CN108288849A - A kind of superconducting current-limiting formula low-loss mixed DC breaker and its drop-out current method - Google Patents
A kind of superconducting current-limiting formula low-loss mixed DC breaker and its drop-out current method Download PDFInfo
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- CN108288849A CN108288849A CN201810243930.8A CN201810243930A CN108288849A CN 108288849 A CN108288849 A CN 108288849A CN 201810243930 A CN201810243930 A CN 201810243930A CN 108288849 A CN108288849 A CN 108288849A
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- mechanical switch
- superconducting
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000010521 absorption reaction Methods 0.000 claims abstract description 15
- 230000009194 climbing Effects 0.000 claims abstract description 6
- 238000010791 quenching Methods 0.000 claims abstract description 4
- 230000000171 quenching effect Effects 0.000 claims abstract description 3
- 239000004020 conductor Substances 0.000 claims description 2
- 230000005284 excitation Effects 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 238000012946 outsourcing Methods 0.000 claims description 2
- 239000003973 paint Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 6
- 238000010891 electric arc Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/268—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for dc systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/025—Disconnection after limiting, e.g. when limiting is not sufficient or for facilitating disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Abstract
The present invention relates to a kind of superconducting current-limiting formula low-loss mixed DC breaker and its drop-out current method, which is made of the through-flow branch of mechanical switch-type, current-limiting type energy transfer branch, energy absorption branch and end of incoming cables A1 and leading-out terminal A2；Wherein mechanical switch branch routing Fast mechanical switch composition, operating mechanism are rapid repulsion mechanism, and arc quenching method uses and applies high-frequency rotating transverse magnetic field structure outside, with direct current connecting-disconnecting function, arc voltage is high, makes electric current in the case that normal through-flow, substantially without conduction loss；Current-limiting type energy transfer branch routing electronic power switch is composed in series with current limiter；Energy absorption branch route arrester and constitutes；The invention also discloses the methods of the dc circuit breaker drop-out current；The present invention after fault current appearance can quick-speed turning on-off, the climbing of fault current is limited, can in the case that it is normal it is through-flow be lost it is small.
Description
Technical field
The present invention relates to a kind of superconducting current-limiting formula low-loss mixed DC breaker and its drop-out current method, can be used for straight
It flows in power supply system, such as track drawing system, in ship power supply system and direct current transportation net.
Background technology
In DC power-supply system, peak value of short is high, and short circuit current climbing speed is fast, traditional mechanical breaker by
The limitation of own structural characteristics and straight-flow system electric current without zero crossing, turn it off the fault current time it is longer in addition shutdown lose
It loses.
All-controlling power electronics device is quickly grown in recent years, and break is short and breaking course is without electric arc, but its
It is serious that big fever is lost in the case of on-state, affects its application range.Utilize full-control type power electronic switch and mechanical switch phase
In conjunction with cut-offfing the concern that the method for straight-flow system short-circuit current causes more and more people.But currently used for commercialized mixed
Box-like dc circuit breaker is largely forced commutation type, and change of current branch selects more full-control type power electronic switch connection in series-parallel groups
At structure and control are complicated；Mechanical switch and full-control type power electronic switching device are used in specified through-flow branch, increases open circuit
Conduction loss of the device in nominal operation.Therefore low-loss is developed, the high hybrid dc circuit breaker of reliability becomes and compels to be essential
It wants.
Invention content
In order to overcome the above-mentioned problems of the prior art, the purpose of the present invention is to provide a kind of low damages of superconducting current-limiting formula
Mixed DC breaker and its drop-out current method are consumed, mechanical switch-type is through-flow, and branch I completes normal on state current, full-control type electricity
Power electronic switch 2 and current limiter 3 are with being combined into current-limiting type energy transfer branch II, fault current limiting, excess energy consumption by
Energy absorption branch III is completed；It can realize that normal on-state loss is low, cut-out failure time of short circuit is short, the low, cost of complete machine energy consumption
Low advantage.
To achieve the above objectives, the present invention adopts the following technical scheme that：
A kind of superconducting current-limiting formula low-loss mixed DC breaker, including phase and the through-flow branch I of mechanical switch-type even, limit
Flow pattern energy transfer branch II and energy absorption branch III further includes end of incoming cables A1 and the outlet for being connected to parallel branch both ends
Hold A2.
The through-flow branch I of mechanical switch-type is made of Fast mechanical switch 1, and operating mechanism is rapid repulsion mechanism,
Arc quenching method has direct current connecting-disconnecting function, arc voltage is high, makes electric current normal using high-frequency rotating transverse magnetic field structure is applied outside
In the case of through-flow, no conduction loss.
The Fast mechanical switch 1 includes vacuum interrupter 11, the operating mechanism 12 of vacuum interrupter 11 and external rotation
Turn field generator for magnetic composition；The external generation device of rotating magnetic field is by n to being spatially symmetrically arranged in vacuum interrupter 11
The coil unit 13 of surrounding forms；Pass through the electric current i with certain phase difference in each pair of coil unit 131、i2…in。
Each pair of coil unit 13 is connected in series by two opposite coils, and each coil is more by the conductor of outsourcing insulation coat of paint
Layer coiling forms.
The energy absorption branch III is made of arrester 4, for absorbing the dump energy after switch OFF in circuit.
The current-limiting type energy transfer branch II is in series and is constituted by full-control type power electronic switch 2 and current limiter 3.
The current limiter 3 uses superconducting tape.
There are matching relationships with full-control type power electronic switch 2 for the selection of the superconducting tape, meet superconducting tape by surpassing
Lead matching of the state to the 2 on-state ability of conversion time and full-control type power electronic switch of Resistance states.
The full-control type power electronic switch 2 is IGBT or IEGT.
The method of the superconducting current-limiting formula low-loss mixed DC breaker drop-out current, under accidental conditions,
Electric current flows through the through-flow branch I of mechanical switch-type, since 1 On-resistance of Fast mechanical switch is small, to the hybrid direct current interruption
Device is lost small under nominal operating conditions；When short trouble occurs for system, fault current is flowed into from end of incoming cables A1, Quick mechanical
Switch 1 obtains action command, and full-control type power electronic switch 2 obtains trigger signal；It is quick in mechanical switch-type is through-flow branch I
Mechanical switch 1 is opened rapidly, contact gap arcing, when 1 contact of Fast mechanical switch is completely separable, 1 both ends of Fast mechanical switch
Voltage is more than the conducting voltage of full-control type power electronic switch 2, and full-control type power electronic switch 2 is connected, current-limiting type energy transfer
The Fast mechanical switch 1 of branch II conducting, mechanical switch-type is through-flow branch I ceases arc；Current limiter 3, which enters, quenches state, current-limiting type
Energy transfer branch II resistance increases, fault current limiting climbing；Current-limiting type energy transfer branch II terminal voltages increase, and are more than
Energy absorption branch III conducting voltages, arrester 4 are connected, and absorb excess energy, and full-control type power electronic switch 2 ends, electric current
It gradually is transferred to energy absorption branch III, until 4 current over-zero of arrester, completes to cut-off, fault current is removed.
Compared with prior art, the invention has the advantages that：
The superconducting current-limiting formula low-loss mixed DC breaker of the present invention, key technology are that specified open position is through-flow
It is lost small.The part that conducting is participated under specified open position is only completed by Fast mechanical switch 1, and through-flow loss is small, can reduce
Energy loss.
The superconducting current-limiting formula low-loss mixed DC breaker of the present invention, it is simple that key technology is that electric current transfer is realized
Rapidly.Fast mechanical switch 1 is connected to trip command, and dynamic/static contact is separated, and 1 both end voltage of Fast mechanical switch is more than full-control type electricity
The forward conduction voltage drop of power electronic switch 2, at this time current limiter 3 be in superconducting state, resistance is almost nil, current-limiting type energy transfer
Branch II is connected rapidly, arc extinction between 1 contact of Fast mechanical switch, the II conductings of current-limiting type energy transfer branch, electric current success
It is transferred to current-limiting type energy transfer branch II.
The superconducting current-limiting formula low-loss mixed DC breaker of the present invention, key technology are current-limiting type energy transfer branch
Road II is simply easily realized.Current-limiting type energy transfer branch II is composed in series by full-control type power electronic switch 2 and current limiter 3, limit
Stream device 3 selects suitable superconducting tape parameter, is matched with full-control type power electronic switch 2, the II letters of current-limiting type energy transfer branch
It is single easily to realize.
The superconducting current-limiting formula low-loss mixed DC breaker of the present invention, key technology are current-limiting type energy transfer branch
Road II has current limiting features.It is transformed by superconducting state that quench state for time short using 3 superconducting tape of current limiter, to fault current
Climbing plays restriction effect.
The superconducting current-limiting formula low-loss mixed DC breaker of the present invention, key technology are energy absorption branch III.
3 superconducting tape of current limiter quenches rear current-limiting type energy transfer branch II terminal voltages and increases sharply, and is more than 4 operation voltage of arrester,
The III conductings of energy absorption branch, full-control type power electronic switch 2 end, and electric current is gradually transferred to energy absorption branch III, directly
It to 4 current over-zero of arrester, completes to cut-off, fault current is removed.
Description of the drawings
Fig. 1 is superconducting current-limiting formula low-loss mixed DC breaker circuit figure of the present invention.
Fig. 2 is Fast mechanical switch structural schematic diagram.
Specific implementation mode
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
As shown in Figure 1, under accidental conditions, electric current flows through the through-flow branch I of mechanical switch-type, since Quick mechanical is opened
It is small to close 1 On-resistance, to the hybrid dc circuit breaker be lost under nominal operating conditions it is small.When short trouble occurs for system
When, fault current is flowed into from end of incoming cables A1, and Fast mechanical switch 1 obtains action command, and full-control type power electronic switch 2 is touched
It signals.Fast mechanical switch 1 in mechanical switch-type is through-flow branch I is opened rapidly, contact gap arcing, Fast mechanical switch
When 1 contact is completely separable, 1 both end voltage of Fast mechanical switch is more than the conducting voltage of full-control type power electronic switch 2, full-control type
Electronic power switch 2 is connected, current-limiting type energy transfer branch II conducting, the Fast mechanical switch 1 of mechanical switch-type is through-flow branch I
Cease arc.Current limiter 3 enters the state that quenches, and current-limiting type energy transfer branch II resistance increases, fault current limiting climbing.Current limliting
Type energy transfer branch II terminal voltages increase, and are more than energy absorption branch III conducting voltages, and arrester 4 is connected, and absorbs extra energy
Amount, full-control type power electronic switch 2 end, and electric current is gradually transferred to energy absorption branch III, until 4 current over-zero of arrester,
Completion is cut-off, and fault current is removed.
As shown in Fig. 2, Fast mechanical switch 1 include vacuum interrupter 11, vacuum interrupter 11 operating mechanism 12 and
External generation device of rotating magnetic field composition；The external generation device of rotating magnetic field is gone out by n to being spatially symmetrically arranged in vacuum
Coil unit 13 around arc chamber 11 forms；Pass through the electric current i with certain phase difference in each pair of coil unit 131、i2…in。
It is cut-off for three steps as shown in Fig. 2, Fast mechanical switch 1 divides：When failure occurs, operating mechanism 12 acts, and vacuum interrupter 11 touches
Head is opened, and electric arc is generated；Respectively by with certain phase difference in the coil unit 13 arranged around vacuum interrupter 11
Electric current i1、i2…in, transverse rotating magnetic field is generated inside vacuum interrupter 11；Electric arc moves under rotating excitation field effect, electric arc
Voltage rises, and realization is cut-off.
Claims (10)
1. a kind of superconducting current-limiting formula low-loss mixed DC breaker, it is characterised in that：Mechanical switch-type including phase and company is logical
Branch (I), current-limiting type energy transfer branch (II) and energy absorption branch (III) are flowed, further includes being connected to parallel branch both ends
End of incoming cables (A1) and leading-out terminal (A2).
2. superconducting current-limiting formula low-loss mixed DC breaker according to claim 1, it is characterised in that：The machinery is opened
Pass type is through-flow, and branch (I) is made of Fast mechanical switch (1), and operating mechanism is rapid repulsion mechanism, and arc quenching method is using outer
High-frequency rotating transverse magnetic field structure is applied, there is direct current connecting-disconnecting function, arc voltage is high, makes electric current in normal through-flow, nothing
Conduction loss.
3. superconducting current-limiting formula low-loss mixed DC breaker according to claim 2, it is characterised in that：The quick machine
Tool switch (1) includes that vacuum interrupter (11), the operating mechanism (12) of vacuum interrupter (11) and external rotating excitation field occur
Device forms；The external generation device of rotating magnetic field is by n to being spatially symmetrically arranged in the line of vacuum interrupter (11) around
Coil unit (13) forms；Pass through the electric current i with certain phase difference in each pair of coil unit (13)1、i2…in。
4. superconducting current-limiting formula low-loss mixed DC breaker according to claim 3, it is characterised in that：Each pair of coil list
First (13) are connected in series by two opposite coils, and each coil is formed by the conductor sandwich wound of outsourcing insulation coat of paint.
5. superconducting current-limiting formula low-loss mixed DC breaker according to claim 1, it is characterised in that：The energy is inhaled
Revenue and expenditure road (III) is made of arrester (4), for absorbing the dump energy after switch OFF in circuit.
6. superconducting current-limiting formula low-loss mixed DC breaker according to claim 1, it is characterised in that：The current-limiting type
Energy transfer branch (II) is in series and is constituted by full-control type power electronic switch (2) and current limiter (3).
7. superconducting current-limiting formula low-loss mixed DC breaker according to claim 6, it is characterised in that：The current limiter
(3) superconducting tape is used.
8. superconducting current-limiting formula low-loss mixed DC breaker according to claim 7, it is characterised in that：The superconductive tape
There are matching relationships with full-control type power electronic switch (2) for the selection of material, meet superconducting tape and are turned by superconducting state to Resistance states
Change the matching of time and full-control type power electronic switch (2) on-state ability.
9. superconducting current-limiting formula low-loss mixed DC breaker according to claim 6, it is characterised in that：The full-control type
Electronic power switch (2) is IGBT or IEGT.
10. the method for claim 1 to 9 any one of them superconducting current-limiting formula low-loss mixed DC breaker drop-out current,
It is characterized in that：Under accidental conditions, electric current flows through the through-flow branch of mechanical switch-type (I), due to Fast mechanical switch (1)
On-resistance is small, to the hybrid dc circuit breaker be lost under nominal operating conditions it is small；When short trouble occurs for system,
Fault current is flowed into from end of incoming cables (A1), and Fast mechanical switch (1) obtains action command, and full-control type power electronic switchs (2) and obtains
To trigger signal；Fast mechanical switch (1) in mechanical switch-type is through-flow branch (I) is opened rapidly, contact gap arcing, quickly
When mechanical switch (1) contact is completely separable, Fast mechanical switch (1) both end voltage is more than full-control type power electronic switch (2)
Conducting voltage, full-control type power electronic switch (2) conducting, and current-limiting type energy transfer branch (II) conducting, mechanical switch-type is through-flow
The Fast mechanical switch (1) of branch (I) ceases arc；Current limiter (3), which enters, quenches state, current-limiting type energy transfer branch (II) resistance
Increase, fault current limiting climbing；Current-limiting type energy transfer branch (II) terminal voltage increases, and is more than energy absorption branch
(III) conducting voltage, arrester (4) conducting absorb excess energy, and full-control type power electronic switchs (2) cut-off, and electric current gradually turns
Energy absorption branch (III) is moved to, until arrester (4) current over-zero, completes to cut-off, fault current is removed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810243930.8A CN108288849A (en) | 2018-03-23 | 2018-03-23 | A kind of superconducting current-limiting formula low-loss mixed DC breaker and its drop-out current method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810243930.8A CN108288849A (en) | 2018-03-23 | 2018-03-23 | A kind of superconducting current-limiting formula low-loss mixed DC breaker and its drop-out current method |
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| CN108288849A true CN108288849A (en) | 2018-07-17 |
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| CN201810243930.8A Pending CN108288849A (en) | 2018-03-23 | 2018-03-23 | A kind of superconducting current-limiting formula low-loss mixed DC breaker and its drop-out current method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112865516A (en) * | 2021-02-26 | 2021-05-28 | 华北电力大学 | Active resonance type direct current change-over switch and control method thereof |
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2018
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Patent Citations (6)
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| CN103633631A (en) * | 2013-10-16 | 2014-03-12 | 国家电网公司 | Method for breaking high-voltage (HV) superconducting current-limiting direct current (DC) circuit breaker |
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