CN110210172A - A kind of band arrester line live-line work Electric Field Simulation calculation method - Google Patents
A kind of band arrester line live-line work Electric Field Simulation calculation method Download PDFInfo
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Abstract
The invention discloses a kind of band arrester line live-line work Electric Field Simulation calculation methods, comprising the following steps: 1) establishes steel tower-arrester-conducting wire-insulator-person of low position model；2) air balls and air cube are covered respectively on model and person of low position；3) basic data of line voltage distribution grade, steel tower relevant device is determined；4) boundary condition is set, cast material attribute is assigned；5) voltage of grid division and computing electric power line；6) electric field strength and field distribution around arrester are calculated；7) intuitive to analyze arrester surrounding electric field and the influence to operating personnel according to the electric field around the arrester calculated in step 6 as a result, be sliced, drawn.Electric field conditions around method analysis arrester of the invention, so that it is determined that the influence of arrester operation is removed to electrification, so that livewire work becomes feasible.It can reasonably plan that operation access lane and method for dismounting improve the efficiency of operation.
Description
Technical field
The present invention relates to a kind of band arrester line live-line work Electric Field Simulation calculation methods, belong to livewire work emulation skill
Art field.
Background technique
It yet there are no the pertinent literature influenced about overhead transmission line arrester electric field on livewire work both at home and abroad at present,
It is had no on 500kV, 220kV grade band arrester overhead transmission line and carries out livewire work research or report, corresponding technology ginseng
Number, operation invention and operation mode also need to carry out numerous studies and field application.
China carries out livewire work technical research and application has more than 60 years history.So far all kinds of electrifications have been set up to make
Industry professional association has worked out livewire work technology series standard, reinforces the exploitation of livewire work theoretical research and Work tool, and infuses
Heave hand electricity operating personnel's skills training work, acquires a great achievement in transmission & distribution power transformation livewire work field, has accumulated abundant warp
It tests.Transmission of electricity livewire work refers generally to the electrification defect elimination carried out on the transmission line of electricity of 110kV and above, hidden troubles removing
Equal work.Ongoing invent from operation domestic at present can be roughly divided into five major class: charged for replacement monolithic or whole string strain insulator are exhausted
Edge, charged for replacement monolithic or whole string forthright insulator, charged for replacement or fitting and attachment, electrification repairing grounded-line or more
Change the live detections such as drainage thread, electrification zero-detection or the close sampling of salt.Transmission of electricity livewire work can be divided into earth potential working, intermediate potential is made
Industry and equipotential live line work, 110kV route enter electric field by soft, hard ladder, and 220kV route can be by insulator chain or soft, hard
Ladder enters electric field, and 500kV route can enter electric field by insulator chain, hanging basket or soft, hard ladder.For conventional 110kV and
The transmission line of electricity of above has been carried out livewire work invention research abundant and application both at home and abroad, has been achieved rich
Rich achievement, while having worked out under each voltage class, the standardized work guiding book of different livewire work inventions has developed into
The livewire work equipment of set, Work tool etc., for livewire work on conventional aerial transmission line of electricity, have formed the technology of comparative maturity
System.
The research influenced both at home and abroad on arrester on livewire work at present is less, corresponding technical parameter, operation invent and
Operation mode also needs to carry out numerous studies and field application.
Because quality during overhead transmission line arrester design itself, manufacturing technology level and installation etc. is real
Border Recessive elementS causes overhead transmission line arrester will be inevitable during electrification hanging net operation long-term from now on
There are defect or potential faults, the critical hidden danger that the influence route of appearance operates normally must carry out Processing for removing in time, otherwise
Hidden danger, which further develops, will likely cause line fault or fault spread.But as arrester is on overhead transmission line road
Be widely applied, overhead transmission line insulator surrounding space structure changes: the structure of arrester makes the surrounding electric field distribution hair that insulate
It is raw to change, so that livewire work is also influenced accordingly.For guarantee actual track live-working safety gap reliability, because
This passes through a kind of band arrester route band it is necessary to combine influence research of the actual track engineering expansion arrester to livewire work
Electric operation Electric Field Simulation calculation method is come the case where studying arrester surrounding electric field, the reality of arrester operation is removed in power-assisted electrification
Row.
Summary of the invention
The technical problem to be solved by the present invention is providing a kind of band arrester line live-line work Electric Field Simulation calculating side
Method, to solve above-mentioned problems of the prior art.
The technical scheme adopted by the invention is as follows: a kind of band arrester line live-line work Electric Field Simulation calculation method, the party
Method the following steps are included:
Step 1 establishes steel tower-arrester-conducting wire-insulator-person of low position model using three-dimensional software；
Step 2 covers an air balls on entire model, and a lesser air cube is covered on person of low position；
Step 3, the basic data for determining line voltage distribution grade, steel tower relevant device, equipment include corresponding voltage grade
Wineglass tower, Gan Zita, double back tower and the matched conducting wire of shaft tower, arrester, insulator and fitting, basic data include bar
The size and installation site of tower, conducting wire, arrester, insulator, fitting；
Step 4, setting boundary condition, assign cast material attribute；
The voltage of step 5, grid division and computing electric power line；
Electric field strength and field distribution around step 6, calculating arrester；
Step 7, according to the electric field around the arrester calculated in step 6 as a result, being sliced, being drawn, analysis is kept away
Thunder device surrounding electric field, and the influence to operating personnel.
According to the different voltages grade to be emulated in step 1, the steel tower-arrester-for establishing different type and size is led
Line-insulator-person of low position's model, preference pattern type are that stable state builds steel tower transmission of electricity electric field model.
Covering a radius to steel tower-arrester-conducting wire-insulator-person of low position's model of established different type and size is
The ball of 60m, then a cuboid is covered on person of low position's model.
Different types of steel tower-arrester-conducting wire-insulator-person of low position's model voltage class and basis are determined in step 3
Data: 500kV route - wineglass tower+band supporting element gap arrester, 500kV route - double+band supporting element gap are kept away
Between the dry subtype anchor support of thunder device, 500kV route -+band supporting element gap arrester, 220kV route - wineglass tower+band supporting element
Gap arrester, 220kV route - double+band supporting element gap arrester, the dry subtype anchor support of 220kV route -+band branch
Support member gap arrester, 220kV route - wineglass tower+band air gap arrester, 220kV route - double+band air
The dry subtype anchor support+band air gap arrester of gap arrester, 220kV route -.
Boundary condition is set for ground electrode ground connection, infinite point current potential is zero in step 4；Assign steel tower, model power line
Material properties are that ferromagnetic material, insulator and arrester material are ceramic material, and enveloping air material is air.
Thick gridding subdivision is carried out in step 5 to overall model, steel tower-conducting wire-insulator-arrester model is carried out
Tessellated mesh subdivision, to person of low position's model into extremely careful gridding subdivision；According to virtual voltage situation to the voltage of transmission line of electricity
It is calculated and is inputted., a phase conductor, grading ring, shading ring and high-voltage end fitting load 500kV are exchanged by taking 500kV as an example
Route highest runs phase voltage amplitudeOther two-phases then on-load voltage-Um/2=-
224kV。
On the basis of the model for completing gridding subdivision in step 6 in front, the calculating of electric field mould is carried out to model, completes to keep away
The calculating of thunder device surrounding electric field.
The middle selection of step 7 is sliced, and longitudinal section position is selected to be placed exactly in the sectional position of the middle of person of low position's model
Model is sliced, selection is able to reflect in electric field intensity map more than the parameter logistic ruler of half difference electric field grade distribution, is drawn
Electric field intensity map around arrester, the case where electric field is intuitively analyzed by electric field intensity map and the influence to livewire work personnel.
Beneficial effects of the present invention: compared with prior art, effect of the invention is as follows:
(1) present invention is by the electric field around simulation calculation overhead transmission line arrester, according to the different voltages built
Steel tower-arrester-conducting wire-insulator-person of low position's model of grade effectively calculates the electric field in overhead transmission line around arrester,
And the electric field conditions around operating personnel are drawn, so that it is determined that electric field conditions when arrester removes operation are carried out, so that band
Electricity is removed arrester and can be gone on smoothly, and livewire work efficiency is improved；
(2) insulation is realized using slide rail suspension insulator string, telescopic rod connecting insulator string, Potential distribution adjustment ring
Adjustment of the son apart from shaft tower position, height and position and Potential distribution, and cooperate telescopic analog conducting wire, realize insulator chain
The simulation of the insulator chain of different service conditions and different model reduces simulated cost, and easy to adjust, operation is easy；
(3) insulator heat generation parameter is more fully obtained.By obtaining the leakage current of insulator, extract in leakage current
Capacitive component and resistive component obtain heat generation and infrared imaging of the insulator along string in conjunction with the Potential distribution of insulator
Rule；
(4) the multi-faceted infrared imaging image for obtaining insulator chain of multi-angle, by being obtained under multi-angle and different distance
The infrared imaging image of insulator chain.
Detailed description of the invention
Fig. 1 is flow diagram of the invention；
Fig. 2 is earth potential working position view；
Fig. 3 is 1 space electric field cloud charts of earth potential working position；
Fig. 4 is 1 human body electric field cloud charts of earth potential working position；
Fig. 5 is 500kV route - wineglass tower+band supporting element gap arrester simulating scenes figure；
Fig. 6 is 500kV route - double+band supporting element gap arrester simulating scenes figure；
Fig. 7 is 500kV route - anchor support+band supporting element gap arrester simulating scenes figure；
Fig. 8 is 220kV route - wineglass tower+band supporting element gap arrester simulating scenes figure；
Fig. 9 is 220kV route - double+band supporting element gap arrester simulating scenes figure；
Figure 10 is 220kV route - anchor support+band supporting element gap arrester simulating scenes figure；
Figure 11 is 220kV route - wineglass tower+band air gap arrester simulating scenes figure；
Figure 12 is 220kV route - double+band air gap arrester simulating scenes figure；
Figure 13 is 220kV route - anchor support+band air gap arrester simulating scenes figure.
Specific embodiment
With reference to the accompanying drawing and the present invention is described further in specific embodiment.
Embodiment 1: as shown in figures 1-13, a kind of band arrester line live-line work Electric Field Simulation calculation method, this method
The following steps are included:
Step 1 establishes steel tower-arrester-conducting wire-insulator-person of low position using three-dimensional software (SolidWorks software)
Model: according to the different voltages grade to be emulated, steel tower-arrester-conducting wire-insulator-of different type and size is established
Person of low position's model, preference pattern type are that stable state builds steel tower transmission of electricity electric field model；
Step 2 covers an air balls on entire model, and a lesser air cube is covered on person of low position: to being built
Steel tower-arrester-conducting wire-insulator-person of low position's model of vertical different type and size covers the ball that a radius is 60m, then small
A cuboid is covered on people's model；
Step 3 determines different types of steel tower-arrester-conducting wire-insulator-person of low position's model voltage class and basis
Data, equipment include wineglass tower, Gan Zita, double back tower and the matched conducting wire of shaft tower, arrester, insulation of corresponding voltage grade
Son and fitting, basic data include the size and installation site of shaft tower, conducting wire, arrester, insulator, fitting, specifically:
500kV route - wineglass tower+band supporting element gap arrester, 500kV route - double+band supporting element gap arrester,
The dry subtype anchor support of 500kV route -+band supporting element gap arrester, 220kV route - wineglass tower+band supporting element gap are lightning-arrest
Between device, 220kV route - double+band supporting element gap arrester, the dry subtype anchor support+band supporting element of 220kV route -
Gap arrester, 220kV route - wineglass tower+band air gap arrester, 220kV route - double+band the air gap are kept away
The dry subtype anchor support+band air gap arrester of thunder device, 220kV route -；
Step 4, setting boundary condition are ground electrode ground connection, and infinite point current potential is zero；Assign steel tower, model power line material
Material attribute is that ferromagnetic material, insulator and arrester material are ceramic material, and enveloping air material is air；
Step 5 carries out thick gridding subdivision to overall model, carries out to steel tower-conducting wire-insulator-arrester model
Tessellated mesh subdivision, to person of low position's model into extremely careful gridding subdivision；According to virtual voltage situation to the voltage of transmission line of electricity
It is calculated and is inputted, 500kV AC line is loaded to a phase conductor, grading ring, shading ring and high-voltage end fitting by taking 500kV as an example
Road highest runs phase voltage amplitudeOther two-phases then on-load voltage-Um/2=-
224kV；
Step 6, in front complete gridding subdivision model on the basis of, to model carry out electric field mould calculating, complete to keep away
The calculating of thunder device surrounding electric field；
Step 7, according to the electric field around the arrester calculated in step 6 as a result, being sliced, being drawn, analysis is kept away
Thunder device surrounding electric field, and the influence to operating personnel；
Selection slice, the sectional position for selecting longitudinal section position to be placed exactly in the middle of person of low position's model carry out model
Slice, selection are able to reflect in electric field intensity map more than the parameter logistic ruler of half difference electric field grade distribution, draw around arrester
Electric field intensity map, the case where electric field is intuitively analyzed by electric field intensity map and the influence to livewire work personnel.
The present invention is by carrying out the electric field around calculating arrester to electric transmission line lightning arrester electric field in COMSOL software
Situation analyzes the electric field conditions around arrester using the cloud charts of the model slice draw electric field of software accordingly, from
And determine the influence that arrester operation is removed to electrification, so that livewire work becomes feasible, it can reasonably plan that operation passes in and out
Path and method for dismounting improve the efficiency of operation.It theoretically solves the problems, such as some livewire work by simulation calculation, has
There is important engineering significance.
Example: 500kV wineglass tower-arrester-insulator-conducting wire-person of low position's model arrester electric Field Calculation
We have chosen multiple typical operation positions on shaft tower, and each position description is as follows:
The position that 1-people of position station is on shaft tower and conducting wire is in same level；
2-people of position stands on shaft tower, at 3m above the horizontal direction where lower phase conductor；
3-people of position stands on shaft tower, in distance below phase conductor at 3m；
4-people of position stands on shaft tower, in distance above phase conductor at 3m；
5-people of position stands on shaft tower, is located at middle phase conductor position directly above；
Earth potential working position view is as shown in Figure 2:
Earth potential working locational space field distribution and human body surface field strength distribution cloud atlas is calculated according to above-mentioned steps
As shown in Figure 3-4.
1 different work position operating personnel's filed intensity on body surface (kV/m) of table
| Field strength | Position 1 | Position 2 | Position 3 | Position 4 | Position 5 |
| The crown | 100 | 120 | 140 | 180 | 240 |
| Face | 40~60 | 38~80 | 34~70 | 30~50 | 60~80 |
| Chest | 31~36 | 20~2 | 20~25 | 20~28 | 35~58 |
| Hand point | 160 | 150 | 120 | 150 | 180 |
| Tiptoe | 100 | 80 | 40 | 120 | 160 |
Available from the calculated result of ground potential: operating personnel is during stepping on tower, nearest with phase conductor distance
Field strength is larger at position.The operating personnel crown, hand point, shoulder and the lesser position field strength of tiptoe iso-curvature radius are larger, and make
The field strength of industry personnel's thorax abdomen is smaller, and distribution uniform.And when operating personnel is in inside the framework of shaft tower, due to
The screen effect of shaft tower makes operating personnel's filed intensity on body surface very little at this time.Therefore, in Deng Ta or operating process, operating personnel is not
Shaft tower framework should be stretched out in the positions such as head, hand, in order to avoid cause tip to be distorted surrounding space electric field, to threaten operation people
Member's safety.It needs that different methods is taken to carry out operation in different positions.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Within protection scope of the present invention, therefore, protection scope of the present invention should be based on the protection scope of the described claims lid.
Claims (8)
1. a kind of band arrester line live-line work Electric Field Simulation calculation method, it is characterised in that: method includes the following steps:
Step 1 establishes steel tower-arrester-conducting wire-insulator-person of low position model using three-dimensional software；
Step 2 covers an air balls on entire model, and an air cube is covered on person of low position；
Step 3, the basic data for determining line voltage distribution grade, steel tower relevant device, equipment include the wineglass of corresponding voltage grade
Tower, Gan Zita, double back tower and the matched conducting wire of shaft tower, arrester, insulator and fitting, basic data include shaft tower, lead
The size and installation site of line, arrester, insulator, fitting)；
Step 4, setting boundary condition, assign cast material attribute；
The voltage of step 5, grid division and computing electric power line；
Electric field strength and field distribution around step 6, calculating arrester；
Step 7, according to the electric field around the arrester calculated in step 6 as a result, be sliced, drawn, analyze arrester
Surrounding electric field, and the influence to operating personnel.
2. a kind of band arrester line live-line work Electric Field Simulation calculation method according to claim 1, it is characterised in that:
According to the different voltages grade to be emulated in step 1, steel tower-arrester-conducting wire-insulation of different type and size is established
Son-person of low position's model, preference pattern type are that stable state builds steel tower transmission of electricity electric field model.
3. a kind of band arrester line live-line work Electric Field Simulation calculation method according to claim 2, it is characterised in that:
The ball that one radius is 60m is covered to steel tower-arrester-conducting wire-insulator-person of low position's model of established different type and size,
A cuboid is covered on person of low position's model again.
4. a kind of band arrester line live-line work Electric Field Simulation calculation method according to claim 1, it is characterised in that:
Determining different types of steel tower-arrester-conducting wire-insulator-person of low position's model voltage class and basic data in step 3: 500
KV route - wineglass tower+band supporting element gap arrester, 500 kV route - doubles+band supporting element gap arrester, 500
The dry subtype anchor support of kV route -+band supporting element gap arrester, 220 kV route - wineglass towers+band supporting element gap are lightning-arrest
Device, 220 kV route - doubles+band supporting element gap arrester, the dry subtype anchor support+band supporting element of 220 kV route -
Gap arrester, 220kV route - wineglass tower+band air gap arrester, 220kV route - double+band the air gap
The dry subtype anchor support+band air gap arrester of arrester, 220kV route -.
5. a kind of band arrester line live-line work Electric Field Simulation calculation method according to claim 1, it is characterised in that:
Boundary condition is set for ground electrode ground connection, infinite point current potential is zero in step 4；Assign steel tower, model power line material properties
It is ceramic material for ferromagnetic material, insulator and arrester material, enveloping air material is air.
6. a kind of band arrester line live-line work Electric Field Simulation calculation method according to claim 1, it is characterised in that:
Thick gridding subdivision is carried out in step 5 to overall model, tessellated mesh is carried out to steel tower-conducting wire-insulator-arrester model
Subdivision, to person of low position's model into extremely careful gridding subdivision；It is calculated according to voltage of the virtual voltage situation to transmission line of electricity
And it inputs.
7. a kind of band arrester line live-line work Electric Field Simulation calculation method according to claim 1, it is characterised in that:
On the basis of the model for completing gridding subdivision in step 6 in front, the calculating of electric field mould is carried out to model, is completed around arrester
The calculating of electric field.
8. a kind of band arrester line live-line work Electric Field Simulation calculation method according to claim 1, it is characterised in that:
The middle selection of step 7 is sliced, select longitudinal section position be placed exactly in the sectional position of the middle of person of low position's model to model into
Row slice, selection are able to reflect in electric field intensity map more than the parameter logistic ruler of half difference electric field grade distribution, draw arrester week
The electric field intensity map enclosed, the case where electric field is intuitively analyzed by electric field intensity map and the influence to livewire work personnel.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112906257A (en) * | 2021-01-15 | 2021-06-04 | 国网江苏省电力有限公司无锡供电分公司 | Cable terminal live-line work risk assessment method based on human body surface electric field |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005172734A (en) * | 2003-12-15 | 2005-06-30 | Tokyo Electric Power Co Inc:The | Easy impulse testing device |
| CN101714748A (en) * | 2009-10-12 | 2010-05-26 | 中国电力科学研究院 | Method and system for determining serial and parallel connection gaps of overhead power transmission line insulators |
| US10212592B2 (en) * | 2017-07-17 | 2019-02-19 | Shenzhen Essentials Technology Limited | Systems and methods for keyword—and location-based user authentication |
| CN109378144A (en) * | 2018-10-19 | 2019-02-22 | 广州中光电气科技有限公司 | A kind of combinational gap device and preparation method thereof changing gapless arrestyer protection mechanism |
-
2019
- 2019-06-19 CN CN201910531560.2A patent/CN110210172A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005172734A (en) * | 2003-12-15 | 2005-06-30 | Tokyo Electric Power Co Inc:The | Easy impulse testing device |
| CN101714748A (en) * | 2009-10-12 | 2010-05-26 | 中国电力科学研究院 | Method and system for determining serial and parallel connection gaps of overhead power transmission line insulators |
| US10212592B2 (en) * | 2017-07-17 | 2019-02-19 | Shenzhen Essentials Technology Limited | Systems and methods for keyword—and location-based user authentication |
| CN109378144A (en) * | 2018-10-19 | 2019-02-22 | 广州中光电气科技有限公司 | A kind of combinational gap device and preparation method thereof changing gapless arrestyer protection mechanism |
Non-Patent Citations (1)
| Title |
|---|
| 王时春 等: "《220kV双回塔检修避雷器带电作业电场仿真研究》", 《JOURNAL OF ELECTRICAL ENGINEERING》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112906257A (en) * | 2021-01-15 | 2021-06-04 | 国网江苏省电力有限公司无锡供电分公司 | Cable terminal live-line work risk assessment method based on human body surface electric field |
| CN112906257B (en) * | 2021-01-15 | 2022-08-05 | 国网江苏省电力有限公司无锡供电分公司 | Cable terminal live working risk assessment method based on human body surface electric field |
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Application publication date: 20190906 |