CN107993889A - 70kA/20kV quenches the stage type explosion switch in protection system - Google Patents
70kA/20kV quenches the stage type explosion switch in protection system Download PDFInfo
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- CN107993889A CN107993889A CN201711204844.8A CN201711204844A CN107993889A CN 107993889 A CN107993889 A CN 107993889A CN 201711204844 A CN201711204844 A CN 201711204844A CN 107993889 A CN107993889 A CN 107993889A
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- unit
- explosion
- tubular conductor
- conductive plate
- protection system
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The stage type explosion switch in protection system is quenched the invention discloses a kind of 70kA/20kV; include convertor unit and insulating unit; the upper conductive plate of the convertor unit is connected with busbar introduces electric current; the lower conducting plate of convertor unit is connected by busbar with insulating unit lower conducting plate; conductive plate is connected with busbar on insulating unit picks out electric current; when detecting that explosion driving convertor unit acts, completes the change of current of electric current first when quenching signal；After current over-zero, explosion driving insulating unit execution, establishes the satisfactory class of insulation.The present invention can reduce difficulty of processing, easy to assemble, and the cooling water channel for being easy to the split Central Shanxi Plain realizes sealing；The cooling effectiveness of cooling water channel of the present invention is higher than same category of device；The present invention is reduced significantly the volume of same category of device, reduces processing cost.
Description
Technical field
The present invention relates to superconducting tokamak power system technologies field, more particularly to one kind
70kA/20kV quenches the stage type explosion switch in protection system.
Background technology
Vertical field and poloidal field power supply system are national big science engineering Superconducting tokamak nuclear fusion experimental device systems
In important component, it to vertical field and poloidal field superconducting magnet coil by powering, to realize the generation of plasma, about
Beam, heating, balance and control.Safe operation and Physical Experiment success or failure of the safe and reliable operation of superconducting coil for device, have
Vital effect.During device normal operation, huge magnetic field energy is stored in superconducting magnet, once superconducting magnet occurs
Quench, store huge energy therein and must shift immediately and discharge, otherwise will damage superconducting magnet, cause inestimable
Loss.Therefore how storage wherein energy transfer to be released to protect safe operation of the magnet to whole fusion facility very heavy
Will.
Explosion switch is a kind of mechanical switch of explosive driving, is series in major loop, carries long-term work electric current.Its is excellent
Point is there is that simple in structure, disjunction is rapid, reliability is high.Explosion switch is taken away by the water cooling system of itself
When high current is run, most of heat caused by switch, makes the temperature of whole switch internal be no more than the peace of explosive and detonator
Complete not flash point, ensure that the safe and reliable work of switch.
Explosion switch basic functional principle is：When quenching signal arrival detonator trigger device, detonator trigger element is at once
Time break detonating primer and explosive are sent, under the huge detonation pressure that explosive charge produces, transmission medium expands rapidly production
Raw immense pressure causes conductor part deformation, so as to cut off major loop.Explosion switch is single plant, after each disjunction, it is necessary to
Replace disjunction conductor part and driving mechanism.
The breaker is known as quick response, the breaker of highly reliable explosion driving is used in several occasions such as power compression
With electric power system back-up breaker.As back-up breaker, when main circuit breaker is in failure electric current during cisco unity malfunction,
This indispensable part ensure that the safety of system and the safety of operating personnel.This is for high pressure and high current system, such as
It is particularly important that superconducting coil electric power system.In this case, fault current be likely to result in immeasurable economic loss and
Heavy casualties.
Single stage type explosion switch has been used for disjunction voltage and current grade circuit within the specific limits.But when existing
When structure is applied in the system of the voltage and current grade of higher, equipment size can increased dramatically so as to cause the increase of cost
With the reduction of reliability.Stage type explosion switch is studied and applies in some nearest systems.Switch the association between two-stage
Operation is adjusted to enable breaker disjunction high voltage and the circuit of high current, existing stage type explosion switch is usually complicated, leads
Cause it to have and process the problems such as cumbersome, assembling is difficult, cooling water channel is complicated and seal request is difficult to reach.
The content of the invention
The defects of the object of the invention is exactly to make up prior art, there is provided a kind of 70kA/20kV is quenched in protection system
Stage type explosion switch.
The present invention is achieved by the following technical solutions：
A kind of 70kA/20kV quenches the stage type explosion switch in protection system, includes convertor unit and insulating unit, described
The upper conductive plate of convertor unit be connected with busbar and introduce electric current, the lower conducting plate of convertor unit pass through busbar with insulating unit
Conductive plate is connected, and conductive plate is connected with busbar on insulating unit picks out electric current, when detect quench signal when, the explosion driving change of current
Unit acts, completes the change of current of electric current first；After current over-zero, explosion driving insulating unit execution, foundation meets the requirements
The class of insulation.
The convertor unit includes tubular conductor, explosive one, deionized water and support epoxide ring, the support ring
For oxygen ring set in the outside of tubular conductor, deionized water flows through tubular conductor, and explosive one is installed on tubular conductor.
The insulating unit includes explosion cavity, explosive two, insulating cylinder and conductive plate, the conductive plate and is installed on
The bottom of insulating cylinder, explosion cavity are installed on the top of insulating cylinder, and explosive two is installed on the upper end of explosion cavity, will be quick-fried after ignition
Fried shock wave pushes down on insulating cylinder.
The explosive one is cylindric, installed in the center of tubular conductor, will uniformly be sent after ignition to tubular conductor
Explosion wave.
Annular groove has been equidistantly distributed in the outer surface of the tubular conductor, stress concentration, support are produced in explosion time
Epoxide ring is distributed among annular groove, and being changed into required shape for cutting shape after the explosion of tubular conductor provides support, supports epoxide ring
Section with the contact portion of tubular conductor is arc-shaped.
It is attached between the tubular conductor and the upper and lower conductive plate of convertor unit by ring-type wedge shape block structure,
Tubular conductor is closely connected to reduce contact resistance by the wedge block by the adjusting of bolt pretightening with conductive plate.
Two pairs of split annular grooves of upper and lower surface, insulating cylinder and annular groove is distributed with the insulating unit on conductive plate
Contact.
It is an advantage of the invention that：（1）The present invention can reduce difficulty of processing, easy to assemble, and be easy to the cooling water in the split Central Shanxi Plain
Realize sealing in road；
（2）The cooling effectiveness of cooling water channel of the present invention is higher than same category of device；
（3）The present invention is reduced significantly the volume of same category of device, reduces processing cost.
Brief description of the drawings
Fig. 1 is the circuit topology figure of the present invention.
Fig. 2 is explosion switch shape assumption diagram.
Fig. 3 is the internal view of convertor unit and insulating unit（Fig. 3 a are convertor unit internal view, and Fig. 3 b are exhausted
Edge unit internal view）.
Fig. 4 is wedge-shaped block structural diagram.
Embodiment
As shown in Figure 1, 2, a kind of 70kA/20kV quenches the stage type explosion switch in protection system, includes change of current list
Member 1 and insulating unit 2, the upper conductive plate of the convertor unit 1 is connected with busbar introduces electric current, the lower conduction of convertor unit 1
Plate is connected by busbar with 2 lower conducting plate of insulating unit, and conductive plate is connected with busbar on insulating unit 2 picks out electric current, works as detection
To when quenching signal, explosion driving convertor unit 1 acts, completes the change of current of electric current first；After current over-zero, explosion driving insulation
2 execution of unit, establishes the satisfactory class of insulation.
The convertor unit 1 includes tubular conductor 3, explosive 1, deionized water 5 and support epoxide ring 6, described
Support epoxide ring 6 is sleeved on the outside of tubular conductor 3, and deionized water 5 is flowed through inside tubular conductor 3, and explosive 1 is led installed in tubular
Inside body 3.
The insulating unit 2 includes explosion cavity 7, explosive 28, insulating cylinder 9 and conductive plate 10, the conductive plate
10 are installed on the bottom of insulating cylinder 9, and explosion cavity 7 is installed on the top of insulating cylinder 9, and explosive 28 is installed on the upper of explosion cavity 7
End, insulating cylinder is pushed down on after ignition by explosion wave.
The explosive 1 is cylindric, installed in the center of tubular conductor 3, will uniformly be sent out after ignition to tubular conductor
Go out explosion wave.
Annular groove has been equidistantly distributed in the outer surface of the tubular conductor 3, stress concentration, support are produced in explosion time
Epoxide ring 6 is distributed among annular groove, and being changed into required shape for cutting shape after the explosion of tubular conductor 3 provides support, supports epoxy
Ring 6 and the section of the contact portion of tubular conductor 3 are arc-shaped.
As shown in figure 4, pass through ring-type wedge block 11 between the tubular conductor 3 and the upper and lower conductive plate of convertor unit 1
Structure is attached, and tubular conductor is closely connected to drop by the wedge block 11 by the adjusting of bolt pretightening with conductive plate
Low contact resistance.
Two pairs of split annular grooves of upper and lower surface, insulating cylinder 9 and annular is distributed with the insulating unit 2 on conductive plate
Groove contacts.
The topological structure for quenching protection circuit system is as shown in Figure 1.Whole explosion switch can be divided into two parts.First
Divide and be known as convertor unit.In the case of there is baulk when main circuit breaker is quenching, control centre will trigger explosion switch
Acted.In action process, the convertor unit disjunction under the shock wave of explosive first, disjunction will produce multiple electric arcs, this
Will be so that explosion switch both ends produce voltage and electric current is commutated.Part II is known as insulating unit.The unit commutates in electric current
After the completion of establish insulation.
Convertor unit and insulating unit are driven by explosive.As shown in Fig. 3 (a), the critical piece of convertor unit is
Tubular conductor, explosive, support epoxide ring.Tubular conductor is the thin-walled cylinder that circular groove is disposed with along outside.These grooves with
Middle epoxide ring installed in each two groove plays the role of stress concentration together, with tubular conductor after ensuring explosion according to setting
Meter requirement is deformed.Deionized water is flowed through in tubular conductor, as cooling medium and the pressure transmission medium of detonation wave.
Explosive is arranged on the central axes of tubular conductor.
Due to caused by explosion product in tubular conductor cooling water pollution, commutation switch can only carry within the extremely short time
For the change of current to voltage.Therefore, insulating unit is equipped with independent explosive charge, connects with convertor unit, it is necessary to be completed in the change of current
Immediate operation and establish insulation afterwards.As shown in Fig. 3 (b), the critical piece of insulating unit is conductive plate, insulating cylinder and explosive.It is quick-fried
Fried pressure moves downward insulating cylinder and cuts conductive plate, has circular groove on conductive plate disk, makes conductive column with flowing into conductor point
Open, so as to establish the dielectric strength needed for circuit.
Claims (7)
1. a kind of 70kA/20kV quenches the stage type explosion switch in protection system, it is characterised in that：Include convertor unit and
Insulating unit, the upper conductive plate of the convertor unit is connected with busbar introduces electric current, and the lower conducting plate of convertor unit passes through mother
Row is connected with insulating unit lower conducting plate, and conductive plate is connected with busbar on insulating unit picks out electric current, and signal is quenched when detecting
When, explosion driving convertor unit acts, completes the change of current of electric current first；After current over-zero, explosion driving insulating unit is completed dynamic
Make.
2. a kind of 70kA/20kV according to claim 1 quenches the stage type explosion switch in protection system, its feature exists
In：The convertor unit includes tubular conductor, explosive one, deionized water and support epoxide ring, the support epoxide ring
The outside of tubular conductor is sleeved on, deionized water flows through tubular conductor, and explosive one is installed on tubular conductor.
3. a kind of 70kA/20kV according to claim 1 quenches the stage type explosion switch in protection system, its feature exists
In：The insulating unit includes explosion cavity, explosive two, insulating cylinder and conductive plate, and the conductive plate is installed on insulation
The bottom of cylinder, explosion cavity are installed on the top of insulating cylinder, and explosive two is installed on the upper end of explosion cavity.
4. a kind of 70kA/20kV according to claim 2 quenches the stage type explosion switch in protection system, its feature exists
In：The explosive one is cylindric, installed in the center of tubular conductor.
5. a kind of 70kA/20kV according to claim 2 quenches the stage type explosion switch in protection system, its feature exists
In：Annular groove is equidistantly distributed in the outer surface of the tubular conductor, support epoxide ring is distributed among annular groove, supports
Epoxide ring and the section of the contact portion of tubular conductor are arc-shaped.
6. a kind of 70kA/20kV according to claim 2 quenches the stage type explosion switch in protection system, its feature exists
In：It is attached between the tubular conductor and the upper and lower conductive plate of convertor unit by ring-type wedge shape block structure, the wedge
Tubular conductor is closely connected to reduce contact resistance by shape block by the adjusting of bolt pretightening with conductive plate.
7. a kind of 70kA/20kV according to claim 3 quenches the stage type explosion switch in protection system, its feature exists
In：Two pairs of split annular grooves of upper and lower surface are distributed with the insulating unit on conductive plate, insulating cylinder is contacted with annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711204844.8A CN107993889B (en) | 2017-11-27 | 2017-11-27 | 70kA/20kV quenches the stage type explosion switch in protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711204844.8A CN107993889B (en) | 2017-11-27 | 2017-11-27 | 70kA/20kV quenches the stage type explosion switch in protection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107993889A true CN107993889A (en) | 2018-05-04 |
| CN107993889B CN107993889B (en) | 2019-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711204844.8A Active CN107993889B (en) | 2017-11-27 | 2017-11-27 | 70kA/20kV quenches the stage type explosion switch in protection system |
Country Status (1)
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0147661A1 (en) * | 1983-12-30 | 1985-07-10 | Hüls Troisdorf Aktiengesellschaft | Mechanical power source actuated by gas pressure |
| CN1889220A (en) * | 2006-07-19 | 2007-01-03 | 中国科学院等离子体物理研究所 | Explosion circuit breaker |
-
2017
- 2017-11-27 CN CN201711204844.8A patent/CN107993889B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0147661A1 (en) * | 1983-12-30 | 1985-07-10 | Hüls Troisdorf Aktiengesellschaft | Mechanical power source actuated by gas pressure |
| CN1889220A (en) * | 2006-07-19 | 2007-01-03 | 中国科学院等离子体物理研究所 | Explosion circuit breaker |
Non-Patent Citations (1)
| Title |
|---|
| 温家良等: ""EAST托卡马克大功率双向直流快速晶闸管开关可靠关断理论分析及参数优化设计"", 《中国电机工程学报》 * |
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| Publication number | Publication date |
|---|---|
| CN107993889B (en) | 2019-07-02 |
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