CN108711839A - A kind of protective device based on wind-driven generator ring main unit device - Google Patents
A kind of protective device based on wind-driven generator ring main unit device Download PDFInfo
- Publication number
- CN108711839A CN108711839A CN201810507524.8A CN201810507524A CN108711839A CN 108711839 A CN108711839 A CN 108711839A CN 201810507524 A CN201810507524 A CN 201810507524A CN 108711839 A CN108711839 A CN 108711839A
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- Prior art keywords
- protection device
- electric signal
- wind
- mutual inductor
- driven generator
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- Pending
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- 230000001681 protective effect Effects 0.000 title claims abstract description 36
- 230000001012 protector Effects 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 abstract description 8
- 238000004880 explosion Methods 0.000 description 6
- 230000008439 repair process Effects 0.000 description 6
- 230000005611 electricity Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
-
- 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
- H02H7/22—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 for distribution gear, e.g. bus-bar systems; for switching devices
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a kind of protective devices based on wind-driven generator ring main unit device; including mutual inductor and protection device; the input terminal of mutual inductor is connect with power supply, and the output end of mutual inductor is connect with the input terminal of protection device, to reduce the electric signal for flowing through protection device.It can be seen that, due to being connected with mutual inductor in the input terminal of protection device, the electric signal for flowing through protection device can be reduced, so even if there is the unbalanced phenomenon of three-phase electric signal in certain periods, when the abnormal phase electric signal in three-phase imbalance electric signal is more than the normal operation electric signal of protection device, abnormal phase electric signal can also be become lower than to the operation electric signal for protecting device by the mutual inductor being connect with protection device, it is delivered to protection device again, flow through operation electric signal of the electric signal less than protection device of protection device, protection device will not explode in three-phase electric signal imbalance, and then the operational efficiency of wind-driven generator can be improved.
Description
Technical field
The present invention relates to wind-driven generator application field, more particularly to a kind of guarantor based on wind-driven generator ring main unit device
Protection unit.
Background technology
Fuse rated current in the ring main unit provided at present due to producer is 63A, finds that fuse is long through overtesting
The running current of time operation is no more than 40A；Under normal circumstances, fuse electric current of the wind turbine in oepration at full load is in 35A
Left and right is still found by the electric current in wind-power electricity generation machine monitoring ring main unit, if there is three-phase current injustice in certain periods
The phenomenon that weighing apparatus, the abnormal phase current in three phase unbalance current are possible to, more than 40A, at this moment may result in molten in ring main unit
Disconnected device fuse long-time overcurrent, causes fuse fuse to overheat, and then makes fuse that explosion occur, ring main unit gas chamber is made to generate not
Recoverable damage.In order to further determine fuse explosion cause, dismantling analysis is carried out to ring main unit, is found after dismantling quick-fried
The internal fuse band connection point of fried fuse has multiple striking points, carries out judging to find not being that instantaneous large-current is caused to it
Fuse blows, it is possible to be that relatively long overcurrent causes fuse to generate heat, and then explodes；Simultaneously it has also been found that fuse
The sand that fuse failure flows out after bursting polluted switch internal, cause ring main unit plenum interior sand that can not clean out, i.e.,
Ring main unit can not repair.
Cause ring main unit that can not repair it can be seen that how to overcome fuse that explosion occurs, and then influences wind-driven generator
The problem of operational efficiency is those skilled in the art's urgent problem to be solved.
Invention content
The embodiment of the present application provides a kind of protective device based on wind-driven generator ring main unit device, to solve existing skill
The problem of causing ring main unit that can not repair because explosion easily occurs for fuse in art, and then influencing wind-driven generator operational efficiency.
In order to solve the above technical problems, the present invention provides a kind of, the protection based on wind-driven generator ring main unit device fills
Set, including mutual inductor and protection device, the input terminal of the mutual inductor connect with power supply, the output end of the mutual inductor and
The input terminal connection of the protection device, to reduce the electric signal for flowing through the protection device.
Preferably, further include the potential indicator being connect with the protection device.
Preferably, further include the backup battery being connect with the mutual inductor and the protection device.
Preferably, further include end, the protection device is connect by the end with cable cabinet.
Preferably, further include and the matched casing of the end.
Preferably, further include the warning device being connect with the output end of the mutual inductor, the warning device is for working as institute
When stating specified electric signal of the electric signal more than the protection device, alarm.
Preferably, further include the earthing switch being connect with the protection device.
Preferably, further include the disconnecting switch being connect with the protection device.
Preferably, the protection device is specially breaker.
Preferably, the mutual inductor is specially current transformer.
Compared with the prior art, a kind of protective device based on wind-driven generator ring main unit device provided by the present invention,
Including mutual inductor and protection device, the input terminal of mutual inductor is connect with power supply, output end and the protection device of mutual inductor
Input terminal connects, to reduce the electric signal for flowing through protection device.It can be seen that the protective device, in the input terminal of protection device
It is connected with mutual inductor, the electric signal for flowing through protection device can be reduced, even if it is uneven three-phase electric signal occur in certain periods
The phenomenon that, that is to say, that even if the abnormal phase electric signal in three-phase imbalance electric signal is more than the normal operation telecommunications of protection device
Number, abnormal phase electric signal can also be become lower than to the operation telecommunications for protecting device by the mutual inductor being connect with protection device
Number, it is then sent to protection device, flows through operation electric signal of the electric signal less than protection device of protection device, protection device exists
It will not explode when three-phase electric signal imbalance, and then the operational efficiency of wind-driven generator can be improved.
Description of the drawings
Fig. 1 is shown by a kind of protective device structure based on wind-driven generator ring main unit device that the embodiment of the present invention provides
It is intended to；
Another protective device structure based on wind-driven generator ring main unit device that Fig. 2 is provided by the embodiment of the present invention
Schematic diagram.
Specific implementation mode
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art obtained without making creative work it is all its
Its embodiment, shall fall within the protection scope of the present invention.
Core of the invention is to provide a kind of protective device based on wind-driven generator ring main unit device, can solve existing
The problem of causing ring main unit that can not repair because explosion easily occurs for fuse in technology, and then influencing wind-driven generator operational efficiency.
In order to make those skilled in the art more fully understand the solution of the present invention, below in conjunction with the accompanying drawings and specific embodiment party
The present invention is described in further detail for formula.
Fig. 1 is shown by a kind of protective device structure based on wind-driven generator ring main unit device that the embodiment of the present invention provides
It is intended to, as shown in Figure 1, including mutual inductor 101 and protection device 102, input terminal A and the power supply 103 of mutual inductor 101 connect
It connects, the output end B of mutual inductor 101 is connect with the input terminal C of protection device 102, to reduce the telecommunications for flowing through protection device 102
Number.A points indicate that the input terminal of mutual inductor 101, A points indicate that the output end of mutual inductor 101, C points indicate protection device 102 in Fig. 1
Input terminal.
In the prior art, the electric signal in cable is directly through protection device 102, if there is three-phase electricity in certain periods
Unbalanced phenomenon is flowed, the abnormal phase current in three phase unbalance current is possible to be more than the running current for protecting device 102,
At this moment the 102 long-time overcurrent of protection device in ring main unit is may result in, causes protection device 102 to overheat, and then make protector
The damage that part 102 occurs explosion, ring main unit gas chamber is made to generate unrepairable.Protective device provided by the embodiments of the present application, including
Mutual inductor 102 and protection device 102, the input terminal A of mutual inductor 101 are connect with power supply 103, the output end B of mutual inductor 101
It is connect with the input terminal C of protection device 103, that is, mutual inductor 101, mutual inductor 101 is connected with before protection device 102
The bigger electric signal of access can be converted to smaller electric signal output, so that it may to ensure to flow through protection device 102
Electric signal is less than the operation electric signal of protection device 102, even if there is the phenomenon that three-phase current unbalance in certain periods, protection
Device 102 will not be damaged, and can improve wind-driven generator operational efficiency.Certainly, even if connecting before protection device 102
Mutual inductor 101 is connect, when the electric signal for flowing through mutual inductor 101 is instantaneous king-sized electric signal, even if can by mutual inductor 101
The electric signal to become smaller, but the electric signal after converting still can be more than the specified electric signal of protection device 102, so this Shen
Please embodiment provide protective device still can play a protective role.Electric signal includes current signal and voltage signal；Setting
Threshold value is set in advance, and specific setting is how many properly can specifically to be set according to the type of protection device 102.In practical application
In, protective device provided by the embodiments of the present application further includes multiple cables other than protection device 102 and mutual inductor 101
(busbar), button, button protective case, cable clip, tangible end, with the mating bolt type casing of tangible end and
Fixed capacitive potential indicator DXN2-T etc..
In practical applications, preferably embodiment, protection device 102 preferably breaker, breaker are generally
The automatic disjunction control of overload current.Mutual inductor 101 is preferably current transformer, and current transformer can turn the high current of inflow
Be changed to low current output, the current transformer of the circuit institute adapted of different electric currents is different, transformer ratio has 10/5,20/5,
30/5,50/5,75/5,100/5 etc..Specifically select the current transformer of which kind of model can be determines according to actual conditions.Open circuit
Device need not change parts disconnecting general after action, may be reused, without having when instantaneous electric signal is excessive
Pass personnel periodically repair it.Breaker is generally by contact system, arc quenching system, operating mechanism, buckle releaser and shell
Deng composition.Breaker uses dual spring operating mechanism；It is understood that mutual inductor 101 is other than selecting current transformer,
Voltage transformer can also be selected；It protects device 102 other than it can select breaker, can also select with eligible
Other devices；The type of certain mutual inductor 101 and protection device 102 can't influence the realization of the embodiment of the present application.
A kind of protective device based on wind-driven generator ring main unit device provided by the present invention, including mutual inductor and protection
The input terminal of device, mutual inductor is connect with power supply, and the output end of mutual inductor is connect with the input terminal of protection device, to reduce
Flow through the electric signal of protection device.It can be seen that the protective device, it is connected with mutual inductor in the input terminal of protection device, it can be with
Reduce the electric signal for flowing through protection device, even if there is the unbalanced phenomenon of three-phase electric signal in certain periods, that is to say, that i.e.
It is more than the normal operation electric signal of protection device to make abnormal phase electric signal in three-phase imbalance electric signal, can also by with guarantor
Abnormal phase electric signal is become lower than the operation electric signal of protection device by the mutual inductor of shield device connection, is then sent to protector
Part flows through operation electric signal of the electric signal less than protection device of protection device, and protection device is in three-phase electric signal imbalance
It will not explode, and then the operational efficiency of wind-driven generator can be improved.
In order to allow the relevant personnel that can know protection 102 live line work of device in time, on the basis of the above embodiments, make
Further include the potential indicator being connect with protection device 102 to be preferably carried out mode.Electrification instruction in the embodiment of the present application
Device can select indicator light, can judge to protect whether device 102 charges by the color change of indicator light.
In order to prevent when the power supply system of wind-driven generator (power supply 103) powers off, which is stopped,
On the basis of the above embodiments, preferably embodiment further includes being connect with mutual inductor 101 and protection device 102
Match battery afterwards.The backup battery can select accumulator, when the power-off of the power supply system of wind-driven generator, utilize the backup battery
It can continue as mutual inductor 101 and protection device 102 is powered.
In practical applications, protective device provided by the embodiments of the present application is that tool is chlamydate, is filled in order to facilitate the protection
It sets and is connect with other devices (cable cabinet), on the basis of the above embodiments, preferably embodiment, the protective device is also
Including end, protection device 102 is connect by end with cable cabinet.End is preferably tangibly end, in order to
End is prevented to be directly exposed to the corrosion and extruding in air by building materials such as cement for a long time and safeguard later for convenience
Thread-changing, preferably embodiment, the protective device further include and the matched casing of end.Casing is used with end and is held
The connection type for the formula of inserting facilitates installation to connect, in practical applications, can add rubber seal in the joint of end, can
To adapt to expand with heat and contract with cold, it is also possible to prevent silt particle entrance.
Another protective device structure based on wind-driven generator ring main unit device that Fig. 2 is provided by the embodiment of the present invention
Schematic diagram has as shown in Fig. 2, when the electric signal for flowing through protective device is more than the specified electric signal of protection device 102 in order to allow
Pass personnel know in time, and on the basis of the above embodiments, preferably embodiment, which further includes and mutual inductance
The warning device 201 of the ends the output B connection of device 101, warning device 201 are used to be more than the specified of protection device 102 when electric signal
When electric signal, alarm.Warning device 201 can select indicator light, can also select buzzer.
On the basis of the above embodiments, preferably embodiment further includes the ground connection being connect with protection device 102
Switch.Since protective device provided by the embodiments of the present application is charging equipment, in order to ensure that will not occur to fill when maintenance from protection
Mains side or load side intrusion power supply are set, further includes the earthing switch being connect with protection device 102, the position of earthing switch setting
Setting can be depending on the direction that protective device may send a telegram here.Busbar in protective device can be set in the embodiment of the present application
On, when busbar overhaul, closes, even if outside has malfunction that electricity is sent on busbar, as busbar grounding is without entail dangers to people
Body safety.It can also be arranged near protection device 102, the present invention does not limit.To protect the selection breaker of device 102 to be
Example, in practical applications, earthing switch should specifically be mounted adjacent to the position of breaker, and the plug-in strip of earthing switch should be rigid
It can slide into contact of breaker spring leaf well.When earthing switch is in " ground connection " position, before not completing examination and maintenance,
Plug-in strip cannot all be pulled out out of touch spring piece in any case.
Protection device 102 and relevant circuit are overhauled for convenience, safety is further increased, in above-mentioned implementation
On the basis of example, preferably embodiment, further includes the disconnecting switch being connect with protection device 102.When needs are to protection
When device 102 or interlock circuit are overhauled, device 102 can will be protected to be isolated with other Charging systems by disconnecting switch,
Ensure the personal safety of service personnel.Illustrated for protecting device 102 to select breaker, for security consideration, to having a power failure
Circuit require the front end of circuit to must have apparent cut-off point when being operated.That is between power end and load end
There is apparent cut-off point.Although breaker can disconnect load but personal distance is inadequate, and disconnecting switch can be by power end
Opened with load isolation, especially for high-voltage electricity, disconnecting switch is particularly important, normally isolate switch be mounted on circuit most before
End, after breaker is mounted on disconnecting switch, with convenient to operate and maintenance.
A kind of protective device based on wind-driven generator ring main unit device provided by the present invention has been carried out in detail above
It introduces.Using several examples herein, principle and implementation of the present invention are described, the explanation of above example, only
It is the method and its core concept for being used to help understand the present invention；Meanwhile for those of ordinary skill in the art, according to this hair
Bright thought, there will be changes in the specific implementation manner and application range, in conclusion the content of the present specification should not manage
Solution is limitation of the present invention, and those skilled in the art repair under the premise of no creative work to what the present invention was made
Change, equivalent replacement, improvement etc., should be included in the application.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One operation is distinguished with another operation, without necessarily requiring or implying there are any between these entities or operation
This actual relationship or sequence.Moreover, the similar word such as term " comprising " so that unit, equipment including a series of elements
Or system includes not only those elements, but also include other elements that are not explicitly listed, or further include for this list
Member, equipment or the intrinsic element of system.
Claims (10)
1. a kind of protective device based on wind-driven generator ring main unit device, which is characterized in that including mutual inductor and device is protected,
The input terminal of the mutual inductor is connect with power supply, and the output end of the mutual inductor and the input terminal of the protection device connect
It connects, to reduce the electric signal for flowing through the protection device.
2. protective device according to claim 1, which is characterized in that further include that the electrification being connect with the protection device refers to
Show device.
3. the protective device according to claim 1 based on wind-driven generator ring main unit device, which is characterized in that further include
The backup battery being connect with the mutual inductor and the protection device.
4. the protective device according to claim 1 based on wind-driven generator ring main unit device, which is characterized in that further include
End, the protection device are connect by the end with cable cabinet.
5. the protective device according to claim 4 based on wind-driven generator ring main unit device, which is characterized in that further include
With the matched casing of the end.
6. the protective device according to claim 1 based on wind-driven generator ring main unit device, which is characterized in that further include
The warning device being connect with the output end of the mutual inductor, the warning device are used to be more than the protector when the electric signal
When the specified electric signal of part, alarm.
7. the protective device according to claim 1 based on wind-driven generator ring main unit device, which is characterized in that further include
The earthing switch being connect with the protection device.
8. the protective device according to claim 1 based on wind-driven generator ring main unit device, which is characterized in that further include
The disconnecting switch being connect with the protection device.
9. the protective device based on wind-driven generator ring main unit device according to claim 1 to 8 any one, feature
It is, the protection device is specially breaker.
10. the protective device according to claim 9 based on wind-driven generator ring main unit device, which is characterized in that described
Mutual inductor is specially current transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810507524.8A CN108711839A (en) | 2018-05-24 | 2018-05-24 | A kind of protective device based on wind-driven generator ring main unit device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810507524.8A CN108711839A (en) | 2018-05-24 | 2018-05-24 | A kind of protective device based on wind-driven generator ring main unit device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108711839A true CN108711839A (en) | 2018-10-26 |
Family
ID=63870640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810507524.8A Pending CN108711839A (en) | 2018-05-24 | 2018-05-24 | A kind of protective device based on wind-driven generator ring main unit device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108711839A (en) |
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| CN205452855U (en) * | 2016-01-29 | 2016-08-10 | 三明亿力森达电气设备有限公司 | Highly reliable power supply looped netowrk cabinet |
| CN205901276U (en) * | 2016-08-11 | 2017-01-18 | 湖北桑夏太阳能产业有限公司 | Distributing type photovoltaic power plant protection device that is incorporated into power networks |
| CN106684823A (en) * | 2016-12-14 | 2017-05-17 | 国网北京市电力公司 | Protection device and method for main wiring of ring-in-ring-out branch transformer |
| CN206558885U (en) * | 2017-03-14 | 2017-10-13 | 深圳市言达电气有限公司 | A kind of plug-in power power distribution cabinet |
| CN107332213A (en) * | 2017-07-18 | 2017-11-07 | 深圳市华星光电半导体显示技术有限公司 | Current foldback circuit |
-
2018
- 2018-05-24 CN CN201810507524.8A patent/CN108711839A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070236848A1 (en) * | 2006-03-30 | 2007-10-11 | Mayell Robert J | Method and apparatus for an in-rush current limiting circuit |
| CN102183734A (en) * | 2011-03-02 | 2011-09-14 | 深圳市科陆电子科技股份有限公司 | System for preventing unbalanced current of breaker in charging pile virtual load verification |
| CN104104063A (en) * | 2014-07-28 | 2014-10-15 | 鹰星精密工业（深圳）有限公司 | Flyback converter overcurrent protection achieving method for nonlinear circuit |
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Application publication date: 20181026 |