CN107104423A - One kind division reactance type direct current current-limiting circuit breaker - Google Patents
One kind division reactance type direct current current-limiting circuit breaker Download PDFInfo
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- CN107104423A CN107104423A CN201710258529.7A CN201710258529A CN107104423A CN 107104423 A CN107104423 A CN 107104423A CN 201710258529 A CN201710258529 A CN 201710258529A CN 107104423 A CN107104423 A CN 107104423A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/021—Current limitation using saturable reactors
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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
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Abstract
One kind division reactance type direct current current-limiting circuit breaker, including current limiting unit and first kind switch, Equations of The Second Kind switch and the 3rd class switch.Wherein, the non-coupled inductance of current limiting unit or non-coupled superconduction inductance, or Same Name of Ends coupling inductance, or Same Name of Ends Coupled Superconducting inductance, or different name end Coupled Superconducting inductance.During failure current limit, switched by the first kind, Equations of The Second Kind switch and the 3rd class switch realize transformation of the inductance from parallel-connection structure to cascaded structure, so as to generate larger current-limiting resistance and inductance, fault current is effectively limited, the current limiting capacity of current limiter is improved.
Description
Technical field
Divide reactance type direct current current-limiting circuit breaker, more particularly to a kind of high pressure of flexible direct current power network the present invention relates to one kind
Direct current current-limiting circuit breaker.
Background technology
With the exploitation and application of the new energy such as wind-powered electricity generation, solar energy, the multiterminal flexible direct current based on voltage source converter
Technology of transmission of electricity occupies more and more important position in direct current transportation field.The new energy such as wind energy, solar power generation access power network
Biggest obstacle is that it is intermittent and uncertain, and Technology of HVDC based Voltage Source Converter can efficiently control electric energy, isolation power network event
The diffusion of barrier, and can also according to power network demand, it is quick, flexibly, adjustably send or absorb part energy, so as to optimize
Trend distribution, enhancing grid stability, the intellectuality for lifting power network and the controllability of power network.
Once occurring short trouble, equivalent to the electricity of Converter DC-side on the DC side circuit of multiterminal flexible direct current power network
Hold and directly discharge, its short circuit current flow can be in several milliseconds to peaking, and maximum typically there are several kilo-amperes to tens kilo-amperes.Larger
The problems such as current-rising-rate will bring heat concentration, arc spark, electromagnetic stress, meanwhile, because transverter typically uses IGBT
Or IGCT devices, its anti-paralleled diode can form uncontrollable rectifier bridge, thus merely control transverter can not disengagement failure electric current,
Short circuit current flow even can damage current conversion station.Direct-current short circuit electric current does not have zero crossing, and its peak value and climbing speed will be much high
In AC network, therefore, disconnected to direct-current short circuit failure and propose higher requirement.
Cut-offfing for fault current is also restricted by the technology development such as dc circuit breaker.Document " send out by dc circuit breaker technology
Exhibition summary " (south electric network technology, 02 phase in 2015) is realized and energy-absorbing branch road to mechanical chopper increase antiresonant circuit, real
Existing direct current cut-offs.But, exist cut-off with the quenching time it is longer the problem of.If using the side being pre-charged to antiresonant circuit
Formula improves the arc extinguishing speed of breaker, not only realizes that difficulty is big, and cut-off the demand that speed is also difficult to meet direct current network.
Institute of State Grid Intelligent Electric Grids show that high voltage DC breaker needs disjunction by taking the simulation result of the end DC network of Zhoushan five as an example
15KA electric current (flexible DC power transmission net novel high-pressure dc circuit breaker design, Automation of Electric Systems, 2013,37
(15):95-102.), mixed type high voltage DC breaker (the The Hybrid for the 320KV/2KA that ABB was completed in 2012
HVDC Breaker An innovation breakthrough enabling reliable HVDC grids.ABB Grid
Systems, Technical Paper Nov ' 2012), can disjunction 9KA fault current, but because cost is too high and does not put into business
With, and increase Breaking capacity and can only rely on the connection in series-parallel of more IGBT units, this can increase considerably breaker cost, reduction
Reliability.In a word, short-circuit current, which cut-offs problem, turns into the bottleneck that flexible DC power transmission net develops.
The content of the invention
In order to overcome the shortcomings of prior art, the present invention proposes a kind of direct current current-limiting open circuit for flexible direct current power network
Device, simple in construction, cost of the invention is low, can effectively limit direct current network fault current.
The technical solution adopted by the present invention is：
Present invention division reactance type direct current current-limiting circuit breaker include n current limiting unit U1, U2 ..., Un and individual 3rd classes of n
Switch W1, W2 ..., Wn-1, one the 3rd class switch of series connection, n=1,2 ... ..., n between two current limiting units.
Wherein, current limiting unit U1 switchs S11, S12, S13 and S14, Equations of The Second Kind by the first kind and switchs K1 and current limiting device M1
Composition, current limiting device M1 is made up of inductance L11 and inductance L12；Current limiting unit U2 by the first kind switch S21, S22, S23 and S24,
Equations of The Second Kind switchs K2 and current limiting device M2 compositions, and current limiting device M2 is made up of inductance L21 and inductance L22；The like, current limliting list
First Un switchs Sn1, Sn2, Sn3 and Sn4, Equations of The Second Kind switch Kn and current limiting device Mn by the first kind and constituted, and current limiting device Mn is by electricity
Feel Ln1 and inductance Ln2 compositions, n=1,2 ... ..., n.
In current limiting unit U1, described first kind switch S11, inductance L11 and first kind switch S12 is sequentially connected in series to form string
Join branch road, first kind switch S13, inductance L12 and first kind switch S14 are sequentially connected in series to form series arm, two series arms
It is connected in parallel between tie point A and B.Equations of The Second Kind switch K1 one end is connected to inductance L11 and the first kind switchs S12 tie point
On, the Equations of The Second Kind switch K1 other end is connected on first kind switch S13 and inductance L12 tie point, constitutes current limiting unit U1；
First kind switch S21, inductance L21 and first kind switch S22 are sequentially connected in series to form series arm, first kind switch S23, inductance
L22 and first kind switch S24 are sequentially connected in series to form series arm, and two series arms are connected in parallel between tie point A and B, and second
Class switch K2 one end is connected on inductance L21 and the first kind switch S22 tie point, Equations of The Second Kind switch K2 other end connection
On the tie point that the first kind switchs S23 and inductance L22, current limiting unit U2 is constituted；The like, first kind switch Sn1, inductance
Ln1 and the first kind switch Sn2 be sequentially connected in series to form series arm, the first kind switch Sn3, inductance Ln2 and the first kind switch Sn4 according to
Secondary series connection forms series arm, and two series arms are connected in parallel between tie point A and B, and Equations of The Second Kind switch Kn one end is connected to
On inductance Ln1 and the first kind switch Sn2 tie point, the Equations of The Second Kind switch Kn other end is connected to first kind switch Sn3 and electricity
On the tie point for feeling Ln2, current limiting unit Un is constituted.3rd class switch W1 one end be connected to current limiting unit U1 inductance L12 and
The first kind switchs S14 tie point, the 3rd class switch W1 other end connection current limiting unit U2 first kind switch S21 and inductance
L21 tie point；The 3rd class switch Wn-1 one end connection current limiting unit Un first kind switchs Sn1 and inductance Ln1 connection
On point, n=1,2 ... ..., n.
Main advantages of the present invention：
1. the present invention is engaged by current limiting device with the first kind, Equations of The Second Kind and the 3rd class switch, realize straight to flexibility
Flow effective limitation and the quick-speed turning on-off of the dc-side short-circuit fault electric current of power network；
2. the division reactance type direct current current-limiting circuit breaker of the present invention realizes current limiting device parallel running in stable state, reduce
Direct current current-limiting circuit breaker running wastage, reduces its influence to power network；
3. the division reactance type direct current current-limiting circuit breaker of the present invention, during failure current limit, passes through the first kind, Equations of The Second Kind
Transformation of the inductance from parallel-connection structure to cascaded structure is realized with the 3rd class switch, so as to generate larger current-limiting resistance and electricity
Sense, effectively limits fault current, improves the current limiting capacity of current limiter.
4. the division reactance type direct current current-limiting circuit breaker of the present invention, its current limiting unit is using two couplings or non-coupled, normal
Rule or superconduction induction structure, overcome the relatively low shortcoming of existing noninductive coil terminal voltage, are advantageously implemented transmission of electricity level flexible direct current
The failure current limit and quick-speed turning on-off of power network.
Brief description of the drawings
Fig. 1 is the schematic diagram of the specific embodiment of the invention 1；
Fig. 2 is the Same Name of Ends Coupled Inductor Circuit schematic diagram of current limiting device；
Fig. 3 is the different name end Coupled Inductor Circuit schematic diagram of current limiting device；
Fig. 4 is IGBT switching tubes opposing series configuration figure of the present invention；
Fig. 5 is IGBT switching tubes of the present invention and Diode series structure chart；
Fig. 6 is Thyristors in series structure chart of the present invention；
Fig. 7 is the schematic diagram of the specific embodiment of the invention 2.
Embodiment
The invention will be further described with reference to the accompanying drawings and detailed description.
Fig. 1, which show embodiments of the invention 1, is used for the division reactance type direct current current-limiting circuit breaker of flexible direct current power network.Should
Divide reactance type direct current current-limiting circuit breaker include multiple current limiting unit U1, U2 ..., Un and multiple 3rd classes switch W1,
W2、……、Wn-1.Wherein, current limiting unit U1 switchs S11, S12, S13 and S14, Equations of The Second Kind by the first kind and switchs K1 and current limiter
Part M1 is constituted, and current limiting device M1 is made up of inductance L11 and inductance L12；Current limiting unit U2 by the first kind switch S21, S22, S23 and
S24, Equations of The Second Kind switch K2 and current limiting device M2 compositions, current limiting device M2 are made up of inductance L21 and inductance L22；The like, limit
Stream unit Un switchs Sn1, Sn2, Sn3 and Sn4, Equations of The Second Kind switch Kn and current limiting device Mn by the first kind and constituted, current limiting device Mn
It is made up of inductance Ln1 and inductance Ln2.N=1,2 ... ..., n.
Described first kind switch S11, inductance L11 and first kind switch S12 is sequentially connected in series to form series arm, the first kind
Switch S13, inductance L12 and first kind switch S14 are sequentially connected in series to form series arm, and two series arms are connected in parallel on tie point A
Between B.Equations of The Second Kind switch K1 one end is connected to inductance L11 and the first kind switchs S12 tie point, Equations of The Second Kind switch K1's
The other end is connected on first kind switch S13 and inductance L12 tie point, constitutes current limiting unit U1；First kind switch S21, electricity
Sense L21 and first kind switch S22 are sequentially connected in series to form series arm, first kind switch S23, inductance L22 and first kind switch S24
It is sequentially connected in series to form series arm, two series arms are connected in parallel between tie point A and B.Equations of The Second Kind switch K2 one end connection
S22 tie point is switched in inductance L21 and the first kind, the Equations of The Second Kind switch K2 other end is connected to first kind switch S23 and electricity
On the tie point for feeling L22, current limiting unit U2 is constituted.The like, first kind switch Sn1, inductance Ln1 and first kind switch Sn2
It is sequentially connected in series to form series arm, first kind switch Sn3, inductance Ln2 and first kind switch Sn4 are sequentially connected in series to form series connection branch
Road, two series arms are connected in parallel between tie point A and B.Equations of The Second Kind switch Kn one end is connected to inductance Ln1 and the first kind is opened
Sn2 tie point is closed, the Equations of The Second Kind switch Kn other end is connected on first kind switch Sn3 and inductance Ln2 tie point, composition
Current limiting unit Un.3rd class switch W1 one end is connected to current limiting unit U1 inductance L12 and first kind switch S14 connection
Point, the 3rd class switch W1 other end is connected on current limiting unit U2 first kind switch S21 and inductance L21 tie point；The
Three classes switch Wn-1 one end is connected on current limiting unit Un first kind switch Sn1 and inductance Ln1 tie point.
Described current limiting device M1 inductance L11 and inductance L12, current limiting device M2 inductance L21 and inductance L22 ...,
And current limiting device Mn inductance Ln1 and inductance Ln2, or non-coupled inductance, or non-coupled superconduction inductance, or Same Name of Ends coupling
Close inductance, or Same Name of Ends Coupled Superconducting inductance, or different name end Coupled Superconducting inductance；N=1,2 ... ..., n.
Fig. 2 show the structure for the current limiting device being made up of Same Name of Ends coupling inductance or Same Name of Ends Coupled Superconducting inductance.Limit
Stream device Mn is made up of inductance Ln1 and inductance Ln2, and inductance Ln1 port 1 and inductance Ln2 port 3 are a pair of Same Name of Ends, electricity
It is a pair of Same Name of Ends to feel Ln1 port 2 and inductance Ln2 port 4.Inductance Ln1 is identical with the number of turn with inductance Ln2 structure, when
When electric current is flowed into from inductance Ln1 port 1 and inductance Ln2 port 3 respectively, inductance Ln1 and inductance Ln2 flow direction phase
Together；N=1,2 ... ..., n.
Fig. 3 show the structure chart for the current limiting device being made up of different name end Coupled Superconducting inductance.Current limiting device Mn is by inductance
Ln1 and inductance Ln2 compositions, inductance Ln1 port 1 and inductance Ln2 port 4 are a pair of Same Name of Ends, the inductance Ln1 He of port 2
Inductance Ln2 port 3 is a pair of Same Name of Ends, and inductance Ln1 is identical with the number of turn with inductance Ln2 structure, is superconducting coil, works as electricity
When stream is flowed into from inductance Ln1 port 1 and inductance Ln2 port 3 respectively, inductance Ln1 and inductance Ln2 flow direction on the contrary,
Magnetic flux is cancelled out each other；N=1,2 ... ..., n.
Described first kind switch or IGBT switching tube opposing series configurations, or IGBT switching tubes and Diode series
Structure.
Described Equations of The Second Kind switch or IGBT switching tube opposing series configurations, or IGBT switching tubes and Diode series
Structure, or Thyristors in series structure.
Described the 3rd class switch or IGBT switching tube opposing series configurations, or IGBT switching tubes and Diode series
Structure, or Thyristors in series structure.
Fig. 4 show IGBT switching tube opposing series configurations, IGBT switching tube G1 and G2 differential concatenations；
Fig. 5 show IGBT switching tubes and Diode series structure, IGBT switching tubes G1 and diode D1 forward direction series connection；
Fig. 6 show Thyristors in series structure, the equidirectional series connection of IGCT P1 and P2；
Described switch S11 and Sn4, or first kind switch, or wire is direct-connected to be replaced.
During Power System Steady-state, the present invention division reactance type direct current current-limiting circuit breaker in, the first kind switch S11, S12 ...,
S14, S21, S22 ..., S24 ..., Sn1, Sn2 ..., Sn4 be in conducting state, Equations of The Second Kind switch K1,
K2 ..., Kn be in off state, the 3rd class switch W1, W2 ..., Wn-1 be in off state, so as to form 2n
Individual current path, i.e. electric current switch S11, inductance L11 and the first kind switch S12 formation series arm by the first kind and led
Logical, electric current switchs S13, inductance L12 and the first kind switch S14 formation series arm by the first kind and turned on, and electric current passes through
First kind switch S21, inductance L21 and the first kind switch the series arm of S22 formation and turned on, and electric current is switched by the first kind
S23, inductance L22 and the first kind switch the series arm of S24 formation and turned on, the like, electric current is switched by the first kind
Sn1, inductance Ln1 and the first kind switch the series arm of Sn2 formation and turned on, and electric current passes through the first kind and switchs Sn3, inductance Ln2
The series arm of Sn4 formation is switched with the first kind and is turned on.Multiple current limiting unit U1, U2 ..., Un be in parallel connection,
Current limiting device M1 inductance L11 and L12, current limiting device M2 inductance L21 and L22 ..., current limiting device Mn inductance Ln1 and
Ln2 is equivalent to parallel connection, line current mean allocation in multiple current limiting units.By the realization of parallel-connection structure, reduce point
Reactance type direct current current-limiting circuit breaker steady-state operation loss is split, current limiter reliability of operation is improved.
Power network occur short trouble when, Equations of The Second Kind switch K1, K2 ..., Kn it is in the conduction state, the 3rd class switch W1,
W2 ..., Wn-1 it is in the conduction state, the first kind switch S12, S13, S14, S21, S22 ..., S24 ..., Sn1, Sn2,
Sn3 is off state, and first kind switch S11 and Sn4 is in the conduction state, and electric current passes sequentially through first kind switch S11, inductance
L11, Equations of The Second Kind switch K1, inductance L12, the 3rd class switch W1, inductance L21, Equations of The Second Kind switch K2, inductance L22 ..., the 3rd
Class switch Wn-1, inductance Ln1, Equations of The Second Kind switch Kn, inductance Ln2, first kind switch Sn4.Form inductance L11, L12, L21,
L22 ..., Ln1, Ln2 be sequentially connected in series, so as to produce larger current-limiting impedance.Switched by the first kind, Equations of The Second Kind switch and
3rd class switch realizes transformation of the inductance from parallel-connection structure to cascaded structure, so as to generate larger current-limiting resistance and current limliting
Inductance, effectively limits fault current, improves the current limiting capacity of current limiter.During current limliting, simultaneously turn off the first kind and open
Close S11 and Sn4, shut-off Equations of The Second Kind switch K1, K2 ..., Kn, shut-off the 3rd class switch W1, W2 ..., Wn-1, so as to realize
Cut-off short-circuit current during current limliting.
Described current limiting device M1 inductance L11 and inductance L12, current limiting device M2 inductance L21 and inductance L22 ...,
Current limiting device Mn inductance Ln1 and inductance Ln2 be non-coupled inductance, if inductance L11, L12, L21, L22 ..., Ln1, Ln2
Inductance value be L, then it is described division reactance type direct current current-limiting circuit breaker stable state and current limliting when inductance ZLFor：
ZL=2nL, n=1,2 ..., n
Described current limiting device M1 inductance L11 and inductance L12, current limiting device M2 inductance L21 and inductance L22 ...,
Current limiting device Mn inductance Ln1 and inductance Ln2 is non-Coupled Superconducting inductance, if inductance L11, L12, L21, L22 ...,
Ln1, Ln2 inductance value are L, and it is R to quench resistance, then when the division reactance type direct current current-limiting circuit breaker stable state and current limliting
Inductance ZLFor：
ZL=2nL, n=1,2 ..., n
Resistance Z when present invention division reactance type direct current current-limiting circuit breaker stable state and current limlitingRFor：
Wherein, Steasy-state represents stable state, and Fault-state represents failure current limit state.
Described current limiting device M1 inductance L11 and L12, current limiting device M2 inductance L21 and L22 ..., current limiting device
Mn inductance Ln1 and Ln2 be Same Name of Ends coupling inductance, if inductance L11, L12, L21, L22 ..., Ln1, Ln2 inductance value
Be L, inductance L11 and L12 mutual inductance, inductance L21 and L22 mutual inductance ..., inductance Ln1 and Ln2 mutual inductance be M, then institute
State the inductance Z when stable state and current limliting of division reactance type direct current current-limiting circuit breakerLFor：
ZL=2nL+nM, n=1,2 ..., n
Described current limiting device M1 inductance L11 and inductance L12, current limiting device M2 inductance L21 and inductance L22 ...,
Current limiting device Mn inductance Ln1 and inductance Ln2 be the superconducting-coupled inductance of Same Name of Ends, if inductance L11, L12, L21,
L22 ..., Ln1, Ln2 inductance value be L, inductance L11 and L12 mutual inductance, inductance L21 and inductance L22 mutual inductance ...,
Inductance Ln1 and inductance Ln2 mutual inductance are M, and it is R to quench resistance, then the limit of the division reactance type direct current current-limiting circuit breaker
Flow inductance ZLFor：
ZL=2nL+2nM, n=1,2 ..., n
The current-limiting resistance Z of present invention division reactance type direct current current-limiting circuit breakerRFor：
Wherein, when Steasy-state represents stable state, when Fault-state represents current limliting.
Described current limiting device M1 inductance L11 and inductance L12, current limiting device M2 inductance L21 and inductance L22 ...,
Current limiting device Mn inductance Ln1 and inductance Ln2 be the superconducting-coupled inductance in different name end, if inductance L11, L12, L21,
L22 ..., Ln1, Ln2 inductance value be L, inductance L11 and inductance L12 mutual inductance, inductance L21 and inductance L22 it is mutual
Sense ..., inductance Ln1 and inductance Ln2 mutual inductance be M, it is R to quench resistance, then the division reactance type direct current current-limiting breaks
The current-limiting inductance Z of road deviceLFor：
ZL=2nL-2nM, n=1,2 ..., n
Divide the current-limiting resistance Z of reactance type direct current current-limiting circuit breakerRFor：
Fig. 7 show embodiments of the invention 2, for the division reactance type direct current current-limiting open circuit for flexible direct current power network
Device.The division reactance type direct current current-limiting circuit breaker added on the basis of structure shown in Fig. 1 auxiliary current limiting device Z11, Z12,
Z21、Z22、……、Zn1、Zn.Wherein, current limiting unit U11 switchs S11, S12, S13 and S14, Equations of The Second Kind by the first kind and switched
K1, current limiting device M1, auxiliary current limiting device Z11 and Z12 composition；Current limiting unit U12 by the first kind switch S21, S22, S23 and
S24, Equations of The Second Kind switch K2, current limiting device M2, auxiliary current limiting device Z21 and Z22 composition.The like, current limiting unit U1n is by
One class switch Sn1, Sn2, Sn3 and Sn4, Equations of The Second Kind switch Kn, current limiting device Mn, auxiliary current limiting device Zn1 and Zn2 composition；N=
1,2 ... ..., n.
Described inductance L11 is in parallel with auxiliary current limiting device Z11, inductance L12 is in parallel with auxiliary current limiting device Z12, inductance
Current limiting device Z21 is in parallel, inductance L22 is in parallel with auxiliary current limiting device Z22 for L21 and auxiliary ..., inductance Ln1 and aid in current limliting
Device Zn1 is in parallel, inductance Ln2 is in parallel with auxiliary current limiting device Zn2.
Described auxiliary current limiting device Z11, Z12, Z21, Z22 ..., Zn1, Zn, or inductance, or resistance, or
The combination of inductance and resistance.
During Power System Steady-state, the operation principle of embodiment 2 is same as Example 1, electric current not by aid in current limiting device Z11,
Z12、Z21、Z22、……、Zn1、Zn。
Power network occur short trouble when, Equations of The Second Kind switch K1, K2 ..., Kn it is in the conduction state, the 3rd class switch W1,
W2 ..., Wn-1 it is in the conduction state, the first kind switch S12, S13, S14, S21, S22 ..., S24 ..., Sn1, Sn2,
Sn3 off states, first kind switch S11 and Sn4 is in the conduction state, and electric current passes sequentially through first kind switch S11, inductance L11
Shunt circuit, Equations of The Second Kind switch K1, inductance L12 and auxiliary current limiting device Z12 shunt circuit with auxiliary current limiting device Z11,
3rd class switch W1, inductance L21 and auxiliary current limiting device Z21 shunt circuit, Equations of The Second Kind switch K2, inductance L22 and auxiliary limit
Flow device Z22 shunt circuit ..., the 3rd class switch Wn-1, inductance Ln1 and auxiliary current limiting device Zn1 shunt circuit, the
Two classes switch Kn, inductance Ln2 and auxiliary current limiting device Zn2 shunt circuit, first kind switch Sn4.Electric current passes through shunt circuit
When, shunted automatically between inductance and auxiliary current limiting device, form inductance L11 and the Z11 parallel connections of auxiliary current limiting device are returned
Road, L12 and auxiliary current limiting device Z12 shunt circuits, inductance L21 and auxiliary current limiting device Z21 shunt circuits, L22 and auxiliary limit
Flow device Z22 shunt circuits ..., inductance Ln1 and auxiliary current limiting device Zn1 shunt circuits, Ln2 and auxiliary current limiting device Zn2
Shunt circuit be sequentially connected in series.By aiding in being incorporated to for current limiting device, the resistance to of division reactance type direct current current-limiting circuit breaker is improved
Rush of current ability.During current limliting, simultaneously turn off the first kind switch S11 and Sn4, shut-off Equations of The Second Kind switch K1,
K2 ..., Kn, shut-off the 3rd class switch W1, W2 ..., Wn-1, it is achieved thereby that cut-off during current limliting short trouble electricity
Stream.
Therefore, present invention division reactance type direct current current-limiting circuit breaker realizes current limiting device parallel running in stable state, subtracts
Small division reactance type direct current current-limiting circuit breaker running wastage, reduces its influence to power network；During failure current limit, lead to
Crossing first kind switch, Equations of The Second Kind switch and the 3rd class switch realizes transformation of the inductance from parallel-connection structure to cascaded structure, so that
Larger current-limiting resistance and inductance is generated, fault current is effectively limited, the current limiting capacity of current limiter is improved.
Claims (9)
1. one kind division reactance type direct current current-limiting circuit breaker, it is characterised in that described division reactance type direct current current-limiting circuit breaker
Including n current limiting unit U1, U2 ..., Un and n the 3rd classes switch W1, W2 ..., Wn-1, go here and there between two current limiting units
One the 3rd class switch of connection, n=1,2 ... ..., n.
2. according to the division reactance type direct current current-limiting circuit breaker described in claim 1, it is characterised in that current limiting unit U1 is by first
Class switch S11, S12, S13, S14, Equations of The Second Kind switch K1 and current limiting device M1 compositions, current limiting device M1 is by inductance L11 and inductance
L12 is constituted；Current limiting unit U2 switchs S21, S22, S23, S24, Equations of The Second Kind switch K2 and current limiting device M2 by the first kind and constituted, and limits
Stream device M2 is made up of inductance L21 and inductance L22；The like, current limiting unit Un by the first kind switch Sn1, Sn2, Sn3,
Sn4, Equations of The Second Kind switch Kn and current limiting device Mn compositions, current limiting device Mn are made up of inductance Ln1 and inductance Ln2；N=1,
2 ... ..., n；
In current limiting unit U1, described first kind switch S11, inductance L11 and first kind switch S12 is sequentially connected in series to form series connection branch
Road, first kind switch S13, inductance L12 and first kind switch S14 are sequentially connected in series to form series arm, two series arm parallel connections
Between tie point A and B；Equations of The Second Kind switch K1 one end is connected on inductance L11 and the first kind switch S12 tie point, the
The two classes switch K1 other end is connected on first kind switch S13 and inductance L12 tie point, constitutes current limiting unit U1；First
Class switch S21, inductance L21 and the first kind switch S22 be sequentially connected in series to form series arm, the first kind switch S23, inductance L22 and
First kind switch S24 is sequentially connected in series to form series arm, and two series arms are connected in parallel between tie point A and B, Equations of The Second Kind switch
K2 one end is connected on inductance L21 and the first kind switch S22 tie point, and the Equations of The Second Kind switch K2 other end is connected to first
On class switch S23 and inductance L22 tie point, current limiting unit U2 is constituted；The like, the first kind switch Sn1, inductance Ln1 and
First kind switch Sn2 is sequentially connected in series to form series arm, and first kind switch Sn3, inductance Ln2 and first kind switch Sn4 go here and there successively
Connection forms series arm, and two series arms are connected in parallel between tie point A and B, and Equations of The Second Kind switch Kn one end is connected to inductance
On Ln1 and the first kind switch Sn2 tie point, the Equations of The Second Kind switch Kn other end is connected to first kind switch Sn3 and inductance Ln2
Tie point on, constitute current limiting unit Un；3rd class switch W1 one end is connected to current limiting unit U1 inductance L12 and the first kind
S14 tie point is switched, the 3rd class switch W1 other end connection current limiting unit U2 first kind switch S21's and inductance L21
Tie point；On 3rd class switch Wn-1 one end connection current limiting unit Un first kind switch Sn1 and inductance Ln1 tie point.
3. according to the division reactance type direct current current-limiting circuit breaker described in claim 2, it is characterised in that described current limiting device M1
Inductance L11 and inductance L12, current limiting device M2 inductance L21 and inductance L22 ... and current limiting device Mn inductance Ln1 and
Inductance Ln2, or non-coupled inductance, or non-coupled superconduction inductance, or Same Name of Ends coupling inductance, or Same Name of Ends coupling are super
Conduction sense, or different name end Coupled Superconducting inductance；N=1,2 ... ..., n.
4. according to the division reactance type direct current current-limiting circuit breaker described in claim 3, it is characterised in that by Same Name of Ends coupling inductance
Or in the current limiting device Mn of Same Name of Ends Coupled Superconducting inductance composition, inductance Ln1 port 1 and inductance Ln2 port 3 are same a pair
Name end, inductance Ln1 port 2 and inductance Ln2 port 4 are a pair of Same Name of Ends；Inductance Ln1 and inductance Ln2 structure and the number of turn
It is identical, when electric current is flowed into from inductance Ln1 port 1 and inductance Ln2 port 3 respectively, inductance Ln1 and inductance Ln2 magnetic flux
Direction is identical；N=1,2 ... ..., n.
5. according to the division reactance type direct current current-limiting circuit breaker described in claim 3, it is characterised in that by different name end Coupled Superconducting
In the current limiting device Mn of inductance composition, inductance Ln1 port 1 and inductance Ln2 port 4 are a pair of Same Name of Ends, inductance Ln1 end
2 and inductance Ln2 of mouth port 3 is a pair of Same Name of Ends, and inductance Ln1 is identical with the number of turn with inductance Ln2 structure, is superconducting line
Circle, when electric current is flowed into from inductance Ln1 port 1 and inductance Ln2 port 3 respectively, inductance Ln1 and inductance Ln2 magnetic flux side
To on the contrary, magnetic flux is cancelled out each other；N=1,2 ... ..., n.
6. according to the division reactance type direct current current-limiting circuit breaker described in any one of claim 1-5, it is characterised in that power network is steady
During state, in described division reactance type direct current current-limiting circuit breaker, the first kind switch S11, S12 ..., S14, S21,
S22 ..., S24 ..., Sn1, Sn2 ..., Sn4 be in conducting state, Equations of The Second Kind switch K1, K2 ..., Kn locates
In off state, the 3rd class switch W1, W2 ..., Wn-1 be in off state, so as to form 2n current path, i.e.,
Electric current switchs S11, inductance L11 and the first kind switch S12 formation series arm by the first kind and turned on, and electric current passes through first
Class switch S13, inductance L12 and the first kind switch the series arm of S14 formation and turned on, and electric current passes through the first kind and switchs S21, electricity
Sense L21 and the first kind switch the series arm of S22 formation and turned on, and electric current passes through the first kind and switchs S23, inductance L22 and first
Class switchs the series arm of S24 formation and turned on, the like, electric current passes through the first kind and switchs Sn1, inductance Ln1 and the first kind
Switch the series arm of Sn2 formation and turn on, electric current switchs Sn3, inductance Ln2 by the first kind and first kind switch Sn4 is formed
Series arm and turn on；Multiple current limiting unit U1, U2 ..., Un be in parallel connection, current limiting device M1 inductance L11
With L12, current limiting device M2 inductance L21 and L22 ..., current limiting device Mn inductance Ln1 and Ln2 be equivalent to parallel connection, circuit
Electric current mean allocation in multiple current limiting units；
Power network occur short trouble when, Equations of The Second Kind switch K1, K2 ..., Kn it is in the conduction state, the 3rd class switch W1,
W2 ..., Wn-1 it is in the conduction state, the first kind switch S12, S13, S14, S21, S22 ..., S24 ..., Sn1, Sn2,
Sn3 is off state, and first kind switch S11 and Sn4 is in the conduction state, and electric current passes sequentially through first kind switch S11, inductance
L11, Equations of The Second Kind switch K1, inductance L12, the 3rd class switch W1, inductance L21, Equations of The Second Kind switch K2, inductance L22 ..., the 3rd
Class switch Wn-1, inductance Ln1, Equations of The Second Kind switch Kn, inductance Ln2, first kind switch Sn4.Form inductance L11, L12, L21,
L22 ..., Ln1, Ln2 be sequentially connected in series, so as to produce larger current-limiting impedance；Switched by the first kind, Equations of The Second Kind switch and
3rd class switch realizes transformation of the inductance from parallel-connection structure to cascaded structure, so as to generate larger current-limiting resistance and current limliting
Inductance, limits fault current, improves the current limiting capacity of current limiter；During current limliting, first kind switch S11 is simultaneously turned off
And Sn4, shut-off Equations of The Second Kind switch K1, K2 ..., Kn, shut-off the 3rd class switch W1, W2 ..., Wn-1, realize in current limliting mistake
Short-circuit current is cut-off in journey.
7. according to the division reactance type direct current current-limiting circuit breaker described in claim 1, it is characterised in that current limiting unit U11 is by
One class switch S11, S12, S13 and S14, Equations of The Second Kind switch K1, current limiting device M1, auxiliary current limiting device Z11 and Z12 composition；Limit
Flow unit U12 and S21, S22, S23 and S24, Equations of The Second Kind switch K2, current limiting device M2, auxiliary current limiting device Z21 are switched by the first kind
With Z22 compositions；The like, current limiting unit U1n switchs Sn1, Sn2, Sn3 and Sn4, Equations of The Second Kind by the first kind and switchs Kn, current limliting
Device Mn, auxiliary current limiting device Zn1 and Zn2 composition；Inductance L11 is in parallel with auxiliary current limiting device Z11, inductance L12 is limited with auxiliary
Stream device Z12 is in parallel, inductance L21 is in parallel with auxiliary current limiting device Z21, inductance L22 is in parallel with auxiliary current limiting device Z22 ...,
Inductance Ln1 is in parallel with auxiliary current limiting device Zn1, inductance Ln2 is in parallel with auxiliary current limiting device Zn2；N=1,2 ... ..., n；
Described auxiliary current limiting device Z11, Z12, Z21, Z22 ..., Zn1, Zn or inductance, or resistance, or inductance and
The combination of resistance.
8. according to the division reactance type direct current current-limiting circuit breaker described in claim 7, it is characterised in that during Power System Steady-state, electric current
Not by aid in current limiting device Z11, Z12, Z21, Z22 ..., Zn1, Zn；
Power network occur short trouble when, Equations of The Second Kind switch K1, K2 ..., Kn it is in the conduction state, the 3rd class switch W1,
W2 ..., Wn-1 it is in the conduction state, the first kind switch S12, S13, S14, S21, S22 ..., S24 ..., Sn1, Sn2,
Sn3 off states, first kind switch S11 and Sn4 is in the conduction state, and electric current passes sequentially through first kind switch S11, inductance L11
Shunt circuit, Equations of The Second Kind switch K1, inductance L12 and auxiliary current limiting device Z12 shunt circuit with auxiliary current limiting device Z11,
3rd class switch W1, inductance L21 and auxiliary current limiting device Z21 shunt circuit, Equations of The Second Kind switch K2, inductance L22 and auxiliary limit
Flow device Z22 shunt circuit ..., the 3rd class switch Wn-1, inductance Ln1 and auxiliary current limiting device Zn1 shunt circuit, the
Two classes switch Kn, inductance Ln2 and auxiliary current limiting device Zn2 shunt circuit, first kind switch Sn4；Electric current passes through shunt circuit
When, shunted automatically between inductance and auxiliary current limiting device, form inductance L11 and auxiliary current limiting device Z11 shunt circuits,
L12 and auxiliary current limiting device Z12 shunt circuits, inductance L21 and auxiliary current limiting device Z21 shunt circuits, L22 and auxiliary current limiter
Part Z22 shunt circuits ..., inductance Ln1 and auxiliary current limiting device Zn1 shunt circuits, Ln2 and auxiliary current limiting device Zn2 it is in parallel
Loop is sequentially connected in series, so as to produce larger current-limiting impedance；During current limliting, simultaneously turn off the first kind switch S11 and
Sn4, shut-off Equations of The Second Kind switch K1, K2 ..., Kn, shut-off the 3rd class switch W1, W2 ..., Wn-1, realize in current limliting process
In cut-off short-circuit current.
9. according to the division reactance type direct current current-limiting circuit breaker described in claim 1 or 2 or 6 or 7 or 8, it is characterised in that described
First kind switch or IGBT switching tube opposing series configurations, or IGBT switching tubes and Diode series structure；Described
Equations of The Second Kind is switched or IGBT switching tube opposing series configurations, or IGBT switching tubes and Diode series structure, or brilliant lock
Pipe cascaded structure；Described the 3rd class switch or IGBT switching tube opposing series configurations, or IGBT switching tubes and diode
Cascaded structure, or Thyristors in series structure.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110867839A (en) * | 2019-12-02 | 2020-03-06 | 广州供电局有限公司 | Overvoltage suppression circuit |
| CN112491023A (en) * | 2020-11-11 | 2021-03-12 | 广东电网有限责任公司 | Superconducting direct current limiter |
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| CN101183781A (en) * | 2007-12-10 | 2008-05-21 | 华中科技大学 | Shunt inductance current-limiting breaker |
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| JPH0564307A (en) * | 1991-08-30 | 1993-03-12 | Toyo Electric Mfg Co Ltd | Controller for electric vehicle |
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| CN112491023A (en) * | 2020-11-11 | 2021-03-12 | 广东电网有限责任公司 | Superconducting direct current limiter |
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| CN107104423B (en) | 2018-12-04 |
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