CN107316724B - Alternating current-direct current voltage limiter - Google Patents
Alternating current-direct current voltage limiter Download PDFInfo
- Publication number
- CN107316724B CN107316724B CN201710445541.9A CN201710445541A CN107316724B CN 107316724 B CN107316724 B CN 107316724B CN 201710445541 A CN201710445541 A CN 201710445541A CN 107316724 B CN107316724 B CN 107316724B
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- direct current
- voltage limiter
- alternating current
- ring body
- current voltage
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/16—Resistor networks not otherwise provided for
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of alternating current-direct current voltage limiters, including direct current arrester element, grading ring, direct current arrester element is connected in parallel to form alternating current-direct current voltage limiter ontology with grading ring, alternating current-direct current voltage limiter ontology is connected with reed relay, reed relay penetrates alternating current-direct current voltage limiter ontology lower end and draws earth lead in a series arrangement, reed relay includes normally-open normally-close contact, normally-open normally-close contact is connect by normally-open normally-close contact lead with aviation socket, aviation socket is connected with signal lead-out wire, straight alternating current-direct current voltage limiter ontology lower end is equipped with connecting flange, connecting flange is equipped with bolt, it is connected by felt pad between bolt and connecting flange, earth lead and reed relay are installed on by fastening bolt on the connecting flange of alternating current-direct current voltage limiter ontology.The alternating current-direct current voltage limiter plays the role of atmospheric over-voltage, switching overvoltage to inhibit protection, also does not convert to exchange to advance rashly to play being effectively protected in time to motor-car.
Description
Technical field
The invention belongs to electrified track traffic arrester technical field, especially one kind being mainly used in the double systems of alternating current-direct current
Formula Traction networks DC voltage 4kV is hereinafter, alternating current-direct current voltage limiter on the motor-car of alternating voltage 25kV.
Background technology
Alternating current-direct current voltage limiter is mainly used in alternating current-direct current double-standard Traction networks DC voltage 4kV hereinafter, alternating voltage 25kV
Motor-car on.When motor-car is run under DC grid, internal Suppressing Switching Overvoltage externally limits atmospheric over-voltage.Work as limit
The electric current of peace times grade drives magnetic relay, pole to cut off major loop rapidly and avoid accident when depressor carrying is beyond self-energy
Or expand.When motor-car will enter AC system in straight-flow system operation, conversion emits when entering 25kV systems change-over switch in time,
Magnetic relay, pole is driven to cut off lead back rapidly by the gap discharge electric current of voltage limiter or by the electric current that varistor flows through
Road avoids accident from occurring or expand.
The fast development of China's rail traffic cause, China the Belt and Road advocate instrument under, made in China move towards the world,
Influence the world.Chinese high ferro is by the concern of the world and liking for the people of the world.In order to adapt to domestic and international alternating current-direct current double-standard electricity
The electrical equipment of power Traction networks, electric tractor must be effectively protected, and prevent interior external overvoltage from being harassed to electrical equipment, prevent
It is not converted in time when only combined-voltage is converted, DC equipment, which emits, enters AC system, causes heavy losses.Alternating current-direct current pressure limiting
Device, due to fast response time, over-voltage ability is strong, in alternating current-direct current standard system to vehicle advance rashly and operation of power networks rise
Protective effect well is arrived.
Motor-car under the operation of double-current standard voltage, combined-voltage pressure difference reach six, seven times to more than ten times, domestic direct current
Voltage is 1.5kV, alternating voltage 25kV.External DC voltage is 3.0kV.At present in over-voltage measure, two are
System installs two voltage limiter (gapless Oxide Arrester) limitation internal overvoltages and outside atmosphere overvoltage.If motor-car exists
When that will enter AC system during running at high speed, signal is disturbed or AC-DC conversion disconnecting link fails to be switched to exchange in time
System, the DC equipment on motor-car will be suffered a loss by impact.
Voltage limiter (arrester) used at present can only over-voltage, advancing rashly for double-current vehicle and is effectively arranged shortage protection
It applies, when the fallback that can only stop that breaks down that advances rashly, prodigious trouble can be caused, vehicle is caused to be delayed.
Invention content
For overcome the deficiencies in the prior art, the present invention provides a kind of alternating current-direct current voltage limiter, the alternating current-direct current voltage limiters pair
Atmospheric over-voltage, the switching overvoltage of system appearance play inhibition protection, and to motor-car, conversion exchange in time advances rashly and can play
It is effectively protected effect.In the case of damaged themselves, reed relay provides signal, can disconnect main disconnected excision short circuit event in time
Barrier point falls fault point pantograph.
To achieve the goals above, the technical solution adopted by the present invention is：A kind of alternating current-direct current voltage limiter, including direct current are lightning-arrest
Device element, it is characterised in that：Further include grading ring, direct current arrester element is connected in parallel to form alternating current-direct current voltage limiter with grading ring
Ontology, alternating current-direct current voltage limiter ontology are connected with reed relay, and reed relay penetrates alternating current-direct current voltage limiter sheet in a series arrangement
Earth lead is drawn in body lower end, and reed relay includes normally-open normally-close contact, and normally-open normally-close contact is drawn by normally-open normally-close contact
Line is connect with aviation socket, and aviation socket is connected with signal lead-out wire, and the alternating current-direct current voltage limiter ontology lower end is equipped with connection method
Orchid, connecting flange are equipped with bolt, are connected by felt pad between bolt and connecting flange, the earth lead and magnetic red relay
Device is installed on by fastening bolt on the connecting flange of alternating current-direct current voltage limiter ontology.
Further, the grading ring includes being respectively arranged under direct current arrester element upper end, direct current arrester element
End it is upper press electric ring and it is lower press electric ring, it is lower to press that also uniformly distributed on electric ring there are four striking electric discharge cones.
Further, it is described it is upper to press electric ring include upper ring body, upper ring body is installed on direct current arrester member through upper bracket
Part upper end, upper ring body and upper bracket connect to form inverted U chamber, which is set to direct current arrester member upper, under described
It includes lower ring body to press electric ring, and lower ring body is installed on through lower bracket on connecting flange, lower ring body connected with lower bracket to be formed it is U-shaped
Chamber, the U-shaped cavity cover at direct current arrester element lower portions, and upper ring body and lower ring body are corresponding up and down.Upper ring body and lower ring body, as
Two basin bodies are installed on direct current arrester element top and bottom, and arrester is placed in centre.
Further, the equal showing ellipsoidal structure of the upper ring body and the respective cross section of lower ring body.
Further, the striking electric discharge cone includes cone head, connecting pole, and cone head is located at lower ring body towards upper ring
The end face of body, connecting pole one end are connect with cone head, and the connecting pole other end is fixed across lower ring body through nut.
Further, the upper ring body and lower ring body are made of metal material.
Further, the reed relay includes the power frequency Open magnetic ring of no coiling, normally-open normally-close tongue tube, often
It opens normally closed tongue tube and is installed on the magnetic red for being fitted into together after the opening of power frequency Open magnetic ring and forming encapsulating structure in magnetic ring shell
Relay.
Further, the power frequency Open magnetic ring is made of silicon steel material.
Using the above scheme, when motor-car is run under DC grid, alternating current-direct current voltage limiter of the invention has internally limit
The effect of switching overvoltage, external limitation atmospheric over-voltage processed.When the carrying of alternating current-direct current voltage limiter is beyond self-energy, pacify times grade
Electric current drive magnetic relay, pole cut off rapidly major loop avoid accident occur or expand.When motor-car is run in straight-flow system
AC system will be entered, conversion emits when entering 25kV systems change-over switch in time, passes through the gap discharge of alternating current-direct current voltage limiter
Electric current drives magnetic relay, pole to cut off major loop rapidly and accident is avoided to occur or expand by the electric current that varistor flows through
Greatly.The present invention by direct current arrester element, press electric ring, reed relay combines and forms comprehensive voltage-limiting protector, this hair
It is bright to have many advantages, such as simple and compact for structure, small, reliable in action；It is not timely AC system conversion disconnecting link will to be entered in motor-car
Conversion emits when entering AC system, by metal material as the electric ring that presses made using 304 stainless steels is discharged, due to arc resistance
Effect, while varistor also has portion of electrical current mistake, and two strands of electric currents converge into ground wire, shadow of the reed relay by electric current
It rings generation magnetic field and sends out signal cut breaker, play a protective role.
Operation principle of the alternating current-direct current voltage limiter in straight-flow system is as follows：(1) when motor-car pulling motion at a dc voltage,
The switching overvoltage and atmospheric over-voltage of initiation absorb pressure limiting by the varistor in unit of an arrester.Press electric ring, magnetic red
Relay is failure to actuate.(2) it is converted when motor-car will enter AC system, and conversion in time emits when entering AC system disconnecting link,
Electric ring electric discharge is pressed, due to the effect of arc resistance, while varistor also has portion of electrical current mistake, and two strands of electric currents converge entrance
Ground wire, reed relay are influenced generation magnetic field by electric current and send out signal cut breaker.After releasing failure, it can restore to supply
Electricity.(3) meeting output signal, reminder alerting when alternating current-direct current voltage limiter is when straight-flow system works, itself breaks down.(4) by
Be made of silicon steel sheet in the power frequency Open magnetic ring 61 of reed relay, thus his response frequency 400 hereinafter, 400 hertz with
On will not then respond.
The invention will be further described below in conjunction with the accompanying drawings.
Description of the drawings
Attached drawing 1 is specific embodiment of the invention structural front view；
Attached drawing 2 is specific embodiment of the invention structural side view；
Attached drawing 3 is the enlarged drawing of specific embodiment of the invention part A；
Direct current arrester element 1 upper press electric ring 2, upper ring body 21, upper bracket 22, inverted U chamber 23, lower presses electricity
Ring 3, lower ring body 31, lower bracket 32, U-shaped cavity 33, striking electric discharge cone 4, cone head 41, connecting pole 42, nut 5, power frequency opening
Magnet ring 61, normally-open normally-close tongue tube 62, magnetic ring shell 63, earth lead 7, aviation socket 8, signal lead-out wire 81,
Connecting flange 11, bolt 12, felt pad 13, fastening bolt 14.
Specific implementation mode
Specific embodiments of the present invention are alternating current-direct current voltage limiter as shown in Figs. 1-3, including direct current arrester element 1, are pressed
Ring, direct current arrester element 1 are connected in parallel to form alternating current-direct current voltage limiter ontology with grading ring, and alternating current-direct current voltage limiter ontology is connected with
Reed relay, reed relay penetrate alternating current-direct current voltage limiter ontology lower end and draw earth lead 7, magnetic red relay in a series arrangement
Device includes normally-open normally-close contact, and normally-open normally-close contact is connect by normally-open normally-close contact lead with aviation socket 8, aviation socket 8
It is connected with signal lead-out wire 81, alternating current-direct current voltage limiter ontology lower end is equipped with connecting flange 11, and connecting flange 11 is equipped with bolt 12,
It is connected by felt pad 13 between bolt 12 and connecting flange 11, earth lead 7 and reed relay are pacified by fastening bolt 14
On connecting flange 11 loaded on alternating current-direct current voltage limiter ontology.
Above-mentioned grading ring include be respectively arranged in 1 upper end of direct current arrester element, 1 lower end of direct current arrester element it is upper
Press electric ring 2 and it is lower press electric ring 3, it is lower to press that also uniformly distributed on electric ring 3 there are four striking electric discharge cones 4.
The above-mentioned upper electric ring 2 that presses includes upper ring body 21, and upper ring body 21 is installed on direct current arrester element 1 through upper bracket 22
Upper end, upper ring body 21 and the connection of upper bracket 22 form inverted U chamber 23, which covers on direct current arrester element 1
Portion, the lower electric ring 3 that presses includes lower ring body 31, and lower ring body 31 is installed on through lower bracket 32 on connecting flange 11,31 He of lower ring body
The connection of lower bracket 32 forms U-shaped cavity 33, which covers at 1 lower part of direct current arrester element, upper ring body 21 and lower ring body 31
It is corresponding up and down.
The 31 equal showing ellipsoidal structure in respective cross section of above-mentioned upper ring body 21 and lower ring body.Upper ring body 21 and lower ring body 31 are adopted
It is made of 304 stainless steels.
Above-mentioned striking electric discharge cone 4 includes cone head 41, connecting pole 42, and cone head 41 is located at lower ring body 31 towards upper ring
The end face of body 21,42 one end of connecting pole are connect with cone head 41, and 42 other end of connecting pole passes through lower ring body 31 solid through nut 5
It is fixed.
Above-mentioned reed relay includes the power frequency Open magnetic ring 61 of no coiling, normally-open normally-close tongue tube 62, it is normally opened often
It closes tongue tube 62 and is installed on the magnetic for being fitted into together after the opening of power frequency Open magnetic ring 61 and forming encapsulating structure in magnetic ring shell 63
Spring relay.Above-mentioned power frequency Open magnetic ring 61 is made of silicon steel material.
The present invention is not limited to above-mentioned specific implementation mode, and persons skilled in the art are according to disclosed by the invention interior
Hold, other a variety of specific implementation modes may be used and implement of the invention or every design structure using the present invention and think of
Road does simple change or change, both falls within protection scope of the present invention.
Claims (8)
1. a kind of alternating current-direct current voltage limiter, including direct current arrester element, it is characterised in that：Further include grading ring, direct current arrester
Element is connected in parallel to form alternating current-direct current voltage limiter ontology with grading ring, and alternating current-direct current voltage limiter ontology is connected with reed relay, magnetic
Spring relay penetrates alternating current-direct current voltage limiter ontology lower end and draws earth lead in a series arrangement, and reed relay includes normally-open normally-close
Contact, normally-open normally-close contact are connect by normally-open normally-close contact lead with aviation socket, and aviation socket is connected with signal lead-out wire,
The alternating current-direct current voltage limiter ontology lower end is equipped with connecting flange, and connecting flange is equipped with bolt, leads between bolt and connecting flange
Felt pad connection is crossed, the earth lead and reed relay are installed on the connection of alternating current-direct current voltage limiter ontology by fastening bolt
On flange.
2. alternating current-direct current voltage limiter according to claim 1, it is characterised in that：The grading ring includes being respectively arranged in direct current
Unit of an arrester upper end, direct current arrester element lower end it is upper press electric ring and it is lower press electric ring, it is lower to press on electric ring
It is also uniformly distributed that there are four striking electric discharge cones.
3. alternating current-direct current voltage limiter according to claim 2, it is characterised in that：It is described it is upper to press electric ring include upper ring body,
Upper ring body is installed on direct current arrester element upper end through upper bracket, and upper ring body connects to form inverted U chamber with upper bracket, the inverted U
Chamber containment is set to direct current arrester member upper, it is described it is lower to press electric ring include lower ring body, lower ring body is installed on company through lower bracket
On acting flange, lower ring body connects to form U-shaped cavity with lower bracket, which covers at direct current arrester element lower portions, upper ring body and
Lower ring body is corresponding up and down.
4. alternating current-direct current voltage limiter according to claim 3, it is characterised in that：The upper ring body and lower ring body are respective transversal
The equal showing ellipsoidal structure in face.
5. alternating current-direct current voltage limiter according to claim 3 or 4, it is characterised in that：The striking electric discharge cone includes cone head
Portion, connecting pole, cone head are located at lower ring body towards the end face of upper ring body, and connecting pole one end is connect with cone head, connecting pole
The other end is fixed across lower ring body through nut.
6. alternating current-direct current voltage limiter according to claim 5, it is characterised in that：The upper ring body and lower ring body use metal material
Material is made.
7. alternating current-direct current voltage limiter according to any one of claims 1-4, it is characterised in that：The reed relay includes
Power frequency Open magnetic ring, normally-open normally-close tongue tube without coiling, normally-open normally-close tongue tube are installed on opening for power frequency Open magnetic ring
The reed relay that encapsulating structure is formed in magnetic ring shell is fitted into after at mouthful together.
8. alternating current-direct current voltage limiter according to claim 7, it is characterised in that：The power frequency Open magnetic ring is silicon steel material
It is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710445541.9A CN107316724B (en) | 2017-06-14 | 2017-06-14 | Alternating current-direct current voltage limiter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710445541.9A CN107316724B (en) | 2017-06-14 | 2017-06-14 | Alternating current-direct current voltage limiter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107316724A CN107316724A (en) | 2017-11-03 |
| CN107316724B true CN107316724B (en) | 2018-10-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710445541.9A Active CN107316724B (en) | 2017-06-14 | 2017-06-14 | Alternating current-direct current voltage limiter |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109461554B (en) * | 2018-10-12 | 2020-10-23 | 温州益坤电气股份有限公司 | Overvoltage protection device for parallel resistor gap |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE559792A (en) * | 1956-09-15 | |||
| CN2919640Y (en) * | 2006-07-14 | 2007-07-04 | 西安盟创电器有限公司 | Neutrality point grounding protecting device |
| CN101083165B (en) * | 2007-06-26 | 2010-08-04 | 中国石化集团胜利石油管理局电力管理总公司 | Lightning arrester with thermal excitation dropper |
| CN201084505Y (en) * | 2007-09-14 | 2008-07-09 | 西安电力机械制造公司 | A high-pressure ceramic casing arrester |
| CN103545059B (en) * | 2013-10-29 | 2016-09-21 | 国家电网公司 | A kind of insulator that can reduce lightning stroke flashover accident |
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| Publication number | Publication date |
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| CN107316724A (en) | 2017-11-03 |
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Address after: 325401 Yikun Electric Company, Hexiang Road, Aojiang Town, Pingyang County, Wenzhou City, Zhejiang Province Patentee after: Wenzhou Yikun Electric Co., Ltd. Address before: 325401 Yikun Electric Company, Hexiang Road, Aojiang Town, Pingyang County, Wenzhou City, Zhejiang Province Patentee before: Wenzhou Yikun Electric Co., Ltd. |
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