CN110492443A - 10kV switchgear secondary component real-time monitoring protective device - Google Patents
10kV switchgear secondary component real-time monitoring protective device Download PDFInfo
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- CN110492443A CN110492443A CN201910839189.6A CN201910839189A CN110492443A CN 110492443 A CN110492443 A CN 110492443A CN 201910839189 A CN201910839189 A CN 201910839189A CN 110492443 A CN110492443 A CN 110492443A
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- 230000001681 protective effect Effects 0.000 title claims abstract description 30
- 238000012544 monitoring process Methods 0.000 title claims abstract description 28
- 238000005259 measurement Methods 0.000 claims abstract description 28
- 238000004891 communication Methods 0.000 claims abstract description 9
- 230000007246 mechanism Effects 0.000 abstract description 6
- 230000009471 action Effects 0.000 abstract description 5
- 230000002159 abnormal effect Effects 0.000 abstract description 4
- 230000008030 elimination Effects 0.000 abstract description 4
- 238000003379 elimination reaction Methods 0.000 abstract description 4
- 230000007257 malfunction Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 208000033748 Device issues Diseases 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- 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
- H02H7/222—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 for switches
-
- 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
- H02H7/222—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 for switches
- H02H7/224—Anti-pump circuits
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- Keying Circuit Devices (AREA)
Abstract
The invention discloses a kind of 10kV switchgear secondary component real-time monitoring protective devices, including CPU, closed loop Hall sensor, volt-ampere resistance measurement unit, exit relay, LCD screen, keyboard, communication interface and power module；The closed loop Hall sensor is used to measure the DC current size in circuit；The volt-ampere resistance measurement unit is used for measuring coil resistance；The CPU is electrically connected in the closed loop Hall sensor, volt-ampere resistance measurement unit, exit relay, LCD screen, keyboard and communication interface；The power module is for powering.The 10kV switchgear secondary component real-time monitoring protective device optimizes secondary circuit framework, avoids excessive dependence of the circuit to limit switch contact, reduces coil class component probability of damage；Accelerate malfunction elimination speed.As long as the device action, it can specify that switch over travel make and break contact is adhered or to switch abnormal or circuit breaker operation mechanism stuck.
Description
Technical field
The invention belongs to power safety technique fields more particularly to a kind of 10kV switchgear secondary component real-time monitoring to protect
Device.
Background technique
In the power system, the perfect basis for being equipment normal operating and protective device correctly acts of secondary circuit,
And component is intact, is basic.For the integrity of secondary circuit, can correctly and without falling off be guaranteed by wiring, but
Component is difficult to ensure in the integrity of normal operation.It is wherein simple in the secondary circuit framework of 10kV switchgear, reliably
Property it is low, component damage high frequency occurs, related auxiliary contact especially in switching mechanism.And divide-shut brake circuit concatenates switch at present
Stroke auxiliary contact disconnects divide-shut brake circuit by these contacts after switching divide-shut brake in place.Once these contact cards
It is puckery, be adhered will lead to divide-shut brake coil it is long when heating power, finally make coil burnout, switch will be unable to normal division.Equally, In
In tank circuit, energy storage motor also often because energy storage stroke auxiliary contact bite, be adhered due to be electrified for a long time heating burnout.For 10kV
Auxiliary circuits in cabinet framework is simple, easily causes divide-shut brake coil and energy storage motor to be electrified for a long time fever after component damage
Problem need to take certain measure to rectify and improve 10kV auxiliary circuits in cabinet framework, avoid because of auxiliary contact bite, be adhered and make
It is damaged at coil class component.Currently, most of switchgear producer is increased back more by concatenating related stroke contact the former circuit
The cut-off point on road, to improve the protection to coil and motor.
By taking above-mentioned measure to rectify and improve circuit, circuit will be caused to become more to limit switch contact demand, it is spare
Contact is reduced, it is meant that wherein certain contact damage may need to change entire travel switch, increase defect elimination workload.In addition, if because
When switching mechanism bite causes travel switch not in place, all contact states will not all change on travel switch, can also lead
Circuit is caused to be electrified for a long time heating burnout coil and motor.
Summary of the invention
In view of the above problems, secondary to optimize by researching and developing a kind of 10kV switchgear secondary component real-time monitoring protective device
Circuit framework avoids excessive dependence of the circuit to limit switch contact, reduces coil class component probability of damage.
To achieve this purpose, the present invention adopts the following technical scheme:
10kV switchgear secondary component real-time monitoring protective device, including CPU, closed loop Hall sensor, volt-ampere resistance
Measuring unit, exit relay, LCD screen, keyboard, communication interface and power module；
The closed loop Hall sensor is used to measure the DC current size in circuit；
The volt-ampere resistance measurement unit is used for measuring coil resistance；
The CPU be electrically connected in the closed loop Hall sensor, volt-ampere resistance measurement unit, exit relay,
LCD screen, keyboard and communication interface；
The power module is for powering.
Optionally, 10kV switchgear secondary component real-time monitoring protective device further includes two A/D modules；
The closed loop Hall sensor, volt-ampere resistance measurement unit pass through the A/D module and the CPU respectively
Connection.
Optionally, 10kV switchgear secondary component real-time monitoring protective device further includes amplifying circuit；
The closed loop Hall sensor is connected to the input terminal of the amplifying circuit, and the output end of the amplifying circuit connects
It is connected to A/D module.
Optionally, the volt-ampere resistance measurement unit includes voltage signal acquisition unit and direct current controllable constant-current source；
The source-series both ends in coil of direct current controllable constant-current；The voltage signal acquisition unit is side by side the two of coil
End；
The output end of the voltage signal acquisition unit is connected to A/D module；
Direct current controllable constant-current source is connected to the CPU.
Optionally, 10kV switchgear secondary component real-time monitoring protective device further includes alarm element, the alarm element
It is connected to the CPU.
Compared with prior art, the embodiment of the present invention has the advantages that
A kind of 10kV switchgear secondary component real-time monitoring protective device provided in an embodiment of the present invention, optimizes secondary returning
Road framework avoids excessive dependence of the circuit to limit switch contact, reduces coil class component probability of damage；Accelerate malfunction elimination
Speed can specify switch over travel make and break contact and be adhered or switch abnormal or circuit breaker operation mechanism as long as the device action
It is stuck.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other attached drawings according to these attached drawings.
Structure depicted in this specification, ratio, size etc., only to cooperate the revealed content of specification, for
Those skilled in the art understands and reads, and is not intended to limit the invention enforceable qualifications, therefore does not have technical
Essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing the function of the invention that can be generated
Under effect and the purpose that can reach, should all still it fall in the range of disclosed technology contents obtain and can cover.
Fig. 1 is the structure chart of 10kV switchgear secondary component real-time monitoring protective device provided in an embodiment of the present invention.
Fig. 2 is the measurement structure figure of closed loop Hall sensor provided in an embodiment of the present invention.
Fig. 3 is the measurement structure figure of volt-ampere resistance measurement unit provided in an embodiment of the present invention.
Fig. 4 is a kind of control program flow diagram provided in an embodiment of the present invention.
Fig. 5 is a kind of control logic figure provided in an embodiment of the present invention.
Fig. 6 is a kind of electrical schematic diagram provided in an embodiment of the present invention.
Specific embodiment
To enable the purpose of the present invention, feature, advantage more obvious and understandable, implement below in conjunction with the present invention
Attached drawing in example, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that reality disclosed below
Applying example is only a part of the embodiment of the present invention, and not all embodiment.Based on the embodiments of the present invention, this field is common
Technical staff's all other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Shown in please referring to Fig.1 to Fig.3, a kind of 10kV switchgear secondary component real-time monitoring protection dress is present embodiments provided
It sets, including CPU13, closed loop Hall sensor 10, volt-ampere resistance measurement unit 11, exit relay 12, LCD screen 15, keyboard
16, communication interface 17 and power module 14.
The closed loop Hall sensor 10 is used to measure the DC current size in circuit.Specifically, closed loop Hall passes
Sensor can measure between the electric current of random waveform, main and sub-coil that absolute electrical isolation, electric measurement range is wide, the response time is short,
It can be applied in DA current measurement.
The volt-ampere resistance measurement unit 11 is used for measuring coil resistance.
The CPU13 be electrically connected in the closed loop Hall sensor 10, volt-ampere resistance measurement unit 11, outlet after
Electric appliance 12, LCD screen 15, keyboard 16 and communication interface 17.
The power module 14 is for powering.
10kV switchgear secondary component real-time monitoring protective device further includes two A/D modules.
The closed loop Hall sensor 10, volt-ampere resistance measurement unit 11 pass through an A/D module and institute respectively
State CPU13 connection.
10kV switchgear secondary component real-time monitoring protective device further includes amplifying circuit 18.
The closed loop Hall sensor 10 is connected to the input terminal of the amplifying circuit 18, the amplifying circuit 18 it is defeated
Outlet is connected to A/D module.
The volt-ampere resistance measurement unit 11 includes voltage signal acquisition unit 19 and direct current controllable constant-current source 20.
Direct current controllable constant-current source 20 is connected on the both ends of coil；The voltage signal acquisition unit 19 is side by side in coil
Both ends.
The output end of the voltage signal acquisition unit 19 is connected to A/D module.
Direct current controllable constant-current source 20 is connected to the CPU13.
In volt-ampere resistance measurement unit 11, measurement voltage is provided by voltage signal acquisition unit 19, after A/D is converted, with
The magnitude of current that direct current controllable constant-current source 20 provides participates in CPU13 together and calculates (R=U/I), reaches and monitors in real time to coil resistance.
CPU13 throw to volt-ampere resistance measurement unit 11 and be moved back by control CK contact.
10kV switchgear secondary component real-time monitoring protective device further includes alarm element, and the alarm element is connected to institute
State CPU13.
It please refers to shown in fig. 4 to fig. 6.
The present embodiment additionally provides a kind of control program flow diagram of above-mentioned protective device.
Specifically, main program by fixed periodic response external interrupt, carry out in the interrupt service program analog quantity sampling,
Device hardware check, logic judgment, real-time resistance value etc. calculate.According to whether meeting entry condition and entering export procedure or normal
Run program.
The self-test that program carries out device is operated normally, alarm signal is sent out when device is abnormal, operation maintenance personnel is reminded to notify class
Group personnel carry out respective handling.Algorithm calculating is carried out in export procedure, logic judgment triggers exit relay in the condition that meets
12 movements.
Starting element process:
When string closed loop Hall sensor 10 in the loop senses that electric current, the magnitude of current calculate after the conversion of A/D module,
When reaching starting definite value, determine into export procedure.
Action element process:
After starting element starting, exits resistance measurement and through certain time-delay, trigger exit relay 12 and act, will persistently have
Road disconnection is flowed back to, and starts alarm element.
Alert element process:
When action element movement or resistance value reach critical value, alarm element movement, i.e. response alarm.
Therefore, the 10kV switchgear secondary component real-time monitoring protective device function realization principle are as follows:
When point (conjunction) lock wire loop has stream, closed loop Hall sensor 10 measures the size of electric current.When electric current is greater than
When having stream initiation value, which starts timing, while the device disconnects contact CK, exits resistance measurement unit, avoids big electricity
Stream flows through a volt-ampere resistance measurement unit 11 for a long time, to avoid damaging.If switch over travel make and break contact is adhered or switches different
Often or circuit breaker operation mechanism is stuck, at this time because in protective device self-holding circuit electric current can not voluntarily disconnect, when electric current is held
When the continuous time reaches the setup time setting valve, device exit relay 12CK1 (CK2) movement is triggered, keeps it corresponding normally closed
Contact CK1 (CK2) is disconnected, and disconnects point (conjunction) circuit, is returned to self-holding circuit in protective device, is avoided point (conjunction) brake cable circle long
Phase heating power is burnt, and monitoring backstage will be sent in corresponding alarm signal by device communication interface 17.
In conclusion 10kV switchgear secondary component real-time monitoring protective device provided in this embodiment is with following excellent
Point:
(1) 10kV switchgear divide-shut brake original circuit is to disconnect circuit afterwards in place by switch over travel, is that physics judges principle.
10kV switchgear secondary component real-time monitoring protective device increases electrical judgement on this basis, avoids divide-shut brake circuit pair
The excessive dependence of switch over travel.
(2) introducing of 10kV switchgear secondary component real-time monitoring protective device, accelerates malfunction elimination speed.As long as should
Device action, then can specify that switch over travel make and break contact is adhered or to switch abnormal or circuit breaker operation mechanism stuck.
(3) real time resistance in 10kV switchgear secondary component real-time monitoring protective device measures function, can ensure that coil
Resistance value is monitored.When coil resistance reaches its critical value, device issues corresponding alarm signal, and (resistance is low or resistance
It is high), cause operation maintenance personnel note that notifying that maintenance teams and groups are replaced in time, avoids coil resistance too low, division brake current is big,
It burns out protective device operation panel or coil resistance is excessively high, division brake current is small, and coil the suction-combining force is insufficient, leads to switch failure.
(4) 10kV switchgear secondary component real-time monitoring protective device is realized by electronic component integration, and electronic component has
There are small in size, high reliablity, fast response time, high-precision.
Here, using specialized vocabulary only for describing the purpose of specific example embodiment, and not mean to limit
Purpose.Unless context clearly makes opposite expression, singular " one (a) " as used herein, " one (an) "
" being somebody's turn to do (the) " can mean also to include plural form.Term " including (comprises) ", " including (comprising) ",
" including (including) " and it is included in the interior meaning " with (having) ", and therefore specifies and there is stated spy
Sign, entirety, step, operation, element and/or component, but do not exclude the presence of or extraly have other spies of one or more
Sign, entirety, step, operation, element, component and/or combination thereof.Unless explicitly indicated the order executed, it is described herein
This method step, handling and operation are not interpreted as centainly needing to execute according to the specific order discussed and shown.Should also
Understand, it can be using additional or selectable step.
When element or layer be known as " ... on ", " with ... engage ", " being connected to " or " being connected to " another
Element or layer can be and engage, be connected to or couple directly on another element or layer, with another element or layer
To another element or layer, there may also be intervenient element or layers.In contrast, when element or layer are known as " straight
On connecing ... ", " with ... directly engage ", " being directly connected to " or " being directly coupled to " another element or layer, then may be used
Intervenient element or layer can be not present.Other words for being used to describe element relation should explain (example in a similar way
Such as, " ... between " and " between directly existing ... ", " adjacent " and " direct neighbor " etc.).Term "and/or" as used herein
Any and all combination of one or more including associated the enumerated project.Although may have been used art herein
Language first, second, third, etc. to describe various elements, component, regions, layers, and/or portions, these elements, component, region,
Layer and/or part are not limited by these terms.These terms can be served only for an element, component, region or part
It is distinguished with another element, component, region or part.Unless clearly showed that by context, herein using such as term " the
One ", the term of " second " and other numerical value is it is not intended that sequence or order.Therefore, lower section discuss first element, component,
Region, layer or part can be implemented using second element, component, region, layer or partial term without departing from the example
The introduction of example.
The relative terms in space, such as "inner", "outside", " below ", " ... lower section ", " lower part ", " top ",
" top " etc. can use herein for convenient for the purpose of description, to describe an element or feature as illustrated in the drawing and another
Relationship between outer one or more element or feature.The relative terms in space can mean the orientation comprising describing except the figure
Except the device different orientations.For example, if overturn the device in the figure, then it is described as " in other elements or feature
Element of the lower section " either " below element or feature " will be oriented to " in the top of other elements or feature ".Therefore,
Exemplary term " ... lower section " may include upwardly and downwardly two kinds orientations.The device can be otherwise orientated
It (be rotated by 90 ° or other are orientated) and is explained with the opposite description in space herein.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although referring to before
Stating embodiment, invention is explained in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (5)
1.10kV switchgear secondary component real-time monitoring protective device, which is characterized in that including CPU, closed loop Hall sensor,
Volt-ampere resistance measurement unit, exit relay, LCD screen, keyboard, communication interface and power module；
The closed loop Hall sensor is used to measure the DC current size in circuit；
The volt-ampere resistance measurement unit is used for measuring coil resistance；
The CPU is electrically connected in the closed loop Hall sensor, volt-ampere resistance measurement unit, exit relay, LCD
Screen, keyboard and communication interface；
The power module is for powering.
2. 10kV switchgear secondary component real-time monitoring protective device according to claim 1, which is characterized in that further include
Two A/D modules；
The closed loop Hall sensor, volt-ampere resistance measurement unit pass through the A/D module respectively and the CPU connects
It connects.
3. 10kV switchgear secondary component real-time monitoring protective device according to claim 2, which is characterized in that further include
Amplifying circuit；
The closed loop Hall sensor is connected to the input terminal of the amplifying circuit, and the output end of the amplifying circuit is connected to
A/D module.
4. 10kV switchgear secondary component real-time monitoring protective device according to claim 3, which is characterized in that the volt
Pacifying resistance measurement unit includes voltage signal acquisition unit and direct current controllable constant-current source；
The source-series both ends in coil of direct current controllable constant-current；The voltage signal acquisition unit is side by side at the both ends of coil；
The output end of the voltage signal acquisition unit is connected to A/D module；
Direct current controllable constant-current source is connected to the CPU.
5. 10kV switchgear secondary component real-time monitoring protective device according to claim 4, which is characterized in that further include
Element is alerted, the alarm element is connected to the CPU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910839189.6A CN110492443A (en) | 2019-09-05 | 2019-09-05 | 10kV switchgear secondary component real-time monitoring protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910839189.6A CN110492443A (en) | 2019-09-05 | 2019-09-05 | 10kV switchgear secondary component real-time monitoring protective device |
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| Publication Number | Publication Date |
|---|---|
| CN110492443A true CN110492443A (en) | 2019-11-22 |
Family
ID=68556746
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|---|---|---|---|
| CN201910839189.6A Pending CN110492443A (en) | 2019-09-05 | 2019-09-05 | 10kV switchgear secondary component real-time monitoring protective device |
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