CN203085306U - Lightning arrester for preventing lightning by neutral line in process of double circuits on same tower of direct-current transmission neutral line and polar line - Google Patents
Lightning arrester for preventing lightning by neutral line in process of double circuits on same tower of direct-current transmission neutral line and polar line Download PDFInfo
- Publication number
- CN203085306U CN203085306U CN2013200544980U CN201320054498U CN203085306U CN 203085306 U CN203085306 U CN 203085306U CN 2013200544980 U CN2013200544980 U CN 2013200544980U CN 201320054498 U CN201320054498 U CN 201320054498U CN 203085306 U CN203085306 U CN 203085306U
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- neutral line
- lightning arrester
- lightning
- line
- insulator
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Abstract
The utility model relates to a lightning arrester for preventing lightning by a neutral line in a process of double circuits on the same tower of a direct-current transmission neutral line and a polar line and belongs to the field of an electrician lightning protection technology. The lightning arrester comprises a lightning arrester body, an upper metal discharging ring, a lower metal discharging ring and an insulator, wherein the lightning arrester body, the upper metal discharging ring, the lower metal discharging ring and the insulator are coaxially mounted from top to bottom; the upper metal discharging ring and the lower metal discharging ring are respectively sleeved on the upper part and the lower part of the insulator; the upper end of the lightning arrester body is connected with a neutral line of a direct-current power transmission network through a connection piece; and the lower end of the insulator is connected with an iron tower of the power transmission network. The lightning arrester for preventing the lightning by the neutral line in the process of double circuits on the same tower of the direct-current transmission neutral line and the polar line disclosed by the utility model has the advantages that the lightning arrester does not influence the normal operation of the line when the line is normally operated; and when a lightning stroke happens, the lightning arrester starts to work to limit voltage on the neutral line, so as to guarantee that the insulator of the neutral line does not flashover and the line is normally operated.
Description
Technical field
The lightning arrester of neutral line lightning protection when the utility model relates to a kind of direct current transportation neutral line and polar curve parallel lines on same tower belongs to electrician's shocking preventing technology field.
Background technology
Thunder and lightning is the recurrent a kind of atmospheric discharge phenomenon of nature.It causes significant impact to the operation of electric power system.When stronger thunder and lightning transmission line of lightning strike, cause power outage thereby tripping operation generally can take place circuit.Along with the raising of voltage class of electric power system, the height of transmission line is more and more higher, thus the accident of easy more generation transmission line of lightning strike lead, and this claims thunderbolt in electric power system.Along with China's transferring electricity from the west to the east implementation, super, extra-high voltage direct-current transmission engineering has in China and much builds up and move, because the circuit corridor is limit, the phenomenon of the neutral line and circuit polar curve parallel lines on same tower occurred in the engineering that has.This is aspect lightning protection, a new problem has appearred, be exactly when back flashover or shielding circuit polar curve, because the neutral line is nearer with the polar curve that is struck by lightning, the induction overvoltage that produces on the neutral line is bigger, can cause its insulation along the line that multiple spot flashover phenomenon takes place, and form long-time electric arc, finally cause the major accident of direct current system bipolar locking.
Summary of the invention
The purpose of this utility model is the lightning arrester of neutral line lightning protection when proposing a kind of direct current transportation neutral line and polar curve parallel lines on same tower, the lightning protection problem of the neutral line during with solution direct current transportation net mesohigh direct-current polar and neutral line parallel lines on same tower avoids the bipolar locking accident to take place.
The lightning arrester of the neutral line lightning protection when direct current transportation neutral line that the utility model proposes and polar curve parallel lines on same tower, comprise lightning arrester body, last metal discharge ring, following metal discharge ring and insulator, described lightning arrester body, upward metal discharge ring, metal discharge ring and the coaxial from top to bottom installation of insulator down, last metal discharge ring and following metal discharge ring are set in the upper and lower of described insulator; The upper end of described lightning arrester body links to each other by the neutral line of connector with the direct current transportation net, and the lower end of described insulator links to each other with the iron tower of power transmission network.
The lightning arrester of the neutral line lightning protection when direct current transportation neutral line that the utility model proposes and polar curve parallel lines on same tower, its advantage is that circuit is when normally moving, lightning arrester does not influence the normal operation of circuit, when thunderbolt takes place, lightning arrester is devoted oneself to work, with the voltage limit on the neutral line, the insulator of the assurance neutral line is flashover not, and circuit normally moves.
Description of drawings
The structural representation of the lightning arrester of neutral line lightning protection when Fig. 1 is the direct current transportation neutral line that the utility model proposes and polar curve parallel lines on same tower.
Among Fig. 1, the 1st, lightning arrester body, the 2nd, last metal discharge ring, the 3rd, following metal discharge ring, the 4th, insulator.
Embodiment
The lightning arrester of the neutral line lightning protection when direct current transportation neutral line that the utility model proposes and polar curve parallel lines on same tower, its structure comprise lightning arrester body 1, last metal discharge ring 2, following metal discharge ring 3 and insulator 4 as shown in Figure 1.Lightning arrester body 1, upward metal discharge ring 2, metal discharge ring 3 and the coaxial from top to bottom installation of insulator 4 down, last metal discharge ring 2 and following metal discharge ring 3 are set in the upper and lower of insulator 4.The upper end of lightning arrester body 1 links to each other by the neutral line of connector with the direct current transportation net, and the lower end of insulator 4 links to each other with the iron tower of power transmission network.
In the lightning arrester that the utility model proposes, lightning arrester body 1 is made of a plurality of ZnO valve plates, and insulator 4 is made by silicon rubber and epoxy resin plug.
Introduce the operation principle and the course of work of the lightning arrester that the utility model proposes in detail below in conjunction with accompanying drawing:
In the lightning arrester of the present utility model, constitute the air gap between two upper and lower beckets.When the transmission line operate as normal, power-frequency voltage or switching overvoltage all act on the air gap that constitutes between the upper and lower becket, and the electric current that flows through the lightning arrester body ZnO valve plate is zero.When lightning overvoltage is come interim, the air gap that constitutes between the upper and lower becket is breakdown, and the ZnO valve plate that constitutes lightning arrester body puts into operation, the overvoltage that restriction is caused by thunder and lightning, guaranteed not flashover of power transmission network neutral line insulator, transmission line normally moves.
Lightning arrester of the present utility model, its running parameter is relevant with DC power transmission line, under polar curve and neutral line parallel lines on same tower situation, during normal the operation, the neutral line can be because electrostatic induction has certain voltage, be used for isolated this power-frequency voltage by the air gap that constitutes between the upper and lower becket, the ZnO valve plate that constitutes lightning arrester body does not bear electric stress.The size of air gap should guarantee can completely cut off this power-frequency voltage when normal operation.In addition, because the discharge capacity of ZnO valve plate is limited, the air gap should guarantee to be failure to actuate under the system operation overvoltage.The sheet number of ZnO valve plate should be able to guarantee that the residual voltage after lightning arrester moves is lower than the discharge voltage of the used insulator of the neutral line, guarantees not flashover of insulator.
Claims (1)
1. the lightning arrester of the neutral line lightning protection when direct current transportation neutral line and polar curve parallel lines on same tower, it is characterized in that this lightning arrester comprises lightning arrester body, last metal discharge ring, following metal discharge ring and insulator, described lightning arrester body, upward metal discharge ring, metal discharge ring and the coaxial from top to bottom installation of insulator down, last metal discharge ring and following metal discharge ring are set in the upper and lower of described insulator; The upper end of described lightning arrester body links to each other by the neutral line of connector with the direct current transportation net, and the lower end of described insulator links to each other with the iron tower of power transmission network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200544980U CN203085306U (en) | 2013-01-30 | 2013-01-30 | Lightning arrester for preventing lightning by neutral line in process of double circuits on same tower of direct-current transmission neutral line and polar line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200544980U CN203085306U (en) | 2013-01-30 | 2013-01-30 | Lightning arrester for preventing lightning by neutral line in process of double circuits on same tower of direct-current transmission neutral line and polar line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203085306U true CN203085306U (en) | 2013-07-24 |
Family
ID=48831122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013200544980U Expired - Fee Related CN203085306U (en) | 2013-01-30 | 2013-01-30 | Lightning arrester for preventing lightning by neutral line in process of double circuits on same tower of direct-current transmission neutral line and polar line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203085306U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104022444A (en) * | 2014-06-16 | 2014-09-03 | 山东迅实电气有限公司 | Rod-shaped suspended voltage limiter for overhead line |
| CN104952564A (en) * | 2014-03-27 | 2015-09-30 | 国家电网公司 | Insulator |
| CN106251995A (en) * | 2016-09-12 | 2016-12-21 | 红光电气集团有限公司 | A kind of anti-lightening protector |
-
2013
- 2013-01-30 CN CN2013200544980U patent/CN203085306U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104952564A (en) * | 2014-03-27 | 2015-09-30 | 国家电网公司 | Insulator |
| CN104022444A (en) * | 2014-06-16 | 2014-09-03 | 山东迅实电气有限公司 | Rod-shaped suspended voltage limiter for overhead line |
| CN106251995A (en) * | 2016-09-12 | 2016-12-21 | 红光电气集团有限公司 | A kind of anti-lightening protector |
| CN106251995B (en) * | 2016-09-12 | 2018-09-21 | 红光电气集团有限公司 | A kind of anti-lightening protector |
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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: 20130724 Termination date: 20170130 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |