CN106872885A - A kind of guard method of arc failure of being restriked in primary cut-out breaking test and device - Google Patents

A kind of guard method of arc failure of being restriked in primary cut-out breaking test and device Download PDF

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Publication number
CN106872885A
CN106872885A CN201710059835.8A CN201710059835A CN106872885A CN 106872885 A CN106872885 A CN 106872885A CN 201710059835 A CN201710059835 A CN 201710059835A CN 106872885 A CN106872885 A CN 106872885A
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China
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real
current
primary cut
time
time current
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CN201710059835.8A
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CN106872885B (en
Inventor
何东升
林志力
苗本健
周小猛
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DONGGUAN GUANG'AN ELECTRIC TESTING CENTER Co Ltd
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DONGGUAN GUANG'AN ELECTRIC TESTING CENTER Co Ltd
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Priority to CN201710059835.8A priority Critical patent/CN106872885B/en
Publication of CN106872885A publication Critical patent/CN106872885A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/327Testing of circuit interrupters, switches or circuit-breakers
    • G01R31/3271Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16566Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
    • G01R19/16571Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current

Abstract

Guard method and device the present invention relates to arc failure of being restriked in a kind of primary cut-out breaking test, the method are comprised the following steps:Step S1, when the first real-time current duration not less than primary cut-out rated current the anti-interference time is exceeded, perform step S2;Step S2, when second real-time current less than restrike arc current detected value and duration more than the T2 times when, execution step S3;Step S3, when the 3rd real-time current is not less than primary cut-out rated current and when the duration exceedes the anti-interference time, perform step S4;Step S4, when the 4th real-time current less than restrike arc current detected value and duration more than the T4 times when, execution step S5;Step S5, counter O reset simultaneously perform step S1.The present invention can not only realize that the institute of common relay protection is functional; the protection of arc failure of restriking occurred during primary cut-out breaking test can also be completed; so as to realize real-time all-the-way tracking protection to Large Copacity experiment centre, the life-span of Large Copacity experiment centre its own switch or electric equipment is substantially prolongs.

Description

A kind of guard method of arc failure of being restriked in primary cut-out breaking test and device
Technical field
The present invention relates to Large Copacity experiment centre protection technique field, and in particular to Large Copacity experiment centre primary cut-out cut-offs The guard method of arc failure of being restriked in experiment.
Background technology
In power system, the reliability of High-Voltage Electrical Appliances, stable operation are that whole network system is normal, the premise bar of efficient operation Part, the type approval test of High-Voltage Electrical Appliances is the important step for checking its performance.With the development of power system, the voltage class of system Increasingly improved with capacity of short circuit, it is also increasing for requirement that High-Voltage Electrical Appliances mesohigh breaker cut-offs short circuit current ability. The interrupting process of primary cut-out is extremely complex, it is impossible to fully relies on calculating or emulation to determine the performance of product, can only pass through Type approval test is examined to its connecting-disconnecting function.
Therefore, the Large Copacity experiment centre with certain test capability, the rated voltage specified according to primary cut-out and opens Power-off stream carries out bulk testing (i.e. straightway testing), and checking high voltage electric appliance can be examined closest to situation is actually cut-off Performance.GB1984-2014《High-voltage AC breaker》It is that existing high-voltage AC breaker mainly performs standard, it is bright in standard The true electric life test of regulation breaker need the rated voltage that pilot system is provided and it is specified cut-off fault current under carry out, Process of the test is cyclic test.
As shown in figure 1, according to national Specification, for the primary cut-out with rapid auto reclosing function Speech, " O -0.3s-CO " is that " disconnection -0.3s-closure disconnects " is a circulation, for example, for a 35kV voltage class Primary cut-out, when cut-off fault current (i.e. rated short circuit drop-out current) for 31.5kA when, carry out national Specification During basic short-circuit test T100s, its drop-out current is 100% rated short circuit drop-out current, is carrying out this type approval test examination When, Large Copacity experiment centre needs to apply rated voltage 35kV, short circuit current 31.5kA, it is assumed that under nominal situation, is broken according to height Road device one circulation " O -0.3s-CO " operation sequence of automatic reclosing, primary cut-out passes through short-circuit test electric current first 31.5kA about 100ms (T1 in Fig. 1), primary cut-out immediately enter first cut-off " O " after, whole loop for disconnect and nothing Current status continue 300ms (T2 in Fig. 1), and then primary cut-out closes " C " again, by short-circuit test electric current 31.5kA about After 100ms (T3 in Fig. 1), primary cut-out cut-offs " O " into second, after primary cut-out cut-offs, national standard Clear stipulaties in GB1984-2014:" industrial frequency experiment voltage and by residual charge produce DC voltage should be kept after cut-offfing to The decay of load side voltage is no more than 10% during 300ms after few 300ms, and the final extinguishing of electric arc ", so, primary cut-out exists Under the conditions of normal work operating mode and pass the test, Large Copacity experiment centre provides energy only under normal open position, entirely It is " 110MA that energy value is about needed in program process2s(0.1s)—0.3s—110MA2s(0.1s)”。
But actual high-voltage breaker is in process of the test, i.e., breaker cut-offs " O " at first or second is cut-off " O " Afterwards, whole loop for disconnect and no current state continue 300ms (T4 in Fig. 1) when often there is repeated breakdown or arcuation of restriking Condition, this kind of situation is not due to occurring than the obvious big excessively streams of short circuit current 31.5kA, so the relay protection devices or mistake of normal conventional Flow device cannot protect such case at all, now, Large Copacity experiment centre in whole program process under this test product malfunction It is " 110MA about to need energy value2s(0.1s)—330MA2s(0.3s)—110MA2s(0.1s)—330MA2S (0.3s) ", it is this kind of In the case of the energy value that provides be 4 times under non-faulting.For this kind of situation for the Large Copacity experiment centre device for switching of itself Or reactant devices, it is a kind of very big impact and destruction, original this breaking test of primary cut-out every time is big due to high voltage Electric current is exactly a kind of impact to Large Copacity experiment centre and is damaged, and works as test product failure, it is impossible to normally cut-off or arcing occurs When, equipment and electrical equipment to Large Copacity experiment centre are even more a kind of fatal impact and damage, and this impact and damage have Accumulation benefit, greatly accelerates the aging and retired of equipment.Because the electric equipment of Large Copacity experiment centre is because voltage class is high, electricity Stream is big, so equipment is general all costly, changes or maintenance is also to bother very much.
For doing the Large Copacity experiment centre of primary cut-out breaking test made using common or conventional relay protection at present It is protection, and common relay protection is only capable of carrying out simple excessively stream and time setting protection, for primary cut-out breaking test process Restrike arc or the re-breakdown phenomenon of middle appearance, are also at a loss what to do, cannot be protected at all.According to current this situation, this hair Bright patent solves the very thorny equipment protection problem of all of above Large Copacity experiment centre.
The content of the invention
An object of the present invention is to propose to restrike in a kind of primary cut-out breaking test the guard method of arc failure, It can complete the arc protection of restriking occurred during primary cut-out breaking test, real-time so as to be realized to Large Copacity experiment centre All-the-way tracking is protected, and substantially prolongs the life-span of Large Copacity experiment centre its own switch or electric equipment, and help failure test product high Voltage breaker research staff promptly and accurately, quick fault point, otherwise the test item ruin after blast, it is difficult to position tactile Head failure weak spot.
In order to achieve the above object, the technical solution adopted in the present invention is as follows:
A kind of guard method of arc failure of being restriked in primary cut-out breaking test, comprises the following steps:
Step S1, detection primary cut-out real-time current, now the real-time current of primary cut-out be referred to as first in real time electricity Stream, when first real-time current is not less than primary cut-out rated current, counter starts timing, is broken when not less than height When the first real-time current duration of road device rated current exceedes the anti-interference time, step S2 is performed;
Step S2, when the first real-time current duration not less than primary cut-out rated current is more than the T1 times, Detection primary cut-out real-time current, now primary cut-out real-time current be referred to as the second real-time current, when described second real-time Electric current be less than restrike arc current detected value and less than arc current detected value of restriking the second real-time current duration more than T2 when Between when, perform step S3;
Step S3, detection primary cut-out real-time current, now the real-time current of primary cut-out be referred to as the 3rd in real time electricity Stream, when the 3rd real-time current is not less than primary cut-out rated current and not less than the of primary cut-out rated current When three real-time current duration exceeded the anti-interference time, step S4 is performed;
Step S4, when the 3rd real-time current duration not less than primary cut-out rated current is more than the T3 times, Detection primary cut-out real-time current, now primary cut-out real-time current be referred to as the 4th real-time current, when the described 4th real-time Electric current be less than restrike arc current detected value and less than arc current detected value of restriking the 4th real-time current duration more than T4 when Between when, perform step S5;
Step S5, counter O reset simultaneously perform step S1.
In step S1, when the first real-time current is less than primary cut-out rated current, or, not less than primary cut-out When the first real-time current duration of rated current is no more than the anti-interference time, counter O reset simultaneously continues waiting for detection first in fact When electric current.
In step S2, if be no more than T1 not less than the first real-time current duration of primary cut-out rated current Between when, counter O reset simultaneously continue waiting for detect the first real-time current;If second real-time current is not less than arc electricity of restriking When flowing detected value and exceeding the anti-interference time not less than the second real-time current duration of arc current detected value of restriking, then protection is jumped Lock, and counter O reset, while performing step S1.
In step S2, the second real-time current duration if less than arc current detected value of restriking is no more than the T2 times When, then continue waiting for detecting the second real-time current.
In step S3, if the 3rd real-time current is less than primary cut-out rated current, and less than primary cut-out volume When determining the 3rd real-time current duration of electric current more than the T3 times, then step S5 is performed;It is specified if less than primary cut-out When the 3rd real-time current duration of electric current is no more than the T3 times, then the 3rd real-time current is continued waiting for.
In step S3, if being no more than anti-interference not less than the 3rd real-time current duration of primary cut-out rated current During the time, then the 3rd real-time current is continued waiting for.
In step S4, if the 4th real-time current is not less than the arc current detected value and not less than arc current of restriking of restriking When the 4th real-time current duration of detected value exceedes the anti-interference time, then trip protection, and counter O reset, while performing step Rapid S1.
In step S4, if be no more than T3 not less than the 3rd real-time current duration of primary cut-out rated current Between when, continue waiting for detect the 3rd real-time current;If less than the 4th real-time current duration of arc current detected value of restriking During no more than the T4 times, then continue waiting for detecting the 4th real-time current.
The T1 times and T3 times are [90ms, 110ms], and the T2 times are [290ms, 310ms], during the T4 Between be not less than 300ms, the anti-interference time be [5ms, 20ms];The arc current detected value of restriking is for the specified electricity of primary cut-out The 40%~60% of stream.
Another object of the present invention is to a kind of protection device of the arc failure that proposes to restrike in primary cut-out breaking test, It can complete the arc protection of restriking occurred during primary cut-out breaking test, real-time so as to be realized to Large Copacity experiment centre All-the-way tracking is protected, and substantially prolongs the life-span of Large Copacity experiment centre its own switch or electric equipment, and help failure test product high Voltage breaker research staff promptly and accurately, quick fault point, otherwise the test item ruin after blast, it is difficult to position tactile Head failure weak spot.
In order to achieve the above object, the technical solution adopted in the present invention is as follows:
A kind of protection device of arc failure of being restriked in primary cut-out breaking test, it includes:
AC sampling and power insert, the AC sampling and power insert are used to that high pressure to be powered and gathered for protection device Breaker real-time current;
Protection and MMI plug-in units, the protection and MMI plug-in units are used to receive AC sampling and the height of power insert collection breaks Road device real-time current simultaneously performs the guard method of arc failure of restriking in above-mentioned primary cut-out breaking test;
It is described protection and MMI plug-in units include DSP protection modules and MMI processing modules, wherein, the DSP protection modules and Data exchange is realized by High Speed Serial between MMI processing modules, and the DSP protection modules are used to pass through speed A/D converter Receive the primary cut-out real-time current of AC sampling and power insert collection and perform above-mentioned primary cut-out breaking test In restrike the guard method of arc failure, the MMI processing modules are for man-machine interface treatment;
Input and output plug-in unit or/and operation circuit module plug-in;
The input and output plug-in unit includes intake input channel and outputs passage, and described opening is grasped into passage including position Make, function is thrown and moves back operation and peripheral operation, the passage of outputing is jumped including trip protection outlet and signal, reclosing, non electrical quantity Lock and non electrical quantity are alerted;
The operation circuit module plug-in includes relay outlet and breaker operator circuit, and the relay outlet includes Breaker control is exported and signal outlet, and the breaker control outlet includes trip protection, reclosing outlet, breaker remote Division is exported, and the signal outlet includes advance notice resultant signal, fault-signal and actuating signal, and the breaker operator circuit includes The outlet of position signalling and the outlet of abnormal signal, the position letter include that breaker closes position, point position position and position after conjunction; The abnormal signal includes accident resultant signal and control loop template, while starting the control signal of the advance notice resultant signal;
Bus board, the AC sampling and power insert, protection and MMI plug-in units, input and output plug-in unit or/and operation circuit Module plug-in is connected by bus with the bus board, for realize AC sampling and power insert and protection and MMI plug-in units it Between communication and protection and the communication between MMI plug-in units and input and output plug-in unit or/and operation circuit module plug-in.
The present invention has the advantages that:
The present invention solves current all Large Copacity experiment centres during primary cut-out breaking test is carried out, due to big The switch or electric equipment at capacity test station itself are connected in whole loop, when test product breaks down, Large Copacity experiment centre The switch or electric equipment of itself accelerate the aging and retired problem of equipment of itself by as funerary objects.In addition can also Primary cut-out research staff is helped to be directed to failure test product promptly and accurately, quick positioning failure weak spot improves rapidly improvement and produces Moral character energy.The present invention can be protected according to test procedure and primary cut-out switching manipulation formula real-time tracking, can not only be realized The institute of common relay protection is functional, moreover it is possible to complete restrike arc or the repeated breakdown protection occurred during primary cut-out breaking test, So as to realize real-time all-the-way tracking protection to Large Copacity experiment centre, substantially prolongs Large Copacity experiment centre its own switch or electrical equipment sets The standby life-span.
Brief description of the drawings
Fig. 1 is the timing diagram that existing primary cut-out cut-offs principle;
Fig. 2 restrike in experiment the guarantor of arc failure for the Large Copacity experiment centre primary cut-out of present pre-ferred embodiments cut-offs The flow chart of maintaining method;
Fig. 3 restrike in experiment the guarantor of arc failure for the Large Copacity experiment centre primary cut-out of present pre-ferred embodiments cut-offs The theory diagram of protection unit.
Specific embodiment
Below, with reference to accompanying drawing and specific embodiment, the present invention is described further.
Refer to shown in Fig. 2, the protection of arc failure of being restriked in primary cut-out cut-offs experiment by Large Copacity experiment centre Method, it is comprised the following steps:
Step 1, detection primary cut-out real-time current, now primary cut-out is to close state, and defines now high pressure The real-time current of breaker is referred to as the first real-time current, when the first real-time current is more than (or equal to) primary cut-out rated current (I1) when, the counter of DSP microprocessors starts timing, if first real-time current is less than primary cut-out rated current, Then counter O reset, continues waiting for detecting first real-time current;
It is (anti-more than (being more than) anti-interference time when the first real-time current duration not less than primary cut-out rated current The time of disturbing can be configured according to specific needs, generally can use 5-20ms) when, counter may proceed to timing, and meeting Real-time current is persistently tracked, if the duration is not above the anti-interference time, explanation is probably interference electric current, then counter is clear Zero, continue waiting for detecting first real-time current.That is the first real-time current is not less than the specified electricity of primary cut-out Stream and its duration exceed the anti-interference time when, can just perform step 2.
Step 2, counter continue timing, when the first real-time current is not less than primary cut-out rated current and duration More than T1 times (90ms≤T1≤110ms, preferably 100ms), now primary cut-out is in state of cut-offfing, detection now high pressure Whether more than restriking, (I2, I2 are about I1's to arc current detected value to breaker real-time current (being defined as the second real-time current)
40%~60%), if the second real-time current exceedes arc current detected value of restriking, judge to exceed arc current of restriking Whether the duration of the second real-time current of detected value exceedes the anti-interference time (being calculated by counter), if it exceeds anti- Disturb the time, then starting protection program, trip protection, unison counter is reset, and the behaviour that primary cut-out returns to step 1 is closed again Make.And if stopped to the T1+T2 times (290ms≤T2≤310ms) from the T1 times, the second real-time current is always not above restriking Arc current detected value is no more than anti-interference time, the then behaviour for carrying out step 3 more than the duration of arc current detected value of restriking Make.
Step 3, detection primary cut-out real-time current, now primary cut-out be in and close state, definition now high pressure Breaker real-time current is the 3rd real-time current, judges the 3rd real-time current and primary cut-out rated current, if less than Primary cut-out rated current and duration are more than the T3 times (90ms≤T3≤110ms, preferably 100ms), then explanation experiment Finish, counter O reset, come back to the operation of step 1.
If the 3rd real-time current is more than (or equal to) primary cut-out rated current (I1), and not less than high pressure open circuit When the 3rd real-time current duration of device rated current is more than the anti-interference time, then counter starts to calculate and should be broken not less than height The 3rd real-time current duration of road device rated current is more than the T3 times, if it is, performing the operation of step 4.
And when being not less than the 3rd real-time current duration of primary cut-out rated current no more than the anti-interference time or The T3 times are no more than not less than the 3rd real-time current duration of primary cut-out rated current or less than primary cut-out The duration of the 3rd real-time current of rated current is no more than the T3 times, then continue waiting for the 3rd real-time current of detection (again Perform the operation of step 3).
Step 4, counter continue timing, when the 3rd real-time current is not less than primary cut-out rated current and duration More than the T3 times, now in state of cut-offfing, now primary cut-out real-time current (is defined as the 4th real to primary cut-out for detection When electric current) whether exceed and restrike arc current detected value, if the 4th real-time current exceedes arc current detected value of restriking, judge super Whether the duration of the 4th real-time current of overweight arcing current detected value exceedes the anti-interference time, if it exceeds the anti-interference time, Then starting protection program, trip protection, unison counter clearing, close the operation that primary cut-out returns to step 1 again.And such as Fruit is stopped from the T3 times to the T1+T2+T3+T4 times (T4 is not less than 300ms), and the 4th real-time current is always not above arc electricity of restriking Stream detected value is no more than the anti-interference time more than the duration of arc current detected value of restriking, then counter O reset is returned again To the operation of step 1.
The protection device of arc failure of being restriked in primary cut-out cut-offs experiment by Large Copacity experiment centre, the protection device For realizing above-mentioned guard method.Refer to shown in Fig. 3, the protection device specifically includes following part:
1st, AC sampling and power insert (AI/POWER plug-in units)
AC sampling selects high performance Switching Power Supply as working power with power insert, and Switching Power Supply is located at plug-in unit Top.Switching Power Supply can produce 5V, ± 12V and tetra- groups of voltage supply protection devices of 24V to use.
Totally 13 analog input transformers are there is also mounted on AC sampling and power insert, it is mutual including 8 electric currents Sensor and 5 voltage transformers.In order to improve certainty of measurement, device is configured with protection CT and measurement CT.Converted by transformer The passive filtering passage of protection and MMI plug-in units is directly input to by bus board with the signal after isolation.
2nd, protection and MMI plug-in units (CPU card)
Protection and the core that MMI plug-in units are this protection device, the element in protection and MMI plug-in units are installed and all use SMT Paster technique, antijamming capability and production in enormous quantities ability are improved with this.There are two CPU modules on protection and MMI plug-in units:MMI Processing module and DSP protection modules.MMI processing modules and DSP protection modules are by High Speed Serial exchange data, therefore measurement number According to the refreshing with SOE events and uploading speed quickly.
MMI processing modules and DSP protection modules in protection and MMI plug-in units are respectively provided with good self detecting function, and And can be monitored mutually between MMI processing modules and DSP protection modules, when permanent fault occurs in any of which CPU module When, another CPU will provide warning information, and (warning information is protection exit or interface prompt;In MMI processing module failures When, DSP protection modules provide protection exit information;In DSP protection module failures, MMI processing modules provide interface prompt letter Breath).MMI processing modules are mainly responsible for man-machine interface treatment (liquid crystal display and keyboard operation) of protection device;DSP protection modules Opening for main responsible protection device judges into collection, electricity computing, relay protective scheme, exports the work such as transmission and failure wave-recording.DSP The computing CPU of protection module, it uses advanced technical grade dsp processor, and DSP protection modules have also selected technical grade 16 high Fast converter.Such hardware platform so that protection device possesses arithmetic speed and certainty of measurement very high.The DSP is protected Module also includes a hardware frequency senser and one outlet measure loop.
Communication aspect, protection and MMI plug-in units provide be connected with MMI processing modules a RS485 interface, one CAN interface and an Ethernet interface, can be used to realize and peripheral monitoring device communication.
3rd, input and output plug-in unit (DI/RO plug-in units)
14 tunnel intake input channels of input and output plug-in card configuration, wherein there is a common port on 10 tunnels, 4 tunnels have one in addition Individual common port.Each intake input channel can select AC/DC220V, DC110V or DC24V voltage with hardware.Each intake Input channel can freely be configured by menu or debugging software, and selectable punction includes that position, function throwing are moved back, outside is grasped Make.
There are 6 roads to output passage on input and output plug-in unit.They not only can be used as control outlet but also can be used as signal outlet, user Flexible configuration, the signal bag of definable can be carried out to their particular use respectively by protection device menu or communication modes Include:Trip protection is exported and signal, reclosing, non electrical quantity tripping operation, non electrical quantity are alerted etc..
4th, operation circuit module plug-in
Operation circuit module plug-in is integrated with relay outlet and breaker operator circuit two parts function simultaneously.Wherein:
Relay outlet is made up of two parts:Breaker control is exported and signal outlet.Breaker control outlet includes:One (if it is desired, one group can be extended out again, the second group interface is mainly used in tripping operation distribution low-voltage side breaker to group trip protection, can Realized with the alternate outlets on self-defined input and output plug-in unit), the outlet of one group of reclosing, one group of breaker remote division export; Signal outlet includes:(normally closed contact, the signal is same when occurring for advance notice resultant signal (normally closed contact, can button involution), fault-signal Shi Qidong predict resultant signal), actuating signal.
Breaker operator circuit possesses the work(such as breaker tripping and closing are kept, anti-jump, circuit breaker position is monitored, closing loop monitoring Can, it can provide the outlet of two classes:The outlet of position signalling and the outlet of abnormal signal.Wherein, position signalling has:Breaker is closed Position, point position position and position signalling after conjunction;Abnormal signal has:(self-sustaining can only be believed accident resultant signal by adding manual brake separating Number involution) and control loop template, while starting the control signal of advance notice resultant signal.
5th, bus board
Bus board is used to connect the aforementioned four feature card of protection device as a carrier.Meanwhile, bus 196 × 64 lattice lcds (color is white gravoply, with black engraved characters) for man-machine display, 9 menu operation keys and 8 LED are integrated with plate Signal lamp.On the premise of ensureing that anti-interference is good, so design causes that protection device is simple for structure compact, dismounting side Just, beneficial to on-site maintenance.
For a person skilled in the art, technical scheme that can be as described above and design, make other each Plant corresponding change and deform, and all these changes and deforms the protection model that should all belong to the claims in the present invention Within enclosing.

Claims (10)

1. the guard method of arc failure of being restriked in a kind of primary cut-out breaking test, it is characterised in that comprise the following steps:
Step S1, detection primary cut-out real-time current, now the real-time current of primary cut-out be referred to as the first real-time current, when When first real-time current is not less than primary cut-out rated current, counter starts timing, when not less than primary cut-out When the first real-time current duration of rated current exceedes the anti-interference time, step S2 is performed;
Step S2, when the first real-time current duration not less than primary cut-out rated current is more than the T1 times, detection Primary cut-out real-time current, now primary cut-out real-time current be referred to as the second real-time current, when second real-time current Less than restrike arc current detected value and less than arc current detected value of restriking the second real-time current duration more than the T2 times when, Perform step S3;
Step S3, detection primary cut-out real-time current, now the real-time current of primary cut-out be referred to as the 3rd real-time current, when It is when 3rd real-time current is not less than primary cut-out rated current and real not less than the 3rd of primary cut-out rated current the When current duration when exceeding the anti-interference time, perform step S4;
Step S4, when the 3rd real-time current duration not less than primary cut-out rated current is more than the T3 times, detection Primary cut-out real-time current, now primary cut-out real-time current be referred to as the 4th real-time current, when the 4th real-time current Less than restrike arc current detected value and less than arc current detected value of restriking the 4th real-time current duration more than the T4 times when, Perform step S5;
Step S5, counter O reset simultaneously perform step S1.
2. the guard method of arc failure of being restriked in primary cut-out breaking test according to claim 1, it is characterised in that In step S1, when the first real-time current is less than primary cut-out rated current, or, not less than primary cut-out rated current The first real-time current duration be no more than the anti-interference time when, counter O reset simultaneously continue waiting for detect the first real-time current.
3. the guard method of arc failure of being restriked in primary cut-out breaking test according to claim 1, it is characterised in that In step S2, if not less than primary cut-out rated current the first real-time current duration no more than T1 times when, meter Number device resets and continues waiting for detecting the first real-time current;If second real-time current is not less than arc current detected value of restriking And when exceeding the anti-interference time not less than the second real-time current duration of arc current detected value of restriking, then trip protection, and meter Number device resets, while performing step S1.
4. the guard method of arc failure of being restriked in primary cut-out breaking test according to claim 1, it is characterised in that In step S2, if less than arc current detected value of restriking the second real-time current duration no more than T2 times when, then continue Etc. the second real-time current to be detected.
5. the guard method of arc failure of being restriked in primary cut-out breaking test according to claim 1, it is characterised in that In step S3, if the 3rd real-time current is less than primary cut-out rated current, and less than primary cut-out rated current When 3rd real-time current duration is more than the T3 times, then step S5 is performed;If less than the of primary cut-out rated current When three real-time current duration are no more than the T3 times, then the 3rd real-time current is continued waiting for.
6. the guard method of arc failure of being restriked in primary cut-out breaking test according to claim 1, it is characterised in that In step S3, if be no more than the anti-interference time not less than the 3rd real-time current duration of primary cut-out rated current, Then continue waiting for the 3rd real-time current.
7. the guard method of arc failure of being restriked in primary cut-out breaking test according to claim 1, it is characterised in that In step S4, if the 4th real-time current is not less than the arc current detected value and not less than arc current detected value of restriking of restriking When 4th real-time current duration exceeded the anti-interference time, then trip protection, and counter O reset, while performing step S1.
8. the guard method of arc failure of being restriked in primary cut-out breaking test according to claim 1, it is characterised in that In step S4, if not less than primary cut-out rated current the 3rd real-time current duration no more than T3 times when, after 3rd real-time current to be detected such as continuous;The 4th real-time current duration if less than arc current detected value of restriking is no more than T4 During the time, then continue waiting for detecting the 4th real-time current.
9. the guard method of arc failure of being restriked in the primary cut-out breaking test according to claim any one of 1-8, its It is characterised by, the T1 times and T3 times are [90ms, 110ms], the T2 times are [290ms, 310ms], the T4 Time is not less than 300ms, and the anti-interference time is [5ms, 20ms];The arc current detected value of restriking is for primary cut-out is specified The 40%~60% of electric current.
10. the protection device of arc failure of being restriked in a kind of primary cut-out breaking test, it is characterised in that it includes:
AC sampling and power insert, the AC sampling and power insert are used to that high pressure open circuit to be powered and gathered for protection device Device real-time current;
Protection and MMI plug-in units, the protection and MMI plug-in units are used to receive the primary cut-out of AC sampling and power insert collection The protection side of arc failure of being restriked in the primary cut-out breaking test described in real-time current and perform claim requirement any one of 1-8 Method;
The protection and MMI plug-in units include DSP protection modules and MMI processing modules, wherein, at the DSP protection modules and MMI Data exchange is realized by High Speed Serial between reason module, and the DSP protection modules are used to be received by speed A/D converter AC sampling and the primary cut-out real-time current and perform claim of power insert collection require that the height described in any one of 1-8 breaks The guard method of arc failure of being restriked in the device breaking test of road, the MMI processing modules are for man-machine interface treatment;
Input and output plug-in unit or/and operation circuit module plug-in;
The input and output plug-in unit includes intake input channel and outputs passage, and described opening includes position operation, work(into passage Can throw move back operation and peripheral operation, it is described output passage including trip protection outlet and signal, reclosing, non electrical quantity tripping operation and Non electrical quantity is alerted;
The operation circuit module plug-in includes relay outlet and breaker operator circuit, and the relay outlet includes open circuit Device control outlet and signal outlet, the breaker control outlet include trip protection, reclosing outlet, breaker remote division Outlet, the signal outlet includes advance notice resultant signal, fault-signal and actuating signal, and the breaker operator circuit includes position The outlet of signal and the outlet of abnormal signal, the position letter include that breaker closes position, point position position and position after conjunction;It is described Abnormal signal includes accident resultant signal and control loop template, while starting the control signal of the advance notice resultant signal;
Bus board, the AC sampling and power insert, protection and MMI plug-in units, input and output plug-in unit or/and operation circuit module Plug-in unit is connected by bus with the bus board, for realizing between AC sampling and power insert and protection and MMI plug-in units Communication and protection and the communication between MMI plug-in units and input and output plug-in unit or/and operation circuit module plug-in.
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