CN102296864A - Novel tower for extra-high voltage dual-circuit compact transmission - Google Patents
Novel tower for extra-high voltage dual-circuit compact transmission Download PDFInfo
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- CN102296864A CN102296864A CN2011101437869A CN201110143786A CN102296864A CN 102296864 A CN102296864 A CN 102296864A CN 2011101437869 A CN2011101437869 A CN 2011101437869A CN 201110143786 A CN201110143786 A CN 201110143786A CN 102296864 A CN102296864 A CN 102296864A
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Abstract
The invention provides a novel tower for extra-high voltage dual-circuit compact transmission, which comprises an upper cross arm, a v-shaped insulator string, an I-shaped straight string, a low-phase flexible insulator, a lower cross arm and a tower body. The novel tower is characterized in that a two-circuit six-phase extra-high voltage lead is hung between the upper cross arm and the lower cross arm, upper two-phase leads are hung on the same cross arm which is not provided with a lateral crank arm; a lower-phase lead is fixed by an upper insulator and a lower insulator through applying a pull force in a reverse direction; and the flexible insulator is adopted as a lower side insulator of the fixed lower-phase lead, even if the lead has a certain elastic activity space, transverse displacement of the lead is controlled. According to the structure of the novel tower in the invention, a lower bending arm is eliminated, and bending deformation, even breaking possibility, of the lower bending arm under the condition of a heavy load is avoided; and the flexible insulator is adopted as the lower side insulator of the fixed lower-phase lead, even if the lead has a certain elastic activity space, transverse displacement of the lead is controlled.
Description
Technical field
The present invention relates to a kind of novel tower that is used for the transmission of electricity of extra-high voltage same tower double circuit compact, belong to power system transmission line shaft tower design field, relate in particular to 1000kV and above extra-high voltage grade common-tower double-return compact type transmission line of electricity and support the tower structure design scheme that three-phase conducting wire forms clearance for insulation.
Background technology
In order to reduce the cost of power delivery, reduce the transmission of electricity corridor to appropriation of land, adopting extra-high voltage grade circuit and compact power transmission mode is two effectively approach, and therefore, UHV transmission and compact transmission of electricity all are used as the preferred version of remote large capacity transmission in countries in the world.According to the remote needs of carrying of China's electric energy, China was promoting the extra-high voltage grid construction energetically in recent years, had built up the 1000kV extra-high voltage experiment and demonstration engineering that puts into operation at present, and was also deepening continuously at the UHV transmission Study on Technology; Compact transmission line places three-phase conducting wire in the same tower window by to the optimizing the arrangement of of lead, and does not have earthing component between three-phase conducting wire, reaches to improve the nature transmission power, reduces the circuit width of corridor, improves the unit corridor transmission line capability.In short supply day by day along with China's land resources in recent years, compact line has also obtained development energetically in China, and standardization has been widely applied and realized to 500kV single time and double-loop compact circuit.Northwest Grid companies in 2008 have finished the key technology research work of 750kV single time and double-loop compact circuit.In order to build resource-conserving, environmentally friendly electrical network in China, State Grid Corporation of China continues to advance extra-high voltage grid scientific research and engineering construction work, has proposed to build the planning of extra-high voltage compact transmission line.
Because the compact line three-phase conducting wire is arranged in the same tower window, alternate no supporting frame, the lead gravity load all concentrates on the tower window of the outside, makes tower window overall structure size obviously greater than the shaft tower framework size of conventional line, and higher to the requirement of mechanical strength of tower window steel framework.For the extra-high voltage compact line, the lead division number increases, the gold utensil volume weight also further increases, lead improves the insulation distance between framework and lead, as 750kV compact type tower window phase spacing is 10m, and 1000kV extra-high voltage compact type tower window place wire pitch can reach 14m～15m, the extra-high voltage compact type tower window framework that wraps three-phase conducting wire is huge, and the framework mechanical load is big, and the shaft tower investment is many.So during the design of extra-high voltage compact type tower window, need when guaranteeing shaft tower bearing strength and electrical insulation intensity, optimize the tower structure size, reduce extra-high voltage compact line construction cost.
As shown in Figure 1, China's common-tower double-return compact type shaft tower all adopts T shape structure at present, upside two-phase V-type string lead is carried by crossbeam, downside V string is by bend arm carrying under body of the tower and the beam-end, because down phase V string angle is usually in 130 °～140 ° scopes, causes to reach phase V and go here and there 2 times of (85 °～95 ° of angles) insulator tension along the insulator string pulling force.In order to guarantee down not tension distortion of bend arm, design size is bigger usually, has improved the shaft tower cost.Still continue to use this kind tower as extra-high voltage same tower double circuit compact shaft tower, then bend arm is to guarantee that enough bearing capacities are arranged under the T shape tower, and design size will obviously increase, and the ability of heavy loads such as anti-strong wind, heavy icing is relatively poor.For this reason, at compact shaft tower load of extra-high voltage same tower double circuit and wire arrangements characteristics, need on existing pyramidal structure basis, further innovate, to adapt to China's follow-up extra-high voltage engineering construction needs.
Summary of the invention
The objective of the invention is: the design size that exists at existing Identical Double Circuit Compact Type Tower is bigger, the cost height, and the ability of heavy loads such as anti-strong wind, heavy icing is relatively poor, the present invention proposes a kind of novel tower that is used for the transmission of electricity of extra-high voltage same tower double circuit compact, this tower is when guaranteeing shaft tower bearing strength and electrical insulation intensity, optimize the tower structure size, can reduce extra-high voltage compact line construction cost.
Technical scheme of the present invention is: a kind of novel tower that is used for the extra-high voltage same tower double circuit compact transmission line, its by: directly go here and there in upside cross-arm, V-type insulator string, the I type, down phase flexible insulation, downside cross-arm and body of the tower are formed, it is characterized in that:
1) mounts twice 6 phase extra-high voltage grade leads between upper strata cross-arm and the lower floor's cross-arm;
2) upside two phase conductors hang on the same cross-arm, and this cross-arm does not have side and cranks arm;
3) descending phase conductor to apply pulling force the other way around by upper and lower insulator fixes;
4) the fixing downside insulator of phase conductor has down adopted flexible insulation, has both made lead that certain elasticity activity space is arranged, and has controlled the lateral displacement of lead again.
The invention has the beneficial effects as follows: compare with conventional T type tower structure, novel pyramidal structure of the present invention has been removed time bend arm, has avoided the flexural deformation under the heavy load condition of time bend arm, even the possibility of fracture; Downside has increased the fixing cross-arm of phase conductor down, though increased the tower material use quantity to a certain extent, reaches scope of activities upwards in the horizontal direction because this cross-arm mainly plays the restriction lead, and load is less, so the project organization size is also less; In addition, the fixing downside insulator of phase conductor has down adopted flexible insulation, has both made lead that certain elasticity activity space is arranged, and has controlled the lateral displacement of lead again.Thus, this tower is according to extra-high voltage double-loop compact line feature, taken all factors into consideration the problems such as safety of shaft tower under the volume, heavy load of extra-high voltage compact three-phase conducting wire arrangement mode, shaft tower, existing double-loop compact shaft tower type is all having innovation aspect upper cross girder construction and the following phase conductor serial type.
Description of drawings
Fig. 1 is the structural representation of double-loop compact T type tower of the prior art.
Fig. 2 is the structural representation of the novel tower that is used for the transmission of electricity of extra-high voltage same tower double circuit compact of the embodiment of the invention.
The specific embodiment
The present invention is described further below in conjunction with drawings and Examples.
Description of symbols among Fig. 1: the crooked down back of the body of 1-crossbeam, 2-, 3-body of the tower, the last phase v string of 4-, phase v string under the 5-.
Description of symbols among Fig. 2: 6-upside cross-arm, 7-v type insulator string is directly gone here and there phase flexible insulation under the 9-, 10-downside cross-arm, 11-body of the tower in the 8-I type.
The novel pyramidal structure design scheme of the embodiment of the invention, as shown in Figure 2.This kind tower the selection of material is an angle steel.The shaft tower both sides hang (A, B, C three-phase) lead respectively one time between the two-layer cross-arm up and down, are inverted triangle and distribute.Shaft tower divides two-layer cross-arm up and down, upside cross-arm 6 hangs two phase conductor V-type insulator strings 7 and directly goes here and there 8 in the phase conductor I type down, downside cross-arm 10 is by the fixing phase conductor down of inverted V-shaped string, and directly string lead teeter amplitude is big in the I type to alleviate, and vertical direction deices the jump problem.Compare with conventional double-loop compact T type tower, the cross-arm of phase conductor has been cancelled bend arm under the side in the suspension, has avoided the lateral bending easily diastrophic problem of overload of cranking arm, and cross-arm stability significantly strengthens.Fixing following phase flexible insulation 9 of phase conductor has down adopted flexible insulation, makes lead that certain elasticity activity space be arranged, and has controlled the teeter amplitude of lead again.
Compare with conventional T type tower structure, the novel pyramidal structure of this kind has been removed time bend arm, has avoided the flexural deformation under the heavy load condition of time bend arm, even the possibility of fracture.Downside has increased the fixing cross-arm of phase conductor down, though increased the tower material use quantity to a certain extent, reaches scope of activities upwards in the horizontal direction because this cross-arm mainly plays the restriction lead, and load is less, so the project organization size is also less.
So, this tower is according to extra-high voltage double-loop compact line feature, taken all factors into consideration the problems such as safety of shaft tower under the volume, heavy load of extra-high voltage compact three-phase conducting wire arrangement mode, shaft tower, existing double-loop compact shaft tower type is all having innovation aspect upper cross girder construction and the following phase conductor serial type.
Claims (1)
1. novel tower that is used for the extra-high voltage same tower double circuit compact transmission line, its by in upside cross-arm, V-type insulator string, the I type directly string,, phase flexible insulation, downside cross-arm and body of the tower are formed down, it is characterized in that:
1) mounts twice 6 phase extra-high voltage grade leads between upper strata cross-arm and the lower floor's cross-arm;
2) upside two phase conductors hang on the same cross-arm, and this cross-arm does not have side and cranks arm;
3) descending phase conductor to apply pulling force the other way around by upper and lower insulator fixes;
4) the fixing downside insulator of phase conductor has down adopted flexible insulation, has both made lead that certain elasticity activity space is arranged, and has controlled the lateral displacement of lead again.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101437869A CN102296864B (en) | 2011-05-31 | 2011-05-31 | Novel tower for extra-high voltage dual-circuit compact transmission |
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| CN2011101437869A CN102296864B (en) | 2011-05-31 | 2011-05-31 | Novel tower for extra-high voltage dual-circuit compact transmission |
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| CN102296864A true CN102296864A (en) | 2011-12-28 |
| CN102296864B CN102296864B (en) | 2013-06-05 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046794A (en) * | 2012-12-27 | 2013-04-17 | 国核电力规划设计研究院 | Ultrahigh-voltage direct current crank arm tangent tower |
| WO2014012345A1 (en) * | 2012-07-19 | 2014-01-23 | 安徽华电工程咨询设计有限公司 | "i-j-i" serial type novel power transmission line tower |
| CN105133909A (en) * | 2015-09-29 | 2015-12-09 | 中国能源建设集团湖南省电力设计院有限公司 | Uplift-resistant linear tower in mountain area |
| CN105386632A (en) * | 2015-11-30 | 2016-03-09 | 国核电力规划设计研究院 | Wind deflection prevention extra-high voltage direct current linear tower |
| CN106121340A (en) * | 2016-07-01 | 2016-11-16 | 国家电网公司 | A kind of big " V " formula single loop compact type tower window construction |
| CN109629899A (en) * | 2018-11-29 | 2019-04-16 | 中国电力科学研究院有限公司 | It is a kind of for exchanging 750kV with the device of four circuit power transmission tower of tower |
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| RU2055135C1 (en) * | 1992-12-16 | 1996-02-27 | Украинский государственный проектно-изыскательский институт по проектированию энергетических систем и электрических сетей "Укрэнергосетьпроект" | Gantry abutment for high-voltage transmission lines |
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2011
- 2011-05-31 CN CN2011101437869A patent/CN102296864B/en active Active
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| CN201298718Y (en) * | 2008-11-07 | 2009-08-26 | 浙江省电力设计院 | Suspension angle tower of shared-tower and double-circuit tension-type transmission line |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014012345A1 (en) * | 2012-07-19 | 2014-01-23 | 安徽华电工程咨询设计有限公司 | "i-j-i" serial type novel power transmission line tower |
| CN103046794A (en) * | 2012-12-27 | 2013-04-17 | 国核电力规划设计研究院 | Ultrahigh-voltage direct current crank arm tangent tower |
| CN105133909A (en) * | 2015-09-29 | 2015-12-09 | 中国能源建设集团湖南省电力设计院有限公司 | Uplift-resistant linear tower in mountain area |
| CN105386632A (en) * | 2015-11-30 | 2016-03-09 | 国核电力规划设计研究院 | Wind deflection prevention extra-high voltage direct current linear tower |
| CN106121340A (en) * | 2016-07-01 | 2016-11-16 | 国家电网公司 | A kind of big " V " formula single loop compact type tower window construction |
| CN109629899A (en) * | 2018-11-29 | 2019-04-16 | 中国电力科学研究院有限公司 | It is a kind of for exchanging 750kV with the device of four circuit power transmission tower of tower |
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| CN102296864B (en) | 2013-06-05 |
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