CN104242256B - The regioselectivity chained approach of breaker, device and system - Google Patents

The regioselectivity chained approach of breaker, device and system Download PDF

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Publication number
CN104242256B
CN104242256B CN201310224683.4A CN201310224683A CN104242256B CN 104242256 B CN104242256 B CN 104242256B CN 201310224683 A CN201310224683 A CN 201310224683A CN 104242256 B CN104242256 B CN 104242256B
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time
breaker
zsi
fault
kink
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CN104242256A (en
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杜峰
马里奥·丹克特
陈维刚
卓越
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Siemens AG
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Siemens AG
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Priority to CN201310224683.4A priority Critical patent/CN104242256B/en
Priority to DE102014210904.3A priority patent/DE102014210904B4/en
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    • 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
    • H02H3/093—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 with timing means
    • 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
    • H02H7/30—Staggered disconnection

Abstract

Embodiment of the present invention discloses a kind of regioselectivity chained approach of breaker, device and system.Method includes：Fault current threshold value is set；When the fault curre that non-final stage breaker judges to detect is not less than the fault current threshold value, sex-kink time t is selected based on the fault curre zoning detectedzsiAnd/or stand-by protection time tsd, wherein regional choice sex-kink time tzsiReduced, stand-by protection time t with fault curre increase is detectedsdReduced with fault curre increase is detected；Judge the non-final stage breaker in regional choice sex-kink time tzsiThe regional choice sex-kink input signal from next stage breaker inside whether is received, if it is, in stand-by protection time tsdSuch as failure is still present after arrival, the non-final stage circuit breaker tripping；If it is not, the non-final stage breaker is in regional choice sex-kink time tzsiThreaded off after arrival.Embodiments of the present invention reduce the harmful effect of fuel factor and galvanomagnetic-effect to system neutral road, cable and breaker.

Description

The regioselectivity chained approach of breaker, device and system
Technical field
The present invention relates to distribution technique field, more particularly to field of circuit breakers.
Background technology
Selective protection is a basic demand of power supply-distribution system relay protection.The concrete meaning of selective protection refers to During system jam, faulty component can be cut off from system in minimum zone, so as to ensure non-faulting to greatest extent Continue to power in part.Can be preferably using regional choice sex-kink (ZSI, Zone-Selective Interlocking) technology Selective matching problem between solution secondary network level.ZSI refers to a kind of practicality technology for realizing protection zone selectivity, its Function is on the premise of selective incubation between ensureing the superior and the subordinate, realizes that protection with shortest time limit cut-away area internal fault, that is, exists When being broken down in subordinate protection zone, rapid excision failure is protected by subordinate, while locking higher level protects, selected with realizing between level The cooperation of selecting property.In traditional ZSI technologies, if forbidding current protection, when higher level's breaker detects failure, it postpones The regional choice sex-kink time（tzsi）To wait the ZSI signals of subordinate's breaker.When higher level's breaker receives ZSI signals, on The level breaker delay stand-by protection time（tsd）（That is higher level's breaker is in tsdTrip action is not performed in time）If tsdWhen Between after failure still exist, then higher level's circuit breaker tripping, realize the function of stand-by protection.When higher level's breaker does not receive ZSI Signal, higher level's breaker is in tzsiThreaded off after time.In this technology, tzsiAnd tsdAll it is regular time value.In failure Electric current is larger（Such as the decades of times of rated current）In the case of, tzsiAnd tsdTime internal heat effect and galvanomagnetic-effect are in system Circuit harmful effect caused by cable will be very big, the service life of breaker necessarily can also be affected.
The content of the invention
Embodiment of the present invention proposes a kind of regioselectivity chained approach of breaker, to reduce the bad of fault current Influence.
Embodiment of the present invention proposes a kind of breaker, to reduce the harmful effect of fault current.
Embodiment of the present invention proposes a kind of circuit breaker system, to reduce the harmful effect of fault current.
The technical scheme of embodiment of the present invention is as follows：
A kind of regioselectivity chained approach of breaker, including：
Fault current threshold value is set；
When the fault curre that non-final stage breaker judges to detect is not less than the fault current threshold value, based on inspection Fault curre zoning selection sex-kink time t measuredzsiAnd/or stand-by protection time tsd, wherein regioselectivity connect Lock time tzsiReduced, stand-by protection time t as the fault curre detected increasessdWith the fault current detected Value increases and reduced；
Judge the non-final stage breaker in the regional choice sex-kink time tzsiInside whether receive and break from next stage The regional choice sex-kink input signal of road device, if it is, working as stand-by protection time tsdSuch as failure is still present after arrival, The non-final stage circuit breaker tripping；If it is not, then the non-final stage breaker is in the regional choice sex-kink time tzsiArrive Threaded off after reaching.
It is described that sex-kink time t is selected based on the fault curre zoning detectedzsiAnd/or the stand-by protection time tsdIncluding：
Directly utilize fault curre zoning selection sex-kink time tzsiAnd/or stand-by protection time tsd；
Sex-kink time t is selected using the rate of change zoning of fault currezsiAnd/or stand-by protection time tsd；
Utilize the energy balane regional choice sex-kink time t of fault currezsiAnd/or stand-by protection time tsd；Or
Using in the energy of fault curre, the rate of change of fault curre and fault curre these three parameters at least Two zonings select sex-kink time tzsiAnd/or stand-by protection time tsd。
It is described that sex-kink time t is selected based on the fault curre zoning detectedzsiIncluding：
Zoning selects sex-kink time tzsi, wherein tzsiWith fault current threshold value direct proportionality, and tzsi With the inversely proportional relation of fault curre detected,;Wherein A is pre-determined factor；ISDFor failure electricity Flow threshold value；IfaultFor the fault curre detected；tmecFor the mechanical trip time, the mechanical trip time is that breaker is held Time needed for row trip action.It is described that stand-by protection time t is calculated based on the fault curre detectedsdIncluding：
Calculate the stand-by protection time of n-th grade of breaker
WhereinWith fault current threshold value direct proportionality,For the region choosing of (n-1)th grade of breaker Select sex-kink time, tmecFor the mechanical trip time；tpFor predetermined time value.
A kind of breaker, including fault current threshold value setting unit, time calculating unit and trip unit, wherein：
Fault current threshold value setting unit, for setting fault current threshold value；
Time calculating unit, when the fault curre for being detected when judgement is not less than the fault current threshold value, base Sex-kink time t is selected in the fault curre zoning detectedzsiAnd/or stand-by protection time tsd, wherein regional choice Sex-kink time tzsiReduced, stand-by protection time t as the fault curre detected increasessdWith the failure detected Current value increases and reduced；
Trip unit, for judging in the regional choice sex-kink time tzsiInside whether receive from next stage open circuit The regional choice sex-kink input signal of device, if it is, in stand-by protection time tsdAfter arrival if failure is still present Thread off；If it is not, then in the regional choice sex-kink time tzsiThreaded off after arrival.
Time calculating unit, for directly utilizing fault curre zoning selection sex-kink time tzsiIt is and/or standby Guard time tsd；
Sex-kink time t is selected using the rate of change zoning of fault currezsiAnd/or stand-by protection time tsd；
Utilize the energy balane regional choice sex-kink time t of fault currezsiAnd/or stand-by protection time tsd；Or
Using in the energy of fault curre, the rate of change of fault curre and fault curre these three parameters at least Two zonings select sex-kink time tzsiAnd/or stand-by protection time tsd。
Time calculating unit, sex-kink time t is selected for zoningzsi, wherein tzsiWith fault current threshold value into Proportional relationship, and tzsiWith the inversely proportional relation of fault curre detected,;Wherein A is Pre-determined factor；IsdFor fault current threshold value；IfaultFor the fault curre detected；tmecFor the mechanical trip time.
Time calculating unit, for calculating stand-by protection time t based on the fault curre detectedsdIncluding：
Calculate the stand-by protection time of the n-th rank breaker
WhereinWith fault current threshold value direct proportionality,For the region choosing of (n-1)th grade of breaker Select sex-kink time, tmecFor the mechanical trip time；tpFor predetermined time value.
A kind of circuit breaker system, including the first breaker and the second breaker, wherein the second breaker is positioned at the first open circuit The subordinate of device；
First breaker, for setting fault current threshold value, when the fault curre for judging to detect is not less than the event When hindering current threshold, sex-kink time t is selected based on the fault curre zoning detectedzsiAnd/or during stand-by protection Between tsd, wherein regional choice sex-kink time tzsiReduced, the stand-by protection time as the fault curre detected increases tsdReduced as the fault curre detected increases；And judge in the regional choice sex-kink time tzsiInside whether receive To the regioselectivity interlocking signal from the second breaker, if it is, in stand-by protection time tsdSuch as failure after arrival Still exist and then thread off；If it is not, then in the regional choice sex-kink time tzsiThreaded off after arrival；
Second breaker, for when detecting short trouble to the first breaker sending zone selectivity interlocking signal.
First breaker, for directly utilizing fault curre zoning selection sex-kink time tzsiAnd/or standby guarantor Protect time tsd；
Sex-kink time t is selected using the rate of change zoning of fault currezsiAnd/or stand-by protection time tsd；
Utilize the energy balane regional choice sex-kink time t of fault currezsiAnd/or stand-by protection time tsd；Or
Using in the energy of fault curre, the rate of change of fault curre and fault curre these three parameters at least Two zonings select sex-kink time tzsiAnd/or stand-by protection time tsd。
A kind of machine readable storage medium, store for making machine perform the instruction according to above-mentioned any one method.
A kind of computer program, perform the machine when the computer program is run in machine above-mentioned any one The method of item.
In embodiments of the present invention, fault current threshold value is set；When the event that the judgement of non-final stage breaker detects When barrier current value is not less than the fault current threshold value, the sex-kink time is selected based on the fault curre zoning detected tzsiAnd/or stand-by protection time tsd, wherein regional choice sex-kink time tzsiWith the fault curre increase detected Reduce, stand-by protection time tsdReduced as the fault curre detected increases；Judge the non-final stage breaker in institute State regional choice sex-kink time tzsiThe regional choice sex-kink input signal from next stage breaker inside whether is received, such as Fruit is, in stand-by protection time tsdAfter arrival as failure still exist if first circuit breaker tripping；If it is not, then should Non-final stage breaker is in the regional choice sex-kink time tzsiThreaded off after arrival.
Therefore using embodiments of the present invention after, tzsiAnd tsdNo longer it is fixed value, embodiment of the present invention By selecting sex-kink time t based on the fault curre adjustment region detectedzsiWith stand-by protection time tsdSize, drop Low fuel factor and galvanomagnetic-effect influence to caused by system neutral road/cable and breaker.
Brief description of the drawings
Fig. 1 is the regioselectivity chained approach of embodiment of the present invention breaker.
Fig. 2 is the breaker structure schematic diagram of embodiment of the present invention.
Fig. 3 is the circuit breaker system structure chart of embodiment of the present invention.
Fig. 4 is the regioselectivity locking system structure chart of embodiment of the present invention.
Fig. 5 is the workflow schematic diagram of Fig. 4 system breaks road device.
Embodiment
In order that technical scheme and advantage are more clearly understood, below in conjunction with drawings and the embodiments, to this Invention is further elaborated.It should be appreciated that embodiment described herein only illustrates this to illustrative Invention, the protection domain being not intended to limit the present invention.
Embodiment of the present invention proposes a kind of regioselectivity chained approach of breaker.
Fig. 1 is the regioselectivity chained approach of embodiment of the present invention breaker.
As shown in figure 1, this method includes：
Step 101：Fault current threshold value is set.
In embodiments of the present invention, fault current threshold value can be set first against breakers at different levels.Fault current Threshold value can be related to the rated current of every grade of breaker, such as the prearranged multiple for rated current.
Fault current can include diversified forms, for example can be short circuit current or leakage current etc..For example, in a reality Apply in mode, when short trouble occurs, fault current threshold value can be 10,12,15 or 20 times of breaker rated current, Etc..In one embodiment, when leak current fault occurs, fault current threshold value can be breaker rated current 0.1st, 0.2,0.3,0.4 or 0.5 times, etc..
It will be appreciated by those of skill in the art that although some specific numerals are listed to describe fault current thresholding above Multiple proportion between value and rated current, but this description is only exemplary, is not used to embodiment of the present invention Protection domain be defined.
Step 102：When the fault curre that non-final stage breaker judges to detect is not less than the fault current threshold value When, sex-kink time t is selected based on the fault curre zoning detectedzsiAnd/or stand-by protection time tsd, wherein area The chain time t of field selectivityzsiReduced, stand-by protection time t as the fault curre detected increasessdWith detecting Fault curre increase and reduce.
Herein, the regional choice sex-kink time t of the non-final stage breakerzsiWith stand-by protection time tsdStart at Point can be this at the time of most rear class breaker detects fault current.
In one embodiment, sex-kink time t is selected based on the fault curre zoning detectedzsiAnd/or Stand-by protection time tsdIt can specifically include：
（1）, directly using fault curre zoning selection sex-kink time tzsiAnd/or stand-by protection time tsd。
For example t can be setzsiWith fault current threshold value direct proportionality, and tzsiWith the failure electricity detected The inversely proportional relation of flow valuve,;Wherein A is pre-determined factor；IsdFor fault current threshold value；IfaultFor The fault curre detected；tmecFor the mechanical trip time.
Moreover, it is also possible to the stand-by protection time of n-th grade of breaker is calculated based on the fault curre detected Wherein：
With fault current threshold value direct proportionality,For the regioselectivity of (n-1)th grade of breaker Chain time, tmecFor the mechanical trip time（I.e. breaker performs the time needed for trip action）；tpFor predetermined time value.
It can be calculated by various waysFor example (n-1)th grade of breaker can be directed to, utilize formulaIt is calculatedDue toReduce, therefore count with the increase of fault current DrawAlso it is natural to be reduced with the increase of fault current.
（2）, utilize fault curre rate of change zoning selection sex-kink time tzsiAnd/or the stand-by protection time tsd。
For example t can be setzsiWith fault current threshold value direct proportionality, and tzsiWith the failure electricity detected The inversely proportional relation of rate of change of flow valuve.
（3）, utilize the energy balane regional choice sex-kink time t of fault currezsiAnd/or stand-by protection time tsd。
For example t can be setzsiWith fault current threshold value direct proportionality, and tzsiWith the failure electricity detected The inversely proportional relation of energy of flow valuve.
（4）, using in the energy of fault curre, the rate of change of fault curre and fault curre these three parameters At least two zonings select sex-kink time tzsiAnd/or stand-by protection time tsd。
For example t can be setzsiWith fault current threshold value direct proportionality, and tzsiWith fault curre, failure At least two inversely proportional relations in the rate of change of current value and the energy of fault curre these three parameters.Specifically, may be used Think these three parameters of the energy of fault curre, the rate of change of fault curre and fault curre set respectively weight because Son, and sex-kink time t is selected by weighting algorithm zoningzsiAnd/or stand-by protection time tsd。
Such as：
tzsi=f(Ifault(t),Ifault'(t),I2t)；tsd=f1(Ifault(t),Ifault'(t),I2t)；Wherein Ifault(t) For fault current function, Ifault' (t) be fault curre rate of change function；I2T is the energy function of fault curre.Function f （x）And f1（x）There can be a variety of forms of implementation.
It will be appreciated by those of skill in the art that although some specific functions are listed above how to describe based on detection Fault curre zoning selection sex-kink time t arrivedzsiAnd/or stand-by protection time tsd, but this description is only shown Plasticity, it is not used to be defined the protection domain of embodiment of the present invention.
Step 103：Judge the non-final stage breaker in the regional choice sex-kink time tzsiInside whether receive and come from The regional choice sex-kink input signal of next stage breaker, if it is, in stand-by protection time tsdSuch as failure after arrival Still exist, the non-final stage circuit breaker tripping；If it is not, then the non-final stage breaker is in the regional choice sex-kink Time tzsiThreaded off after arrival.
Breaking implement body can be realized by electrical apparatus release and threaded off.Electrical apparatus release is connected with breaker mechanical（Or composition Overall）, to release holding mechanism and the device that makes breaker disconnect automatically.Electrical apparatus release can include magnetictrip, heat The species such as magnetic release and electronic trip unit.Specifically, magnetictrip only provides magnetic protection, that is, short-circuit protection, works as electricity Flow sufficiently large caused magnetic field force and overcome reaction spring adhesive armature strike draw bar so as to lead agency action cut-out circuit. Pyromagnetic release provides magnetic protection and Thermal protection, Thermal protection i.e. overload protection.In general, thermo magnetic trip release is all used in circuit Device provides short circuit and overload protection, and only some special occasions provide short-circuit protection with magnetictrip, and by other elements （Such as electrothermal relay）To provide overload protection.Electronic trip unit can have all of above function, and can easily be adjusted. Electronic trip unit is exactly the circuit formed with electronic component, detects main circuit current, amplification, promotes tripping mechanism.
As can be seen here, when higher fault current in circuit breaker system be present, embodiment of the present invention is by reducing area The chain time t of field selectivityzsiWith stand-by protection time tsd, reduce fuel factor and galvanomagnetic-effect to system neutral road/cable and Harmful effect caused by breaker.
Based on above-mentioned labor, embodiment of the present invention also proposed a kind of breaker.
Fig. 2 is the breaker structure schematic diagram of embodiment of the present invention.
As shown in Fig. 2 the breaker includes fault current threshold value setting unit 201, time calculating unit 202 and threaded off Unit 203, wherein：
Fault current threshold value setting unit 201 is used to set fault current threshold value；
Time calculating unit 202 is used for when the fault curre for judging to detect is not less than the fault current threshold value, Sex-kink time t is selected based on the fault curre zoning detectedzsiAnd/or stand-by protection time tsd, wherein region is selected Select sex-kink time tzsiReduced, stand-by protection time t as the fault curre detected increasessdWith the event detected Barrier current value increases and reduced；
Trip unit 203 is used to judge in the regional choice sex-kink time tzsiInside whether receive and break from next stage The regional choice sex-kink input signal of road device, if it is, in stand-by protection time tsdSuch as failure is still present after arrival, Then thread off；If it is not, then in the regional choice sex-kink time tzsiThreaded off after arrival.
It is obvious that the upper of fault current threshold value setting unit 201 and time calculating unit 202 can be realized by program State function.It is also possible to use hardware realizes the above-mentioned function of the two.In one embodiment：Fault current threshold value Setting unit 201 is specifically as follows comparator or various memories, for preserving fault current threshold value.Time calculating unit 202 are specifically as follows microcontroller（MCU）.The MCU can be by the fault curre detected with being stored in comparator or storage Fault current threshold value in device is compared, and zoning selection sex-kink time tzsiAnd/or the stand-by protection time tsd。
The control unit that trip unit 203 can include electrical apparatus release and control trip unit 203 to act..Trip unit from MCU receives regional choice sex-kink time tzsiAnd/or stand-by protection time tsd, and perform specific take off using electrical apparatus release Button operation.
In one embodiment：
Time calculating unit 202, for directly utilizing fault curre zoning selection sex-kink time tzsiAnd/or Stand-by protection time tsd；
Sex-kink time t is selected using the rate of change zoning of fault currezsiAnd/or stand-by protection time tsd；
Utilize the energy balane regional choice sex-kink time t of fault currezsiAnd/or stand-by protection time tsd；Or
Using in the energy of fault curre, the rate of change of fault curre and fault curre these three parameters at least Two zonings select sex-kink time tzsiAnd/or stand-by protection time tsd。
In one embodiment：
Time calculating unit 202, sex-kink time t is selected for zoningzsi, wherein tzsiWith fault current threshold value Direct proportionality, and tzsiWith the inversely proportional relation of fault curre detected,;Wherein A For pre-determined factor；ISDFor fault current threshold value；IfaultFor the fault curre detected；tmecFor the mechanical trip time.
In one embodiment：
Time calculating unit 202, for calculating stand-by protection time t based on the fault curre detectedsdIncluding：
Calculate the stand-by protection time of the n-th rank breaker
WhereinWith fault current threshold value direct proportionality,For the region of the (n-1)th rank breaker Select sex-kink time, tmecFor the mechanical trip time；tpFor predetermined time value.
The breaker of embodiment of the present invention can be specifically embodied as polytype.Such as by mode of operation point, Ke Yishi Shi Wei：Electric operating, stored energy operation and manually operated, etc.；By structure point, may be implemented as universal and plastic shell.By making With classification point, may be implemented as：Selection type and non-selection type；By arc-extinguishing medium point, may be implemented as：Oil immersed type, sulfur hexafluoride, Vacuum type and air type, etc.；By responsiveness point, may be implemented as：Quick-type and plain edition；By series point, it is possible to implement For：Single-stage, two level, three-level and level Four etc.；By mounting means point, may be implemented as：Plug-in type, fixed and drawer type etc..
More specifically, the breaker of embodiment of the present invention may be embodied as omnipotent breaker（ACB, air circuit breaker）Or mold cased circuit breaker（MCCB, molded case circuit breaker）.MCCB breakers can be located at ACB subordinate, with each several part further protected and isolate distribution system.MCCB breakers can have a variety of active volumes, And generally with multilayer or multistage setting, and multiple MCCB are provided with each layer.
Based on above-mentioned labor, embodiment of the present invention also proposed a kind of circuit breaker system.
Fig. 3 is according to embodiment of the present invention circuit breaker system structure chart.Circuit breaker system can be arranged on power distribution system In system.
As shown in figure 3, the system includes power supply, the first breaker and the second breaker and load, wherein the second breaker Positioned at the subordinate of the first breaker.The circuit being connected with breaker is referred to as protected circuit.
First breaker 301, for setting fault current threshold value, it is somebody's turn to do when the fault curre for judging to detect is not less than During fault current threshold value, sex-kink time t is selected based on the fault curre zoning detectedzsiAnd/or stand-by protection Time tsd, wherein regional choice sex-kink time tzsiReduced, the stand-by protection time as the fault curre detected increases tsdReduced as the fault curre detected increases；And judge in the regional choice sex-kink time tzsiInside whether receive To the regioselectivity interlocking signal from the second breaker, if it is, in stand-by protection time tsdSuch as failure after arrival Still exist and then thread off；If it is not, then in the regional choice sex-kink time tzsiThreaded off after arrival；
Second breaker 302, for selecting sex-kink to the sending zone of the first breaker 301 when detecting short trouble Signal.
When the second breaker 302 is most rear class breaker, due to without subordinate's breaker, therefore its tzsiIt is zero.When When second breaker 302 is not most rear class breaker, the mode that can be similar to the first breaker 301 calculates second breaker 302 tzsiAnd tsd。
In one embodiment：
First breaker 301, for directly utilizing fault curre zoning selection sex-kink time tzsiIt is and/or standby With guard time tsd；
Sex-kink time t is selected using the rate of change zoning of fault currezsiAnd/or stand-by protection time tsd；
Utilize the energy balane regional choice sex-kink time t of fault currezsiAnd/or stand-by protection time tsd；Or
Using in the energy of fault curre, the rate of change of fault curre and fault curre these three parameters at least Two zonings select sex-kink time tzsiAnd/or stand-by protection time tsd。
In one embodiment：
First breaker 301, with the calculating chain time t of regioselectivityzsi, wherein tzsiWith fault current threshold value into just Proportionate relationship, and tzsiWith the inversely proportional relation of fault curre detected,;Wherein A is pre- Determine coefficient；ISDFor fault current threshold value；IfaultFor the fault curre detected；tmecFor the mechanical trip time.
In one embodiment：First breaker 301, for calculating the stand-by protection time of the n-th rank breaker
WhereinWith fault current threshold value direct proportionality,For（n-1）The area of rank breaker Field selectivity chain time, tmecFor the mechanical trip time；tpFor predetermined time value.
In circuit breaker system proposed by the invention, the I protections of non-final stage breaker can be enabled or prohibited Only.When the I protections of enabled non-final stage breaker, for the faulty current threshold of I protection settings, if non-final stage is broken The fault curre that road device judges to detect is more than the fault current threshold value set by for I protections, then the non-final stage Breaker performs the existing operation related to I protections.
In circuit breaker system proposed by the invention, when the I protections of non-final stage breaker are prohibited, only judging When the fault curre detected is not less than the fault current threshold value that embodiment of the present invention is proposed, non-final stage open circuit The regioselectivity chain function of device is just effective.Moreover, when the fault curre detected reaches the fault current threshold value, Regional choice sex-kink time tzsiAnd/or stand-by protection time tsdAll will be dynamic.
Table 1 is the regional choice sex-kink time t of 6 grades of circuit breaker systemszsiWith stand-by protection time tsdExemplary values Table.
According to the order from higher level to subordinate, breaker is respectively Q11, Q21, Q31, Q41 and Q51, and wherein Q51 is last Level breaker.The fault current threshold value of each rank breaker could be arranged to predetermined times of the rank breaker rated current Number.Such as, it is assumed that fault current IfaultFor 30KA, tmecFor 35ms, it is assumed that tzsiMaximum be 50ms, then even at non- Often during high circuital current, tzsiDynamic range also between 35ms to 50ms.Moreover, Q51 tsdFor 0；Q41 tsdFor Q51 tzsi, the mechanical trip time（Such as 35ms）And allowable error（15ms）Sum, equal to 89ms.
The parameter difference of each rank breaker is as follows：
Table 1
In table 1, tzsiWith tsdIt is all related to fault current, when fault current changes, tzsiWith tsdValue It can change.
Based on above-mentioned labor, the specific embodiment of the present invention is described again below.
Fig. 4 is the regioselectivity locking system structure chart of embodiment of the present invention.
As shown in figure 4, the system includes power supply 401, breaker 402, breaker 403 and breaker 404, each open circuit There is the connection of regioselectivity interlock protection between device.Breaker 402 is directly connected with power supply 401, positioned at most higher level；Breaker 403 positioned at the higher level of breaker 404 and the subordinate of breaker 402.
The fault current threshold value of this grade can be set in breaker 403.When short circuit condition occurs in system, if The fault curre that breaker 403 judges to detect is not less than the fault current threshold value, and breaker 403 is based on the event detected Barrier current value calculates the regional choice sex-kink time t of itselfzsiAnd/or stand-by protection time tsd, wherein regional choice sex-kink Time tzsiReduced, stand-by protection time t as the fault curre detected increasessdWith the fault curre detected Increase and reduce.Breaker 403 is also judged in the regional choice sex-kink time t calculatedzsiInside whether receive from breaker 404 regional choice sex-kink input signal, if it is, in the stand-by protection time t calculatedsdAs failure is still deposited after arrival Breaker 403 is threaded off；If it is not, then breaker 403 is in the regional choice sex-kink time t calculatedzsiTaken off after arrival Button.
Fig. 5 is the workflow schematic diagram of Fig. 4 system breaks road device 403.
As shown in figure 5, this method includes：
Step 501：When a failure occurs it, breaker 403 sends ZSI signals to the breaker 402 positioned at higher level.
Step 502：Whether the fault curre that breaker 403 judges to detect is not less than the fault current door pre-set Limit value, if it is calculation procedure 503 and its subsequent step, otherwise return and perform step 502.
Step 503：Breaker 403 selects sex-kink time t based on the fault curre zoning detectedzsiAnd/or Stand-by protection time tsd, wherein regional choice sex-kink time tzsiReduced as the fault curre detected increases, it is standby Guard time tsdReduced as the fault curre detected increases.Regional choice sex-kink time tzsiAnd/or stand-by protection Time tsdCircular see explanation above, no longer repeat here.
Step 504：Breaker 403 judges whether in regional choice sex-kink time tzsiWithin receive by positioned at subordinate The ZSI signals that breaker 404 is sent, step 505 and its subsequent step are if it is performed, if not then execution step 506 And its subsequent step.
Step 505：Breaker 403 judges stand-by protection time tsdWhether be over, if it is perform step 507 and Its subsequent step, otherwise return and perform step 502.
Step 506：Breaker 403 judges regional choice sex-kink time tzsiWhether it is over, if it is performs step Rapid 508, otherwise return and perform step 502.
Step 507：Whether failure judgement is still present, and if it is performs step 508, otherwise returns and performs step 502.
Step 508：Breaker 403 is threaded off.
It can be connected by diversified forms the regioselectivity for the breaker that embodiment of the present invention is proposed is embodied Locking method.For example the application programming interfaces of certain specification can be followed, the regioselectivity chained approach of breaker is written as The plug-in card program being installed in various computing devices, it can also be encapsulated as application program so that user voluntarily downloads use. When being written as plug-in card program, a variety of card formats such as ocx, dll, cab can be implemented as.It can also be inserted by Flash The particular techniques such as part, RealPlayer plug-in units, MMS plug-in units, MIDI staffs plug-in unit, ActiveX plug-in units are of the invention real to implement The regioselectivity chained approach for the breaker that the mode of applying is proposed.
Embodiment of the present invention can be proposed to the region of breaker by the storing mode that instruction or instruction set store Selective chained approach is stored in various storage mediums.These storage mediums include but is not limited to：Floppy disk, CD, DVD, hard disk, flash memory, USB flash disk, CF cards, SD card, mmc card, SM cards, memory stick（Memory Stick）, xD cards etc..
It is based on furthermore it is also possible to which embodiment of the present invention is proposed into the regioselectivity chained approach of breaker is applied to Flash memory（Nand flash）Storage medium in, such as USB flash disk, CF cards, SD card, SDHC cards, mmc card, SM cards, memory stick, xD cards Deng.
In summary, in embodiments of the present invention, fault current threshold value is set；When non-final stage breaker judges to examine When the fault curre measured is not less than the fault current threshold value, based on the fault curre zoning selectivity detected Chain time tzsiAnd/or stand-by protection time tsd, wherein regional choice sex-kink time tzsiWith the fault current detected Value increases and reduced, stand-by protection time tsdReduced as the fault curre detected increases；Judge that the non-final stage is broken Road device is in the regional choice sex-kink time tzsiInside whether receive the regional choice sex-kink input from next stage breaker Signal, if it is, in stand-by protection time tsdSuch as failure is still present after arrival, the non-final stage circuit breaker tripping； If it is not, then the non-final stage breaker is in the regional choice sex-kink time tzsiThreaded off after arrival.As can be seen here, should After embodiment of the present invention, tzsiAnd tsdNo longer it is fixed value, when high fault current in circuit breaker system be present, this hair Bright embodiment is by reducing regional choice sex-kink time tzsiWith stand-by protection time tsd, reduce fuel factor and electromagnetism effect Influence caused by tackling system neutral road/cable.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.It is all Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements made etc., the protection of the present invention should be included in Within the scope of.

Claims (9)

  1. A kind of 1. regioselectivity chained approach of breaker, it is characterised in that including：
    For breakers at different levels, fault current threshold value is set；
    When non-final stage breaker judges that the fault curre that detects is not less than the fault current threshold value, based on detecting Fault curre calculate a regional choice sex-kink time tzsiWith a stand-by protection time tsd, wherein the region Select sex-kink time tzsiReduced, stand-by protection time t as the fault curre detected increasessdWith detection The fault curre arrived increases and reduced；
    Judge the non-final stage breaker in the regional choice sex-kink time tzsiInside whether receive from next stage breaker Regional choice sex-kink input signal,
    If it is, in stand-by protection time tsdIf failure is still present after arrival, the non-final stage circuit breaker tripping；
    If it is not, the non-final stage breaker is in the regional choice sex-kink time tzsiThreaded off after arrival.
  2. 2. regioselectivity chained approach according to claim 1, it is characterised in that described based on the failure detected electricity Flow valuve zoning selects sex-kink time tzsiAnd/or stand-by protection time tsdIncluding：
    Directly utilize fault curre zoning selection sex-kink time tzsiAnd/or stand-by protection time tsd；
    Sex-kink time t is selected using the rate of change zoning of fault currezsiAnd/or stand-by protection time tsd；
    Utilize the energy balane regional choice sex-kink time t of fault currezsiAnd/or stand-by protection time tsd；Or
    Utilize at least two in the energy of fault curre, the rate of change of fault curre and fault curre these three parameters Calculate the regional choice sex-kink time tzsiAnd/or stand-by protection time tsd。
  3. 3. regioselectivity chained approach according to claim 1, it is characterised in that described based on the failure detected electricity Flow valuve zoning selects sex-kink time tzsiIncluding：
    Zoning selects sex-kink time tzsi, wherein tzsiWith fault current threshold value direct proportionality, and tzsiWith inspection The inversely proportional relation of fault curre measured,Wherein A is pre-determined factor；IsdFor fault current Threshold value；IfaultFor the fault curre detected；tmecFor the mechanical trip time.
  4. 4. regioselectivity chained approach according to claim 1, it is characterised in that described based on the failure detected electricity Flow valuve calculates stand-by protection time tsdIncluding：
    Calculate the stand-by protection time of n-th grade of breaker
    WhereinWith fault current threshold value direct proportionality,For the regioselectivity of (n-1)th grade of breaker Chain time, tmecFor the mechanical trip time；tpFor predetermined time value.
  5. 5. a kind of breaker, it includes fault current threshold value setting unit, time calculating unit and trip unit, wherein：
    Fault current threshold value setting unit, it is configured to set fault current threshold value for breakers at different levels；
    Time calculating unit, it is configured to when the fault curre for judging to detect is not less than the fault current threshold value, Sex-kink time t is selected based on the fault curre zoning detectedzsiWith stand-by protection time tsd, wherein regional choice Sex-kink time tzsiReduced, stand-by protection time t as the fault curre detected increasessdWith the failure detected Current value increases and reduced；
    Trip unit, it is configured to judge in the regional choice sex-kink time tzsiInside whether receive and break from next stage The regional choice sex-kink input signal of road device,
    If it is, in stand-by protection time tsdThreaded off after arrival if failure is still present；
    If it is not, then in the regional choice sex-kink time tzsiThreaded off after arrival.
  6. 6. breaker according to claim 5, wherein time calculating unit are configured to：
    Directly utilize fault curre zoning selection sex-kink time tzsiAnd/or stand-by protection time tsd；
    Sex-kink time t is selected using the rate of change zoning of fault currezsiAnd/or stand-by protection time tsd；
    Utilize the energy balane regional choice sex-kink time t of fault currezsiAnd/or stand-by protection time tsd；Or
    Utilize at least two in the energy of fault curre, the rate of change of fault curre and fault curre these three parameters Calculate the regional choice sex-kink time tzsiAnd/or stand-by protection time tsd。
  7. 7. breaker according to claim 5, it is characterised in that
    Time calculating unit is used for zoning selection sex-kink time tzsi, wherein tzsiIt is in direct ratio with fault current threshold value Relation, and tzsiWith the inversely proportional relation of fault curre detected,Wherein A is predetermined system Number；IsdFor fault current threshold value；IfaultFor the fault curre detected；tmecFor the mechanical trip time.
  8. 8. breaker according to claim 5, it is characterised in that
    Time calculating unit is used to calculate stand-by protection time t based on the fault curre detectedsdIncluding：
    Calculate the stand-by protection time of n-th grade of breaker
    WhereinWith fault current threshold value direct proportionality,For the regioselectivity of (n-1)th grade of breaker Chain time, tmecFor the mechanical trip time；tpFor predetermined time value.
  9. 9. a kind of circuit breaker system, including the first breaker and the second breaker, wherein the second breaker is located at the first breaker Subordinate；Characterized in that,
    First breaker is the breaker described in any one in claim 5 to 8；
    Second breaker, for when detecting short trouble to the first breaker sending zone selectivity interlocking signal.
CN201310224683.4A 2013-06-06 2013-06-06 The regioselectivity chained approach of breaker, device and system Active CN104242256B (en)

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