CN106786419A - Wind power plant based on station domain protection philosophy collects system relay protection method - Google Patents
Wind power plant based on station domain protection philosophy collects system relay protection method Download PDFInfo
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- CN106786419A CN106786419A CN201611192814.5A CN201611192814A CN106786419A CN 106786419 A CN106786419 A CN 106786419A CN 201611192814 A CN201611192814 A CN 201611192814A CN 106786419 A CN106786419 A CN 106786419A
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- fault
- feeder line
- zero
- collects
- mutual inductor
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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
- H02H7/261—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 involving signal transmission between at least two stations
- H02H7/263—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 involving signal transmission between at least two stations involving transmissions of measured values
Abstract
Collect system relay protection method the invention discloses a kind of wind power plant based on station domain protection philosophy, including：Respectively collecting, feeder line exit, ground connection become side and main transformer low-pressure side is respectively mounted identical protective relaying device; often set protective relaying device follows IEC61850 stipulations and is communicated, and its internal electron formula transformer is measured the electric quantity information for obtaining and is sent to station level decision center；Fault type is determined according to the magnitude relationship between each electric quantity information by station level decision center, corresponding station domain protection mechanism is enabled further according to fault type.The method has fully taken into account the complicated fault characteristic and the special topological structure of wind power plant of blower fan; the multiterminal information content collected by using electronic mutual inductor carries out fault distinguishing; the station domain protection new principle of construction has preferable selectivity and quick-action, it is adaptable to the wind-power electricity generation station of all kinds different capabilities size.
Description
Technical field
The present invention relates to technical field of relay protection, more particularly to a kind of wind power plant based on station domain protection philosophy is collected and is
System relay protecting method.
Background technology
Under the background of wind-powered electricity generation extensive development, as the wind-powered electricity generation scale for accessing power network constantly expands, the failure of wind power plant
Characteristic brings a series of new challenges to the safe and stable operation of power system.Especially ensureing power network and wind power plant safety
In the protection control measure problem of operation, wind power plant increasingly strengthens for the influence of power system, and be considered as wind power plant by tradition
The processing mode for imitating load is no longer applicable.Because blower fan is different from the short circuit curve of normal power supplies, research meet selectivity, can
Wind field protection by property, rapidity, sensitivity is significant to aspects such as the stable operations of wind power plant and power system.
Current wind power plant collects system and uses traditional relay protection, and fault distinguishing is carried out using single-end information amount.Collecting
Differential current protection is configured on bus, two-part current protection and zero sequence excess current protection are configured on feeder line is collected.But by
Power electronic devices is installed in wind-driven generator and using complicated control strategy, cause its fault characteristic to be generated electricity with conventional synchronization
Machine is significantly different, while the special topological structure of wind power plant is also for relay protection correct operation brings challenge.As wind-powered electricity generation enters
Net ratio is continuously increased, and wind power plant collects system conventional protection device and tripping occurs and increasingly highlighted with the problem of malfunction, therefore pin
To wind power plant research better adaptability to collect system protection new principle significant.
The content of the invention
Collect system relay protection method it is an object of the invention to provide a kind of wind power plant based on station domain protection philosophy, have
Have the advantages that reliability is high, sensitivity is high, it is adaptable to the wind-power electricity generation station of all kinds different capabilities size.
The purpose of the present invention is achieved through the following technical solutions：
A kind of wind power plant based on station domain protection philosophy collects system relay protection method, including：
Respectively collecting, feeder line exit, ground connection become side and main transformer low-pressure side is respectively mounted identical protective relaying device, often
Set protective relaying device follows IEC61850 stipulations and is communicated, and its internal electron formula transformer is measured the electrical quantity letter for obtaining
Breath is sent to station level decision center；
Fault type is determined according to the magnitude relationship between each electric quantity information by station level decision center, further according to event
Barrier type enables corresponding station domain protection mechanism.
It is described to be included determining fault type according to the magnitude relationship between each electric quantity information by station level decision center：
When kth collects the zero-sequence current of the electronic mutual inductor measurement in feeder line exitEqual to the electronics that ground connection becomes side
The zero-sequence current of the collection bus that formula transformer measurement is arrivedThen represent that kth collects feeder line and single-phase fault occurs：
When kth collects the electric current of the electronic mutual inductor measurement in feeder line exitElectronic type with main transformer low-pressure side is mutual
The electric current that sensor is measuredMeet following formula, then kth collects feeder line generation phase-to phase fault：
Wherein, KadIt is adjustment factor；
When the zero-sequence current of the collection bus that the electronic mutual inductor that ground connection becomes side is measuredCollect feeder line with each to go out
The zero-sequence current that the zero-sequence current of electronic mutual inductor measurement and the electronic mutual inductor of main transformer low-pressure side at mouthful are measured
Difference be all higher than setting setting valve Iset1, then it represents that there is singlephase earth fault in collection bus：
Wherein, p=1, when 2,3, represents the zero-sequence current of the corresponding electronic mutual inductor measurement for collecting feeder line exit；p
=4, represent the zero-sequence current that the electronic mutual inductor of main transformer low-pressure side is measured
It is described to enable corresponding station domain protection mechanism according to fault type and include：
If collecting feeder line there is single-phase fault or phase-to phase fault, control respective circuit breakers tripping operation；
If collection bus occur singlephase earth fault, time delay or current time control breaker time.
As seen from the above technical solution provided by the invention, blower fan complicated fault characteristic and wind have been fully taken into account
The special topological structure of electric field, the multiterminal information content collected by using electronic mutual inductor carries out fault distinguishing, construction
Domain protection new principle of standing has preferable selectivity and quick-action, it is adaptable to the wind power plant of all kinds different capabilities size
Stand.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will use needed for embodiment description
Accompanying drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill in field, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 collects system station domain protection wiring schematic diagram for wind power plant provided in an embodiment of the present invention；
Fig. 2 collects circuit single-phase fault for collection bus single-phase fault protection act logical AND provided in an embodiment of the present invention
Protection act logic chart；
Fig. 3 is that flow chart is protected in station domain provided in an embodiment of the present invention；
Fig. 4 is simulation model system schematic diagram provided in an embodiment of the present invention；
Fig. 5 is collection bus singlephase earth fault simulation result figure provided in an embodiment of the present invention；
Fig. 6 collects feeder line phase-to phase fault simulation result figure for provided in an embodiment of the present invention；
Fig. 7 collects feeder line separate room fault simulation result figure for provided in an embodiment of the present invention.
Specific embodiment
With reference to the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground description, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on this
Inventive embodiment, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to protection scope of the present invention.
The embodiment of the present invention provides a kind of wind power plant based on station domain protection philosophy and collects system relay protection method, first
First, by the way of as shown in Figure 1 respectively collect feeder line exit, ground connection become side and main transformer low-pressure side be respectively mounted identical after
Electrical protective device, often covers protective relaying device and follows IEC61850 stipulations and communicated, and its internal electron formula transformer is measured
The electric quantity information for obtaining is sent to station level decision center；Then, by station level decision center according to each electric quantity information it
Between magnitude relationship determine fault type, enable corresponding station domain protection mechanism further according to fault type.
In Fig. 1, first collects feeder line, second collects feeder line, the 3rd electricity collected in the protective relaying device of feeder line exit
Minor transformer is respectively TA1, TA2, TA3；Electronic mutual inductor in main transformer low-pressure side protective relaying device is TA4；Ground connection
The electronic mutual inductor become in the protective relaying device of side is TA5.
In the embodiment of the present invention, fault type is determined according to the magnitude relationship between each electric quantity information specific as follows：
1) when kth collects the zero-sequence current of the electronic mutual inductor measurement in feeder line exitEqual to the electricity that ground connection becomes side
The zero-sequence current of the collection bus that minor transformer measurement is arrivedThen represent that kth collects feeder line and single-phase fault occurs：
Exemplary, when first collects feeder line, and single-phase fault occurs,
2) when circuit generation phase-to phase fault is collected, because system side capacity is much larger than blower fan side capacity, for non-faulting
For circuit, system side failure current weight is much larger than and respectively collects fault component electric current at line outlet, i.e.,
It is invalid.When collect circuit occur phase-to phase fault when, faulty line exit fault component electric current is by non-fault line and is
System side provides jointly, now, if kth collects the electric current of the electronic mutual inductor measurement in feeder line exitWith main transformer low pressure
The electric current that the electronic mutual inductor of side is measuredMeet following formula, then kth collects feeder line generation phase-to phase fault：
Wherein, KadIt is adjustment factor.
3) when collection bus occur singlephase earth fault, due to the connected mode that main transformer and case become, zero-sequence current is only
Flow through bus and ground connection becomes.Now current transformer TA1, TA2, TA3, the zero-sequence current at TA4 is only out-of-balance current, only
Having has obvious zero-sequence current at current transformer TA5, i.e., ground connection change zero-sequence current is significantly greater than three and collects at line outlet
And the zero-sequence current of main transformer low-pressure side.This fault signature also indicates that the zero-sequence current of ground connection change branch road has certain numerical value,
That is system there occurs earth fault certainly, and earth fault one is positioned at current transformer TA1, and TA2, TA3, TA4, TA5 is enclosed
Into region.When the zero-sequence current of the collection bus that the electronic mutual inductor that ground connection becomes side is measuredCollect feeder line with each
The zero sequence electricity that the zero-sequence current of electronic mutual inductor measurement and the electronic mutual inductor of main transformer low-pressure side in exit are measured
The difference of stream is all higher than the setting valve I of settingset1：
Wherein, p=1, when 2,3, represents the zero-sequence current of the corresponding electronic mutual inductor measurement for collecting feeder line exit；p
=4, represent the zero-sequence current that the electronic mutual inductor of main transformer low-pressure side is measured.
Now, illustrate that ground connection becomes zero-sequence current while significantly greater than three collect at line outlet and main transformer low-pressure side
There is singlephase earth fault in zero-sequence current, i.e. collection bus：Shown in collection bus single-phase fault protection act logic such as Fig. 2 (a),
" ＆ " represents logical "and" in figure.
On the other hand, when circuit generation singlephase earth fault is collected, when its fault signature is with collection bus single-phase fault
Fault signature be similar to, simply trouble point is transferred to a certain bar and collects on feeder line by bus, and zero-sequence current loop is by bus-ground connection
Change is converted to failure and collects feeder line-ground connection change.When first collects feeder line, and single-phase fault occurs,Current transformer
Zero-sequence current at TA5 is more than TA2, TA3, the zero-sequence current at TA4, that is to say, that Protection criteria now can still be continued to use
CriterionOnly its criterion result of faulty line is " 0 ", and non-fault line its criterion result is " 1 ".When
When all criterion results are " 1 ", as collection bus single-phase fault, this kind of situation had been analyzed.Thus, circuit is collected single-phase
Shown in fault protection logic such as Fig. 2 (b), " >=1 " represents logical "or" in figure.
New criterion is protected in summary station domain, suitable with fault distinguishing by realizing the temporal mutual cooperation of each Protection criteria
The coordination of sequence, builds a kind of new wind power plant and collects the protection of system station domain.
Its protection domain collects circuit and collection bus for wind power plant 35kV, the electricity on its comprehensive utilization bus institute's line road
Stream and busbar voltage undertake the standby of section box change and protect all types failure protecting collection bus and collect circuit
Protective function.Domain protection flow stand as shown in figure 3, determining fault type according to the electric quantity information for measuring first, and then carry out
Fault location, further according to fault type using corresponding station domain protection mechanism is enabled, if for example collecting feeder line occurs single-phase fault
Or phase-to phase fault, then control respective circuit breakers tripping operation；If there is singlephase earth fault, time delay or current in collection bus
Moment controls breaker time.In the embodiment of the present invention, divide for collection bus and the different type failure for collecting feeder line
Criterion that Cai Yong be not different recognizes abort situation；For collection bus singlephase earth fault with to collect Feeder equal
It is identified using the scheme described by above-described embodiment, and case change failure can also be by collecting feeder line phase-to phase fault new criterion
Collect circuit to position where failure case becomes；And collection bus phase-to phase fault can be known using conventional bus differential protection criterion
Not, and using conventional electric current main protection and its setting valve position phase-to phase fault place and collect circuit.
Closed test result of the present invention on power system real-time simulation device (RTDS) is given below, as shown in Figure 4.
Wind-driven generator：Rated capacity SGW is 1.5MW, stator rated voltage 0.69kV, and Stator and Rotor Windings turn ratio is
2.6377, stator resistance and leakage inductance are respectively 0.00806pu and 0.168pu, rotor resistance and leakage inductance be 0.006pu and
0.152pu, magnetizing inductance is 3.48pu.
Case becomes：Rated capacity ST1N is 1.6MVA, and rated voltage is 35000 ± 2 × 2.5%/690V, and connection group number is D/
Yn11, primary side rated current is 26.39A, and secondary side rated current is 1338.8A, and short-circuit impedance UT1k% is 6.5, load
It is 1610W to be lost, and open circuit loss is 13156W, and no-load current is 2.95A.
Collect circuit：Voltage class 35kV, is trolley line, and model LGJ-150, length is 10km, resistance per unit length
R1=0.21 Ω/km, x1=0.379 Ω/km, x0=1.33 Ω/km are respectively with reactance.
Main transformer：Rated capacity ST2N is 100MVA, and rated voltage is 230 ± 8 × 1.25%/35kV, and connection group number is YN/
D11, high-pressure side rated current is 251A, and low-pressure side rated current is 1649.6A, and short-circuit impedance UT2k% is 14.22, and load is damaged
It is 285kW to consume, and open circuit loss is 63.4kW, and no-load current is 0.2%.
Grounding transformer：Rated capacity 1220kVA, rated voltage 35/10.5kV, connection group number are Znyn11, primary side
Neutral point is grounded through 261 Ω earth resistances rg, and secondary side is unloaded, and zero sequence impedance ZT0 is 133 Ω.
The general very little of Zero-sequence Impedance for Earthing Transformer, only 10 ohms.
Transmission line：Voltage class 220kV, length 50km, unit length parameter r ' 1=0.076 Ω/km, x ' 1=0.338
Ω/km, r ' 0=0.284 Ω/km, x ' 0=0.824 Ω/km.
System：Using External Grid simulation systems side, rated voltage is 220kV, and its maximum capacity of short circuit is
3052MVA, minimum capacity of short circuit is 1581MVA.
Example 1：There is A phase earth faults in collection bus
As seen from Figure 5, main transformer low-pressure side and the almost equal (curve in Fig. 5 of all zero-sequence current sizes for collecting feeder line
Essentially coincide), it is satisfied byJudge that bus occurs single-phase fault.Then can be according to actual conditions, time delay
Or i.e. vertical excision failure.
Example 2：First collect feeder line # ends occur AB double earthfaults collect circuit 1# ends occur A phases be grounded therefore
Barrier.
In Fig. 6 a, two articles of curves for essentially coinciding are second to collect feeder line and the 3rd and collect the A phase current curves of feeder line, are risen
The larger curve of volt is the first A phase current curves for collecting feeder line；In Fig. 6 b, two curves for essentially coinciding collect feedback for second
Line and the 3rd B current curves for collecting feeder line, the curve of big rise and fall is the first B phase current curves for collecting feeder line.
It will be appreciated from fig. 6 that first collects the A phases of feeder line, B phase short circuit currents and is all higher than setting valve, i.e. first collects feeder line hair
Two-phase or double earthfault are given birth to, immediately tripping respective circuit breakers.
Example 3：First collects feeder line # ends there is A phase earth faults
In Fig. 7, two articles of curves for essentially coinciding are second to collect feeder line and the 3rd and collect the A phase current curves of feeder line, most
The point-like curve of lower lower section is the first A phase current curves for collecting feeder line.
As shown in Figure 7, only the first zero-sequence current for collecting feeder line is unsatisfactory forCan show that first collects
Single-phase fault in feeder line, immediately tripping respective circuit breakers there is.
The such scheme of the embodiment of the present invention, the electrical quantity letter for collecting system is gathered by the electronic mutual inductor of wall
Breath, and station level decision center is uploaded to by combining unit, fault location is carried out according to new station domain Protection criteria.The party
Method has fully taken into account the complicated fault characteristic and the special topological structure of wind power plant of blower fan, is adopted by using electronic mutual inductor
The multiterminal information content for collecting carries out fault distinguishing, and the station domain protection new principle of construction has preferable selectivity and quick-action, fits
For the wind-power electricity generation station of all kinds different capabilities size.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any one skilled in the art in the technical scope of present disclosure, the change or replacement that can be readily occurred in,
Should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Enclose and be defined.
Claims (3)
1. a kind of wind power plant based on station domain protection philosophy collects system relay protection method, it is characterised in that including：
Be respectively mounted identical protective relaying device respectively collecting feeder line exit, ground connection and becoming side and main transformer low-pressure side, often cover after
Electrical protective device follows IEC61850 stipulations and is communicated, and its internal electron formula transformer is measured the electric quantity information hair for obtaining
Deliver to station level decision center；
Fault type is determined according to the magnitude relationship between each electric quantity information by station level decision center, further according to failure classes
Type enables corresponding station domain protection mechanism.
2. a kind of wind power plant based on station domain protection philosophy according to claim 1 collects system relay protection method, its
It is characterised by, it is described that fault type bag is determined according to the magnitude relationship between each electric quantity information by station level decision center
Include：
When kth collects the zero-sequence current of the electronic mutual inductor measurement in feeder line exitIt is mutual equal to the electronic type that ground connection becomes side
The zero-sequence current of the collection bus that sensor is measuredThen represent that kth collects feeder line and single-phase fault occurs：
When kth collects the electric current of the electronic mutual inductor measurement in feeder line exitElectronic mutual inductor with main transformer low-pressure side is surveyed
The electric current measuredMeet following formula, then kth collects feeder line generation phase-to phase fault：
Wherein, KadIt is adjustment factor；
When the zero-sequence current of the collection bus that the electronic mutual inductor that ground connection becomes side is measuredCollect feeder line exit with each
The zero-sequence current of electronic mutual inductor measurement and the difference of zero-sequence current that measures of the electronic mutual inductor of main transformer low-pressure side
It is all higher than the setting valve I of settingset1, then it represents that there is singlephase earth fault in collection bus：
Wherein, p=1, when 2,3, represents the zero-sequence current of the corresponding electronic mutual inductor measurement for collecting feeder line exit；P=4,
Represent the zero-sequence current that the electronic mutual inductor of main transformer low-pressure side is measured.
3. a kind of wind power plant based on station domain protection philosophy according to claim 2 collects system relay protection method, its
It is characterised by, it is described to enable corresponding station domain protection mechanism according to fault type and include：
If collecting feeder line there is single-phase fault or phase-to phase fault, control respective circuit breakers tripping operation；
If collection bus occur singlephase earth fault, time delay or current time control breaker time.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108429246A (en) * | 2018-03-29 | 2018-08-21 | 内蒙古电力勘测设计院有限责任公司 | A kind of wind power plant current collection line protection method and device |
| CN109842100A (en) * | 2017-11-27 | 2019-06-04 | 中国电力科学研究院有限公司 | A kind of improved method and system of half-wave power transmission route Zero sequence current differential protection |
| CN113092951A (en) * | 2021-06-10 | 2021-07-09 | 沈阳工业大学 | Offshore wind farm complex topology line fault information prediction method and device |
| CN113488964A (en) * | 2021-07-27 | 2021-10-08 | 西安热工研究院有限公司 | System and method for protecting high-speed permanent magnet wind driven generator and outgoing cable by electric quantity |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244380A (en) * | 2010-12-22 | 2011-11-16 | 保定天威集团有限公司 | Open-phase protection method and device of 35kV American box-type substation for wind power station |
| CN202076784U (en) * | 2011-06-28 | 2011-12-14 | 内蒙古电力勘测设计院 | Protective system for collecting line of wind power plant |
| WO2014044007A1 (en) * | 2012-09-21 | 2014-03-27 | 北京金风科创风电设备有限公司 | Wind farm automatic dynamic voltage control system |
| CN204732888U (en) * | 2015-05-25 | 2015-10-28 | 国家电网公司 | The micro-grid system of a kind of grid type island electrical network |
| CN105391033A (en) * | 2015-11-24 | 2016-03-09 | 国网甘肃省电力公司 | Layered domain-partitioned anti-islanding protection method for large-scale wind power generation |
-
2016
- 2016-12-21 CN CN201611192814.5A patent/CN106786419B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244380A (en) * | 2010-12-22 | 2011-11-16 | 保定天威集团有限公司 | Open-phase protection method and device of 35kV American box-type substation for wind power station |
| CN202076784U (en) * | 2011-06-28 | 2011-12-14 | 内蒙古电力勘测设计院 | Protective system for collecting line of wind power plant |
| WO2014044007A1 (en) * | 2012-09-21 | 2014-03-27 | 北京金风科创风电设备有限公司 | Wind farm automatic dynamic voltage control system |
| CN204732888U (en) * | 2015-05-25 | 2015-10-28 | 国家电网公司 | The micro-grid system of a kind of grid type island electrical network |
| CN105391033A (en) * | 2015-11-24 | 2016-03-09 | 国网甘肃省电力公司 | Layered domain-partitioned anti-islanding protection method for large-scale wind power generation |
Non-Patent Citations (1)
| Title |
|---|
| 陈福锋等: "风电场汇流线路同步采样及差动保护", 《电力系统自动化》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109842100A (en) * | 2017-11-27 | 2019-06-04 | 中国电力科学研究院有限公司 | A kind of improved method and system of half-wave power transmission route Zero sequence current differential protection |
| CN109842100B (en) * | 2017-11-27 | 2022-06-10 | 中国电力科学研究院有限公司 | Method and system for improving zero-sequence current differential protection of half-wavelength power transmission line |
| CN108429246A (en) * | 2018-03-29 | 2018-08-21 | 内蒙古电力勘测设计院有限责任公司 | A kind of wind power plant current collection line protection method and device |
| CN113092951A (en) * | 2021-06-10 | 2021-07-09 | 沈阳工业大学 | Offshore wind farm complex topology line fault information prediction method and device |
| CN113092951B (en) * | 2021-06-10 | 2021-08-06 | 沈阳工业大学 | Offshore wind farm complex topology line fault information prediction method and device |
| CN113488964A (en) * | 2021-07-27 | 2021-10-08 | 西安热工研究院有限公司 | System and method for protecting high-speed permanent magnet wind driven generator and outgoing cable by electric quantity |
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| Publication number | Publication date |
|---|---|
| CN106786419B (en) | 2018-11-27 |
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