CN102931592A - Lightning-protection power distribution cabinet - Google Patents

Lightning-protection power distribution cabinet Download PDF

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Publication number
CN102931592A
CN102931592A CN2012105042887A CN201210504288A CN102931592A CN 102931592 A CN102931592 A CN 102931592A CN 2012105042887 A CN2012105042887 A CN 2012105042887A CN 201210504288 A CN201210504288 A CN 201210504288A CN 102931592 A CN102931592 A CN 102931592A
Authority
CN
China
Prior art keywords
lightning protection
power supply
lightning
equipment
circuit
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.)
Pending
Application number
CN2012105042887A
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Chinese (zh)
Inventor
王芳红
张莹
蒋宏男
方旭东
刘文俊
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.)
Fenghua power supply bureau
State Grid Corp of China SGCC
Original Assignee
Fenghua power supply bureau
State Grid Corp of China SGCC
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 Fenghua power supply bureau, State Grid Corp of China SGCC filed Critical Fenghua power supply bureau
Priority to CN2012105042887A priority Critical patent/CN102931592A/en
Publication of CN102931592A publication Critical patent/CN102931592A/en
Pending legal-status Critical Current

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Abstract

The application discloses a lightning-protection power distribution cabinet, comprising a cabinet body and a lightning-protection power supply circuit. The lightning-protection power supply circuit comprises a lightning protection circuit, indication equipment and an output unit, wherein the input end of the lightning protection circuit is connected with a power supply system; the output end of the lightning protection circuit is connected with the output unit, and is used for removing a lightning surge voltage from the power supply system; the lightning protection circuit internally comprises a primary discharge unit, a secondary choke unit and a third clamping unit, which are sequentially connected with one another; the indication equipment is connected with the lightning protection circuit, and is used for displaying various phases of currents and voltages of each path in the lightning protection circuit; and the output end of the output unit is connected with equipment to be protected, and is used for supplying power to the equipment to be protected. The lightning-protection power distribution cabinet utilizes the lightning-protection power supply circuit inside the cabinet body to remove the lightning surge voltage from the power supply system in a three-level manner, thus avoiding the damage on the equipment to be protected, caused by the lightning surge voltage from the power supply system.

Description

The lightning protection power distribution cabinet
Technical field
The application relates to the circuit protection technical field, particularly relates to a kind of lightning protection power distribution cabinet.
Background technology
Along with the progress of science and technology, by the automated system of microcomputer and large scale integrated circuit installation composition, replace conventional measurement and supervisory instrument, conventional control flow, central signal system, telemechanical to shield and conventional relaying protection.Automation and intelligent level have been improved.
But; the problem that thereupon occurs is; integrated circuit for microsystem; working voltage only has the three ten-day period of hot season, signal code only is microampere order; comparing in the past electromagnetic type protective device, to possess shock-resistant capacity little; tolerance to surge is relatively more fragile, and particularly the transient state impact of Lightning Over-voltage can cause microsystem badly damaged, and therefore the anti-lightning strike problem of the comprehensive automations such as microsystem, computer network, intelligent equipment is required to have included in the normal protection at present.
Summary of the invention
In view of this, the embodiment of the present application provides a kind of lightning protection power distribution cabinet, to avoid thunder and lightning equipment to be protected is caused damage.
To achieve these goals, the technical scheme that provides of the embodiment of the present application is as follows:
A kind of lightning protection power distribution cabinet comprises cabinet and is arranged on the interior lightning protection power supply circuits of described cabinet,
Described lightning protection power supply circuits comprise: lightning protection circuit, indicating equipment and output unit, wherein,
The input of described lightning protection circuit is connected with power-supply system, and the output of described lightning protection circuit is connected with output unit, is used for eliminating the lightning surge voltage to being entered by power-supply system;
Comprise the first order vent unit, second level choke unit and the third level clamper unit that are connected successively in the described lightning protection circuit;
Described indicating equipment is connected with lightning protection circuit, is used for each phase current of every road, voltage in the described lightning protection circuit are shown;
The output of described output unit is connected with equipment to be protected, is used for powering to equipment to be protected.
Preferably, in this lightning protection power distribution cabinet that the embodiment of the present application provides, the ground wire of described lightning protection circuit links to each other with the ground wire of equipment to be protected.
Preferably, in this lightning protection power distribution cabinet that the embodiment of the present application provides, release response time of element of the described first order is 25ns.
Preferably, in this lightning protection power distribution cabinet that the embodiment of the present application provides, further comprise: straight-through power supply circuits and commutation circuit;
One end of described straight-through power supply circuits is connected with described power-supply system, and the other end is connected with equipment to be protected;
Described commutation circuit is connected with described lightning protection power supply circuits, straight-through power supply circuits respectively, is used for when lightning protection, and with the conducting of described lightning protection power supply circuits, and with described straight-through power supply circuits disconnection; When few thunderstorm season, lightning protection circuit fault, maintenance or maintenance, with described straight-through power supply circuits conducting, and with described lightning protection power supply circuits disconnection.
By above technical scheme as seen; this lightning protection power distribution cabinet that the embodiment of the present application provides; utilization is arranged on the lightning protection supply access in the cabinet; to carry out three grades of eliminations through first order vent unit, second level choke unit and third level clamper unit by the lightning surge voltage that power-supply system enters, and then can avoid lightning surge voltage by power-supply system equipment to be protected to be caused damage.
In addition; also be provided with straight-through power supply circuits and commutation circuit in this lightning protection power distribution cabinet; when few thunderstorm season (for example winter), lightning protection circuit fault, maintenance or maintenance; commutation circuit can will lead directly to the power supply circuits conducting; and the lightning protection power supply circuits are disconnected, and then do not interrupt the power supply of equipment to be protected when can be implemented in maintenance.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, the accompanying drawing that the following describes only is some embodiment that put down in writing among the application, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The connection diagram of the lightning protection power distribution cabinet that Fig. 1 provides for the embodiment of the present application one;
The structural representation of the lightning protection power distribution cabinet that Fig. 2 provides for the embodiment of the present application one;
The structural representation of the lightning protection power distribution cabinet that Fig. 3 provides for the embodiment of the present application two.
Embodiment
In order to make those skilled in the art person understand better technical scheme among the application, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment only is the application's part embodiment, rather than whole embodiment.Based on the embodiment among the application, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all should belong to the scope of the application's protection.
At present, lightning surge voltage mainly contains following several mode of infection:
1, the intrusion of power-supply system.Thunderbolt is directly hit near power line or the power line, induces overvoltage at power line, imports power-supply system into;
2, the intrusion of signal system.Lightning induced voltage is imported into by holding wire;
3, the induction of external electromagnetic field.Thunder and lightning hits arrester or building, and when lightning current flowed into the earth along downlead, the space produced the electromagnetic field of alternation around, induces overvoltage at power line or holding wire;
4, earthy counterattack.When lightning current flows into the earth, because the existence of earth resistance can produce larger pressure drop, earth potential is raised, reverse breakdown equipment; Or thundercloud goes out opposite charges at geoinduction, if when thundercloud disappears, large electric charge on the ground can be wandering to infinite point, and earth potential is raise, and produces counterattack.
As seen, the superpotential protection of lightning surge generally includes: the protection of the protection of power-supply system, the anti-electromagnetic shielding of signal system, the joint grounding body of grounding system.
But because the power-supply system intrusion is the most common.Therefore, when lightning protection, must be equipped with the lightning protection power distribution cabinet.
Embodiment one:
The connection diagram of the lightning protection power distribution cabinet that Fig. 1 provides for the embodiment of the present application one.The internal structure schematic diagram of the lightning protection power distribution cabinet that Fig. 2 provides for the embodiment of the present application.
Among Fig. 1,100 is power-supply system, and 200 are the lightning protection power distribution cabinet, and 300 is equipment to be protected, and as shown in Figure 2, this lightning protection power distribution cabinet 200 comprises: cabinet and lightning protection power supply circuits 1.
Cabinet is arranged between equipment to be protected and the power-supply system usually, and when thunderbolt occurring, this is at first released the lightning current of power system transient into ground, simultaneously induction overvoltage is limited in the level that equipment can bear, and avoids superpotential impact like this.
As shown in Figure 2, lightning protection power supply circuits 1 comprise: lightning protection circuit 11, indicating circuit 12 and output circuit 13, wherein,
The input of described lightning protection circuit 11 is connected with power-supply system 100, and the output of described lightning protection circuit 11 is connected with output circuit 13, is used for eliminating the lightning surge voltage to being entered by power-supply system.
And with reference to shown in Figure 2, comprise in this lightning protection circuit: first order leadage circuit 111, second level choked flow circuit 112 and third level clamp circuit 113, wherein, first order leadage circuit 111, second level choked flow circuit 112 and third level clamp circuit 113 threes are electrically connected successively, to realize that the thunderbolt voltage surge is carried out three grades of protection.
When thunder and lightning is protected, preset the voltage threshold in the first order leadage circuit 111, when external voltage surpasses this voltage threshold, the element of releasing in the first order leadage circuit 111 can be in 25ns the instantaneous thunder-strike current of releasing over the ground; Simultaneously second level choked flow circuit 112 is used for stoping thunder-strike current to continue to pass through; Last third level clamper unit is used for limiting too high lightning surge voltage to be passed through, and output voltage is clamped in the safety value.
The output of described output circuit 13 is connected with equipment to be protected 300, is used for powering to equipment to be protected 300.In addition, these lightning protection power supply circuits can also normal power supply when carrying out lightning Protection.
In addition, for the handled easily personnel understand the operating state in the lightning protection circuit, can also arrange in this lightning protection circuit: indicating circuit 12,
Indicating circuit 12 is connected with lightning protection circuit 11, is used for each phase current of every road, voltage in the described lightning protection circuit are shown.
In order to increase the lightning protection properties of this lightning protection power distribution cabinet; the ground wire of lightning protection circuit can also be connected with system's ground wire of equipment to be protected; namely so that the ground wire of lightning protection circuit is connected with system's ground wire implementation equipotential of equipment to be protected, the electric power system of all equipments to be protected is on the same foundation current potential.
This lightning protection power distribution cabinet that the embodiment of the present application provides; utilization is arranged on the lightning protection supply access in the cabinet; to carry out three grades of eliminations through first order vent unit, second level choke unit and third level clamper unit by the lightning surge voltage that power-supply system enters, and then can avoid lightning surge voltage by power-supply system equipment to be protected to be caused damage.
Embodiment two:
Owing in above-described embodiment, only be provided with a path in the lightning protection power distribution cabinet, break down when lightning protection circuit like this, perhaps need to lightning protection circuit overhaul, when maintaining, just so that the equipment to be protected outage, this will affect the use of equipment to be protected greatly.
For fear of since lightning protection circuit break down, perhaps need to lightning protection circuit overhaul, maintain and so that equipment to be protected do not cut off the power supply.
As shown in Figure 3, this lightning protection power distribution cabinet 200 that the embodiment of the present application provides also comprises: straight-through power supply circuits 3 and commutation circuit 4, wherein:
One end of described straight-through power supply circuits 3 is connected with described power-supply system 100, and the other end is connected with equipment to be protected 300;
Described commutation circuit 4 is connected with described lightning protection power supply circuits 1, straight-through power supply circuits 3 respectively, is used for when lightning protection, and with described lightning protection power supply circuits 1 conducting, and with described straight-through power supply circuits 3 disconnections; When few thunderstorm season (for example winter), lightning protection circuit fault, maintenance or maintenance, with described straight-through power supply circuits 3 conductings, and with described lightning protection power supply circuits 1 disconnection.
By above scheme, this lightning protection power distribution cabinet does not interrupt the power supply of equipment to be protected when can be implemented in maintenance.
Owing to also be provided with straight-through power supply circuits and commutation circuit in this lightning protection power distribution cabinet; so when lacking thunderstorm season (for example winter), lightning protection circuit fault, maintenance or maintaining; commutation circuit can will lead directly to the power supply circuits conducting; and the lightning protection power supply circuits are disconnected, and then do not interrupt the power supply of equipment to be protected when can be implemented in maintenance.
The above only is the application's preferred implementation, makes those skilled in the art can understand or realize the application.Multiple modification to these embodiment will be apparent to one skilled in the art, and General Principle as defined herein can in the situation of the spirit or scope that do not break away from the application, realize in other embodiments.Therefore, the application will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (4)

1. a lightning protection power distribution cabinet, is characterized in that to equipment to be protected for the lightning surge voltage transmission that prevents from being entered by power-supply system, comprise cabinet and be arranged on the interior lightning protection power supply circuits of described cabinet,
Described lightning protection power supply circuits comprise: lightning protection circuit, indicating equipment and output unit, wherein,
The input of described lightning protection circuit is connected with power-supply system, and the output of described lightning protection circuit is connected with output unit, is used for eliminating the lightning surge voltage to being entered by power-supply system;
Comprise the first order vent unit, second level choke unit and the third level clamper unit that are connected successively in the described lightning protection circuit;
Described indicating equipment is connected with lightning protection circuit, is used for each phase current of every road, voltage in the described lightning protection circuit are shown;
The output of described output unit is connected with equipment to be protected, is used for powering to equipment to be protected.
2. circuit according to claim 1 is characterized in that, the ground wire of described lightning protection circuit links to each other with the ground wire of equipment to be protected.
3. method according to claim 2 is characterized in that, release response time of element of the described first order is 25ns.
4. method according to claim 3 is characterized in that, further comprises: straight-through power supply circuits and commutation circuit;
One end of described straight-through power supply circuits is connected with described power-supply system, and the other end is connected with equipment to be protected;
Described commutation circuit is connected with described lightning protection power supply circuits, straight-through power supply circuits respectively, is used for when lightning protection, and with the conducting of described lightning protection power supply circuits, and with described straight-through power supply circuits disconnection; When few thunderstorm season, lightning protection circuit fault, maintenance or maintenance, with described straight-through power supply circuits conducting, and with described lightning protection power supply circuits disconnection.
CN2012105042887A 2012-11-28 2012-11-28 Lightning-protection power distribution cabinet Pending CN102931592A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105185035A (en) * 2015-09-30 2015-12-23 国家电网公司 Anti-electric-shock distribution box
CN105186314A (en) * 2015-09-30 2015-12-23 国家电网公司 Safe power distribution cabinet
CN105244770A (en) * 2015-09-30 2016-01-13 国家电网公司 Lightning-protection power distribution cabinet

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102023253A (en) * 2010-10-29 2011-04-20 北京清网华科技有限公司 Lightning-proof monitoring warning system
CN202142848U (en) * 2011-07-04 2012-02-08 广州易仕科技有限公司 Cascade filtering type lightening protection cabinet with large-current bypass structure
CN102739027A (en) * 2012-06-26 2012-10-17 深圳英飞拓科技股份有限公司 Protective circuit for DC (direct current) power supply interface of 24V
CN202997329U (en) * 2012-11-28 2013-06-12 奉化市供电局 Lightning-protection power distribution cabinet

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102023253A (en) * 2010-10-29 2011-04-20 北京清网华科技有限公司 Lightning-proof monitoring warning system
CN202142848U (en) * 2011-07-04 2012-02-08 广州易仕科技有限公司 Cascade filtering type lightening protection cabinet with large-current bypass structure
CN102739027A (en) * 2012-06-26 2012-10-17 深圳英飞拓科技股份有限公司 Protective circuit for DC (direct current) power supply interface of 24V
CN202997329U (en) * 2012-11-28 2013-06-12 奉化市供电局 Lightning-protection power distribution cabinet

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105185035A (en) * 2015-09-30 2015-12-23 国家电网公司 Anti-electric-shock distribution box
CN105186314A (en) * 2015-09-30 2015-12-23 国家电网公司 Safe power distribution cabinet
CN105244770A (en) * 2015-09-30 2016-01-13 国家电网公司 Lightning-protection power distribution cabinet

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Application publication date: 20130213