CN102904213B - A kind of lightning protection structure of transformator counterattack shunting - Google Patents
A kind of lightning protection structure of transformator counterattack shunting Download PDFInfo
- Publication number
- CN102904213B CN102904213B CN201210410662.7A CN201210410662A CN102904213B CN 102904213 B CN102904213 B CN 102904213B CN 201210410662 A CN201210410662 A CN 201210410662A CN 102904213 B CN102904213 B CN 102904213B
- Authority
- CN
- China
- Prior art keywords
- transformator
- lightning protection
- lightning
- control unit
- impedance control
- 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
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses the lightning protection structure of a kind of transformator counterattack shunting; include the armature winding high-voltage arrester of transformator, connection transformer input; the neutral conductor of described transformator and earthing of casing net; described transformator and outfan thereof are connected to transformator lightning protection box, and described transformator lightning protection box has farther included lightning current frequency impedance control unit and TSPD lightning protection module；One end connection transformer of described lightning current frequency impedance control unit, the other end connects earth mat；The outfan of one end connection transformer of described TSPD lightning protection module, other end ground connection.The lightning protection structure of depressor counterattack shunting, can protect transformator not burnt by thunderbolt effectively, is widely used in the separation thunder-prevention protection device of all kinds of 10KV/400V transformator.
Description
Technical field
The present invention relates to a kind of lightning protection device, particularly relate to the lightning protection structure of transformator counterattack shunting.
Background technology
Severe along with climate change, there is increasingly frequent and severe in lightning hazards accident, people's lives and properties are caused grave danger.In electrical power transmission system, owing to cable adopts built on stilts transmission, the as easy as rolling off a log lightning ingress that suffers, damage power equipment, especially that the damage of high-low pressure transformator is serious；According to IEC thunder-strike prevention standard, it is desirable to the primary side being typically in transformator installs (zinc oxide) high-voltage arrester, adopts line protected mode over the ground；Star (Y) and triangle (△) sending and receiving are adopted according to power system requirements 10KV/400V transformer secondary output, it is divided into the standards such as TT, IT, TN, wherein transformer secondary output winding adopts the transformator neutral earthing of Y connection and the shared earth mat of high-tension transformer.But in face of thunderstorm, transformator still cannot withstand a single blow, and Lightning Fault occurs again and again.
Owing to setting up a complete electric power system and lightning protection system, different industries is needed to complete, and power industry serves a lot of industry, and each industry has the standards and norms of oneself, thus occur in that between industry with industry, occur incompatible between system and system and conflict protection dead angle, protection leak even occur.Such as power industry and the communications industry, the communications industry needs to build a mobile base station on the highest point mountain in suburb, in order to reduce input cost, Utilities Electric Co. is usually and 10KV/400V transformator is arranged on the foot of the hill, and do a primary lightning protection (valve-type 10KV lightning protection device installed over the ground by line, and the power circuit of 10KV end is tapped, shifts protection)；Communication common carrier then obtains power supply by transformator at the foot of the hill, and logical for power supply built on stilts mode is guided in the machine room of mountain top, and takes lightning protection measures in power of computer room porch according to corresponding requiring.
This installation connected mode have ignored the lightning protection of transformator above, there is following hidden danger:
Although the armature winding of 1 transformator is mounted with high pressure lightning protection device, but due to the impact by earth resistance, therefore can't resolve the damage that Lightning disturbance transformator causes.
2, owing to the shell of the 10KV/400V transformator neutral conductor and protection ground wire needs ground connection; the danger of high pressure counterattack can be produced; when 10KV high-pressure side have thunder and lightning flow through high pressure lightning protection device discharge over the ground time; then it is again introduced into transformer secondary output winding and conduction to the shell of transformator through the neutral conductor, causes the damage of transformator.
3, when thunder and lightning introduces from transformer secondary output, lightning current can intrude into the winding of transformator through neutral conductor earial drainage over the ground, electric discharge, so causes thunder and lightning to flow through secondary windings and forms loop over the ground, raises transformer-secondary voltage, and counterattack, to high-pressure side, causes damage.
Summary of the invention
The technical problem to be solved in the present invention is to overcome techniques as described above defect, it is provided that the lightning protection structure of a kind of transformator counterattack shunting.
In order to solve techniques as described above problem, the present invention takes techniques below scheme:
A kind of lightning protection structure of transformator counterattack shunting; include the armature winding high-voltage arrester of transformator, connection transformer input; the neutral conductor of described transformator and earthing of casing net; described transformator and outfan thereof are connected to transformator lightning protection box, and described transformator lightning protection box has farther included lightning current frequency impedance control unit and TSPD lightning protection module；One end connection transformer of described lightning current frequency impedance control unit, the other end connects earth mat；The outfan of one end connection transformer of described TSPD lightning protection module, other end ground connection.
Described lightning current frequency impedance control unit has farther included the first lightning current frequency impedance control unit and the second lightning current frequency impedance control unit；The shell of one end connection transformer of the second described lightning current frequency impedance control unit, the other end connects earth mat；The neutral conductor of one end connection transformer of the first described lightning current frequency impedance control unit, the other end connects earth mat.
Lightning current frequency impedance control unit (hereinafter referred to as ALFB) is a kind of special perceptual device, can with the rising of thunder and lightning frequency characteristic that impedance changes.It is connected on the neutral conductor of transformator and the shell of protection ground wire respectively; when there being Lightning disturbance to earth terminal, ALFB moment is that high impedance status forms tandem impedance with Transformer Winding; owing to the impedance in this loop is significantly high, lightning current is forced to release over the ground according to current characteristics (electric current drop resistance loop).Make it cannot raise transformer secondary output winding voltage and hull return circuit carries out conducting, discharging.
Described TSPD lightning protection module is made up of at least 3 TSPD lightning protection unit.
Described TSPD lightning protection unit farther includes the piezoresistor MOV of the first Thermal Cutoffs FU and the first Thermal Cutoffs FU series connection and is arranged at the second Thermal Cutoffs FU ' for heat monitoring of piezoresistor MOV side.
The discharge capacity of the first described Thermal Cutoffs FU is 40KA, and discharge capacity and the first Thermal Cutoffs FU of described piezoresistor MOV are identical.
The temperature coefficient of the second described Thermal Cutoffs FU ' temperature coefficient less than the first Thermal Cutoffs FU.
When transformator outfan (i.e. low-voltage line terminal) has Lightning disturbance, ALFB and TSPD lightning protection module on the neutral conductor responds simultaneously, ALFB forms tandem high impedance with transformer secondary output winding, cut off the propagation of lightning current, and the earth resistance of transformer station can be relaxed to 100 ohm (because when ALFB has Lightning disturbance, the impedance presented is far longer than 100 ohm)；And lightning current is carried out tapping, shifts by TSPD lightning protection module instant response conducting (in short-circuit condition) over the ground, the voltage of the range of decrease, voltage stabilized transformer secondary windings, protection transformator and reduce the thunderbolt energy of follow-up load equipment.
The present invention by connect lightning current frequency impedance control unit between transformator with earth mat, it is to avoid thunder-strike current passes through ground anti-channeling to the phenomenon of transformator and occurs, thus protecting transformator；Simultaneously by the cooperation of ALFB and TSPD lightning protection module, it is therefore prevented that the phenomenon that transformator was invaded and burnt out to thunder-strike current by the outfan of transformator occurs.
The lightning protection structure of a kind of transformator provided by the invention counterattack shunting, can protect transformator not burnt by thunderbolt effectively, is widely used in the separation thunder-prevention protection device of all kinds of 10KV/400V transformator.
Accompanying drawing explanation
Fig. 1 is the structure chart of the present invention.
Fig. 2 is the structure chart of TSPD lightning protection unit
In figure, 1. transformator, 2. transformator lightning protection box, 3. armature winding high-voltage arrester, 4. earth mat, 21. lightning current frequency impedance control unit, 211. first lightning current frequency impedance control unit, 212. second lightning current frequency impedance control unit, 22.TSPD lightning protection module, 221.TSPD lightning protection unit.
Detailed description of the invention
Refer to Fig. 1; as shown in the figure; a kind of lightning protection structure of transformator counterattack shunting; include the armature winding high-voltage arrester 3 of transformator 1, connection transformer 1 input; the neutral conductor of transformator 1 and earthing of casing net 4; transformator 1 and outfan thereof are connected to transformator lightning protection box 2, and transformator lightning protection box 2 has farther included lightning current frequency impedance control unit 21 and TSPD lightning protection module 22；One end connection transformer 1 of lightning current frequency impedance control unit 21, the other end connects earth mat 4；TSPD lightning protection module 22 is made up of at least 3 TSPD lightning protection unit 221；The outfan of one end connection transformer 1 of TSPD lightning protection module 22, other end ground connection.Lightning current frequency impedance control unit 21 has farther included the first lightning current frequency impedance control unit 211 and the second lightning current frequency impedance control unit 212；The shell of one end connection transformer 1 of the second lightning current frequency impedance control unit 212, the other end connects earth mat 4；The neutral conductor of one end connection transformer 1 of the first lightning current frequency impedance control unit 211, the other end connects earth mat 4.In figure, lines a, b, c represent the track route of thunder-strike current respectively.
Refer to Fig. 2; as it can be seen, TSPD lightning protection unit 221 farther includes the piezoresistor MOV of the first Thermal Cutoffs FU and the first Thermal Cutoffs FU series connection and is arranged at the second Thermal Cutoffs FU ' for heat monitoring of piezoresistor MOV side.The discharge capacity of the first Thermal Cutoffs FU is 40KA, and discharge capacity and the first Thermal Cutoffs FU of piezoresistor MOV are identical, the temperature coefficient of the second Thermal Cutoffs FU ' temperature coefficient less than the first Thermal Cutoffs FU.
The invention have the characteristics that:
1, isolated high-pressure side thunder and lightning flow through earth potential to the transformator neutral conductor, protection ground wire conduction, counterattack after raise the voltage in transformer secondary output winding, cause counterattack boosting damage.
2, having isolated lightning current to introduce from low-pressure end, the path formed over the ground by the neutral conductor after entering from transformer secondary output winding, the counterattack caused boosting damages.
3, provide transformer secondary output by-pass shunt device, install at transformer secondary output end and there is electronic type cross stream, overvoltage, overheated TSPD lightning protection module, undertaken the thunderbolt of transformer secondary output end tapping, shift, the range of decrease, voltage stabilizing, and meet energy conservation principle.
4, the TSPD lightning protection module in device possesses normally closed switch loop, after series LED, it is achieved that the monitoring to the duty of TSPD lightning protection module, reduces maintenance difficulties and cost.Possess and have fault indication function, attendant's state according to display lamp at the scene, need not dismantle, (machine) case need not be opened, professional test instrument test need not be carried just can be accurately judged to duty and the performance of transformator lightning protection, maintain easily.
Claims (5)
1. the lightning protection structure of a transformator counterattack shunting; include the armature winding high-voltage arrester of transformator, connection transformer input; the neutral conductor of described transformator and earthing of casing net; it is characterized in that: described transformator and outfan thereof are connected to transformator lightning protection box, described transformator lightning protection box has farther included lightning current frequency impedance control unit and TSPD lightning protection module；One end connection transformer of described lightning current frequency impedance control unit, the other end connects earth mat；The outfan of one end connection transformer of described TSPD lightning protection module, other end ground connection；
Described lightning current frequency impedance control unit has farther included the first lightning current frequency impedance control unit and the second lightning current frequency impedance control unit；The shell of one end connection transformer of the second described lightning current frequency impedance control unit, the other end connects earth mat；The neutral conductor of one end connection transformer of the first described lightning current frequency impedance control unit, the other end connects earth mat.
2. lightning protection structure as claimed in claim 1, it is characterised in that: described TSPD lightning protection module is made up of at least 3 TSPD lightning protection unit.
3. lightning protection structure as claimed in claim 2, it is characterised in that: described TSPD lightning protection unit farther includes the piezoresistor MOV of the first Thermal Cutoffs FU and the first Thermal Cutoffs FU series connection and is arranged at the second Thermal Cutoffs FU ' for heat monitoring of piezoresistor MOV side.
4. lightning protection structure as claimed in claim 3, it is characterised in that: the discharge capacity of the first described Thermal Cutoffs FU is 40KA, and discharge capacity and the first Thermal Cutoffs FU of described piezoresistor MOV are identical.
5. the lightning protection structure as described in claim 3 or 4, it is characterised in that: the temperature coefficient of the second described Thermal Cutoffs FU ' temperature coefficient less than the first Thermal Cutoffs FU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210410662.7A CN102904213B (en) | 2012-10-24 | 2012-10-24 | A kind of lightning protection structure of transformator counterattack shunting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210410662.7A CN102904213B (en) | 2012-10-24 | 2012-10-24 | A kind of lightning protection structure of transformator counterattack shunting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102904213A CN102904213A (en) | 2013-01-30 |
| CN102904213B true CN102904213B (en) | 2016-06-29 |
Family
ID=47576329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210410662.7A Expired - Fee Related CN102904213B (en) | 2012-10-24 | 2012-10-24 | A kind of lightning protection structure of transformator counterattack shunting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102904213B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206226003U (en) * | 2016-06-07 | 2017-06-06 | 贵州电网有限责任公司电力科学研究院 | A kind of power circuit lightning protection and the counterattack of ground potential high pressure suppress protection device |
| CN107294198A (en) * | 2017-06-29 | 2017-10-24 | 江苏省邮电规划设计院有限责任公司 | A kind of 4G base station powers system |
| CN114172109A (en) * | 2021-12-13 | 2022-03-11 | 武汉凯飞通信科技有限公司 | A lightning protection box three-phase AC power lightning isolation protection system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0128344A1 (en) * | 1983-05-16 | 1984-12-19 | Transformatoren Union Aktiengesellschaft | Arrangement of surge arresters for a transformer |
| CN2619393Y (en) * | 2003-05-06 | 2004-06-02 | 深圳市麦克海鹏信电子有限公司 | Power lightning protector |
| WO2007117449A2 (en) * | 2006-03-31 | 2007-10-18 | Leveler Llc | Polyphase power conditioning circuits |
| CN201063272Y (en) * | 2007-07-27 | 2008-05-21 | 张庭炎 | Lightning protection device for transformer and power supply line |
| CN201307768Y (en) * | 2008-06-16 | 2009-09-09 | 陕西蓝河电气工程有限公司 | Special lightning protection wave trapper for a power distribution transformer |
| CN202856318U (en) * | 2012-10-24 | 2013-04-03 | 深圳市雷博斯科技有限公司 | Lightning protection structure for counterattack current division of transformer |
-
2012
- 2012-10-24 CN CN201210410662.7A patent/CN102904213B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0128344A1 (en) * | 1983-05-16 | 1984-12-19 | Transformatoren Union Aktiengesellschaft | Arrangement of surge arresters for a transformer |
| CN2619393Y (en) * | 2003-05-06 | 2004-06-02 | 深圳市麦克海鹏信电子有限公司 | Power lightning protector |
| WO2007117449A2 (en) * | 2006-03-31 | 2007-10-18 | Leveler Llc | Polyphase power conditioning circuits |
| CN201063272Y (en) * | 2007-07-27 | 2008-05-21 | 张庭炎 | Lightning protection device for transformer and power supply line |
| CN201307768Y (en) * | 2008-06-16 | 2009-09-09 | 陕西蓝河电气工程有限公司 | Special lightning protection wave trapper for a power distribution transformer |
| CN202856318U (en) * | 2012-10-24 | 2013-04-03 | 深圳市雷博斯科技有限公司 | Lightning protection structure for counterattack current division of transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102904213A (en) | 2013-01-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202513561U (en) | Arc light protection system of high-voltage switch cabinet | |
| CN202856318U (en) | Lightning protection structure for counterattack current division of transformer | |
| CN103683225B (en) | Nuclear power station low-voltage distribution system full supply district earth-fault protection method | |
| EP4046249B1 (en) | High voltage overhead electric transmission line equipped with switchgear unit | |
| CN102904213B (en) | A kind of lightning protection structure of transformator counterattack shunting | |
| CN103779857A (en) | Novel surge protection device | |
| CN102064528A (en) | Transformer neutral point earth protection device | |
| CN102570388A (en) | Controllable device of surge protector | |
| CN201774233U (en) | Novel protection device special for low voltage generator | |
| CN103595029A (en) | Fault self-adaptive ground connecting processing system and method for distribution network power grid | |
| JP2009240029A (en) | Lightning protection device and housing box | |
| CN202888821U (en) | A network signal surge protective device | |
| CA2778712C (en) | Surge arrester and gas-insulated electric apparatus | |
| CN202663106U (en) | Open-circuit prevention protective circuit for end screen grounding | |
| CN104917143A (en) | Lightning circuit breaker based on high-frequency inductive reactance test | |
| CN203339501U (en) | Wiring system used for 220kV transformer substation | |
| KR102613905B1 (en) | Relay | |
| CN204967248U (en) | Prevent protection device of high -pressure generating line short circuit | |
| CN104377664A (en) | Medium-voltage and low-voltage arc light busbar protection device set | |
| CN205304239U (en) | Dry node lightning protection module of outdoor photovoltaic equipment | |
| CN201430425Y (en) | Surge protector used for end equipment | |
| CN202888825U (en) | Novel surge protection device (SPD) | |
| CN201946946U (en) | Novel neutral line disconnection protection module of low-voltage circuit breaker | |
| CN202888822U (en) | A novel control signal lightning protection device | |
| CN201252400Y (en) | Overvoltage decoupling device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Lightning protection structure for counterattack shunting of transformer Effective date of registration: 20190815 Granted publication date: 20160629 Pledgee: Ganzhou Nankang District Chengfa Group Financial Investment Co.,Ltd. Pledgor: SHENZHEN LEBOS TECHNOLOGY Co.,Ltd. Registration number: Y2019440020006 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160629 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |