CN105138760A - Ultrahigh-voltage transmission line electromagnetic field modeling method - Google Patents
Ultrahigh-voltage transmission line electromagnetic field modeling method Download PDFInfo
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- CN105138760A CN105138760A CN201510507363.9A CN201510507363A CN105138760A CN 105138760 A CN105138760 A CN 105138760A CN 201510507363 A CN201510507363 A CN 201510507363A CN 105138760 A CN105138760 A CN 105138760A
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Abstract
The invention discloses an ultrahigh-voltage transmission line electromagnetic field modeling method comprising the following steps: S1, selecting a HIFREQ module and setting a soil model; S2, setting corresponding voltage and current excitations as ABC phase voltage excitation and current source excitation; S3, setting the conductor type and coating type, editing the conductor type and determining the corresponding number according to a used conductor, and editing and adding the corresponding coating type and determining the corresponding number if the surface of the conductor has a coating; S4, using a SesCAD to build a model according to the actual conditions, setting parameters, and adding an observation line; and S5, calculating the electromagnetic field, and drawing an electromagnetic field curve offline. A CDEGS ultrahigh-voltage transmission line modeling calculation method is used in the invention, and an accurate offline electromagnetic field distribution calculation result can be obtained. The method has the advantages of easy operation, high precision, excellent performance, and high reliability.
Description
Technical field
The present invention relates to power transmission technology field, particularly relate to a kind of UHV transmission line electromagnetic field modeling method.
Background technology
The electromagnetic environment of 1000kV transmission line of electricity mainly comprises several aspects such as Electric Field Distribution, radio interference and audible noise, specifies: 1000kV circuit maximum field strength limit value under the line of residential block is 7kV/m according to " 1000kV overhead transmission line design specifications " (GB50665-2011); For non-residential areas, under line, maximum field intensity presses 10kV/m control.When circuit closes on residential architecture, residential architecture position should more than 4kV/m apart from the maximum field intensity that do not distort of ground 1.5m eminence, and this is also the principal element determining line corridor width.Therefore need to calculate accordingly, but there is no a set of precisely reliable computing method at present.
Summary of the invention
Because the above-mentioned defect of prior art, the invention provides a kind of UHV transmission line electromagnetic field modeling method, this method utilizes the UHV transmission line Modeling Calculation method of CDEGS, can obtain magnetic distribution result of calculation under line accurately, it is easy and simple to handle, precision is high, excellent performance, good reliability.
For achieving the above object, the invention provides a kind of UHV transmission line electromagnetic field modeling method, comprise the following steps:
Step S1, selection HIFREQ module, arrange soil model;
Step S2, arranging relevant voltage, current excitation, is the excitation of ABC phase voltage and Impetus of Current Source;
Step S3, arrange conductor, types of coatings, determine corresponding numbering according to use conductor editor's types of conductors, if there is conductive surface have coating, editor adds corresponding types of coatings and also determines corresponding numbering;
Step S4, according to reality use SesCAD build model, line parameter of going forward side by side arrange, add the line of observation;
Step S5, computational EM waves, carry out the drafting of electromagnetic field curve under line.
Further, in described step S2, the excitation types of ABC phase voltage excitation is GPR-electromotive force, and amplitude is phase voltage amplitude and angle.
Further, in described step S2, the excitation types of Impetus of Current Source is for being communicated with, and current amplitude is the electric current on every root divided conductor.
Further, use SesCAD to create lead model according to the division number of phase spacing and wire, model, ground clearance in described step S4, in the middle of wire, two ground connection shaft towers are built at corresponding span place, and place ground wire.
Further, in described step S4, the motivational techniques of model are 0.5m for respectively adding a bit of conductor length in corresponding wire front and back end, one section of voltage drive being set to three-phase, one section of current excitation being set to three-phase, and it is online lower to 1.5m place, the ground interpolation line of observation, confirm laggard row operation computational EM waves, carry out the drafting of electromagnetic field curve under line.
Beneficial effect of the present invention:
The present invention utilizes the UHV transmission line Modeling Calculation method of CDEGS, and can obtain magnetic distribution result of calculation under line accurately, it is easy and simple to handle, precision is high, excellent performance, good reliability.
Be described further below with reference to the technique effect of accompanying drawing to design of the present invention, concrete structure and generation, to understand object of the present invention, characteristic sum effect fully.
Accompanying drawing explanation
Fig. 1 is method flow diagram of the present invention;
Fig. 2 is that excitation of the present invention arranges figure;
Fig. 3 is model planimetric map of the present invention;
Fig. 4 is model orthogonal projection of the present invention;
Fig. 5 is that the model calculation of the present invention is drawn;
Fig. 6 is typical tower structure schematic diagram.
Embodiment
As shown in Figure 1, the invention provides a kind of UHV transmission line electromagnetic field modeling method, it is characterized in that, comprise the following steps:
Step S1, startup CDEGS input pattern, select HIFREQ module, arrange soil model;
Step S2, arranging relevant voltage, current excitation, is the excitation of ABC phase voltage and Impetus of Current Source;
Step S3, arrange conductor, types of coatings, determine corresponding numbering according to use conductor editor's types of conductors, if there is conductive surface have coating, editor adds corresponding types of coatings and also determines corresponding numbering;
Step S4, according to reality use SesCAD build model, line parameter of going forward side by side arrange, add the line of observation;
Step S5, computational EM waves, carry out the drafting of electromagnetic field curve under line.
As shown in Figure 2, in described step S2, the excitation types of ABC phase voltage excitation is GPR-electromotive force, and amplitude is phase voltage amplitude and angle, and in described step S2, the excitation types of Impetus of Current Source is for being communicated with, and current amplitude is the electric current on every root divided conductor.
As shown in Figure 3, SesCAD is used to create lead model according to the division number (extra-high-voltage alternating current is generally eight divisions) of phase spacing and wire, model, ground clearance in described step S4, be illustrated as extra-high voltage typical case double eight split conductor model, the types of conductors that types of conductors is arranged according to step S3 is selected, in the middle of wire, two ground connection shaft towers (being set to T-shaped straight line as figure Tower Model simplifies) are built at corresponding span place, and place ground wire).Points for attention set up by model: be evenly distributed for ensureing to calculate field intensity in shelves, reduce the impact of end conductor electric field distortion, conductor length is arranged comparatively greatly as far as possible, and (theory is tending towards infinitely great, actual setting can be set to several kilometers), calculating position is in the middle of two ground connection shaft towers, it is stretching that model can be reduced to wire, and also can arrange corresponding size sag according to actual, result is more accurate.This modeling method also can be carried out electric field intensity under many times adjacent lines routes and be calculated, and meets Regulations with field intensity under verifying line.
As shown in Figure 4, in described step S4, the motivational techniques of model are 0.5m for respectively adding a bit of conductor length in corresponding wire front and back end, one section of voltage drive being set to three-phase, one section of current excitation being set to three-phase, according to actual phase sequence distribution situation, different phase conductor is arranged, and the line of observation added apart from 1.5m place, ground under calculating shelves line perpendicular to circuit, line of observation start-stop is corresponding width of corridor, confirm laggard row operation computational EM waves, carry out the drafting of electromagnetic field curve under line, obtain in certain width of corridor apart from ground 1.5m electric-field intensity distribution.
As shown in Figure 5, for extra-high voltage double difference exhales electric-field intensity distribution computation structure result example in high situation, result is visual in image, conveniently determines to meet the width of corridor that Regulations electric field intensity requires.
This modeling example adopts parameter as follows:
Wire: 8 × JL/G1A-630/45, heading spacing 0.4m; Ground wire: JLB20A-240
Soil resistivity: 100 Europe/rice
Electric pressure: 1000kV, current amplitude 3680A (namely on every every root split conductor mutually, electric current is 460A)
As shown in Figure 6, be typical tower structure schematic diagram.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all technician in the art, all should by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (4)
1. a UHV transmission line electromagnetic field modeling method, comprises the following steps:
Step S1, selection HIFREQ module, arrange soil model;
Step S2, arranging relevant voltage, current excitation, is the excitation of ABC phase voltage and Impetus of Current Source;
Step S3, arrange conductor, types of coatings, determine corresponding numbering according to use conductor editor's types of conductors, if there is conductive surface have coating, editor adds corresponding types of coatings and also determines corresponding numbering;
Step S4, according to reality use SesCAD build model, line parameter of going forward side by side arrange, add the line of observation; SesCAD is used to create described model according to the division number of phase spacing and wire, model, ground clearance; The motivational techniques of described model are 0.5m for respectively adding a bit of conductor length in corresponding wire front and back end, one section of voltage drive being set to three-phase, one section of current excitation being set to three-phase, and online lower to 1.5m place, the ground interpolation line of observation;
Step S5, computational EM waves, carry out the drafting of electromagnetic field curve under line.
2. UHV transmission line electromagnetic field modeling method according to claim 1, is characterized in that, in described step S2, the excitation types of ABC phase voltage excitation is GPR-electromotive force, and amplitude is phase voltage amplitude and angle.
3. UHV transmission line electromagnetic field modeling method according to claim 1, is characterized in that, in described step S2, the excitation types of Impetus of Current Source is for being communicated with, and current amplitude is the electric current on every root divided conductor.
4. UHV transmission line electromagnetic field modeling method according to claim 1, is characterized in that, in the middle of wire, two ground connection shaft towers are built at corresponding span place, and place ground wire.
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| CN201510507363.9A CN105138760B (en) | 2015-08-18 | 2015-08-18 | UHV transmission line electromagnetic field modeling method |
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| CN201510507363.9A CN105138760B (en) | 2015-08-18 | 2015-08-18 | UHV transmission line electromagnetic field modeling method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109002648A (en) * | 2018-08-20 | 2018-12-14 | 国网安徽省电力有限公司 | The emulated computation method of construction line inductive voltage and current based on CDEGS |
Citations (2)
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| CN101369721A (en) * | 2008-09-18 | 2009-02-18 | 国网武汉高压研究院 | Method for reducing local field strength of ultrahigh voltage transmission lines |
| CN104810632A (en) * | 2015-04-29 | 2015-07-29 | 宗伟 | Method and device for determining grounding device of transmission line tower |
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2015
- 2015-08-18 CN CN201510507363.9A patent/CN105138760B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101369721A (en) * | 2008-09-18 | 2009-02-18 | 国网武汉高压研究院 | Method for reducing local field strength of ultrahigh voltage transmission lines |
| CN104810632A (en) * | 2015-04-29 | 2015-07-29 | 宗伟 | Method and device for determining grounding device of transmission line tower |
Non-Patent Citations (2)
| Title |
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| 刘冉 等: "CEDGS在接地网缺陷诊断中的应用研究", 《机电一体化》 * |
| 牛晓民: "电力系统接地分析软件CDEGS简介", 《华北电力技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109002648A (en) * | 2018-08-20 | 2018-12-14 | 国网安徽省电力有限公司 | The emulated computation method of construction line inductive voltage and current based on CDEGS |
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Effective date of registration: 20181204 Address after: 200122, 1122 deep road, Pudong New Area, Shanghai Co-patentee after: Shanghai Electric Power Design Institute Limited Patentee after: State Grid Shanghai Municipal Electric Power Company Address before: 200025 18-22 Floor, 310 Chongqing South Road, Huangpu District, Shanghai Patentee before: Shanghai Electric Power Design Institute Limited |
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