CN203632182U - Lightning protection device of 20kV overhead line - Google Patents

Lightning protection device of 20kV overhead line Download PDF

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Publication number
CN203632182U
CN203632182U CN201320702098.6U CN201320702098U CN203632182U CN 203632182 U CN203632182 U CN 203632182U CN 201320702098 U CN201320702098 U CN 201320702098U CN 203632182 U CN203632182 U CN 203632182U
Authority
CN
China
Prior art keywords
lightning
line
protection device
lightning protection
transmission line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201320702098.6U
Other languages
Chinese (zh)
Inventor
吴杰
潘奡旻
张卫国
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Jiaxing Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Jiaxing Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Jiaxing Power Supply Co of State Grid Zhejiang Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201320702098.6U priority Critical patent/CN203632182U/en
Application granted granted Critical
Publication of CN203632182U publication Critical patent/CN203632182U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

Provided is a lightning protection device of a 20kV overhead line. The 20kV overhead line includes a 20kV trunk line adopting 185mm<2> and 240 mm<2> insulated wires, and 20kV branch wires adopting 70-120mm<2> insulated wires. An overhead lightning wire composed of a coupling ground wire is erected on the 20kV trunk line, and the two sides of equipment on the 20kV trunk line are additionally equipped with a 20kV arrester respectively. On the trunk line of the 20kV overhead line, each base pole is equipped with a grounding device, and the grounding resistance is not greater than 10 ohms. The 20kV branch wire is equipped with a gapped zinc oxide arrester and a re-closing circuit breaker, and the re-closing circuit breaker is installed at the beginning side of a large branch. The lightning protection device has the characteristics of being simple in structure, convenient in use and installation, capable of effectively reducing lightning impact wave and lightning-induced over-voltage and reducing the lightning fault probability of the line, and the like.

Description

A kind of lightning protection device of 20kV overhead transmission line
Technical field
The utility model relates to a kind of special lightning protection device for 20kV overhead transmission line, belong to the safe lightning-protecting engineering field of 20kV power distribution network.
Background technology
The circuit of 20kV electric pressure compared with 10kV circuit have that line powering ability is strong, radius of electricity supply and supply district large, save construction investment, save the obviously advantage such as soil data.Although the circuit of 20kV electric pressure has plurality of advantages, in the operation of built 20kV rack, also exist a lot of difficult points and problem, for example bird pest and damage to crops caused by thunder are exactly the main cause that affects the safe operation of 20kV rack.At present on electric distribution network overhead wire, conventional lightning protection measures has following several: adopt zinc oxide arrester, lay arc-preventing metal utensil, mounting strap gap zinc oxide arrester and adopt anti-thunder insulator etc., these lightning protection measuress in actual use, all exist such or such deficiency, especially in the new electric pressure getting involved of distribution---the application on 20kV voltage overhead transmission line.Because the lightning protection of 20kV overhead transmission line is mainly to prevent from causing line facility fault after Lightning Over-voltage, as Broken of Overhead Insulation Lines By Lightning, subscriber equipment damage and secondary disaster etc., and have influence on the electrical network of upper level.Prevent that at present Lightning Over-voltage from having influence on the lightning measure that the electrical network of upper level takes conventionally and being: in electric substation, arrange the method that lightning arrester matches is set outside automatic reclosing and electric substation; But for the comparatively difficulty of this line equipment fault that prevents that thunderbolt from causing.
Summary of the invention
The purpose of this utility model is to overcome the deficiency that prior art exists, and provides a kind of simple in structure, easy to install and use, and the impact that can effectively reduce thunder and lightning involves lightning induced voltage, reduces the lightning protection device of the 20kV overhead transmission line of circuit lightning fault probability.
The purpose of this utility model completes by following technical solution, and described 20kV overhead transmission line comprises employing 185mm 2, 240mm 2the 20kV basic routing line of insulated conductor and employing 70mm 2-120mm 2the 20kV branch line wire of insulated conductor, at the added overhead ground wire being made up of coupling ground wire that is provided with of 20kV backbone, the both sides of the equipment on 20kV backbone add 20kV lightning arrester.
On the basic routing line of described 20kV overhead transmission line, wherein every base electric pole is all installed earthing device, and earth resistance is not more than 10 Ω.
On described 20kV branch line wire, be equiped with band gap zinc oxide arrester and band coincidence circuit breaker; Wherein said band coincidence circuit breaker is arranged on the beginning side of large branch line.
Described equipment comprises load beginning and cable penetration on post; Above or below insulated conductor, set up the built on stilts coupling ground wire that three-phase conducting wire is all played to the effect of shielding.
The utility model be guarantee safe distance in situation, above or below insulated conductor, set up built on stilts (coupling) ground wire, make it all play the effect of shielding to three-phase conducting wire, and by the segmentation ground connection of induction lightning conducter, and from insulated conductor very close to, near electromagnetic field insulated conductor is changed.In the time of thunderbolt circuit, on insulated conductor, induction lightening is pressed significantly and is reduced, thereby has reduced the lightning-caused breaking rate of lightning stroke flashover probability and the insulated conductor of circuit.
The impact that the utility model can effectively reduce thunder and lightning involves lightning induced voltage, reduces circuit lightning fault probability; Better economy, cost is light, especially in double loop and above installation lightning conducter cost more light than lightning protection hardware is installed, and do not destroy conductive line surfaces structure; Take every base electric pole all to carry out effective grounding, form a ground network by lightning conducter, reduce earth resistance, effectively draw thunder and enter ground; Have simple in structurely, easy to install and use, the impact that can effectively reduce thunder and lightning involves lightning induced voltage, reduces the features such as circuit lightning fault probability.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail: shown in Fig. 1,20kV overhead transmission line described in the utility model comprises employing 185mm 2, 240mm 2the 20kV basic routing line 1 of insulated conductor and employing 70mm 2-120mm 2the 20kV branch line wire of insulated conductor, at the added overhead ground wire 2 being made up of coupling ground wire 3 that is provided with of 20kV basic routing line 1, the both sides of the equipment (as: load beginning, cable penetration on post) on 20kV backbone 1 add 20kV lightning arrester.
On the basic routing line 1 of described 20kV overhead transmission line, wherein every base electric pole is all installed earthing device, and earth resistance is not more than 10 Ω.
On described 20kV branch line wire, be equiped with band gap zinc oxide arrester and band coincidence circuit breaker; Wherein said band coincidence circuit breaker is arranged on the beginning side of large branch line.
Described equipment comprises load beginning and cable penetration on post; Above or below insulated conductor, set up the built on stilts coupling ground wire 3 that three-phase conducting wire is all played to the effect of shielding.
Although 20kV circuit has more advantage, also have some limitations simultaneously, such as transformation difficulty is large, also imperfection etc. of earthing mode, this has a certain impact to 20kV line thunder protection.
along with applying of 20kV power distribution network, the manufacturing technology of its equipment will obtain tremendous development.Safe, the healthy operation of rack will receive increasing concern; High-quality, safety, reliability service that the utility model is 20kV rack provide stronger guarantee.

Claims (4)

1. a lightning protection device for 20kV overhead transmission line, described 20kV overhead transmission line comprises employing 185mm 2, 240mm 2the 20kV basic routing line of insulated conductor and employing 70mm 2-120mm 2the 20kV branch line wire of insulated conductor, is characterized in that: at the added overhead ground wire being made up of coupling ground wire that is provided with of 20kV backbone, the both sides of the equipment on 20kV backbone add 20kV lightning arrester.
2. the lightning protection device of 20kV overhead transmission line according to claim 1, is characterized in that on the basic routing line of described 20KV overhead transmission line, wherein every base electric pole is all installed earthing device, and earth resistance is not more than 10 Ω.
3. the lightning protection device of 20kV overhead transmission line according to claim 1, is characterized in that being equiped with band gap zinc oxide arrester and being with coincidence circuit breaker on described 20kV branch line wire; Wherein said band coincidence circuit breaker is arranged on the beginning side of large branch line.
4. the lightning protection device of 20kV overhead transmission line according to claim 1, is characterized in that described equipment comprises load beginning and cable penetration on post; Above or below insulated conductor, set up the built on stilts coupling ground wire that three-phase conducting wire is all played to the effect of shielding.
CN201320702098.6U 2013-11-08 2013-11-08 Lightning protection device of 20kV overhead line Expired - Fee Related CN203632182U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320702098.6U CN203632182U (en) 2013-11-08 2013-11-08 Lightning protection device of 20kV overhead line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320702098.6U CN203632182U (en) 2013-11-08 2013-11-08 Lightning protection device of 20kV overhead line

Publications (1)

Publication Number Publication Date
CN203632182U true CN203632182U (en) 2014-06-04

Family

ID=50818624

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320702098.6U Expired - Fee Related CN203632182U (en) 2013-11-08 2013-11-08 Lightning protection device of 20kV overhead line

Country Status (1)

Country Link
CN (1) CN203632182U (en)

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140604

Termination date: 20201108

CF01 Termination of patent right due to non-payment of annual fee