CN101232164A - High altitude 500kV compact type electric power line - Google Patents
High altitude 500kV compact type electric power line Download PDFInfo
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- CN101232164A CN101232164A CNA2008100580726A CN200810058072A CN101232164A CN 101232164 A CN101232164 A CN 101232164A CN A2008100580726 A CNA2008100580726 A CN A2008100580726A CN 200810058072 A CN200810058072 A CN 200810058072A CN 101232164 A CN101232164 A CN 101232164A
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Abstract
A high-altitude 500kV compact power transmission line comprises phase conductors arranged in a shape of reversed equilateral triangle and having a form of 6 times 300/40 and a splitting space of 365 nm; and a complex isolator selected at a 7% increase of the insulation height by an altitude increase of every 1000m, wherein alpha, the V-shaped string included angle of the complex isolator is 65 to 90 DEC. Compared with a common circuit, the invention has improved natural power by 29.9%, reduced width of line corridor by 19.2 m, reduced range of power frequency electric field higher than 4 kV/m below the line by 2/3, and reduced range of power frequency magnetic field higher than 4 muT by 60%. The adoption of the V-shaped string included angle of the complex isolator can facilitate the displacement and the stress of the complex isolator to meet the gap safety and the strength requirement. The invention has the significant advantages that the invention can effectively prevent lightning impact, prevent the complex isolator from fast aging under the irradiation of UV light, and resist the maximal wind speed, the heavy ice and the short circuit.
Description
Technical field: the invention belongs to the electric power transmission line category, especially 2000 meters～3000 meters high altitude localities 500kV compact transmission line project of transmitting and converting electricity technical fields.
Background technology:
Existing power transmission line project of transmitting and converting electricity is provided with, especially in 2000 meters～3000 meter section high altitude localitiess 500kV compact project of transmitting and converting electricity and transmission line are set, because of weather, temperature, reasons such as humidity, if transmission line mode is routinely built, the one, can not satisfy the requirement of enough passways for transmitting electricity, the 2nd, electromagnetic environment improvement work difficulty is very big, the 3rd, the difficult problem of high height above sea level transmission of electricity is outstanding especially, the 4th, the lightning protection problem of high mountains and deep gullies area circuit is difficult to solve, the 5th, enrich the area in vegetation and will cut down a large amount of trees, take a large amount of soils, make vegetation environmental along the line be subjected to heavy damage.
In order to solve and to overcome in the high altitude localities the problems referred to above that transmission line exists are set, adopting compact transmission line is a kind of valid approach.Compact line mainly contains two big characteristics: the one, and compact conformation takes up an area of and lacks, and the circuit cost of unit capacity is low; The 2nd, transmittability is greatly improved than conventional line.The compact power transmission mode is widely adopted in countries in the world.The compact technology of transmission of electricity is dwindled phase spacing, three groups of leads is placed in the same tower window by to the optimizing the arrangement of of lead, and increases to divide radical mutually, reduces wave impedance, increases electric capacity, reaches to improve through-put power and reduce the purpose that take up an area of in the circuit corridor.
The application of compact technology of transmission of electricity in the plains region reaches its maturity, but still groping the starting stage in the application of highlands.This is because of the increase along with height above sea level, and same air gap discharge voltage reduces, and can the insulation characterisitic of air gap be produced a very large impact, thereby proposes higher requirement for circuit external insulation and live line working; The height increase of height above sea level can cause that also relative air density reduces, make the corresponding increase of conductive line surfaces field intensity, the line corona loss is bigger, radio interference and noise improve around the circuit, therefore must select suitable conductor arrangement mode and split form, just can reduce corona loss, and alleviate influence environment; The characteristics of long transmission line, high height above sea level, big span also make circuit produce many new problems aspect overvoltage and the insulation coordination.
Therefore, in order to reduce the occupation of land in transmission line corridor, reduce the forest felling, keep biological environment, improve the unit corridor transmission line capability, guarantee that transmission line is stable, reliable, the compact technology of transmission of electricity will provide reliable foundation and support.
Summary of the invention:
Purpose of the present invention just is intended to overcome the above-mentioned project of transmitting and converting electricity that has now in the plains region, especially 500kV compact transmission line project of transmitting and converting electricity is used the weak point that exists in the high altitude localities and a kind of compact conformation is provided, take up an area of few, the circuit cost of unit capacity is low, 500kV compact transmission line and technology that transmittability is improved largely than conventional line.
The present invention realizes by following technical proposal.
(1) phase conductor adopts the arrangement mode of equilateral del; Wire form adopts 6 * 300/40, and heading spacing is 375mm, is respectively 7.2 meters, 7.5 meters, 7.7 meters at 2000,2500,3000 meters height above sea level condition phase spacings;
(2) the insulation coordination parameter of the height above sea level correction factor in 3000m and following area and the basic tower of compact, that is: 2000m, 2500m, 3000m height above sea level switching impulse height above sea level correction factor are respectively 1.15,1.18 and 1.22, and the lightning impulse correction coefficient gets 1.25,1.33 and 1.43 respectively; Tower window phase-ground minimum clearance distance is got 4.10m, 4.20m, 4.30m respectively; Alternate gap minimum range is respectively 6.45m (spaced apart 7.2m), 6.75m (spaced apart 7.5m), 6.95m (spaced apart 7.7m);
(3) composite insulator is pressed the every rising 1000m of height above sea level, and insulation height increases by 7% and chooses; Composite insulator V-type string angle α is 65 °～90 °;
(4) high height above sea level inter-phase spacer
A. the high altitude localities can be selected 7.2 meters and 7.7 meters conductor spacers for use, and diameter of mandrel 30mm, 34mm are to its vertical critical load 243N, 474N, maximum axial compression distance 6500mm, 5700mm, maximum axial 486N, 915N of placing of 7.2 meters conductor spacers; To 7.7 meters conductor spacers, vertically place critical load 182N, 377N, maximum axial compression distance 7400mm, 6600mm, maximum axial 375N, 755N;
B. according to the controlled condition of maximum wind velocity, 800m and following span need not install inter-phase spacer additional;
C. according to the controlled condition under the short circuit current effect, for 30kA, 40kA, the short circuit current of 50kA, during the 7.2m phase spacing, 1000m respectively, 800m, 500m and following span can not install conductor spacer additional; 7.7m during phase spacing, difference 1500m, 1100m, 700m and following span can not install conductor spacer additional;
D. heavy icing area should not select compact to arrange, and should adopt horizontally as far as possible; In heavy icing area, adopt compact line as need, should strictly control span and strain section shelves number continuously, with the jump height that deices of restriction lead.
The invention has the beneficial effects as follows, reduce the occupation of land in transmission line corridor, reduce the forest felling, keep biological environment, improve the unit corridor transmission line capability, guarantee that transmission line is stable, reliable, for the high altitude localities especially is provided with in the compact project of transmitting and converting electricity in 2000 meters～3000 meter section high altitude localitiess, about high height above sea level compact type tower insulation characterisitic and insulation coordination outside window, and tower window construction and insulator V-type string structure; The utilization of high height above sea level composite insulator, high height above sea level inter-phase spacer is used, and high height above sea level compact project of transmitting and converting electricity provides reliable foundation and support to the adaptation of electromagnetic environment.Phase conductor adopts the compact line of 6 * LGJ300/40 to adopt the conventional line of 4 * LGJ300/70 to compare with phase conductor, under the roughly the same condition of radio interference level and audible noise level, natural power can improve 29.9%, the circuit width of corridor can reduce 19.2m, the power frequency electric field scope that is higher than 4kV/m under the line can reduce 2/3, and the power frequency magnetic field scope that is higher than 4 μ T can reduce 60%.Composite insulator V-type string angle α adopts 65 °～90 °, and its displacement and composite insulator stress still satisfy gap safety and requirement of strength.The present invention can effectively prevent lightning impulse; Prevent that composite insulator is aging rapidly under ultraviolet irradiation, can resist maximum wind velocity, resists heavy ice, prevent short circuit.
Further set forth content of the present invention below in conjunction with drawings and Examples.
Description of drawings: Fig. 1 is a six-multiple conductor phase spacing structural representation of the present invention;
Fig. 2 is the arrangement mode schematic diagram of the equilateral del of six division phase conductors;
Fig. 3 is the compact type tower structural representation.
As Fig. 1, Fig. 2, Fig. 3, the present invention to the technical scheme that the 500kV compact transmission line adopts is:
(1) six division phase conductor 2 adopts the arrangement mode of equilateral del; Lead 1 form adopts 6 * 300/40, and heading spacing d is 375mm, is respectively 7.2 meters, 7.5 meters, 7.7 meters at 2000,2500,3000 meters height above sea level condition phase spacings;
(2) the insulation coordination parameter of the height above sea level correction factor in 3000m and following area and compact type tower 3 basic towers, that is: 2000m, 2500m, 3000m height above sea level switching impulse height above sea level correction factor are respectively 1.15,1.18 and 1.22, and the lightning impulse correction coefficient gets 1.25,1.33 and 1.43 respectively; Tower window phase-ground minimum clearance distance is got 4.10m, 4.20m, 4.30m respectively; Alternate gap minimum range is respectively 6.45m, and spaced apart b is 7.2m, 6.75m, and spaced apart b is 7.5m, 6.95m, and spaced apart b is 7.7m;
(3) composite insulator 4 is pressed the every rising 1000m of height above sea level, and insulation height increases by 7% and chooses; Composite insulator V-type string angle α is 65 °～90 °;
(4) high height above sea level inter-phase spacer
A. the high altitude localities can be selected 7.2 meters and 7.7 meters conductor spacers for use, and diameter of mandrel 30mm, 34mm are to its vertical critical load 243N, 474N, maximum axial compression distance 6500mm, 5700mm, maximum axial 486N, 915N of placing of 7.2 meters conductor spacers; To 7.7 meters conductor spacers, vertically place critical load 182N, 377N, maximum axial compression distance 7400mm, 6600mm, maximum axial 375N, 755N;
B. according to the controlled condition of maximum wind velocity, 800m and following span need not install inter-phase spacer additional;
C. according to the controlled condition under the short circuit current effect, for 30kA, 40kA, the short circuit current of 50kA, during the 7.2m phase spacing, 1000m respectively, 800m, 500m and following span can not install conductor spacer additional; 7.7m during phase spacing, difference 1500m, 1100m, 700m and following span can not install conductor spacer additional;
D. heavy icing area should not select compact to arrange, and should adopt horizontally as far as possible; In heavy icing area, adopt compact line as need, should strictly control span and strain section shelves number continuously, with the jump height that deices of restriction lead.
Claims (1)
1. high height above sea level 500kV compact transmission line is characterized in that:
(1) phase conductor adopts the arrangement mode of equilateral del; Wire form adopts 6 * 300/40, and heading spacing is 375mm; Be respectively 7.2 meters, 7.5 meters, 7.7 meters at 2000,2500,3000 meters height above sea level condition phase spacings;
(2) the insulation coordination parameter of the height above sea level correction factor in 3000m and following area and the basic tower of compact, that is: 2000m, 2500m, 3000m height above sea level switching impulse height above sea level correction factor are respectively 1.15,1.18 and 1.22, and the lightning impulse correction coefficient gets 1.25,1.33 and 1.43 respectively; Tower window phase-ground minimum clearance distance is got 4.10m, 4.20m, 4.30m respectively; Alternate gap minimum range is respectively 6.45m, and spaced apart is 7.2m, 6.75m, and spaced apart is that 7.5m, 6.95m spaced apart are 7.7m;
(3) composite insulator is pressed the every rising 1000m of height above sea level, and insulation height increases by 7% and chooses; Composite insulator V-type string angle α is 65 °～90 °;
(4) high height above sea level inter-phase spacer
A. the high altitude localities can be selected 7.2 meters and 7.7 meters conductor spacers for use, and diameter of mandrel 30mm, 34mm are to its vertical critical load 243N, 474N, maximum axial compression distance 6500mm, 5700mm, maximum axial 486N, 915N of placing of 7.2 meters conductor spacers; To 7.7 meters conductor spacers, vertically place critical load 182N, 377N, maximum axial compression distance 7400mm, 6600mm, maximum axial 375N, 755N;
B. according to the controlled condition of maximum wind velocity, 800m and following span need not install inter-phase spacer additional;
C. according to the controlled condition under the short circuit current effect, for 30kA, 40kA, the short circuit current of 50kA, during the 7.2m phase spacing, 1000m respectively, 800m, 500m and following span can not install conductor spacer additional; 7.7m during phase spacing, difference 1500m, 1100m, 700m and following span can not install conductor spacer additional;
D. heavy icing area should not select compact to arrange, and should adopt horizontally as far as possible; In heavy icing area, adopt compact line as need, should strictly control span and strain section shelves number continuously, with the jump height that deices of restriction lead.
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| CN2008100580726A CN101232164B (en) | 2008-01-31 | 2008-01-31 | High altitude 500kV compact type electric power line |
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| CN2008100580726A CN101232164B (en) | 2008-01-31 | 2008-01-31 | High altitude 500kV compact type electric power line |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102156249A (en) * | 2011-03-03 | 2011-08-17 | 南方电网科学研究院有限责任公司 | Method for testing long-term electrification of high-altitude extra-high voltage direct-current insulators |
| CN102306920A (en) * | 2011-08-24 | 2012-01-04 | 国网电力科学研究院 | Anti-oscillation arrangement and configuration method for phase-to-phase spacers of ultrahigh-voltage compact power transmission line |
| CN102561783A (en) * | 2012-01-31 | 2012-07-11 | 浙江省电力设计院 | 500kV vertical-arrangement symmetrical double-circuit compact tangent tower |
| CN103986105A (en) * | 2014-05-13 | 2014-08-13 | 国家电网公司 | Compact high-attitude electric transmission line tower window allowing wires to be specially arranged |
| CN104091031A (en) * | 2014-07-24 | 2014-10-08 | 四川电力设计咨询有限责任公司 | Method for determining maximum ice jumping height and maximum yawing distance of 20 mm heavy ice area transmission wire |
| CN104314352A (en) * | 2014-11-05 | 2015-01-28 | 甘肃省电力设计院 | Compact composite material power transmission line tower |
| CN104638559A (en) * | 2013-11-07 | 2015-05-20 | 国家电网公司 | Method for installing 500kV compact transmission line phase-to-phase spacers |
| CN106368495A (en) * | 2016-11-09 | 2017-02-01 | 国网浙江省电力公司绍兴供电公司 | Novel penetrating linear narrow base tower |
| CN107462777A (en) * | 2017-09-15 | 2017-12-12 | 中国电力科学研究院 | A kind of system and method for being used to carry out multichannel power frequency electric field measurement under high humidity conditions |
| CN109143138A (en) * | 2018-06-20 | 2019-01-04 | 中国电力科学研究院有限公司 | A kind of modified method of extra-high voltage equipment external insulation withstanding voltage height above sea level |
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| DE2432849A1 (en) * | 1974-07-09 | 1976-01-29 | Bbc Brown Boveri & Cie | HIGH VOLTAGE LINE |
| CN1979988B (en) * | 2005-12-08 | 2010-05-05 | 北京国电华北电力工程有限公司 | Common-tower double-return compact type corner transmission iron tower |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102156249B (en) * | 2011-03-03 | 2013-01-23 | 南方电网科学研究院有限责任公司 | Method for testing long-term electrification of high-altitude extra-high voltage direct-current insulators |
| CN102156249A (en) * | 2011-03-03 | 2011-08-17 | 南方电网科学研究院有限责任公司 | Method for testing long-term electrification of high-altitude extra-high voltage direct-current insulators |
| CN102306920A (en) * | 2011-08-24 | 2012-01-04 | 国网电力科学研究院 | Anti-oscillation arrangement and configuration method for phase-to-phase spacers of ultrahigh-voltage compact power transmission line |
| CN102306920B (en) * | 2011-08-24 | 2013-11-06 | 国网电力科学研究院 | Anti-oscillation arrangement and configuration method for phase-to-phase spacers of ultrahigh-voltage compact power transmission line |
| CN102561783A (en) * | 2012-01-31 | 2012-07-11 | 浙江省电力设计院 | 500kV vertical-arrangement symmetrical double-circuit compact tangent tower |
| CN104638559A (en) * | 2013-11-07 | 2015-05-20 | 国家电网公司 | Method for installing 500kV compact transmission line phase-to-phase spacers |
| CN104638559B (en) * | 2013-11-07 | 2017-02-22 | 国家电网公司 | Method for installing 500kV compact transmission line phase-to-phase spacers |
| CN103986105A (en) * | 2014-05-13 | 2014-08-13 | 国家电网公司 | Compact high-attitude electric transmission line tower window allowing wires to be specially arranged |
| CN104091031A (en) * | 2014-07-24 | 2014-10-08 | 四川电力设计咨询有限责任公司 | Method for determining maximum ice jumping height and maximum yawing distance of 20 mm heavy ice area transmission wire |
| CN104314352A (en) * | 2014-11-05 | 2015-01-28 | 甘肃省电力设计院 | Compact composite material power transmission line tower |
| CN106368495A (en) * | 2016-11-09 | 2017-02-01 | 国网浙江省电力公司绍兴供电公司 | Novel penetrating linear narrow base tower |
| CN106368495B (en) * | 2016-11-09 | 2018-09-07 | 国网浙江省电力公司绍兴供电公司 | One kind is novel to wear straight line narrow base tower |
| CN107462777A (en) * | 2017-09-15 | 2017-12-12 | 中国电力科学研究院 | A kind of system and method for being used to carry out multichannel power frequency electric field measurement under high humidity conditions |
| CN109143138A (en) * | 2018-06-20 | 2019-01-04 | 中国电力科学研究院有限公司 | A kind of modified method of extra-high voltage equipment external insulation withstanding voltage height above sea level |
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Effective date of registration: 20220624 Address after: 650217 yundian science and Technology Park, No.105, Yunda West Road, economic development zone, Kunming City, Yunnan Province Patentee after: YUNNAN ELECTRIC POWER TEST & RESEARCH INSTITUTE (GROUP) Co.,Ltd. Address before: 650051 Dongfeng lane, Dongfeng East Road, 14, Yunnan, Kunming Patentee before: YUN NAN ELECTRIC TEST & RESEARCH INSTITUTE GROUP Co.,Ltd. ELECTRIC INSTITUTE |