CN103840447A - Lightning protection system and method - Google Patents
Lightning protection system and method Download PDFInfo
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- CN103840447A CN103840447A CN201410067282.7A CN201410067282A CN103840447A CN 103840447 A CN103840447 A CN 103840447A CN 201410067282 A CN201410067282 A CN 201410067282A CN 103840447 A CN103840447 A CN 103840447A
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Abstract
The invention provides a lightning protection system and method. By the lightning protection system and method, equipment can be prevented from lightning stroke, lightning protection construction and arrangement of the equipment are easy, cost is low, construction and maintenance are easy, and management is convenient. The lightning protection system comprises a power isolation transformer and the equipment. The equipment comprises a power input interface and a signal output interface. The power isolation transformer is connected with the power input interface of the equipment and used for inputting voltage to the equipment. A neutral point of the power isolation transformer is suspended. A ground wire of the equipment is suspended. The signal output interface of the equipment transmits signals to other equipment through a cable. According to the technical scheme, not only is the lightning protection cost lowered, but also implement is easy and management is convenient. The lightning protection system is applicable to the technical field of lightning protection.
Description
Technical field
The present invention relates to shocking preventing technology field, relate in particular to a kind of system and method for lightning protection.
Background technology
At present, the broadband access network devices such as passageway exchange board, Ethernet passive optical network equipment, device of optical network unit, suffer the situation of broken by lightning very serious, often occur that a thunderbolt causes a slice broadband access network device to be damaged, and causes large-area customer complaint thus.The number of devices that annual thunderstorm season is reprocessed is very huge.Its main cause is that Lightning Electromagnetic Pulse that near thunderbolt broadband access network device causes induces the lightning overvoltage of damage equipment at its holding wire and power line.
In prior art, conventionally adopt following two kinds of modes:
1) traditional shocking preventing technology, as shown in Figure 1, adopts the lightning protection circuit of the lightning protection device compositions such as piezo-resistance, discharge tube, Transient Suppression Diode, and this lightning protection circuit is released surge current into ground by earth mat.
2) mode of employing isolating transformer.This mode is applied in large scale system, as the railway system conventionally.In this large scale system, require lighting protection isolated transformer to possess qualified grounding requirement.
In traditional shocking preventing technology, the earth mat surge current of releasing need to be set; In the large scale systems such as the railway system, require isolating transformer to possess qualified grounding requirement, two kinds of modes of the prior art all need to arrange earth mat, and input cost is higher.And broadband access network device is arranged in user's building conventionally, broadband access network device ground connection be existed to the unfavorable factors such as constructional difficulties, construction management complexity and later maintenance complexity, therefore cannot large-scale application.
Summary of the invention
The embodiment of the present invention provides a kind of system and method for lightning protection, and the equipment that not only can prevent is struck by lightning, and makes the lightning protection Construction Arrangement of equipment simple, with low cost, constructs and safeguard simply, convenient management.
For achieving the above object, the embodiment of the present invention adopts following technical scheme:
First aspect, the invention provides a kind of lightning-protection system, and this system comprises: power isolation transformer and equipment;
Described equipment comprises power input interface and signal output interface;
Described power isolation transformer is connected with the power input interface of described equipment, and for to described equipment input voltage, the neutral point of described power isolation transformer suspends, and the ground wire of described equipment suspends;
The signal output interface of described equipment transfers to miscellaneous equipment by cable by signal.
Second aspect, the invention provides a kind of lightening arresting method, and the method comprises:
Described power isolation transformer is connected with the power input interface of described equipment, and for to described equipment input voltage, the neutral point of described power isolation transformer suspends, and the ground wire of described equipment suspends;
The signal output interface of described equipment transfers to miscellaneous equipment by cable by signal.
The embodiment of the present invention provides a kind of lightning-protection system, and this system comprises: power isolation transformer and equipment.Described equipment comprises power input interface and signal output interface; Described power isolation transformer is connected with the power input interface of described equipment, and for to described equipment input voltage, the neutral point of described power isolation transformer suspends, and the ground wire of described equipment suspends; The signal output interface of described equipment transfers to miscellaneous equipment by cable by signal.This technical scheme not only can prevent that equipment is struck by lightning, and makes the lightning protection Construction Arrangement of equipment simple, with low cost, constructs and safeguard simply, convenient management.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is traditional shocking preventing technology schematic diagram;
The schematic diagram one of a kind of lightning-protection system that Fig. 2 provides for the embodiment of the present invention;
The schematic diagram two of a kind of lightning-protection system that Fig. 3 provides for the embodiment of the present invention;
The schematic diagram three of a kind of lightning-protection system that Fig. 4 provides for the embodiment of the present invention;
Fig. 5 is the schematic diagram of the lightning-protection system in EPON equipment;
The schematic flow sheet of a kind of lightening arresting method that Fig. 6 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of system of lightning protection, and as shown in Figure 2, this system comprises: power isolation transformer 21 and equipment 22.This system adopts the mode of " isolating+floating ground ", and the equipment that can prevent is struck by lightning, and therefore without earth mat is set, makes the lightning protection Construction Arrangement of equipment simple, with low cost, constructs and safeguards simply, convenient management.
Described equipment 22 comprises power input interface 221 and signal output interface 222;
Described power isolation transformer 21 is connected with the power input interface 221 of described equipment, and for to described equipment 22 input voltages, the neutral point of described power isolation transformer 21 suspends, and the ground wire of described equipment suspends;
The signal output interface of described equipment 22 transfers to miscellaneous equipment by cable by signal.
Described equipment 22 is at least one in following equipment: switch, Ethernet passive optical network (English: Ethernet Passive Optical Network, be called for short: EPON) equipment, optical network unit (English: Optical Network Unit, abbreviation: ONU) equipment.
Be below the operation principle of described power isolation transformer 21:
Described power isolation transformer 21 input sides are connected with civil power, and wherein, ground wire PE is connected with the earth; Outlet side is connected with described equipment 22.
Concrete, there are two kinds of voltages at the input side of described power isolation transformer 21: the voltage between L line and N line; Voltage between L line and N line and ground.
Wherein, the voltage between L line and N line is differential mode voltage.Interim when there being lightning overvoltage, the iron core of described power isolation transformer 21 inside reaches capacity, and magnetic flux no longer changes, and makes the lightning overvoltage of described power isolation transformer 21 outlet sides very little.
Voltage between L line and N line and ground is common-mode voltage.Owing to having filled insulating material between the iron core of described power isolation transformer 21 and shell, for example: rubber, resin, so can not produce potential difference between iron core and shell, make lightning overvoltage be isolated in the input side of described power isolation transformer 21, cannot arrive outlet side.
No matter differential mode voltage or common-mode voltage, described power isolation transformer 21 can prevent that lightning overvoltage from entering described equipment 22, thereby protects described equipment 22 not damaged.
And for this except having power input interface, also there is the equipment of signal output interface, lightning overvoltage may be invaded described equipment 22 by power input interface or signal output interface.And because power input interface front end arranges isolating transformer 21, the lightning overvoltage of power input can be isolated in outside system.Separately invade the lightning overvoltage of equipment from signal output interface, because the ground wire of described equipment 22 suspends, entirety is floating ground state.Although the current potential of described equipment 22 entirety has lifting with respect to zero potential, can not produce the potential difference between power input interface, electric wire and signaling interface.In theory, the lightning overvoltage that described equipment 22 now can bear is the insulate minimum value of shock-resistant ability of isolating transformer, rack.
Further; and for the potential difference between unlike signal output interface; in the time of thunderbolt, on each signal output interface, the polarity of induced voltage is identical; potential difference between unlike signal output interface is smaller like this; and described equipment 22 output interfaces itself possess overvoltage protecting device, therefore device damage probability is very low.
This system, owing to adopting floating ground mode, therefore without earth mat is set, still can ensure the electrical safety of described equipment by the special connected mode of power isolation transformer 21.This special connected mode is that now the equipment electric power system of described power isolation transformer 21 outlet sides has become IT supply power mode by described power isolation transformer 21 outlet side isolated neutrals.
In the time that signal output interface has lightning overvoltage or single phase ground fault fault, described equipment 22 has just become with reference to zero potential, can't bring the dangerous voltage that causes personal safety simultaneously, and therefore accident of human electric shock can not occur.
Further, in order to strengthen the dielectric strength of described equipment, the lightning-protection system that the embodiment of the present invention provides, as shown in Figure 3, can also comprise: insulation protection module 23.
Described insulation protection module 23, for placing described equipment 22, to make described equipment 22 in state of insulation;
Concrete, described insulation protection module 23 refers to described equipment 22 is adopted insulation cabinet or other insulation measures and ensures certain dielectric strength around.
Now, the lightning overvoltage that described equipment 22 can bear is the minimum value in described power isolation transformer 21 and the withstand voltage coefficient of described insulation protection module 23.
The embodiment of the present invention provides a kind of lightning-protection system.This system comprises: power isolation transformer and equipment.Described equipment comprises power input interface and signal output interface; Described power isolation transformer is connected with the power input interface of described equipment, and for to described equipment input voltage, the neutral point of described power isolation transformer suspends, and the ground wire of described equipment suspends; The signal output interface of described equipment transfers to miscellaneous equipment by cable by signal.This technical scheme not only can prevent that equipment is struck by lightning, and makes the lightning protection Construction Arrangement of equipment simple, with low cost, constructs and safeguard simply, convenient management.Further, this technical scheme has been added insulation protection module, has strengthened the dielectric strength between described equipment and the external world, and lightning protection effect is better.
Optionally, in the time that described equipment has signal output interface, for fear of signal output interface, lightning overvoltage is introduced to described equipment, the embodiment of the present invention also provides a kind of lightning-protection system, as shown in Figure 4:
This system comprises: power isolation transformer, equipment, insulation protection module and signal isolating transformer 24.
The input side of described signal isolating transformer 24 is electrically connected with described miscellaneous equipment by cable;
The outlet side of described signal isolating transformer 24 is electrically connected with the signal output interface of described equipment 22 by cable.
Concrete, described signal output interface can be network interface.
This system is mainly used at least one in following area: area that intensity of lightning is high, the area of thunder and lightning often occurs;
Described cable, for being transferred to other equipment by the output signal of the signal output interface of described equipment 22.Because the distance between described equipment 22 and other equipment is generally far away, so may produce lightning overvoltage on the cable between described equipment 22 and other equipment.Because described signal isolating transformer 24 is without L line and N line, now input side only has common-mode voltage, i.e. voltage between input and ground, and its operation principle is consistent with the operation principle of described power isolation transformer 21, does not repeat herein.
Now; cause described equipment 22 to damage if puncture described power isolation transformer 21, described signal isolating transformer 24 or described insulation protection module 23; need at least destroy two places and could form loop, thereby make the surge current described equipment 22 of flowing through damage described equipment 22.Therefore the lightning overvoltage that now described equipment 22 can bear is the minimum value of any both sums in described power isolation transformer 21, described insulation protection module 23, described signal isolating transformer 24 threes.
The embodiment of the present invention provides a kind of lightning-protection system.This system comprises: power isolation transformer and equipment.Described equipment comprises power input interface and signal output interface; Described power isolation transformer is connected with the power input interface of described equipment, and for to described equipment input voltage, the neutral point of described power isolation transformer suspends, and the ground wire of described equipment suspends; The signal output interface of described equipment transfers to miscellaneous equipment by cable by signal.This technical scheme not only can prevent that equipment is struck by lightning, and makes the lightning protection Construction Arrangement of equipment simple, with low cost, constructs and safeguard simply, convenient management.Further, this technical scheme can be born higher lightning overvoltage, better protects equipment not damaged.
Taking the lightning-protection system in EPON equipment as scene, describe this technical scheme in detail below, as shown in Figure 5:
This system comprises: electric main interface 51, power isolation transformer 52, equipment 53, insulation cabinet 54, signal isolating transformer 55, network interface 56, signal input interface 57, signal output interface 58.
Wherein, described equipment comprises insert row 531, the network switch 532, optical transmitter and receiver 533;
Concrete, described power isolation transformer 52 input sides are connected with described electric main interface 51, and outlet side is connected with described insert row 531;
The input side of the described network switch 532 is connected with ground row, and outlet side is connected with described signal output interface 58, arranges describedly and is placed in described insulation cabinet 54;
The input side of described optical transmitter and receiver 533 is connected with described signal input interface 57, and outlet side is connected with ground row;
Wherein, described signal input interface 57 can be optical cable, is input to described equipment 53 for light signal;
Described signal output interface 58 is connected with described network interface 56;
The outlet side of described signal isolating transformer 55 is connected with described network interface 56, and input side is connected with other equipment.
Come temporarily when lightning overvoltage, because electric main interface 51 and network interface 56 are all provided with isolating transformer, the lightning overvoltage of civil power input interface 51 and signal output interface 58 can be isolated in outside system, protection equipment 53 is not damaged.For the potential difference between unlike signal output interface 58; in the time of thunderbolt, on each signal output interface 58, the polarity of induced voltage is identical; potential difference between unlike signal output interface 58 is smaller like this; and signal output interface 58 itself possesses overvoltage protecting device, therefore equipment 53 probability of damage are very low.
The embodiment of the present invention provides a kind of lightning-protection system.This system comprises: power isolation transformer and equipment.Described power isolation transformer input side is connected with electric main interface, and outlet side is connected with insert row; Described equipment comprises power input interface, the network switch, signal input interface and signal output interface; The power input interface of described equipment is connected with insert row, and signal input interface is connected with optical transmitter and receiver, and signal output interface transfers to miscellaneous equipment by cable by signal.This technical scheme not only can prevent that equipment is struck by lightning, and makes the lightning protection Construction Arrangement of equipment simple, with low cost, constructs and safeguard simply, convenient management.
The embodiment of the present invention provides a kind of lightening arresting method, and as shown in Figure 6, the method comprises:
601, described power isolation transformer is connected with the power input interface of described equipment, and for to described equipment input voltage, the neutral point of described power isolation transformer suspends, and the ground wire of described equipment suspends;
602, the signal output interface of described equipment transfers to miscellaneous equipment by cable by signal.
The method adopts the mode on " isolation+floating ground ", by the mode on described power isolation transformer and floating ground, lightning overvoltage is isolated in outside described equipment.
In order to strengthen the dielectric strength of described equipment, the method also comprises:
Described equipment is placed in insulation protection module, to make described equipment in state of insulation;
In the time that described equipment has signal output interface, for fear of signal output interface, lightning overvoltage is introduced to equipment, the method also comprises:
The signal output interface of described equipment is electrically connected with the outlet side of signal isolating transformer by cable;
The input side of described signal isolating transformer is electrically connected with miscellaneous equipment.
The detailed description of each method step of the embodiment of the present invention, can describe accordingly with reference to above-mentioned lightning-protection system, and the embodiment of the present invention does not repeat them here.
The embodiment of the present invention provides a kind of lightening arresting method, the method comprises: described power isolation transformer is connected with the power input interface of described equipment, be used for to described equipment input voltage, the neutral point of described power isolation transformer suspends, and the ground wire of described equipment suspends; The signal output interface of described equipment transfers to miscellaneous equipment by cable by signal.This technical scheme not only can prevent that equipment is struck by lightning, and makes the lightning protection Construction Arrangement of equipment simple, with low cost, constructs and safeguard simply, convenient management.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can complete by the relevant hardware of program command, aforesaid program can be stored in a computer read/write memory medium, this program, in the time carrying out, is carried out the step that comprises said method embodiment; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.This technical scheme has not only reduced lightning protection cost, implements simply, and convenient management, and can bear higher lightning overvoltage, better protect equipment not damaged.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, any be familiar with those skilled in the art the present invention disclose technical scope in; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.
Claims (7)
1. a system for lightning protection, is characterized in that, this system comprises: power isolation transformer and equipment;
Described equipment comprises power input interface and signal output interface;
Described power isolation transformer is connected with the power input interface of described equipment, and for to described equipment input voltage, the neutral point of described power isolation transformer suspends, and the ground wire of described equipment suspends;
The signal output interface of described equipment transfers to miscellaneous equipment by cable by signal.
2. system according to claim 1, is characterized in that, this system also comprises: insulation protection module;
Described insulation protection module, for placing described equipment, to make described equipment in state of insulation.
3. system according to claim 1 and 2, is characterized in that, this system also comprises: signal isolating transformer;
The input side of described signal isolating transformer is electrically connected with described miscellaneous equipment by cable;
The outlet side of described signal isolating transformer is electrically connected with the signal output interface of described equipment by cable.
4. according to the system described in claim 1-3 any one, it is characterized in that, described equipment is at least one in following equipment:
The network switch, Ethernet passive optical network equipment, device of optical network unit.
5. a method for lightning protection, is characterized in that, the method comprises:
Described power isolation transformer is connected with the power input interface of described equipment, and for to described equipment input voltage, the neutral point of described power isolation transformer suspends, and the ground wire of described equipment suspends;
The signal output interface of described equipment transfers to miscellaneous equipment by cable by signal.
6. method according to claim 5, is characterized in that, the method also comprises:
Described equipment is placed in insulation protection module, to make described equipment in state of insulation.
7. according to the method described in claim 5 or 6, it is characterized in that, the method also comprises:
The signal output interface of described equipment is electrically connected with the outlet side of signal isolating transformer by cable;
The input side of described signal isolating transformer is electrically connected with miscellaneous equipment by cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410067282.7A CN103840447A (en) | 2014-02-26 | 2014-02-26 | Lightning protection system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410067282.7A CN103840447A (en) | 2014-02-26 | 2014-02-26 | Lightning protection system and method |
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| CN103840447A true CN103840447A (en) | 2014-06-04 |
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| CN201410067282.7A Pending CN103840447A (en) | 2014-02-26 | 2014-02-26 | Lightning protection system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162102A (en) * | 2014-06-09 | 2015-12-16 | 山东纵深科技发展有限公司 | Lightning protection grounding-free isolation transformer and application of lightning protection grounding-free isolation transformer to lightning protection for communication broadband box and electric energy gatherer |
| CN114221313A (en) * | 2021-12-07 | 2022-03-22 | 深圳市共进电子股份有限公司 | Protection system and floating equipment |
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| CN101719665A (en) * | 2009-12-24 | 2010-06-02 | 迈普通信技术股份有限公司 | Ethernet port lightning protection device and lightning protection circuit |
| CN101944738A (en) * | 2009-07-10 | 2011-01-12 | 杭州碧蕾科技有限公司 | Lightning protection method by grounding nearest point of signal feeder port |
| CN102435854A (en) * | 2011-09-21 | 2012-05-02 | 安徽省电力公司巢湖供电公司 | Improved method for measuring impulse grounding resistance of electric power system |
| CN102916816A (en) * | 2011-08-02 | 2013-02-06 | 深圳市卓翼科技股份有限公司 | Lightning-proof router of digital subscriber line |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101087068A (en) * | 2006-12-05 | 2007-12-12 | 福建省天通电讯科技有限公司 | A method for eliminating power voltage surge caused by thunder |
| CN101944738A (en) * | 2009-07-10 | 2011-01-12 | 杭州碧蕾科技有限公司 | Lightning protection method by grounding nearest point of signal feeder port |
| CN101719665A (en) * | 2009-12-24 | 2010-06-02 | 迈普通信技术股份有限公司 | Ethernet port lightning protection device and lightning protection circuit |
| CN102916816A (en) * | 2011-08-02 | 2013-02-06 | 深圳市卓翼科技股份有限公司 | Lightning-proof router of digital subscriber line |
| CN102435854A (en) * | 2011-09-21 | 2012-05-02 | 安徽省电力公司巢湖供电公司 | Improved method for measuring impulse grounding resistance of electric power system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162102A (en) * | 2014-06-09 | 2015-12-16 | 山东纵深科技发展有限公司 | Lightning protection grounding-free isolation transformer and application of lightning protection grounding-free isolation transformer to lightning protection for communication broadband box and electric energy gatherer |
| CN114221313A (en) * | 2021-12-07 | 2022-03-22 | 深圳市共进电子股份有限公司 | Protection system and floating equipment |
| CN114221313B (en) * | 2021-12-07 | 2023-09-15 | 深圳市共进电子股份有限公司 | Protection system and floating equipment |
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