to approach loaarithmic curve again, set up limited element calculation model and calculate, make electric field
Distribution progressivelyes reach preferable standard-required.
Table 3 test data with and technical standard:
Claims (2)
1. the research method of hv cable termination joint: bent by using multi-section circular arc SPL to approach and substitute conical surface logarithm
Line, sets up electric field limited element calculation model and calculates, it is characterised in that comprise the following steps:
S1) according to hv cable termination joint two-dimensional axial symmetric overall structure, the overall structure of design semiconductive stress cone parts
Geomery, increasing around the thickness of insulating barrier including stress cone, stress cone axial length, stress cone conical surface pattern curve
Equation；
S2) arc-spline curve approximatioss is used to replace stress cone conical surface pattern curve: by plane curve according to certain step pitch
Discrete turn to one group of point range, then use this group point range of arc-spline curve matching, calculate every two sections of circular arc public affairs point of contacts successively and arrive
The bee line of virgin curveIf,More than given error amount, perform step S3), ifLess than or equal to given mistake
Difference, perform step S4)；
S3) then on virgin curve corresponding to inserting the new data point of people one at beeline, again use arc-spline curve matching, return
Step S2)；
S4) according to electric field distribution law and relevant criterion, try to achieve model parameter table, set up stress cone finite element two dimension and calculate mould
Type, performs step S5)；
S5) according to tag model, in conjunction with operating characteristic equation, the satisfied boundary condition of cable connector and specifically tie
Structure parameter, carries out FEM calculation to tag, and the electric field intensity local obtaining tag conical line is vowed
Spirogram and electric field intensity local cloud atlas, close on cable insulation and take a node at screen layer and be defined as starting point, with the conical surface
Curve is as mapping path, and along this path, the path of different nodal point separation start nodes is S, draws electric-field strength on this path
Degree and the relationship graph of S, verify uniformity and the reasonability of terminal fitting Electric Field Distribution by relationship graph.
The research method of hv cable termination joint the most according to claim 1, it is characterised in that:For arbitrarily small just
Real number value and≤0.001mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610184041.XA CN105844029B (en) | 2016-03-29 | 2016-03-29 | The research method of hv cable termination connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610184041.XA CN105844029B (en) | 2016-03-29 | 2016-03-29 | The research method of hv cable termination connector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105844029A true CN105844029A (en) | 2016-08-10 |
| CN105844029B CN105844029B (en) | 2019-01-01 |
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| CN106099826A (en) * | 2016-08-30 | 2016-11-09 | 南京南瑞集团公司 | Extruded type flexible direct current cable termination stress cone structure |
| CN106934152A (en) * | 2017-03-13 | 2017-07-07 | 顺德职业技术学院 | The modeling method of many stress interface accessory devices of high-tension cable |
| CN107272596A (en) * | 2017-08-07 | 2017-10-20 | 广东鼎泰高科精工科技有限公司 | A kind of processing method of forming cutter contour line |
| CN107769148A (en) * | 2017-11-24 | 2018-03-06 | 广东电网有限责任公司珠海供电局 | A kind of design method of high-voltage alternating cable transition joint stress cone |
| CN109388831A (en) * | 2017-08-10 | 2019-02-26 | 广州敬道电气技术有限公司 | The calculation and analysis methods of more stress cone tags |
| CN112651159A (en) * | 2020-12-25 | 2021-04-13 | 广东电网有限责任公司电力科学研究院 | High-voltage cross-connection cable joint transient electric stress assessment method |
| CN113280725A (en) * | 2021-03-09 | 2021-08-20 | 歌尔微电子股份有限公司 | Quartz crystal thickness detection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106099826A (en) * | 2016-08-30 | 2016-11-09 | 南京南瑞集团公司 | Extruded type flexible direct current cable termination stress cone structure |
| CN106934152A (en) * | 2017-03-13 | 2017-07-07 | 顺德职业技术学院 | The modeling method of many stress interface accessory devices of high-tension cable |
| CN107272596A (en) * | 2017-08-07 | 2017-10-20 | 广东鼎泰高科精工科技有限公司 | A kind of processing method of forming cutter contour line |
| CN109388831A (en) * | 2017-08-10 | 2019-02-26 | 广州敬道电气技术有限公司 | The calculation and analysis methods of more stress cone tags |
| CN107769148A (en) * | 2017-11-24 | 2018-03-06 | 广东电网有限责任公司珠海供电局 | A kind of design method of high-voltage alternating cable transition joint stress cone |
| CN112651159A (en) * | 2020-12-25 | 2021-04-13 | 广东电网有限责任公司电力科学研究院 | High-voltage cross-connection cable joint transient electric stress assessment method |
| CN113280725A (en) * | 2021-03-09 | 2021-08-20 | 歌尔微电子股份有限公司 | Quartz crystal thickness detection device |
| CN113280725B (en) * | 2021-03-09 | 2022-10-28 | 歌尔微电子股份有限公司 | Quartz crystal thickness detection device |
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