CN204349213U - A kind of lightning stroke flashover restraint device for 220kV transmission line of alternation current - Google Patents
A kind of lightning stroke flashover restraint device for 220kV transmission line of alternation current Download PDFInfo
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- CN204349213U CN204349213U CN201520071804.0U CN201520071804U CN204349213U CN 204349213 U CN204349213 U CN 204349213U CN 201520071804 U CN201520071804 U CN 201520071804U CN 204349213 U CN204349213 U CN 204349213U
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Abstract
The utility model relates to a kind of lightning stroke flashover restraint device for 220kV transmission line of alternation current, it adopts the limiter preventing lightning stroke flashover, prevent the limiter of lightning stroke flashover from adopting non-linear energy absorption assembly, non-linear energy absorption assembly and parallel connection gaps and special-shaped jockey combine, parallel connection gaps two ends and electrode connect, non-linear energy absorption assembly is connected with parallel connection gaps by electrode, non-linear energy absorption assembly is connected by the fixture of special-shaped jockey and fixed insulation, special-shaped jockey adopts abnormal shape connection board, non-linear energy absorption assembly is made up of shell and nonlinear resistive element, nonlinear resistive element is encapsulated in enclosure, shell is the silicon rubber umbrella with silicon rubber integral injection molding.The utility model has the advantages that, novel, structure is simple, and function admirable is easy for installation, is convenient to implement, and have good drainage, pressure limiting and blow-out effect to the flashover that thunderbolt circuit causes, lightning protection effect is remarkable.
Description
Technical field
The utility model relates to electric power system lightning protection field, particularly a kind of lightning stroke flashover restraint device for 220kV transmission line of alternation current.The utility model is used in 220kV transmission line of alternation current, and it can improve transmission line reliability of operation.
Background technology
Overhead transmission line is power grid construction basis, is the important component part of electric power system, and the huge power delivery that energy centre changes and comes by it is to load center from all directions.At present, China builds by ultra-high/extra-high voltage the electrical network of all kinds of electric pressures being backbone, along with the development of national economy, ultra-high/extra-high voltage transmission line of alternation current is more and more wider in the coverage of China, and become the key supply network in big or middle city gradually, the reliability of its power supply, is directly connected to the national economic development and the quality of residents'life of China.Electric network fault classifiction statistics shows, ultra-high-tension power transmission line is due to the tripping operation number of times that causes of being struck by lightning the line is busy road always trips 40% ~ 70% of number of times.It can thus be appreciated that damage to crops caused by thunder is the one of the main reasons causing transmission line of alternation current fault.Therefore, how preventing and reduce the infringement that thunderbolt transmission line of alternation current is caused electrical network, is the Important Problems that power network safety operation must be considered.
According to the knowledge of the applicant, for HVAC power transmission line lightning stroke flashover restriction technologies, the Institute of Electric Power of China has carried out a large amount of theories, experiment and application study in recent years, has achieved a large amount of scientific and technological achievements.Theoretical research and operating experience show, the existing lightning arrester for 220kV transmission line of alternation current has good lightning protection effect, and does not limit by landform in use, effectively can prevent the lightning stroke flashover of HVAC power transmission line.But, research and operation test find, also there is the problems such as install inconvenience or electric property is unreliable in the lightning arrester of current use, once lose efficacy easily cause the trip accident of transmission line of alternation current, bring potential safety hazard to the operation of transmission line of alternation current in structure, technical parameter design.According to interrelated data introduction, the lightning arrester that 220kV transmission line of alternation current uses mainly comprises pure air gap leakage conductor and insulator fixed interval (FI) leakage conductor.Pure air gap leakage conductor adopts gap to carry out security protection, because gap does not have other objects to support, and pure air gap leakage conductor body dimension and gap size are fixing, must according to shaft tower size and insulator length during installation, the different auxiliary mould of interim processing meets installation requirement.In addition, pure air gap leakage conductor in use can bear larger load for a long time, therefore need to re-start pole and tower design to check and the connected mode of reliable design, too high installation difficulty is used to pure air gap leakage conductor and brings inconvenience, and the lightning arrester of the type is only suitable for being vertically mounted on tangent tower.For the installation limitation that pure air gap leakage conductor exists, researcher's Application and Development insulator fixed interval (FI) leakage conductor.The lightning arrester body of this structure and gap form an entirety, can be arranged on different shaft tower easily at any angle, safeguard and change more for convenience.But, applicant finds the weak point that insulator fixed interval (FI) leakage conductor exists by inquiry, the dispersiveness of the lightning arrester discharge of the type is large and insulator for supporting needs the damage bearing bending load for a long time, easily cause insulator flexural deformation, gap size changes, and finally can cause lightning arrester misoperation or be failure to actuate.Theory analysis and test show, the gap of insulator fixed interval (FI) leakage conductor is under the effect of lightning impulse flashover voltage, air gap electric discharge can be regarded as, but the creeping discharge can only regarded as in power-frequency discharge situation along insulator surface, and test standard does not examine its tolerance to power-frequency voltage under filthy condition at present, cause its actual electric property of having and unreliable, there is certain potential safety hazard.In addition, the composite insulator structure length playing insulating supporting effect is equivalent to about 70% of same electric pressure line insulator, need withstand long term exposure normal working voltage, power-frequency voltage and switching overvoltage, when lightning arrester is damaged, be difficult to ensure that gap flashover does not occur.Although use insulator fixed interval (FI) leakage conductor to solve installation question, also bring the operating potential safety hazard of equipment simultaneously.
According to the magazine " electric ceramic lightning arrester " (2004 about lightning arrester, introduce in " research of the in-problem analysis of current leakage conductor and a kind of Novel line lightning arrester " article 4:21-24) reported, the basis of gapless leakage conductor proposes a kind of Novel line lightning arrester realizing " non-maintaining " function by installing fault detector, heat-explosion type disconnector and suspension auxiliary body additional.Applicant finds after research and analysis, and gapless leakage conductor is directly connected with wire, long-term charging operation, once break down, will directly affect the normal power supply of circuit.And the Novel line lightning arrester of " non-maintaining " function requires to install fault detector, heat-explosion type disconnector and suspension auxiliary body additional, except adding the workload of installation, but also need for the special suspension auxiliary body of pole and tower design, this will make troubles to installation.
Therefore, applicant thinks, for the deficiency that now widely used transmission line lightning stroke flashover protector exists, need and design a kind of lightning stroke flashover restraint device for 220kV transmission line of alternation current newly, to reach better effect, can be improved it in transmission line operational reliability, can in-site installation be facilitated again.
Summary of the invention
The purpose of this utility model is, for the existing lightning stroke flashover protective device Problems existing for 220kV transmission line of alternation current, proposes and studies a kind of lightning stroke flashover restraint device for 220kV transmission line of alternation current.
Technical solution of the present utility model is: adopt the limiter preventing lightning stroke flashover, prevent the limiter of lightning stroke flashover from adopting non-linear energy absorption assembly, it is characterized in that, non-linear energy absorption assembly and parallel connection gaps and special-shaped jockey combine, parallel connection gaps two ends and electrode connect, non-linear energy absorption assembly is connected with parallel connection gaps by electrode, non-linear energy absorption assembly is connected by the fixture of special-shaped jockey and fixed insulation, special-shaped jockey adopts abnormal shape connection board, non-linear energy absorption assembly is made up of shell and nonlinear resistive element, nonlinear resistive element is encapsulated in enclosure, shell adopts the silicon rubber umbrella of silicon rubber integral injection molding.
It is characterized in that, non-linear energy absorption assembly to be connected with parallel connection gaps electrode by electrode and to form the current by pass of thunder-lightning, have employed two groups of non-linear energy absorption assemblies by be connected with the parallel connection gaps electrode current by pass of the thunder-lightning formed of non-linear energy absorption assembly, one end of one group of non-linear energy absorption assembly wherein is connected in by abnormal shape connection board on the fixture of insulator upper end, the other end of this group non-linear energy absorption assembly is connected with one end electrode of parallel connection gaps, connect with another electrode of parallel connection gaps in one end of other one group of non-linear energy absorption assembly, the other end of other one group of non-linear energy absorption assembly is by the fixture of another abnormal shape connection board connecting insulator lower end.
It is characterized in that, fixture adopts link plate or yoke plate.
It is characterized in that, link plate comprises upper end link plate and lower end link plate.
It is characterized in that, yoke plate comprises upper end yoke plate and lower end yoke plate.
It is characterized in that, described non-linear energy absorption assembly adopts voltage gradient 200 ~ 300V/mm, current density 30 ~ 40A/cm
2nonlinear resistance piece element.
It is characterized in that, non-linear energy absorption assembly is installed in parallel on insulator by abnormal shape connection board, can realize the standard integrative installation technology with insulator.
It is characterized in that, the end of abnormal shape connection board connected nonlinearity energy-absorbing assembly is provided with one group of fan-shaped adjustment hole, and fan-shaped adjustment hole is for regulating the clearance distance of parallel connection gaps.
It is characterized in that, the clearance distance span of parallel connection gaps is 950 ± 100mm.
It is to be noted: insulator can be selected single insulator string as required or select two insulator string.When abnormal shape connection board and single insulator string connect, adopt two abnormal shape connection boards, between the U-shaped link that one of them abnormal shape connection board is connected to single insulator string upper end and link plate, between the suspension clamp that another abnormal shape connection board is connected to single insulator string lower end and link plate.When abnormal shape connection board connects with two insulator string, an one abnormal shape connection board is connected on the yoke plate of two insulator string upper end, and its another abnormal shape connection board is connected on the yoke plate of two insulator string lower end, without the need to destroying steel tower original structure.
In addition, non-linear energy absorption assembly adopts voltage gradient 200 ~ 300V/mm, current density 30 ~ 40A/cm
2non-linear resistor, be the working condition requirement in order to meet during the application of above-mentioned contrive equipment.Do like this as a result, while more traditional lightning stroke flashover restraint device volume reduces weight reduce about 20 ~ 30%; Device of the present invention directly can be installed in parallel on the gold utensil of insulator two ends by abnormal shape connection board on the basis that weight significantly reduces, without the need to destroying steel tower original structure and electric, mechanical performance, can realize, with the standard integrative installation technology of insulator, facilitating site operation.
The innovation that the utility model has is: structure is simple, and function admirable is easy for installation, without the need to destroying steel tower original structure, can effectively prevent thunder and lightning to the infringement of ultra-high-tension power transmission line.
The utility model has the advantages that, novel, structure is simple, and function admirable is easy for installation, be convenient to implement, have good drainage, pressure limiting and blow-out effect to the flashover that thunderbolt circuit causes, lightning protection effect is remarkable, for the anti-lightning strike flashover device of tradition, its weight and volume reduces about 20% ~ 30%, can, under the prerequisite ensureing iron tower structure, realize, with the standard integrative installation technology of insulator, facilitating site operation by special-shaped jockey.
Accompanying drawing explanation
Fig. 1, one of concrete structure of the present utility model and scheme of installation.
Fig. 2, concrete structure of the present utility model and scheme of installation two.
The abnormal shape connection board that Fig. 3, the utility model adopt.
The non-thread energy-absorbing assembly that Fig. 4, the utility model adopt.
Fig. 5, traditional lightning protection device structure and installation method schematic diagram.
In figure, 1, steel tower; 2, U-shaped link; 3, upper end yoke plate; 4, upper end link plate; 5, insulator; 6, lower end link plate; 7, lower end yoke plate; 8, suspension clamp; 9, wire; 10, lower different type connecting plate; 11, non-linear energy absorption assembly; 12, electrode; 13, electrode; 14, non-linear energy absorption assembly; 15, upper abnormal shape connection board; 16, fan-shaped adjustment hole; 17, fixing hole; 18, traditional lightning protection device; 19, silicon rubber umbrella; 20, nonlinear resistive element.
Embodiment
Below, with reference to the accompanying drawings, to the further detailed description of embodiment of the present utility model.
The utility model adopts and prevents the limiter of lightning stroke flashover, and this prevents the limiter of lightning stroke flashover from have employed non-linear energy absorption assembly and electrode, and non-linear energy absorption assembly and parallel connection gaps and special-shaped jockey combine accessory.Wherein, non-linear energy absorption assembly is connected with parallel connection gaps by electrode, non-linear energy absorption assembly is connected by special-shaped jockey and insulator, special-shaped jockey comprises fixed connecting piece and abnormal shape connection board, non-linear energy absorption assembly is made up of shell and nonlinear resistive element, and nonlinear resistive element is encapsulated in enclosure; Shell adopts the silicon rubber umbrella of silicon rubber integral injection molding.
As Figure 1 and Figure 4, it designs for 220kV transmission line of alternation current specific embodiment of the utility model one, and it adopts the limiter preventing lightning stroke flashover, and this prevents the limiter of lightning stroke flashover from adopting single insulator string lightning stroke flashover limiter.Single insulator string lightning stroke flashover limiter comprises special-shaped jockey and two groups of non-linear energy absorption assemblies, and the structure of two groups of non-linear energy absorption assemblies is identical, is nonlinear energy absorbent assembly 11 and non-linear energy absorption assembly 14 respectively.The fixture of fixed insulation 5 adopts two pieces of link plates, different by respective installation site, is respectively upper end link plate 4 and lower end link plate 6.Special-shaped jockey adopts two abnormal shape connection boards, is respectively lower different type connecting plate 10 and upper abnormal shape connection board 15.Wherein, non-linear energy absorption assembly 14 upper end is connected with upper abnormal shape connection board 15, and is connected on steel tower 1.Between the U-shaped link 2 that abnormal shape connection board 15 is installed on insulator 5 upper end and upper end link plate 4; The lower end of its non-linear energy absorption assembly 14 is connected with the electrode 13 of parallel connection gaps upper end, the electrode 12 of parallel connection gaps lower end is connected with the upper end of another non-linear energy absorption assembly 11, the lower end of non-linear energy absorption assembly 11 is connected with lower different type connecting plate 10, between the lower end link plate 6 that lower different type connecting plate 10 is installed on insulator 5 lower end and suspension clamp 8; And be connected on wire 9.Insulator 5 adopts single insulator string.Non-linear energy absorption assembly 11,14 is made up of shell and nonlinear resistive element, and nonlinear resistive element is encapsulated in enclosure; Shell silicon rubber integral injection molding.
Embodiment two: as shown in Figure 2, Figure 4 shows, it designs for 220kV transmission line of alternation current, and it adopts the limiter preventing lightning stroke flashover, and this prevents the limiter of lightning stroke flashover from adopting two insulator string lightning stroke flashover limiter.Two insulator string lightning stroke flashover limiter comprises special-shaped jockey and two groups of non-linear energy absorption assemblies, and two groups of non-linear energy absorption assemblies of employing are nonlinear energy absorbent assembly 11 and non-linear energy absorption assembly 14 respectively.The fixture of fixed insulation 5 have employed two pieces of yoke plates, different by respective installation site, is respectively upper end yoke plate 3 and lower end yoke plate 7.Special-shaped jockey adopts two abnormal shape connection boards, is respectively lower different type connecting plate 10 and upper abnormal shape connection board 15.Wherein, non-linear energy absorption assembly 14 upper end is connected with upper abnormal shape connection board 15, and upper abnormal shape connection board 15 is installed on the upper connective plate 3 of fixed insulation 5 upper ends; The lower end of non-linear energy absorption assembly 14 is connected with the electrode 13 of parallel connection gaps upper end, the electrode 12 of parallel connection gaps lower end is connected with the upper end of non-linear energy absorption assembly 11, the lower end of non-linear energy absorption assembly 11 is connected with lower different type connecting plate 10, wherein abnormal shape connection board 10 is installed on the lower end yoke plate 7 of insulator 5 lower end, and is connected on wire 9.Insulator 5 is two insulator strings.Non-linear energy absorption assembly 11,14 is made up of shell and nonlinear resistive element, and nonlinear resistive element 20 is encapsulated in enclosure.Shell silicon rubber integral injection molding.
What it should be noted that the distance of parallel connection gaps should meet thunder impulse discharge characteristics and insulator coordinates requirement, meets switching impulse tolerance, power frequency withstand ability and arc-rupturing capacity again.So the span of the spacing of the parallel connection gaps of the limiter of lightning stroke flashover of preventing being applied to 220kV transmission line of alternation current is 950 ± 100mm, considers the adjustable surplus of above-mentioned gap on shaft tower, so the adjustable range of requirement ± 100mm is the most suitable.In order to reach above-mentioned requirements, adopting and fan-shaped adjustment hole 16 and fixing hole 17 are set at lower different type connecting plate 10 and upper abnormal shape connection board 15.Abnormal shape connection board as shown in Figure 5, its one end be connected with non-linear energy absorption assembly 11, non-linear energy absorption assembly 14 or parallel connection gaps bottom electrode 12 arranges fan-shaped adjustment hole 16 and fixing hole 17, has the fan-shaped adjustment hole 16 of 7 spacing 15 ° above fixing hole 17.Wherein, when lower different type connecting plate 10 is connected with the fixture of fixed insulation 5 with upper abnormal shape connection board 15, bolt or anchor ear two kinds of forms can be adopted.
As shown in Figure 4, non-linear energy absorption assembly 11 and non-linear energy absorption assembly 14 have employed nonlinear resistive element 20, and nonlinear resistive element 20 is greater than 30-40A/cm by electric potential gradient 200-300V/mm, current density
2nonlinear resistance piece element composition, while more traditional lightning stroke flashover restraint device volume reduces, weight reduces about 20-30%; The nonlinear resistive element 20 of non-linear energy absorption assembly 11 and non-linear energy absorption assembly 14 is contained in shell, and shell adopts the silicon rubber umbrella 19 of silicon rubber integral injection molding, can reach higher sealing property and external insulation performance.Nonlinear resistive element 20 is contained in silicon rubber umbrella 19.
As shown in Figure 5, traditional lightning protection device 18 is in parallel with insulator 5, is installed between steel tower 1 and wire 9, needs installing and connecting apparatus on steel tower 1 to fix traditional lightning protection device 18, the Heavy Weight of jockey, causes adverse effect to the structure of steel tower 1 and mechanical strength.Therefore, Specialty Design mechanism is needed to carry out mounting design before the mounting.For traditional lightning protection device 18, the utility model then avoids this problem.This is because the utility model adopts Large Copacity, high-potential gracient non-linear energy absorption assembly.Apparatus structure of the present invention is reasonable, and volume is little, lightweight, therefore, it is possible to be directly installed on the fixture of fixed insulation 5, this kind of connected mode easily realizes.Its advantage is: traditional thunder resisting equipment can be avoided to be installed on steel tower 1 and impact it, even destroy original structure.Standard integratedization supporting with insulator can be realized to install simultaneously, reduce on-site installation work amount.
Device of the present utility model solves traditional thunder resisting equipment 18 Problems existing shown in Fig. 5.What the utility model adopted prevents the technical parameter of the limiter performance of lightning stroke flashover as table 1:
The technical parameter preventing the limiter performance of lightning stroke flashover that table 1 the utility model adopts
Claims (9)
1. the lightning stroke flashover restraint device for 220kV transmission line of alternation current, adopt the limiter preventing lightning stroke flashover, prevent the limiter of lightning stroke flashover from adopting non-linear energy absorption assembly, it is characterized in that, non-linear energy absorption assembly and parallel connection gaps and special-shaped jockey combine, parallel connection gaps two ends and electrode connect, non-linear energy absorption assembly is connected with parallel connection gaps by electrode, non-linear energy absorption assembly is connected by the fixture of special-shaped jockey and fixed insulation (5), special-shaped jockey adopts abnormal shape connection board, non-linear energy absorption assembly is made up of shell and nonlinear resistive element (20), nonlinear resistive element (20) is encapsulated in enclosure, shell adopts the silicon rubber umbrella (19) of silicon rubber integral injection molding.
2. a kind of lightning stroke flashover restraint device for 220kV transmission line of alternation current according to claim 1, it is characterized in that, non-linear energy absorption assembly is connected with parallel connection gaps electrode and forms the current by pass of thunder-lightning, have employed two groups of non-linear energy absorption assemblies by be connected with the parallel connection gaps electrode current by pass of the thunder-lightning formed of non-linear energy absorption assembly, one end of one group of non-linear energy absorption assembly wherein is connected in by abnormal shape connection board on the fixture of insulator (5) upper end, the other end of this group non-linear energy absorption assembly is connected with one end electrode of parallel connection gaps, connect with another electrode of parallel connection gaps in one end of other one group of non-linear energy absorption assembly, the other end of other one group of non-linear energy absorption assembly is by the fixture of another abnormal shape connection board connecting insulator (5) lower end, described prevents the limiter of lightning stroke flashover for 220kV transmission line of alternation current.
3. a kind of lightning stroke flashover restraint device for 220kV transmission line of alternation current according to claim 1, is characterized in that, fixture adopts link plate or yoke plate.
4. a kind of lightning stroke flashover restraint device for 220kV transmission line of alternation current according to claim 3, is characterized in that, link plate comprises upper end link plate (4) and lower end link plate (6).
5. a kind of lightning stroke flashover restraint device for 220kV transmission line of alternation current according to claim 3, is characterized in that, yoke plate comprises upper end yoke plate (3) and lower end yoke plate (7).
6. a kind of lightning stroke flashover restraint device for 220kV transmission line of alternation current according to claim 1, is characterized in that, described non-linear energy absorption assembly adopts voltage gradient 200 ~ 300V/mm, current density 30 ~ 40A/cm
2nonlinear resistance piece element.
7. a kind of lightning stroke flashover restraint device for 220kV transmission line of alternation current according to claim 1, it is characterized in that, non-linear energy absorption assembly is installed in parallel on insulator (5) by abnormal shape connection board, can realize the standard integrative installation technology with insulator (5).
8. a kind of lightning stroke flashover restraint device for 220kV transmission line of alternation current according to claim 1, it is characterized in that, the end of abnormal shape connection board connected nonlinearity energy-absorbing assembly is provided with one group of fan-shaped adjustment hole (16), and fan-shaped adjustment hole (16) is for regulating the clearance distance of parallel connection gaps.
9. a kind of lightning stroke flashover restraint device for 220kV transmission line of alternation current according to claim 1 or 8, is characterized in that, the span of the clearance distance of parallel connection gaps is 950 ± 100mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520071804.0U CN204349213U (en) | 2015-02-02 | 2015-02-02 | A kind of lightning stroke flashover restraint device for 220kV transmission line of alternation current |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520071804.0U CN204349213U (en) | 2015-02-02 | 2015-02-02 | A kind of lightning stroke flashover restraint device for 220kV transmission line of alternation current |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105610050A (en) * | 2016-02-24 | 2016-05-25 | 重庆西鹏汇德电力设备制造有限公司 | Continuous adjustable universal lightning protection apparatus equipped with parallel gaps |
-
2015
- 2015-02-02 CN CN201520071804.0U patent/CN204349213U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105610050A (en) * | 2016-02-24 | 2016-05-25 | 重庆西鹏汇德电力设备制造有限公司 | Continuous adjustable universal lightning protection apparatus equipped with parallel gaps |
| CN105610050B (en) * | 2016-02-24 | 2017-05-03 | 重庆西鹏汇德电力设备制造有限公司 | Continuous adjustable universal lightning protection apparatus equipped with parallel gaps |
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Effective date of registration: 20160615 Address after: 100000 Beijing West Chang'an Avenue No. 86 Patentee after: State Grid Corporation of China Patentee after: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Patentee after: STATE GRID JIANGXI ELECTRIC POWER COMPANY Address before: 430074 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 143 Patentee before: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute |