CN209233437U - ± 1100KV DC line tangent tower arrester device - Google Patents

Abstract

The utility model provides one kind ± 1100KV DC line tangent tower arrester device and is fixed with conducting wire cross-arm on tangent tower tower body it includes tangent tower tower body, and conducting wire cross-arm is connected with conducting wire, and arrester device includes at least: choosing bracket, arrester, drainage thread outside；It chooses bracket outside to extend obliquely upward from tangent tower conducting wire cross-arm, be in a vertical plane with conducting wire, top is located at the surface of conducting wire；The low-pressure end of arrester is chosen on bracket outside hanging on, and the high-voltage end of arrester is connected to conducting wire；The lower end of drainage thread is all connected to conducting wire, the high-voltage end of the upper end connection arrester of drainage thread.The utility model gapless arrestyer device the switching overvoltage of route can be limited in 1.5p.u hereinafter, reduction gap width and then reduction steel tower tower head size, greatly save line project investment.

Description

± 1100KV DC line tangent tower arrester device

Technical field

The utility model relates to transmission line of electricity Suppressing Switching Overvoltage technical fields, and in particular to a kind of DC line straight line Tower gapless arrestyer device.

Background technique

In recent years, extra-high voltage direct-current transmission technology is greatly developed in China Power Grids construction, and extra-high voltage direct-current is defeated Electric line construction scale expands year by year, it has also become the important component of China Power Grids.But the power generation project in China is gradually western It moves and moves northward, load center is predominantly located at eastern region, leads to the distance between the energy place of production and energy-consuming area increasingly Greatly, route is by also increasing the case where high altitude localities.The switching overvoltage level of long range UHVDC Transmission Lines compared with Height causes switching overvoltage gap width to increase (especially in high altitude localities), and insulated lengths increase, and then cause tower head size And tower increases again, cost significantly improves.The higher place installation route gapless of switching overvoltage is lightning-arrest in the middle part of DC line Device, the switching overvoltage that can effectively inhibit route are horizontal.Therefore, reliably gapless is reasonably installed and is kept away on DC line Thunder device is as there is an urgent need to the research topics of development.

Leakage conductor has at home and abroad been mounted on the alternating current-direct current overhead transmission line road from distribution to 500kV in large quantities, And development ± 800kV DC line arrester is started, but has predominantly limited the surge arrester with external series gaps of lightning surge.

Currently, achievable surge arrester with external series gaps scheme is as follows:

1) a kind of ± 800 kilovolts of DC line arrester mounting devices and method (CN201610184499)

The technical solution uses gap arrester, and mounting device includes insulator suspension yoke plate, connecting rod, insulation column and leads Line conductor spacer.Insulator hangs yoke plate and is equipped with n mounting hole, and n >=3, it is mutually flat that two of them mounting hole is used for installation two Capable insulator chain, another mounting hole is for installing connecting rod；The connecting rod is L-type hard connecting rod；Leakage conductor Ontology one end is mounted on the base, and pedestal is installed to insulator chain by connecting rod and hangs yoke plate；Leakage conductor ontology one end Insulation column is equipped between pedestal；The other end of leakage conductor ontology is high-voltage end, and high-voltage end is mounted on lead spacer On.Leakage conductor ontology is parallel with the insulator chain being mounted on insulator suspension yoke plate.

The technical solution main function is the lightning surge level for limiting route, and arrester uses and line insulation interest Have the mode installed in series and parallel, does not need design connecting tool, only the aperture mounting fixing parts on former fitting series board.

2) a kind of electric transmission line lightning arrester device and installation method (CN201710324993)

The technical solution use gap arrester, mainly include lightning arrester body, high pressure termination electrode, low pressure termination electrode, Gap adjusts component, insulator foot, counter, support insulator and angle bar frame.High pressure termination electrode and transmission pressure hanging yoke plate Connection, low pressure termination electrode adjust component by gap and connect with lightning arrester body one end, and the lightning arrester body other end passes through insulation Pedestal is connect with angle bar frame, and counter is fixed on angle bar frame, and angle bar frame is connect with shaft tower, and support insulator diagonal brace connects It connects between lightning arrester body and angle bar frame.

The technical solution main function is the lightning surge level for limiting route, and arrester uses and is supported on steel tower pedestal On mounting means, no drainage thread do not need to design novel connecting tool.

From the above mentioned, the arrester that the prior art is installed is the surge arrester with external series gaps for limiting lightning surge, keeps away Thunder device is not directly linked with conducting wire, and it is lightning-arrest that mount scheme is not suitable for DC power transmission line Suppressing Switching Overvoltage gapless Device.And Suppressing Switching Overvoltage gapless arrestyer needs drainage thread and couples with line conductor, drainage thread is by arrester and leads Line has been connected into an entirety, and the two is therefore interrelated, influences each other.And ± 1100kV DC line arrester length Longer (about 4.1 times of 500kV leakage conductor), volume and weight also bigger (about the 5.3 of 500kV leakage conductor Times), installation both at home and abroad and application are still blank at present.

Utility model content

The technical issues of the utility model is solved is to provide one kind ± 1100KV DC line tangent tower arrester Device.

Technological means used by the utility model is as described below.

± 1100KV DC line tangent tower the arrester device of the utility model, it includes tangent tower tower body, tangent towers It is fixed with conducting wire cross-arm on tower body, conducting wire cross-arm is connected with conducting wire, which is characterized in that includes at least: choosing bracket outside, it is described to choose outside Bracket is extended obliquely upward from tangent tower conducting wire cross-arm, is in a vertical plane with conducting wire, top is located at conducting wire Surface；Arrester, the low-pressure end of the arrester is hung on to be chosen on bracket outside, and the high-voltage end of arrester is connected on conducting wire； Drainage thread, the lower end of the drainage thread are all connected to conducting wire, the high-voltage end of the upper end connection arrester of drainage thread.

The outer top for choosing bracket sets outer fixing end, and arrester is suspended in outer fixing end, and outer fixing end arrives conducting wire Vertical range and the length of arrester match.

The arrester is divided into 7 sections from top to bottom, and every section length 2.8m uses flanged joint, lower part three between section and section Section flange outer sleeve has the air gap distance of grading ring, flange and grading ring and tangent tower tower body to meet wanting for safety clearance value It asks.

The low-pressure end of the arrester is hung in outer fixing end by upper hinge fitting, and the upper hinge fitting is from upper Successively include under: EB hanging plate, U-shaped ring, extension ring, U-shaped ring, DB adjustment plate, U-shaped ring, U-shaped ring, DB adjustment plate therein are set There is at least one idle hanging hole.

The high-voltage end of the arrester is connected on conducting wire by underneath hinges fitting, and the underneath hinges fitting is from top to bottom Successively include: U-shaped ring, U-shaped ring, PT adjustment plate, DB adjustment plate, U type ring extend ring, U-shaped ring.

The bottom of the underneath hinges fitting is equipped with dedicated yoke plate, and four of the dedicated yoke plate split payment to a porter folder using preformed Silk thread folder.

The high-voltage end of the arrester connects two drainage threads, the drainage of the hydraulic shaped cable clamp of the SY by the hydraulic shaped cable clamp of SY Plate inclination angle is 30 °.

The lower end of the drainage thread is connected on conducting wire by TL type wire clamp.

Technical effect caused by the utility model:

(1) the utility model demonstrates the feasibility that gapless arrestyer is installed in DC line tangent tower, is AC line Road installation gapless arrestyer provides example.

(2) for arrester by choosing cradle hangs outside right above conducting wire, arrester lower end passes through hinge fitting and connecting wire It connects, there are remaining length for hinge fitting, avoid the destruction under the extreme operating conditions such as ice coating wire broken string.

(3) the dedicated yoke plate of the setting of arrester upper and lower ends connecting hinge fitting, especially quadripartion and wire clamp design, can Guarantee that the arrester of suspension with the synchronous wind pendulum of conducting wire, meets installation clearance requirement, and protect drainage thread, securely and reliably.

(4) using surge arrester support is chosen outside, arrester length is suitable with V string projection string length, grows without increasing V string string.

(5) design of hinge fitting and the dedicated yoke plate of quadripartion meets receiving unilateral side under the extreme operating conditions such as overload and leads The requirement of line load, quadripartion yoke plate are effectively prevented the abrasion of conducting wire stress using top-twisted wire-clip.

(6) for convenience of later period operation and maintenance, crane dismounting scheme, safe ready is can be used in the utility model.

Detailed description of the invention

Fig. 1 is the utility model tangent tower arrester device overall structure diagram.

Fig. 2 is the arrester low-pressure end structural schematic diagram of the utility model tangent tower arrester device.

Fig. 3 is the arrester high-voltage end structural schematic diagram of the utility model tangent tower arrester device.

Fig. 4-5 is that the outer of the utility model tangent tower arrester device chooses stent size structural schematic diagram.

Fig. 6 is the arrester outline drawing of the utility model tangent tower arrester device.

Fig. 7 be the utility model tangent tower arrester device arrester windage yaw after with tower body gap schematic diagram.

Fig. 8-9 is the connecting tool schematic diagram of the utility model tangent tower arrester device.

Figure 10-11 is the drainage thread connecting tool schematic diagram of the utility model tangent tower arrester device.

Figure 12 is the dedicated yoke plate schematic diagram of the utility model tangent tower arrester device.

Specific embodiment

Please refer to Fig. 1~3, one kind ± 1100KV DC line tangent tower arrester device of the utility model, it includes Tangent tower tower body is fixed with conducting wire cross-arm on tangent tower tower body, passes through 4 connecting wire of V-type insulator chain at the end of conducting wire cross-arm 5, it is extended obliquely upward from tangent tower conducting wire cross-arm and chooses bracket 1 outside being formed, top end sets outer fixing end 11, with conducting wire 5 In a vertical plane, so that outer fixing end 11 is located at the surface of conducting wire 5；The low-pressure end (upper end) of arrester 3 passes through upper Portion's hinge fitting 2 is hung in outer fixing end 11, and the high-voltage end (lower end) of arrester 3 is connected in eight by underneath hinges fitting 6 On four conducting wires at the middle and upper levels of split conductor 5；The lower end of drainage thread 8 is all connected to conducting wire 5, and the upper end connection of drainage thread 8 is lightning-arrest The high-voltage end (lower end) of device 3.The discharge current of release arrester is fetched by drainage thread and connecting wire as a result, while being protection Drainage thread increases underneath hinges fitting connection arrester and conducting wire.

Referring to Fig. 6, arrester 3 designed by the arrester device of the utility model is divided into 7 sections, divide from top to bottom Section serial number is followed successively by Section 7 to Section 1, and every section length 2.8m is coupled between section and section using flange, 3 section flange outer sleeve of lower part There are uniform ring, arrester bottom end housing high pressure anticorona ring, arrester total length is 19.98m.

Fig. 4~5 are please referred to, arrester 3 hangs on the surface of conducting wire 5, and the projection of V-type insulator chain 4 to tangent tower is long About 12.5m is less than arrester away from length 19.66m between hanging point.Therefore, suspension arrester, which uses, hangs on tangent tower conducting wire cross-arm The upper outer mode for choosing bracket.To the tangent tower of different model, the size design for choosing bracket outside slightly has difference, such as following table, works as straight line Tower be Z30102B2L-71 type when, choose outside arrester hanging point on bracket 1 outer fixing end 11 need to from conducting wire cross-arm bottom surface (V-type is exhausted Edge substring hanging point) height (H1) is improved as 8.2m；When tangent tower is Z30102B2-75 type, arrester on bracket 1 is chosen outside and is hung It is 8.0m that the outer fixing end 11 of point need to improve height (H1) from conducting wire cross-arm bottom surface.

Simultaneously referring to Fig. 7, electrification flange and grading ring will meet safety clearance value at a distance from tangent tower (earthing member) Requirement, the air gap value of merogenesis arrester flange or grading ring and steel tower (earthing member) requires as follows: Section 7 and the 6th Section is 1.3m, and Section 6 and Section 5 are 2.6m, and Section 5 and Section 4 are 3.9m, and Section 4 and Section 3 are 5.2m.When arrester by Wind and along line direction to when steel tower side oscillation, underneath hinges fitting 6 can tense, arrester flange and steel tower (ground connection after tension Part) distance to meet safety clearance value, so that it is determined that choosing the length (L2) that the outer fixing end 11 of bracket is stretched out from tower body outside and being 8.5m。

Outer fixing end 11 chooses 1 base triangle length (L3) of bracket, straight line from cross-arm central cross deflected length (L1) outside For tower earth wire rack hanging point away from conducting wire cross-arm height (H2), the length difference on these directions, which can pass through, adjusts hinge fitting length, real Now the outer distance for choosing bracket 1 to conducting wire 5 is suitable with the length of arrester 3.

Tangent tower pattern	L1(m)	L2(m)	H1(m)	L3(m)	H2(m)
						Z30102B2L-71	14.631	8.5	8.2	1.0	11.5
Z30102B2-75	14.585	8.5	8.0	1.4	11.5

Arrester 3 is chosen on bracket outside hanging on, and when being located at right above conducting wire, arrester low-pressure end (upper end) is using hinge gold Tool connection.Fig. 8-9 is please referred to, 2 structure of upper hinge fitting designed by the utility model is sequentially EB hanging plate 21 from top to bottom, U-shaped ring 22 extends ring 23, U-shaped ring 22, DB adjustment plate 24, U-shaped ring 22, U-shaped ring 22；DB adjustment plate 24 therein is equipped at least One idle hanging hole.DB adjustment plate 24, more important is when dismounting arrester, provides in addition to playing adjustment effect for crane lifting Idle hanging hole.Wherein other fitting combinations also can be used in upper hinge fitting, need to only guarantee to realize outer bracket 1 of choosing to leading The distance of line 5 is suitable with the length of arrester 3.

To protect drainage thread, hinge fitting used by coupling to arrester high-voltage end (lower end) with conducting wire is set Meter, as shown, the structure of underneath hinges fitting 6 is sequentially U type ring 22 from top to bottom, U-shaped ring 22, PT adjustment plate 62, DB tune Whole plate 24, U-shaped ring 22 extend ring 23, U-shaped ring 22, dedicated yoke plate 7.Wherein other fittings also can be used in underneath hinges fitting It is suitable with the length of arrester 3 to the distance of conducting wire 5 need to only to guarantee that bracket 1 is chosen in realization outside for combination.

The vertical load of meter and arrester, and consider have when line conductor electric current overload (overload temperature takes 70 DEG C) The extreme operating condition of hinge fitting may be tensed, fitting mechanical strength needs 160kN；Therefore arrester high-voltage end (lower end) protection The underneath hinges fitting intensity of use uses 160kN, the upper hinge fitting intensity that arrester low-pressure end (upper end) suspension uses It is safer to ensure to improve a strength grade, using 210kN.

The bottom of underneath hinges fitting 6 uses the dedicated yoke plate of quadripartion, and dedicated yoke plate and eight split conductors are at the middle and upper levels Four conducting wire connections.The main reason for yoke plate dedicated using quadripartion: dedicated when on the one hand being put in view of arrester with conducting wire wind The wire clamp of yoke plate can securely hold conducting wire and not loosen；On the other hand, it when considering the overload of line conductor electric current, may draw Under the extreme operating condition of tight hinge fitting, the mechanical strength of arrester and fitting is able to bear the downward vertical tension of unilateral conducting wire.

And the dedicated yoke plate of the utility model uses preformed armor rods wire clamp, main cause is according to conventional conductor spacer line Folder, when arrester is put with conducting wire wind, wire clamp stress converges, and wire clamp edge easily cuts damage conducting wire；If with regular intervals stick line Folder is the same, adds rubber-covered pad in wire clamp inner wall increasing, and can cause drainage thread and fitting that corona phenomenon occurs, and comprehensively considers use The mode of preformed armor rods wire clamp can make stress be uniformly distributed in this way, while preformed armor rods good conductor again can be to avoid corona phenomenon.

As shown in figure 12, the single lug grip of the wind load of meter and arrester, preformed armor rods wire clamp is not less than 2.5kN, single line Axis (cross) is pressed from both sides to, oblique intensity not less than 2.5kN；Other requirements such as centripetal force and torsion grip square and conductor spacer used in engineering FJZ-855/48D is identical；Meter and arrester vertical load and conductors on quad bundled unilateral side span vertical load, single lug vertical force is not Less than 40kN, dedicated yoke plate is integrally not less than 160kN by vertical force；Connection size is matched with U-16.

Under normal conditions, the electric current for flowing through arrester drainage thread is 300-500A.Compared with steel-cored aluminium strand, it is proposed that use Flexible preferable aluminum stranded conductor or copper wire.Aluminum stranded conductor and hot galvanizing material comparison match, are not likely to produce galvano-cautery, and the how easy oxygen of copper wire Change corrosion, therefore the utility model uses JL-300 aluminum stranded conductor, current-carrying capacity 550A is met the requirements.

It is influenced to reduce corona, the utility model uses two drainage threads 8.As shown in Fig. 3 and Fig. 8-11, drainage thread 8 Lower end is crimped by hydraulic way with TL type wire clamp 81, and TL cable clip bolt section is mounted on eight points between arrester 3 and tangent tower It splits on the sub-conductor of conducting wire upper layer.The upper end of drainage thread 8 is coupled using the hydraulic shaped cable clamp 82 of SY with 3 high-voltage end of arrester (lower end), The inclination angle of SY drainage plate is 30 °.The length of drainage thread 8, which is subject to, is slightly longer than underneath hinges fitting 6, i.e. 8 pine of holding drainage thread Relaxation does not stress.

Claims (8)

1. one kind ± 1100KV DC line tangent tower arrester device, fixed on tangent tower tower body it includes tangent tower tower body There is conducting wire cross-arm, conducting wire cross-arm is connected with conducting wire (5), which is characterized in that includes at least:

Choose bracket (1) outside, it is described it is outer choose bracket (1) and extended obliquely upward from tangent tower conducting wire cross-arm, be in conducting wire (5) In one vertical plane, top is located at the surface of conducting wire (5)；

Arrester (3), the low-pressure end of the arrester (3) is hung on to be chosen on bracket (1) outside, the high-voltage end connection of arrester (3) In conducting wire (5)；

The lower end of drainage thread (8), the drainage thread (8) is all connected to conducting wire (5), and the upper end of drainage thread (8) connects arrester (3) High-voltage end.

2. ± 1100KV DC line tangent tower arrester device as described in claim 1, which is characterized in that choose branch outside described The top of frame (1) is set outer fixing end (11), and arrester (3) is suspended on outer fixing end (11), and outer fixing end (11) arrives conducting wire (5) Vertical range and the length of arrester (3) match.

3. ± 1100KV DC line tangent tower arrester device as claimed in claim 2, which is characterized in that the arrester (3) it is divided into 7 sections from top to bottom, every section length 2.8m uses flanged joint between section and section, three section flange outer sleeve of lower part, which has, presses The air gap distance of ring, flange and grading ring and tangent tower tower body meets the requirement of safety clearance value.

4. ± 1100KV DC line tangent tower arrester device as claimed in claim 2, which is characterized in that the arrester (3) low-pressure end is hung on outer fixing end (11) by upper hinge fitting (2), and the upper hinge fitting (2) is from top to bottom Successively include: EB hanging plate (21), U-shaped ring (22) extend ring (23), U-shaped ring (22), DB adjustment plate (24), and U-shaped ring (22) is U-shaped Ring (22), DB adjustment plate (24) therein are equipped at least one idle hanging hole.

5. ± 1100KV DC line tangent tower arrester device as described in claim 1, which is characterized in that the arrester (3) high-voltage end is connected on conducting wire (5) by underneath hinges fitting (6), which successively wraps from top to bottom Contain: U-shaped ring (22), U-shaped ring (22), PT adjustment plate (62), DB adjustment plate (24), U-shaped ring (22) extend ring (23), U-shaped ring (22).

6. ± 1100KV DC line tangent tower arrester device as claimed in claim 5, which is characterized in that the lower part hinge The bottom of chain fitting (6) is equipped with dedicated yoke plate (7), and four of the dedicated yoke plate (7) split payment to a porter folder using preformed armor rods wire clamp.

7. ± 1100KV DC line tangent tower arrester device as described in claim 1, which is characterized in that the arrester (3) high-voltage end connects two drainage threads (8) by the hydraulic shaped cable clamp of SY (82), and the drainage plate of the hydraulic shaped cable clamp of the SY (82) inclines Oblique angle is 30 °.

8. ± 1100KV DC line tangent tower arrester device as described in claim 1, which is characterized in that the drainage thread (8) lower end is connected on conducting wire (5) by TL type wire clamp (81).