CN107170641A - A kind of vacuum detecting method of vacuum interrupter - Google Patents
A kind of vacuum detecting method of vacuum interrupter Download PDFInfo
- Publication number
- CN107170641A CN107170641A CN201710619106.3A CN201710619106A CN107170641A CN 107170641 A CN107170641 A CN 107170641A CN 201710619106 A CN201710619106 A CN 201710619106A CN 107170641 A CN107170641 A CN 107170641A
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- CN
- China
- Prior art keywords
- vacuum
- electric field
- interrupter
- metallic shield
- controller
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/668—Means for obtaining or monitoring the vacuum
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- Measuring Fluid Pressure (AREA)
Abstract
The present invention proposes a kind of vacuum detecting method of vacuum interrupter, comprises the following steps：Metallic shield is set in the shell of vacuum circuit breaker, and vacuum interrupter, the vacuum cavity that vacuum interrupter is connected by vacuum tube is fully sealed in the metal part of metallic shield, and vacuum cavity is arranged at the outside of vacuum interrupter and in metallic shield；Electromagnetic sensor is set inside vacuum cavity, and electromagnetic sensor connects controller by transmission line；The outside of metallic shield sets electric field probe, electric field probe connection controller；Magnetic field intensity in electromagnetic sensor detection vacuum cavity, detectable signal input controller；Electric field signal outside electric field probe detection metal tank, controller receives the detectable signal of electric field probe, and electric field signal is changed into magnetic field signal；Controller compares two groups of Field signal values, and the vacuum to vacuum interrupter carries out on-line checking.The present invention is mixed by electric field, magnetic field, and inside and outside common detection vacuum, the degree of accuracy is high.
Description
Technical field
The present invention relates to a kind of vacuum detecting method of vacuum interrupter.
Background technology
Vacuum declines in vacuum extinction room, then house vacuum dielectric level is reduced, and commutation failure will be caused when serious.I
National standard is provided, for the vacuum circuit breaker of 3.6-40.5kv voltage class, and the maximum that vacuum allows is about 1.33x10- 2Pa.Simultaneously as vacuum leak process is very slow, elapsed-time standards is likely to be breached some months, and vacuum leak is often difficult by people
Discover.When vacuum drops to critical value, vacuum interrupter enters sub- vacuum state, to electrical equipment and surrounding environment
Safety causes serious threat.
By to vacuum degree measurement, can just send alarm signal before vacuum drops to critical value, operation is notified
Person fixes a breakdown equipment in advance, eliminates safe hidden trouble.
The detection for vacuum mainly includes at present, periodic detection, i.e., by special vacuum inspective meter to vacuum
The vacuum of arc-chutes is regularly detected, but which needs to separate vacuum interrupter from switch, simultaneously because two
Phase is needed between secondary detection at regular intervals, so, there is the risk for sub- vacuum occur.Stop transport and detect, i.e., in overhaul of the equipments
When, by industrial frequency withstand voltage, the parameter such as high-frequency discharge, high frequency electric, magnetic charging is measured to vacuum, although it is without inciting somebody to action
Vacuum interrupter is separated from switch, but still presence can not detect vacuum in real time, it is difficult to which real prevention vacuum deterioration is led
The outage contingencies of cause.On-line checking, detects vacuum in real time, can really prevent the outage contingencies of vacuum switch.For online
Detection divides " directly detecting " and " indirect detection " again, and " directly being detected " pressure gauge is accessed i.e. in vacuum interrupter or vacuum is passed
Sensor, but because the hyperbaric environment of vacuum interrupter to sensor, it is necessary to isolate, technical sophistication high into production cost."
Connect detection " it is mainly based upon caused by vacuum interrupter deterioration between radome electric field change, conducting rod and metallic shield
Discharge pulse current change etc. mode, but aforesaid way exist can not accurately measure, by external interference it is serious the shortcomings of and nothing
Method obtains practical application.
The content of the invention
The present invention proposes a kind of vacuum detecting method of vacuum interrupter, and outside in vacuum valve sets a vacuum chamber
Body, both are connected by vacuum tube so that both vacuums are consistent, and electromagnetic sensor is arranged in vacuum cavity, now may be used
To be prevented effectively from interference, the vacuum in arc-chutes also can be accurately calculated.
The technical proposal of the invention is realized in this way：
A kind of vacuum detecting method of vacuum interrupter, comprises the following steps：
Step one, metallic shield 6 is set in the shell of vacuum circuit breaker, the metal part of metallic shield 6 is completely close
Vacuum interrupter 1 is sealed, the vacuum cavity 3 that vacuum interrupter 1 is connected by vacuum tube 2, the vacuum cavity 3 is arranged at vacuum and gone out
The outside of arc chamber and in the metallic shield 6；The inside of vacuum cavity 3 sets electromagnetic sensor 4, the electromagnetic sensor
4 connect controller 7 by transmission line；The outside of metallic shield 6 sets electric field probe 5, and the electric field probe 5 connects controller
7；
Magnetic field intensity in step 2, the detection vacuum cavity 3 of electromagnetic sensor 4, detectable signal input controller 7；
Electric field signal outside step 3, the detection metal of electric field probe 5 tank 6, controller 7 receives the spy of electric field probe 5
Signal is surveyed, and electric field signal is changed into magnetic field signal；
Step 4, controller 7 compares two groups of Field signal values, and the vacuum to vacuum interrupter carries out on-line checking.
Preferably, the signal value of electric field probe 5 is proportional with vacuum in vacuum interrupter 1, and vacuum is higher, electric field
Signal value is higher；Conversely, vacuum is lower, electric field signal value is lower.
Preferably, the vacuum circuit breaker sets three-phase, and is directed to the knot that each phase sets identical metallic shield respectively
Structure.
What the present invention was produced has the beneficial effect that：The present invention is mixed by electric field, magnetic field, inside and outside common detection vacuum.Electricity
It is also the presence of mutually conversion ratio between field and magnetic field, this kind conversion ratio is in the absence of by external interference, by measuring electricity
Be then converted to magnetic field, thus the intensity comprehensive descision vacuum by two electromagnetic waves deterioration (according to the distribution of electromagnetic field,
The transformational relation between electromagnetic field can be calculated).Compared to being detected or magnetic field detection using electric field completely, this detection scheme is accurate
Exactness is higher.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is detection method schematic diagram of the invention.
Embodiment
Below in conjunction with 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
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
A kind of vacuum detecting method of vacuum interrupter as shown in Figure 1, comprises the following steps：
Step one, metallic shield 6 is set in the shell of vacuum circuit breaker, the metal part of metallic shield 6 is completely close
Vacuum interrupter 1 is sealed, the vacuum cavity 3 that vacuum interrupter 1 is connected by vacuum tube 2, the vacuum cavity 3 is arranged at vacuum and gone out
The outside of arc chamber and in the metallic shield 6；The inside of vacuum cavity 3 sets electromagnetic sensor 4, the electromagnetic sensor
4 connect controller 7 by transmission line；The outside of metallic shield 6 sets electric field probe 5, and the electric field probe 5 connects controller
7；
Magnetic field intensity in step 2, the detection vacuum cavity 3 of electromagnetic sensor 4, detectable signal input controller 7；
Electric field signal outside step 3, the detection metal of electric field probe 5 tank 6, controller 7 receives the spy of electric field probe 5
Signal is surveyed, and electric field signal is changed into magnetic field signal；
Step 4, controller 7 compares two groups of Field signal values, and the vacuum to vacuum interrupter carries out on-line checking.
Preferably, the signal value of electric field probe 5 is proportional with vacuum in vacuum interrupter 1, and vacuum is higher, electric field
Signal value is higher；Conversely, vacuum is lower, electric field signal value is lower.
Preferably, the vacuum circuit breaker sets three-phase, and is directed to the knot that each phase sets identical metallic shield respectively
Structure.
External electrical field is detected using electric field probe in the present embodiment, electric field is by changing into the degree of accuracy of vacuum than extraneous
The degree of accuracy of magnetic field detection is high.It is simultaneously internal that the vacuum cavity 3 connected with arc-chutes is set so that both vacuum is consistent,
And detection magnetic field intensity, the requirement of the installation environment of one side reduction electromagnetic sensor 4 in vacuum cavity 3, another aspect is also
Interference can be effectively avoided, the signal of electromagnetic sensor detection is more accurately expressed.
During the signal from electric field probe 5 that controller 7 receives, when the vacuum in arc-chutes is normal, it is only necessary to hundreds of V
Voltage can maintain the electronic current as caused by field emission between band electrical contact and intershield cover, radome accumulation it is negative
Electric charge makes its negative potential nearly reach electrode voltage peak value.When vacuum is deteriorated in arc-chutes, the gas density in arc-chutes
Become big, the electronics of field emission turns into anion after being adsorbed by gas molecule.Because anion quality is big, drift velocity is slow, makes
Obtain above-mentioned electronic current to reduce, the reduction of radome absolute value current potential.When vacuum deterioration is atmospheric pressure in arc-chutes, field is caused
Launching electronics are all adsorbed as anion by gas molecule.Therefore, arc-chutes can be deduced by the change procedure of Shielding tensor
The deterioration process of interior vacuum, compared to being changed into after using the signal outside magnet field probe detection, electric field probe collection signal
Its accuracy of corresponding magnet field probe is higher.
Mixed in this programme by electric field, magnetic field, the data drawn are changed into identical by inside and outside common detection vacuum
Data are compared analysis, and then obtain the vacuum degree measurement result of high accuracy and (do not make detailed retouch in specific this programme
State, including but not limited to CN104854676A comparison scheme) compared with such scheme, the probe data of this programme collection is compared with it
The data of inside and outside portion's antenna are more accurate, and service life is longer, to electromagnetic sensor to install and use condition looser.This
Invention also has the system that multi-parameter detects function, while vacuum, the degree of wear of contact, radome capacitance etc. are detected,
These data are supplied to each parameter prestored in control system, control system comparison database and vacuum interrupter electric life
These sampling parameters are integrated, analyzed, by multi-group data by correlation using neutral net or other fuzzy algorithmic approaches etc.
Analysis, fits the correlation curve between algorithms of different, and finds out match point preferred on the curve by experiment, to vacuum
The residual life of arc-chutes is predicted, carries out early warning to failure.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (3)
1. a kind of vacuum detecting method of vacuum interrupter, it is characterised in that comprise the following steps：
Step one, metallic shield (6) is set in the shell of vacuum circuit breaker, the metal part of metallic shield (6) is completely close
Vacuum interrupter (1) is sealed, the vacuum cavity (3) that vacuum interrupter (1) is connected by vacuum tube (2), the vacuum cavity (3) sets
It is placed in the outside of vacuum interrupter and in metallic shield (6)；Electromagnetic sensor is set inside the vacuum cavity (3)
(4), the electromagnetic sensor (4) connects controller (7) by transmission line；The outside of metallic shield (6) sets electric field probe
(5), electric field probe (5) the connection controller (7)；
Magnetic field intensity in step 2, electromagnetic sensor (4) detection vacuum cavity (3), detectable signal input controller (7)；
Step 3, the outside electric field signal of electric field probe (5) detection metal tank (6), controller (7) receives electric field probe (5)
Detectable signal, and electric field signal is changed into magnetic field signal；
Step 4, controller (7) compares two groups of Field signal values, and the vacuum to vacuum interrupter carries out on-line checking.
2. a kind of vacuum detecting method of vacuum interrupter as claimed in claim 1, it is characterised in that electric field probe (5)
Signal value it is proportional with vacuum in vacuum interrupter (1), vacuum is higher, and electric field signal value is higher；Conversely, vacuum
Lower, electric field signal value is lower.
3. a kind of vacuum detecting method of vacuum interrupter as claimed in claim 1, it is characterised in that the vacuum circuit breaker
Device sets three-phase, and is directed to the structure that each phase sets identical metallic shield respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710619106.3A CN107170641A (en) | 2017-07-26 | 2017-07-26 | A kind of vacuum detecting method of vacuum interrupter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710619106.3A CN107170641A (en) | 2017-07-26 | 2017-07-26 | A kind of vacuum detecting method of vacuum interrupter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107170641A true CN107170641A (en) | 2017-09-15 |
Family
ID=59817437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710619106.3A Pending CN107170641A (en) | 2017-07-26 | 2017-07-26 | A kind of vacuum detecting method of vacuum interrupter |
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| Country | Link |
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| CN (1) | CN107170641A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113707494A (en) * | 2021-09-09 | 2021-11-26 | 西安交通大学 | Vacuum degree detection device with vacuum arc-extinguishing chamber embedded electrode and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103606483A (en) * | 2013-11-23 | 2014-02-26 | 浙江紫光电器有限公司 | Vacuum degree monitoring device for high voltage vacuum circuit breaker arc extinguish chamber |
| CN103646819A (en) * | 2013-12-13 | 2014-03-19 | 成都旭顺电子有限责任公司 | Vacuum switch vacuum degree on-line monitoring system |
| CN103996564A (en) * | 2014-04-22 | 2014-08-20 | 江苏森博传感技术有限公司 | Vacuum arc-extinguishing chamber internally installed with miniature wireless passive vacuum sensor |
| CN104854676A (en) * | 2012-12-12 | 2015-08-19 | 三菱电机株式会社 | Vacuum deterioration monitoring apparatus |
-
2017
- 2017-07-26 CN CN201710619106.3A patent/CN107170641A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104854676A (en) * | 2012-12-12 | 2015-08-19 | 三菱电机株式会社 | Vacuum deterioration monitoring apparatus |
| CN103606483A (en) * | 2013-11-23 | 2014-02-26 | 浙江紫光电器有限公司 | Vacuum degree monitoring device for high voltage vacuum circuit breaker arc extinguish chamber |
| CN103646819A (en) * | 2013-12-13 | 2014-03-19 | 成都旭顺电子有限责任公司 | Vacuum switch vacuum degree on-line monitoring system |
| CN103996564A (en) * | 2014-04-22 | 2014-08-20 | 江苏森博传感技术有限公司 | Vacuum arc-extinguishing chamber internally installed with miniature wireless passive vacuum sensor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113707494A (en) * | 2021-09-09 | 2021-11-26 | 西安交通大学 | Vacuum degree detection device with vacuum arc-extinguishing chamber embedded electrode and method |
| CN113707494B (en) * | 2021-09-09 | 2022-06-21 | 西安交通大学 | Vacuum degree detection device with vacuum arc-extinguishing chamber embedded electrode and method |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170915 |
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| RJ01 | Rejection of invention patent application after publication |