CN102694360A - Lightning-protection system of equipment and facilities of container yard - Google Patents
Lightning-protection system of equipment and facilities of container yard Download PDFInfo
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- CN102694360A CN102694360A CN2012101939516A CN201210193951A CN102694360A CN 102694360 A CN102694360 A CN 102694360A CN 2012101939516 A CN2012101939516 A CN 2012101939516A CN 201210193951 A CN201210193951 A CN 201210193951A CN 102694360 A CN102694360 A CN 102694360A
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Abstract
The invention relates to a lightning-protection system of equipment and facilities of a container yard, comprising a direct lightning-protection device and an indirect lightning-protection device. The direct lightning-protection device is characterized in that a pre-sparking lightning conductor and a lightning conductor for protecting a slide wire from direct lightning are mounted at the top of an iron tower; a needle-conductor direct lightning-protection combined body is formed by connecting the iron tower and the lightning conductor through an iron tower body; the indirect lightning-protection device is characterized in that a first-stage surge absorbing device is mounted on a slide wire support iron tower; a power supply incoming line box is provided with a first-stage surge absorbing device; and a power supply room is provided with a second-stage surge absorbing device. The lightning-protection system can rapidly form a discharging phenomenon at the top of the lightning conductor when a lightning stroke region of thunder clouds is formed above a harbor area; and the first-stage surge absorbing devices can control residual voltage of a line within 2.5 kV and the second-stage surge absorbing device can control residual voltage of the line within 1.6 kV.
Description
Technical field
The present invention relates to a kind of lightning protection device, especially a kind of lightning-protection system that is used for Container Yard.
Background technology
At present, container piling site tyre hoister oil changes the successful implementation of electric project, greatly reduces the energy consumption of tyre crane, has improved the black smoke discharging and the noise problem of tyre crane.But at thunderstorm season; It is high relatively that oil changes the thunderstruck probability of electric system; Though corresponding direct lighting stroke protective device has been installed on beacon, overhead trolley top, these direct lighting stroke protective devices are perfect not enough, and it is also perfect inadequately that the oil on the Container Yard changes the lightning protection device that electric system installs; This makes whole oil change the fail safe of electric system, reliability has reduced, and has influenced the operational efficiency that thunderstorm season oil changes electric system.
For this reason; Oil changes improving of electric system lightning protection device and can solve thunder and lightning oil is changed the specific question that electric system threatens; The security reliability of raising system; Reduce oil and change the thunderstruck risk of electric system, oil is changed the safe and reliable operation of electric system, improve serviceability rate and utilization rate and play important effect.
Oil changes the electric system lightning protection device can be adopted:
(1) the directly protection of thunder
Direct lightning strike is the thunder discharge phenomenon that takes place between thundercloud and the earth; When thundercloud during near ground; Because the electrostatic induction effect makes ground induce the charges of different polarity, exists huge electric field between the two, because the CHARGE DISTRIBUTION in the thundercloud is inhomogeneous and the earth is also uneven.Make the non-uniform electric between thundercloud and the earth, general ground high spot electric field is stronger.When reaching, electric field strength (25-30kv/cm) time, the discharge between thundercloud and the earth protrusion will take place.Direct lightning strike promptly takes place, and follows thus and a series of destructions such as electrical effect, thermal effect or mechanical force that produce.
Container Yard did not have special direct thunder safeguard before oil changed electricity; The lightning rod that some protection beacons are only arranged on the High-Pole Lamp tower;, tyre crane can prevent the infringement of direct thunder when going in the protection range at these beacons, the just protection of anti-direct thunder of tyre crane when other regional operations, but because tyre crane uses is F-d system; Most of conductively-closed protection of whole electric-control system, the situation that damaged by thunderbolt is rare.
Oil changes after the electricity; Though the tip position at overhead trolley has set up the lightning-arrest rope that prevents that direct thunder from invading; But oil changes the mains supply that trolley that electric tyre crane uses the high-altitude to set up provides, and the rectification system has still been increased before changing electricity than oil not by danger that thunder and lightning invades.Oil in 2009 changes electric system and be struck by lightning by secondary, and the vestige that suffers direct thunder infringement is all arranged.And the method for original direct thunder protection is in the both sides of a circuit, and the top of copper trolley respectively is equipped with a lightning conducter, and the height of its setting does not receive the influence of direct lightning strike by the rolling ball method design of national shocking preventing technology standard law with protection copper trolley.Advantage: invest lowly, construction is simple.Lightning-arrest cable wire adds some suspension stretch-draw annexes by the multiply steel strand wire of two 9MM and forms, designs, form of construction work all carries out according to the electric industry standard, constructs synchronously with trolley, and is simple and convenient.Shortcoming: because lightning-arrest cable wire is to design according to the electric industry standard; And the circuit of electric industry overhead wire is longer; It is longer with the distance between objects that needs protection to receive when being struck by lightning lightning strike spot; Lightning wave energy attenuation when transmission is big, and oil changes the circuit of electricity and the distance of load is similar to zero distance, and therefore the reliability of protection can only reach 80% protection probability.
(2) protection of indirect stroke
Indirect stroke is that the induction owing to thunder and lightning makes system overvoltage occur, can be divided into two types again according to induction situation difference.
A. electrostatic induction overvoltage
When thundercloud during near ground or lead; To on ground or lead, induce a large amount of charges of different polarity, when thundercloud existed, these charges of different polarity received the constraint of thundercloud electric field; Form static electric charge; After thundercloud discharged over the ground, its electric field disappeared, and the charges of different polarity that fettered originally on the lead are because of losing electric field constraint becoming free electron.Free electron, forms and very highly (can reach 500-600kv) voltage, thereby make system suffer overvoltage to two side shiftings along lead.
B. electromagnetic induction overvoltage
When lightning wave was guided into the earth by lightning-arrest rope or lightning rod, with producing huge lightning current, this lightning current was vertiginous high-frequency current, and the lightning current that changes produces powerful variation magnetic field around it.This magnetic field produces very high induced voltage with (like electric equipment, transmission line etc.) on the nigh metallic conductor.
Tyre crane is because the probability that is struck by lightning is very low, and former design does not have the indirect stroke safeguard measure, and oil does not increase the indirect stroke safeguard measure after changing electricity yet, and this system that makes receives possibly also having strengthened of indirect stroke invasion.By system's overvoltage that indirect stroke causes, the harm that oil is changed electric system is very big, especially can damage the electronic devices and components of system.
At present, the safeguard procedures of indirect stroke:
A., power supply class SPD is installed, and communication network class SPD, SPD is the superpotential effective means of conduction surge that caused by lightning strike and other interference in order to the protection electronic electric equipment.
B. equipotential connects, and points out in the IEC standard that it is the important component part of indirect stroke protection that equipotential connects, and its purpose is to reduce the potential difference that lightning current causes.
Do not have the ready-made lightning protection standard can reference because oil changes electric tyre crane, so the indirect stroke protection can only be with reference to the lightning protection standard of building.
Summary of the invention
The present invention will provide a kind of Container Yard installations and facilities lightning-protection system, is used to solve tyre crane oil and changes the direct thunder protection of electricity back Container Yard equipment and the technical problem of indirect stroke protection.
Technical scheme of the present invention is: a kind of Container Yard installations and facilities lightning-protection system; Comprise direct thunder protective device and indirect stroke protector; Direct thunder protective device: on the iron tower top of the overhead power supply system of sliding contact line of tyre crane the pre-arcing lightning rod is installed and is protected slip to exempt from the lightning conducter of direct thunder once more, iron tower and lightning conducter are connected to form pin, the anti-direct thunder assembly of line through the iron tower body; Said indirect stroke protector: slip supports iron tower the one-level surge absorber is installed, and the electric power incoming line case is installed the one-level surge absorber, in electric room the secondary surge absorber is installed.
Difference in height between pre-arcing lightning rod of installing on the overhead power supply system of sliding contact line iron tower of tyre crane top and the overhead trolley that needs protection is 11 meters, and protection radius is greater than 109 meters.
Lightning conducter is leaded up to the vertical ladder ground connection of electric power system iron tower, and another road is through discharge band iron ground connection.The pre-arcing lightning rod is that France produces PDA π X-60 pre-arcing lightning rod.
The invention has the beneficial effects as follows:
The present invention installs France and produces PDA π X-60 pre-arcing lightning rod on the overhead power supply system of sliding contact line iron tower of tyre crane top.Be connected with the lightning conducter on the iron tower, form pin, line lightning protection assembly.In case thundercloud is arranged in that harbor district is overhead when forming lightning strike area, can form electric discharge phenomena on the top of lightning rod rapidly, with the lightning current the earth of releasing, thereby the assurance harbor district sky is safe and reliable.
The effective depth that oil changes between PDA π X-60 pre-arcing lightning rod that electric system installs and the overhead trolley that needs protection has 11 meters, and protection radius adheres to specification greater than 109 meters fully.
The reliable band iron ground connection discharge that connects of lightning conducter two-way, the one tunnel utilizes existing vertical ladder, and newly-increased in addition one tunnel discharge band iron has reduced discharge resistance.Handle the ground connection of former lightning-arrest rope, reach the protective value that reliable ground has improved original lightning-arrest rope.
The electric power incoming line case is installed the one-level surge absorber; In electric room the secondary surge absorber is installed; When system receives when being struck by lightning, the one-level surge absorber can be controlled at the residual voltage of circuit within the 2.5KV, the secondary surge absorber can be controlled at the residual voltage of circuit within the 1.6KV.
Description of drawings
Fig. 1 is a mounting structure sketch map of the present invention;
Fig. 2 is the sketch map that lightning conducter passes through the reliable band iron ground connection discharge that connects of two-way.
Embodiment
Like Fig. 1; Shown in 2; A kind of Container Yard installations and facilities lightning-protection system; Comprise direct thunder protective device and indirect stroke protector, directly the thunder protective device: on iron tower 1 top of the overhead power supply system of sliding contact line of tyre crane pre-arcing lightning rod 2 is installed and is protected slip to exempt from the lightning conducter 3 of direct thunder once more, iron tower 1 is connected to form pin, the anti-direct thunder assembly of line with lightning conducter 3 through the iron tower body; Said indirect stroke protector: slip supports iron tower 9 the one-level surge absorber is installed, and electric power incoming line case 5 is installed the one-level surge absorber, in electric room 6 the secondary surge absorber is installed.The pre-arcing lightning rod is that France produces PDA π X-60 pre-arcing lightning rod.
Difference in height between PDA π X-60 pre-arcing lightning rod of installing on the overhead power supply system of sliding contact line iron tower of tyre crane top 2 and the overhead trolley 4 that needs protection is 11 meters, and protection radius is greater than 109 meters.Lightning conducter 3 is leaded up to the vertical ladder 8 of electric power system iron tower, and another road is through discharge band iron 7 ground connection.
The technical parameter of PDA π X-60 pre-arcing lightning rod
| The effective depth of lightning rod | The pre-arcing time | 2 | 3 | 4 | 5 | 10 |
| Level 1 protection radius | 60 μ s | 31 | 47 | 63 | 79 | 80 |
| Level 2 protection radius | 60 μ s | 39 | 58 | 78 | 97 | 99 |
| Level 3 protection radius | 60 μ s | 43 | 64 | 85 | 107 | 109 |
PDA π X-60 pre-arcing lightning rod technical indicator: when needle point was higher than 4 meters of protected objects, its protection radius just can reach 85 meters.The maximum spacing that our oil changes between the electric overhead power supply system of sliding contact line iron tower is 150 meters; Change on the electric overhead power supply system of sliding contact line iron tower at 72 oil and PDA π X-60 pre-arcing lightning rod to be installed according to being higher than 4 meters height of trolley; Just can change the direct thunder protection of electric system to whole oil covers; The effective depth that our oil changes between PDA π X-60 pre-arcing lightning rod that electric system installs and the overhead trolley that needs protection has 11 meters; Protection radius adheres to specification greater than 109 meters fully.See accompanying drawing 1.
Reliable band iron (40*4) the ground connection discharge that connects of two-way, the one tunnel utilizes existing vertical ladder 8, and newly-increased in addition one tunnel discharge band iron 7 has reduced discharge resistance.Handle the ground connection of former lightning-arrest rope, reach the protective value that reliable ground has improved original lightning-arrest rope.See accompanying drawing 2.
The indirect stroke protection that the present invention adopts:
Indirect stroke is that the induction owing to thunder and lightning makes system overvoltage occur, can be divided into two types again according to induction situation difference.
A. electrostatic induction overvoltage
When thundercloud during near ground or lead; To on ground or lead, induce a large amount of charges of different polarity, when thundercloud existed, these charges of different polarity received the constraint of thundercloud electric field; Form static electric charge; After thundercloud discharged over the ground, its electric field disappeared, and the charges of different polarity that fettered originally on the lead are because of losing electric field constraint becoming free electron.Free electron, forms and very highly (can reach 500-600kv) voltage, thereby make system suffer overvoltage to two side shiftings along lead.
B. electromagnetic induction overvoltage
When lightning wave was guided into the earth by lightning-arrest rope or lightning rod, with producing huge lightning current, this lightning current was vertiginous high-frequency current, and the lightning current that changes produces powerful variation magnetic field around it.This magnetic field produces very high induced voltage with (like electric equipment, transmission line etc.) on the nigh metallic conductor.
Tyre crane is because the probability that is struck by lightning is very low, and former design does not have the indirect stroke safeguard measure, and oil does not increase the indirect stroke safeguard measure after changing electricity yet, and this system that makes receives possibly also having strengthened of indirect stroke invasion.By system's overvoltage that indirect stroke causes, the harm that oil is changed electric system is very big, especially can damage the electronic devices and components of system.
The safeguard procedures of indirect stroke:
C., power supply class SPD is installed, and communication network class SPD, SPD is the superpotential effective means of conduction surge that caused by lightning strike and other interference in order to the protection electronic electric equipment.
D. equipotential connects, and points out in the IEC standard that it is the important component part of indirect stroke protection that equipotential connects, and its purpose is to reduce the potential difference that lightning current causes.
Do not have the ready-made lightning protection standard can reference because oil changes electric tyre crane, so the indirect stroke protection be with reference to the lightning protection standard of building.The protected mode of power supply class SPD is installed at mains side.Surge absorber can be divided into one-level surge absorber and secondary surge absorber again; When system receives when being struck by lightning; The one-level surge absorber can be controlled at the residual voltage of circuit within the 2.5KV, the secondary surge absorber can be controlled at the residual voltage of circuit within the 1.6KV; The protection of one-level secondary need be greater than 10 meters distance, and the distance in the electric power incoming line case of our tyre crane to electric room is eligible.Therefore, the measure of taking is at the electric power incoming line case one-level surge absorber to be installed, and in electric room the secondary surge absorber is installed
The technical parameter of SPD
| The voltage protection level | Rated operational voltage | Lightning impulse current | Nominal discharge current | Response time | ||
| The one-level surge protection | 2.5KV | 440V | 80KA | 40KA | 100ns | |
| The secondary surge protection | 1.6KV | 440V | 40KA | 20KA | 25ns |
Claims (4)
1. Container Yard installations and facilities lightning-protection system; Comprise direct thunder protective device and indirect stroke protector; It is characterized in that: said direct thunder protective device: on iron tower (1) top of the overhead power supply system of sliding contact line of tyre crane pre-arcing lightning rod (2) is installed and is protected slip to exempt from the lightning conducter (3) of direct thunder once more, iron tower (1) and lightning conducter (3) are connected to form pin, the anti-direct thunder assembly of line through the iron tower body; Said indirect stroke protector: slip supports iron tower (9) the one-level surge absorber is installed, and electric power incoming line case (5) is installed the one-level surge absorber, in electric room (6) the secondary surge absorber is installed.
2. Container Yard installations and facilities lightning-protection system according to claim 1 is characterized in that: said lightning conducter (3) is leaded up to vertical ladder (8) ground connection of electric power system iron tower, and another road is through discharge band iron (7) ground connection.
3. Container Yard installations and facilities lightning-protection system according to claim 1; It is characterized in that: the difference in height between said pre-arcing lightning rod of installing on the overhead power supply system of sliding contact line iron tower of tyre crane top (2) and the overhead trolley (4) that needs protection is 11 meters, and protection radius is greater than 109 meters.
4. according to each described Container Yard installations and facilities lightning-protection system of claim 1 to 3, it is characterized in that: said pre-arcing lightning rod (2) produces PDA π X-60 pre-arcing lightning rod for France.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101939516A CN102694360A (en) | 2012-06-13 | 2012-06-13 | Lightning-protection system of equipment and facilities of container yard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101939516A CN102694360A (en) | 2012-06-13 | 2012-06-13 | Lightning-protection system of equipment and facilities of container yard |
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| Publication Number | Publication Date |
|---|---|
| CN102694360A true CN102694360A (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101939516A Pending CN102694360A (en) | 2012-06-13 | 2012-06-13 | Lightning-protection system of equipment and facilities of container yard |
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| Country | Link |
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| CN (1) | CN102694360A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103996975A (en) * | 2014-05-30 | 2014-08-20 | 中国民航大学 | Anti-thunder method for two ends of airfield runway |
| CN107337099A (en) * | 2017-08-22 | 2017-11-10 | 武汉大学 | A kind of lightning protection day net laid for power station cable crane |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2282177A1 (en) * | 1974-08-12 | 1976-03-12 | Pouyet Acetp Ets Henri | De-ionising lightning arrester for overhead power line - has one of electrode pair spaced from line connected to live screen |
| CN201729585U (en) * | 2010-03-29 | 2011-02-02 | 上海沪东集装箱码头有限公司 | Comprehensive safety protection system for supplying power, loading and unloading for overhead sliding-touch line for container yard |
| CN202696102U (en) * | 2012-06-13 | 2013-01-23 | 上海国际港务（集团）股份有限公司振东集装箱码头分公司 | Lightning protection system for equipment and facilities in container yards |
-
2012
- 2012-06-13 CN CN2012101939516A patent/CN102694360A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2282177A1 (en) * | 1974-08-12 | 1976-03-12 | Pouyet Acetp Ets Henri | De-ionising lightning arrester for overhead power line - has one of electrode pair spaced from line connected to live screen |
| CN201729585U (en) * | 2010-03-29 | 2011-02-02 | 上海沪东集装箱码头有限公司 | Comprehensive safety protection system for supplying power, loading and unloading for overhead sliding-touch line for container yard |
| CN202696102U (en) * | 2012-06-13 | 2013-01-23 | 上海国际港务（集团）股份有限公司振东集装箱码头分公司 | Lightning protection system for equipment and facilities in container yards |
Non-Patent Citations (1)
| Title |
|---|
| 上海能港电气工程科技有限公司: "防雷产品—"能港"浪涌吸收器", 《HTTP://WWW.SH-EPORT.COM/TECHNOLOGY/DETAIL.ASPX?ID=61&CLASSID=72339069014638592》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103996975A (en) * | 2014-05-30 | 2014-08-20 | 中国民航大学 | Anti-thunder method for two ends of airfield runway |
| CN103996975B (en) * | 2014-05-30 | 2015-12-09 | 中国民航大学 | A kind of airfield runway two ends lightening arresting method |
| CN107337099A (en) * | 2017-08-22 | 2017-11-10 | 武汉大学 | A kind of lightning protection day net laid for power station cable crane |
| CN107337099B (en) * | 2017-08-22 | 2019-01-29 | 武汉大学 | A kind of lightning protection day net laid for power station cable crane |
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Application publication date: 20120926 |