CN204464916U - ± 800kV and ± 500kV is with tower mixed pressure transmission line polar conductor arrangement - Google Patents
± 800kV and ± 500kV is with tower mixed pressure transmission line polar conductor arrangement Download PDFInfo
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- CN204464916U CN204464916U CN201520213335.1U CN201520213335U CN204464916U CN 204464916 U CN204464916 U CN 204464916U CN 201520213335 U CN201520213335 U CN 201520213335U CN 204464916 U CN204464916 U CN 204464916U
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Abstract
The utility model discloses one ± 800kV and ± 500kV with tower mixed pressure transmission line polar conductor arrangement, it comprises horizontally disposed lower floor cross-arm, the upper level of lower floor's cross-arm is provided with upper strata cross-arm, the left end of lower floor's cross-arm is connected with-500kv voltage conductor by the first V-type insulator string, the right-hand member of lower floor's cross-arm is symmetrically connected with+500kv voltage conductor by the first V-type insulator string, cross-arm top, upper strata is symmetrically arranged with two earth wire supports, two earth wire supports are all connected with ground wire, the left end of upper strata cross-arm is connected with+800kv voltage conductor by the second V-type insulator string, the right-hand member of upper strata cross-arm is symmetrically connected with-800kv voltage conductor by the second V-type insulator string.It can effectively reduce transmission line investment under the prerequisite meeting the requirements such as electromagnetic environment limit value, electric clearance, lightning protection.
Description
Technical field
The utility model relates to the polar conductor arrangement of special superhigh pressure with tower mixed pressure transmission line, refers to that one ± 800kV and ± 500kV is with tower mixed pressure transmission line polar conductor arrangement particularly.
Background technology
Along with socioeconomic sustained and rapid development, electricity needs constantly rises, and power grid construction is accelerated thereupon.But then, economic sustainable development makes land resource more be tending towards nervous, particularly developed area, is difficult to ensure sufficient power transmission line corridor resource.Therefore, along with the further lifting of economy, its construction level, the contradiction of electricity needs increase and transmission of electricity corridor resource scarcity certainly will be caused.Meanwhile, because power supply point distance different load center distance differs, different electric pressure is adopted to carry out electric power conveying reasonable more economically.
Carrying out the pre-verification work of Tianguang HVDC transformation at present.According to systems organization, Tianguang HVDC transformation need be sent outside in conjunction with remote northern water power.Because the northern water power in Burma sends distance outside more than 2000km, must adopt ± 800kV extra-high voltage direct-current transmission scheme, Tianguang HVDC is ± 500kV transmission of electricity, in part corridor nervous location employings ± 800kV and ± scheme that 500kV transmits electricity with tower comparatively feasible.
In China, single time ± 800kV extra-high voltage direct-current transmission and ± 500kV super high voltage direct current electricity transmission have ripe experience, but extra-high voltage direct-current and superhigh voltage DC are transmitted electricity with tower does not all have ready-made construction experiences at home and abroad, special superhigh pressure to be transmitted electricity with tower with tower mixed pressure direct current transportation and extra-high-voltage alternating current and compared with single time extra-high voltage direct-current transmission, more have its technical characterstic and difficult point, circuit is more outstanding on problems such as environment and self electromagnetism impact, circuit self lightning protections.
Therefore, the polar conductor arrangement of research ± 800kV and ± 500kV special superhigh pressure mixed pressure transmission line, makes special superhigh pressure meet gap, overvoltage protection, electromagnetism limit value etc. with tower mixed pressure transmission line and requires to have become an important job.
Summary of the invention
The purpose of this utility model to provide exactly a kind of structure simple ± 800kV with ± 500kV with tower mixed pressure transmission line polar conductor arrangement, this structure can effectively reduce transmission line investment meeting under the prerequisite that electromagnetic environment limit value, electric clearance, lightning protection etc. require.
For achieving the above object, designed by the utility model ± 800kV with ± 500kV with tower mixed pressure transmission line polar conductor arrangement, it comprises horizontally disposed lower floor cross-arm, the upper level of lower floor's cross-arm is provided with upper strata cross-arm, the left end of lower floor's cross-arm is connected with-500kv voltage conductor by the first V-type insulator string, the right-hand member of lower floor's cross-arm is symmetrically connected with+500kv voltage conductor by the first V-type insulator string, cross-arm top, upper strata is symmetrically arranged with two earth wire supports, two earth wire supports are all connected with ground wire, two ground wires are in same level, the left end of upper strata cross-arm is connected with+800kv voltage conductor by the second V-type insulator string, the right-hand member of upper strata cross-arm is symmetrically connected with-800kv voltage conductor by the second V-type insulator string, + 800kv voltage conductor and-800kv voltage conductor are in same level,-500kv voltage conductor and+500kv voltage conductor are in same level, die opening L1 between+800kv voltage conductor and-800kv voltage conductor is 22m, die opening L2 between-500kv voltage conductor and+500kv voltage conductor is 17m, difference in height h1 between the horizontal plane at+800kv voltage conductor and-800kv voltage conductor place and the horizontal plane at two ground wire places is 18m, difference in height h2 between the horizontal plane at the horizontal plane at+800kv voltage conductor and-800kv voltage conductor place and-500kv voltage conductor and+500kv voltage conductor place is 23m.
First V-type insulator string length is 7.5m, and angle a is 80 °; Second V-type insulator string length is 11.5m, and angle b is 90 °.
Advantage of the present utility model is mainly reflected in following several respects:
One, employing ± 800kV and ± 500kV special superhigh pressure mixed pressure transmission line replace ± 800kV UHVDC Transmission Lines and ± 500kV superhigh voltage DC circuit, can reduce width of corridor, reduces housing demolition and land acquisition transmission line is invested;
Its two, ± 800kV extra high voltage line is on upper strata, and ± 500kV supertension line is in lower floor, and same polarity wire heteropleural arrangement can meet the requirements such as electromagnetic environment limit value, electric clearance, lightning protection.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure: earth wire support 1; Upper strata cross-arm 2; Second V-type insulator string 3; + 800kv voltage conductor 4; + 500kv voltage conductor 5; First V-type insulator string 6;-500kv voltage conductor 7; Lower floor's cross-arm 8;-800kv voltage conductor 9.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, but this embodiment should not be construed restriction of the present utility model.
As shown in the figure ± 800kV with ± 500kV with tower mixed pressure transmission line polar conductor arrangement, it comprises horizontally disposed lower floor cross-arm 8, the upper level of lower floor's cross-arm 8 is provided with upper strata cross-arm 2, the left end of lower floor's cross-arm 8 is connected with-500kv voltage conductor 7 by the first V-type insulator string 6, the right-hand member of lower floor's cross-arm 8 is symmetrically connected with+500kv voltage conductor 5 by the first V-type insulator string 6, upper strata cross-arm 2 top is symmetrically arranged with two earth wire supports 1, two earth wire supports 1 are all connected with ground wire, two ground wires are in same level, the left end of upper strata cross-arm 2 is connected with+800kv voltage conductor 4 by the second V-type insulator string 3, the right-hand member of upper strata cross-arm 2 is symmetrically connected with-800kv voltage conductor 9 by the second V-type insulator string 3, + 800kv voltage conductor 4 and-800kv voltage conductor 9 are in same level,-500kv voltage conductor 7 and+500kv voltage conductor 5 are in same level, die opening L1 between+800kv voltage conductor 4 and-800kv voltage conductor 9 is 22m, die opening L2 between-500kv voltage conductor 7 and+500kv voltage conductor 5 is 17m, difference in height h1 between the horizontal plane at+800kv voltage conductor 4 and-800kv voltage conductor 9 place and the horizontal plane at two ground wire places is 18m, difference in height h2 between the horizontal plane at the horizontal plane at+800kv voltage conductor 4 and-800kv voltage conductor 9 place and-500kv voltage conductor 7 and+500kv voltage conductor 5 place is 23m.
First V-type insulator string 6 length is 7.5m, and angle a is 80 °; Second V-type insulator string 3 length is 11.5m, and angle b is 90 °.
Benefit case:
If four kinds of conductor arrangement upper strata cross-arms 2, the two ends of lower floor's cross-arm 8, possible mode has 5 kinds, be respectively, A: the left end of upper strata cross-arm 2 is connected with+800kv voltage conductor 4 by the second V-type insulator string 3, the right-hand member of upper strata cross-arm 2 is symmetrically connected with-800kv voltage conductor 9 by the second V-type insulator string 3, be that the left end of lower floor's cross-arm 8 is connected with-500kv voltage conductor 7 by the first V-type insulator string 6 respectively, the right-hand member of lower floor's cross-arm 8 is symmetrically connected with+500kv voltage conductor 5 by the first V-type insulator string 6;
B: the left end of upper strata cross-arm 2 is connected with+800kv voltage conductor 4 by the second V-type insulator string 3, the right-hand member of upper strata cross-arm 2 is symmetrically connected with-800kv voltage conductor 9 by the second V-type insulator string 3, be that the left end of lower floor's cross-arm 8 is connected with+500kv voltage conductor 5 by the first V-type insulator string 6 respectively, the right-hand member of lower floor's cross-arm 8 is symmetrically connected with-500kv voltage conductor 7 by the first V-type insulator string 6;
C: the left end of upper strata cross-arm 2 is connected with+500kv voltage conductor 5 by the second V-type insulator string 3, the right-hand member of upper strata cross-arm 2 is symmetrically connected with-500kv voltage conductor 7 by the second V-type insulator string 3, be that the left end of lower floor's cross-arm 8 is connected with-800kv voltage conductor 9 by the first V-type insulator string 6 respectively, the right-hand member of lower floor's cross-arm 8 is symmetrically connected with+800kv voltage conductor 4 by the first V-type insulator string 6;
D: the left end of upper strata cross-arm 2 is connected with+500kv voltage conductor 5 by the second V-type insulator string 3, the right-hand member of upper strata cross-arm 2 is symmetrically connected with-500kv voltage conductor 7 by the second V-type insulator string 3, be that the left end of lower floor's cross-arm 8 is connected with+800kv voltage conductor 4 by the first V-type insulator string 6 respectively, the right-hand member of lower floor's cross-arm 8 is symmetrically connected with-800kv voltage conductor 9 by the first V-type insulator string 6;
E: the left end of upper strata cross-arm 2 is connected with+800kv voltage conductor 4 by the second V-type insulator string 3, the right-hand member of upper strata cross-arm 2 is symmetrically connected with-500kv voltage conductor 7 by the second V-type insulator string 3, be that the left end of lower floor's cross-arm 8 is connected with-800kv voltage conductor 9 by the first V-type insulator string 6 respectively, the right-hand member of lower floor's cross-arm 8 is symmetrically connected with+500kv voltage conductor 5 by the first V-type insulator string 6;
According to above-mentioned parameter, the conductive line surfaces field intensity under different polar conductor arrangement is as shown in table 1.
Table 1 different polar conductor arrangement lower wire surface electric field intensity
According to above-mentioned parameter, under different polar conductor arrangement, ground wire surface electric field intensity is shown in Table 2.
Ground wire surface electric field intensity under the different polar conductor arrangement of table 2
According to above-mentioned parameter, the maximum formate field intensity in different polar conductor arrangement lower wire ground and ion current density as shown in table 3.
Ground formate field intensity and ion current density under the different polar conductor arrangement of table 3
According to above-mentioned parameter, under different polar conductor arrangement radio interference and audible noise as shown in table 4.
Radio interference and audible noise under the different polar conductor arrangement of table 4
According to above-mentioned parameter, at different polar conductor arrangement line width of corridor and minimum as shown in table 5 to ground level.
Table 5 different polar conductor arrangement line width of corridor and minimum to ground level
According to above-mentioned parameter, under different polar conductor arrangement, tripping rate with lightning strike is as shown in table 6.
Tripping rate with lightning strike under the different polar conductor arrangement of table 6
Result of calculation as can be seen from table 1 to table 6, under E arrangement, due to the asymmetry of its both sides wire, cause four polar conductors and two ground wire surface electric field intensities different, polar conductor also exceeds a lot in the field intensity of ground wire surface induction than wire itself, therefore, conductor arrangement mode does not recommend to adopt E scheme.Corresponding minimum under ground level, the width of corridor of A mode is about the half of B, C, D mode, and A arrangement obviously will be better than other all mode.The tripping rate with lightning strike of A, B arrangement is minimum.During below height above sea level 500m, A arrangement electromagnetic environment meets the demands, and height above sea level makes the audible noise of A arrangement meet limit value requirement more than during 500m by changing the modes such as wire type, increase shaft tower height, increase die opening.
Consider line electricity magnetic environment, width of corridor and lightning protection properties, arrangement A is optimum.
The content be not described in detail in this specification, belongs to the known prior art of those skilled in the art.
Claims (2)
1. one kind ± 800kV and ± 500kV is with tower mixed pressure transmission line polar conductor arrangement, it is characterized in that: it comprises horizontally disposed lower floor cross-arm (8), the upper level of described lower floor cross-arm (8) is provided with upper strata cross-arm (2), the left end of described lower floor cross-arm (8) is connected with-500kv voltage conductor (7) by the first V-type insulator string (6), the right-hand member of described lower floor cross-arm (8) is symmetrically connected with+500kv voltage conductor (5) by the first V-type insulator string (6), cross-arm (2) top, described upper strata is symmetrically arranged with two earth wire supports (1), described two earth wire supports (1) are all connected with ground wire, described two ground wires are in same level, the left end on described upper strata cross-arm (2) is connected with+800kv voltage conductor (4) by the second V-type insulator string (3), the right-hand member on described upper strata cross-arm (2) is symmetrically connected with-800kv voltage conductor (9) by the second V-type insulator string (3), described+800kv voltage conductor (4) and-800kv voltage conductor (9) are in same level, described-500kv voltage conductor (7) and+500kv voltage conductor (5) are in same level, die opening L1 between+800kv voltage conductor (4) and-800kv voltage conductor (9) is 22m, die opening L2 between-500kv voltage conductor (7) and+500kv voltage conductor (5) is 17m, difference in height h1 between the horizontal plane at+800kv voltage conductor (4) and-800kv voltage conductor (9) place and the horizontal plane at two ground wire places is 18m, difference in height h2 between the horizontal plane at+800kv voltage conductor (4) and-800kv voltage conductor (9) place and the horizontal plane at-500kv voltage conductor (7) and+500kv voltage conductor (5) place is 23m.
2. according to claim 1 ± 800kV and ± 500kV is with tower mixed pressure transmission line polar conductor arrangement, it is characterized in that: described first V-type insulator string (6) length is 7.5m, and angle a is 80 °; Described second V-type insulator string (3) length is 11.5m, and angle b is 90 °.
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| CN201520213335.1U CN204464916U (en) | 2015-04-10 | 2015-04-10 | ± 800kV and ± 500kV is with tower mixed pressure transmission line polar conductor arrangement |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106099818A (en) * | 2016-08-15 | 2016-11-09 | 中国电力工程顾问集团西北电力设计院有限公司 | ± 1100kV direct current exchanges same tower wire arrangements structure with double back 330kV |
| CN106887818A (en) * | 2017-05-03 | 2017-06-23 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of double division ground wire arrangements of DC line |
| CN107869271A (en) * | 2016-09-23 | 2018-04-03 | 国家电网公司 | Pyramidal structure of ± 1100kV the extra-high voltage direct-currents with 750kV ultrahigh-voltage alternating-currents circuit with tower |
| RU2698310C1 (en) * | 2018-12-14 | 2019-08-26 | федеральное государственное бюджетное образовательное учреждение высшего образования "Алтайский государственный технический университет им. И.И. Ползунова" (АлтГТУ) | High-voltage three-phase overhead line |
-
2015
- 2015-04-10 CN CN201520213335.1U patent/CN204464916U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106099818A (en) * | 2016-08-15 | 2016-11-09 | 中国电力工程顾问集团西北电力设计院有限公司 | ± 1100kV direct current exchanges same tower wire arrangements structure with double back 330kV |
| CN107869271A (en) * | 2016-09-23 | 2018-04-03 | 国家电网公司 | Pyramidal structure of ± 1100kV the extra-high voltage direct-currents with 750kV ultrahigh-voltage alternating-currents circuit with tower |
| CN106887818A (en) * | 2017-05-03 | 2017-06-23 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of double division ground wire arrangements of DC line |
| RU2698310C1 (en) * | 2018-12-14 | 2019-08-26 | федеральное государственное бюджетное образовательное учреждение высшего образования "Алтайский государственный технический университет им. И.И. Ползунова" (АлтГТУ) | High-voltage three-phase overhead line |
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