CN207051394U - A kind of generator stator bar end surface current potential contactless measuring system - Google Patents
A kind of generator stator bar end surface current potential contactless measuring system Download PDFInfo
- Publication number
- CN207051394U CN207051394U CN201721021408.2U CN201721021408U CN207051394U CN 207051394 U CN207051394 U CN 207051394U CN 201721021408 U CN201721021408 U CN 201721021408U CN 207051394 U CN207051394 U CN 207051394U
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- China
- Prior art keywords
- guide rail
- bar
- current potential
- end surface
- measuring system
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- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The utility model discloses a kind of generator stator bar end surface current potential contactless measuring system, including the bar being arranged in camera bellows and measurement module, the bar is connected with alternating-current voltage source, there is measurement apparatus guide rail along the bar direction is horizontally disposed, the measurement module is arranged on the measurement apparatus guide rail, measurement module is connected with oscillograph, negative dc voltage source, temperature controller and the guide rail dragging motor control box being arranged on outside the camera bellows respectively, for carrying out electroluminescent ionization meter and temperature survey to the bar.What it is using cordless collection is optical signal, and the distribution of current potential will not be had an impact under power frequency electric field frequency, so as to obtain the very high Potential distribution information of accuracy.
Description
Technical field
The utility model belongs to technical field of electricity, and in particular to a kind of generator stator bar end surface current potential is non-to be connect
Touch measuring system.
Background technology
With the rated voltage more and more higher of China's extreme misery group of motors, generator stator bar and the anti-corona system of winding overhang
Effect it is increasing.And the major function of generator stator bar surface anti-halo layer is to homogenize the electric field of bar end surface
Distribution, because local electric field strength is too high corona discharge occurs for bar end when preventing from applying voltage.In actual set design,
If bar end surface is without anti-corona system, because major insulation surface resistivity is too high, bar surface potential is close to iron core or low
Current potential near resistive layer will reduce rapidly, and then cause bar end high local field strength occur, will cause bar end
The corona discharge phenomenon on surface.The method that recent decades use in the industry for：By carrying out anti-corona handle to change to bar end
The resistivity of end surface, so that current potential even variation along the anti-corona processing region in whole end, reduces local electric field strength
And prevent the generation of corona discharge.Because there is carborundum (SiC) special nonlinear resistance property (ought put on material
During electric-field intensity increase, its resistivity can decline), at present mainly using SiC as main Anti-Corona Material.Due to its uniqueness
Resistance characteristic, its painting/bag can effectively be contained into the generation of surface part high field intensity in generator stator bar end in the industry, prevented
The only generation of corona discharge.
In order to verify the reasonability of generator stator bar anti-corona structure, it is necessary to obtain bar end by test method measurement
The distribution situation of portion's current potential.Current existing Potential distribution measuring method mainly has ball gap method, electrostatic voltmeter method and penalty method,
These methods are required for placing thin copper ring electrode on bar surface.And due to the introducing of metal electrode, necessarily cause local field strength
The distortion being distributed with surface potential, therefore above-mentioned several method generally existing measurement error is big for a long time, measuring accuracy is low etc.
Defect.
Utility model content
Technical problem to be solved in the utility model is to be directed to above-mentioned deficiency of the prior art, there is provided one kind generates electricity
Machine stator bar end surface current potential contactless measuring system, solves in the prior art due to the introducing of metal electrode, leads
Cause the problem of distortion of local field strength and surface potential distribution.
The utility model uses following technical scheme：
A kind of generator stator bar end surface current potential contactless measuring system, including the bar being arranged in camera bellows
And measurement module, the bar are connected with alternating-current voltage source, there is measurement apparatus guide rail along the bar direction is horizontally disposed, it is described
Measurement module is arranged on the measurement apparatus guide rail, the measurement module respectively be arranged on outside the camera bellows oscillograph,
Negative dc voltage source, temperature controller and the connection of guide rail dragging motor control box, for carrying out electroluminescent intensity to the bar
Measurement and temperature survey.
Further, electrode is coated with the groove portion low-resistance corona-prevention layer of the bar, electrode is by the first ground connection exit
Sub- grounding connection.
Further, major insulation and groove portion low-resistance corona-prevention are respectively arranged between the bar and the electrode, described
Groove portion low-resistance corona-prevention to be provided at both ends with end anti-corona.
Further, the left and right ends of the bar are provided with voltage equalizing ball, and voltage equalizing ball described in one end connects by high-voltage line
Ac high-voltage exit is connected to, is connected by the ac high-voltage exit with the alternating-current voltage source.
Further, the measurement module includes photoelectric conversion module and infrared temperature measurement apparatus, the photoelectric conversion module
It is disposed side by side on infrared temperature measurement apparatus on guide rail dragging motor, the guide rail dragging motor is arranged on the measurement apparatus guide rail
On.
Further, straight down, being provided with the measurement window can for the measurement window of the photoelectric conversion module
The horn-like light receiving device of dismounting, the cross section of the light receiving device is rectangle.
Further, the distance of the opening and the bar of the light receiving device bottom is 5~105mm.
Further, the measurement apparatus guide rail is two parallel straight guides, and, the guide rail parallel with the bar
Dragging motor is arranged between two straight guides, and the guide rail dragging motor drags by high pressure spring wire and guide rail successively
Motor leading-out terminal is connected with the guide rail dragging motor control box being arranged on outside camera bellows, for adjusting the position of measurement module during experiment
Put.
Further, the photoelectric conversion module is respectively by high pressure spring wire connection photoelectric conversion module signal exit
Son and negative dc voltage source leading-out terminal, for connecting oscillograph and the negative dc voltage source respectively；The infrared measurement of temperature dress
Put and be connected by high pressure spring wire and temperature measuring equipment leading-out terminal with the temperature controller.
Further, the camera bellows is made up of nontransparent insulating materials.
Compared with prior art, the utility model at least has the advantages that：
The utility model generator stator bar end surface current potential contactless measuring system, including be arranged in camera bellows
Bar and measurement module, bar be connected with alternating-current voltage source, have measurement apparatus guide rail along bar direction is horizontally disposed, measure mould
Block is arranged on measurement apparatus guide rail, measurement module respectively be arranged on outside camera bellows oscillograph, negative dc voltage source and lead
Rail dragging motor control box connects, for carrying out electroluminescent ionization meter and temperature survey to bar, this contactless
In measuring system, because use cordless collection is optical signal, and current potential will not be divided under power frequency electric field frequency
Cloth has an impact, so as to obtain the very high Potential distribution information of accuracy.
Further, measurement module includes photoelectric conversion module and infrared temperature measurement apparatus, and infrared temperature sensor is using non-
Contact can monitor the luminous place's temperature change of bar in real time, and photoelectric conversion module uses photomultiplier PMT or single photon meter
Number device, has high sensitivity and ultrafast time response.
Further, horn-like light receiving device can effectively control electrooptical device collection bar electroluminescent at the trial
Luminous area, ensure that every time only measurement light receiving device institute to the luminous quantity of part, avoids the luminous of other parts from being mixed into measuring
As a result impact.The opening of the light receiving device bottom is adjustable with the vertical range of the bar and keeps in test solid
It is fixed, light receiving device is not directly contacted with bar, and do not produce electric discharge phenomena between light receiving device and bar.
Further, magazine is made up of nontransparent insulating materials.Camera bellows made of non-transparent material is it is possible to prevente effectively from outer
Portion's ambient light is mixed into be impacted to test result.During experiment, to sample apply ac high-voltage, camera bellows made of insulating materials and
Support is supported and fixes the position of bar, can isolate sample with ground, and avoiding sample, flashover is protected over the ground under high voltages, shield
The safety of testing crew, prevent bar Leakage Current from producing interference to experiment.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Brief description of the drawings
Fig. 1 is the utility model overall structure diagram；
Fig. 2 is the utility model measurement module structural representation.
Wherein：1. photoelectric conversion module；2. infrared temperature measurement apparatus；3. voltage equalizing ball；4. light receiving device；5. electrode；6. measurement dress
Put guide rail；7. guide rail dragging motor control box；8. camera bellows；9. the first ground connection exit；10. ac high-voltage exit；11. exchange
Voltage source；12. the second ground connection exit；13. photoelectric conversion module signal leading-out terminal；14. oscillograph；15. temperature measuring equipment draws
Go out terminal；16. negative dc voltage source leading-out terminal；17. negative dc voltage source；18. high pressure spring wire；19. high-voltage line；20. lead
Rail dragging motor；21. guide rail dragging motor leading-out terminal；22. bar；23. groove portion low-resistance corona-prevention；24. end is anti-corona；25. master
Insulation；26. temperature controller.
Embodiment
The utility model provides a kind of generator stator bar end surface current potential contactless measuring system, utilizes
Existing functional relation between SiC luminous intensity and residing electric-field intensity, SiC material is launched in itself under strong electric field for collection
The faint blue violet light gone out, then the royal purple optical signal of some strength is changed into certain amplitude and frequency by electrooptical device
The weak electric signal of rate, through oscillograph collection analysis, so as to obtain the information of Electric Field Distribution.Infrared temperature sensor is utilized simultaneously,
The temperature change of monitoring luminous site in real time.There are a dragging motor, electrooptical device and infrared temperature under straight guide rail
Sensor be fixed on dragging motor form one can far distance controlled measurement apparatus.Adjust between measurement apparatus and bar
Relative position, the electroluminescent intensity in bar and temperature can be carried out real by controlling dragging motor position outside camera bellows
When measure, so as to obtain the information of real-time Electric Field Distribution.
Referring to Fig. 1, the utility model generator stator bar end surface current potential contactless measuring system, including set
Bar 22 and measurement module in camera bellows 8 are put, the bar 22 is connected with alternating-current voltage source 11, along the direction water of bar 22
Flat to be provided with measurement apparatus guide rail 6, the measurement module is arranged on the measurement apparatus guide rail 6, the measurement module difference
With oscillograph 14, negative dc voltage source 17, temperature controller 26 and the guide rail dragging motor control box 7 being arranged on outside the camera bellows 8
Connection, for carrying out electroluminescent ionization meter and temperature survey to the bar 22.
Electrode 5 is coated with the groove portion low-resistance corona-prevention layer of bar 22, electrode 5 is grounded by the first ground connection leading-out terminal 9
Connection.
Major insulation 25 and groove portion low-resistance corona-prevention are respectively arranged between the both sides up and down of the bar 22 and the electrode 5
23, it is provided at both ends with end anti-corona 24 in the groove portion low-resistance corona-prevention 23.
The left and right ends of the bar 22 are provided with voltage equalizing ball 3, and voltage equalizing ball 3 described in one end is connected to by high-voltage line 19
Ac high-voltage exit 10, it is connected by the ac high-voltage exit 10 with the alternating-current voltage source 11.
Referring to Fig. 2, the measurement module includes photoelectric conversion module 1 and infrared temperature measurement apparatus 2, the opto-electronic conversion mould
Block 1 and infrared temperature measurement apparatus 2 are disposed side by side on guide rail dragging motor 20, and the guide rail dragging motor 20 is arranged on the measurement
On device guide rail 6.
The measurement window of the photoelectric conversion module 1 straight down, can measure bar 22 together with infrared temperature measurement apparatus 2
Electroluminescent intensity and temperature at same section, a horn-like light receiving device 4 is set at measurement window, ensured each
Only measurement light receiving device 4 to the luminous quantity of part, avoid luminous be mixed into of other parts from impacting measurement result.
The distance of the opening and the bar 22 of the bottom of light receiving device 4 is 5~105mm, and vertical range can be according to examination
Test voltage-regulation and keep fixing in test, light receiving device 4 is not directly contacted with bar 22, and between light receiving device 4 and bar 22 not
Produce electric discharge phenomena.
The measurement apparatus guide rail 6 is two parallel straight guides, and parallel with the bar 22 of lower section, the guide rail dragging
Motor 20 is arranged between two straight guides, and the guide rail dragging motor 20 drags by high pressure spring wire 18 and guide rail successively
Dynamic motor leading-out terminal 21 is connected with the guide rail dragging motor control box 7 being arranged on outside camera bellows 8, is used to adjust during experiment and is measured mould
The position of block.
The guide rail dragging motor 20 is drawn section 12 with the second ground connection by high pressure spring wire 18 and is connected.
The photoelectric conversion module 1 connects the He of photoelectric conversion module signal leading-out terminal 13 by high pressure spring wire 18 respectively
Negative dc voltage source leading-out terminal 16, pass through the photoelectric conversion module signal leading-out terminal 13 and negative dc voltage source exit
Son 16 is connected with the oscillograph 14 and negative dc voltage source 17 respectively；The infrared temperature measurement apparatus 2 is by high pressure spring wire 18
It is connected with temperature measuring equipment leading-out terminal 15 with the temperature controller 26；
Photoelectric conversion module 1 includes photomultiplier PMT or single photon counter, is led to through high-voltage line 19 outside camera bellows 8
Oscillograph 14 on, by oscillograph observation and acquisition and recording test data during experiment, according to SiC luminous intensity and residing electricity
Existing functional relation between field intensity, obtains Electric Field Distribution information.
The camera bellows 8 is rectangular parallelepiped structure, is made up of nontransparent insulating materials, and the top of camera bellows 8 has movably gently
Just upper plate, upper plate can be removed when sample is changed in adjustment, stator bar specimen 22 is positioned among camera bellows and by upper plate during experiment
Cover, you can form lighttight, complete darkness a test environment.
In this contactless measuring system, do not introduce metal electrode but optical signal is gathered by cordless and entered
And Electric Field Distribution information is obtained, the distribution of current potential will not be had an impact under power frequency electric field frequency, therefore obtained current potential point
Cloth information accuracy is very high.
Claims (10)
1. a kind of generator stator bar end surface current potential contactless measuring system, it is characterised in that dark including being arranged on
Bar (22) and measurement module in case (8), the bar (22) are connected with alternating-current voltage source (11), along the bar (22) side
There is measurement apparatus guide rail (6) to horizontally disposed, the measurement module is arranged on the measurement apparatus guide rail (6), the measurement
Module is respectively with being arranged on the outer oscillograph (14) of the camera bellows (8), negative dc voltage source (17), temperature controller (26) and guide rail
Dragging motor control box (7) connects, for carrying out electroluminescent ionization meter and temperature survey to the bar (22).
2. a kind of generator stator bar end surface current potential contactless measuring system according to claim 1, it is special
Sign is, electrode (5) is coated with the groove portion low-resistance corona-prevention layer of the bar (22), electrode (5) is by the first ground connection exit
Sub (9) grounding connection.
3. a kind of generator stator bar end surface current potential contactless measuring system according to claim 2, it is special
Sign is, major insulation (25) and groove portion low-resistance corona-prevention (23) are respectively arranged between the bar (22) and the electrode (5),
The groove portion low-resistance corona-prevention (23) to be provided at both ends with end anti-corona (24).
4. a kind of generator stator bar end surface current potential contactless measuring system according to claim 2, it is special
Sign is that the left and right ends of the bar (22) are provided with voltage equalizing ball (3), and voltage equalizing ball (3) passes through high-voltage line described in one end
(19) ac high-voltage exit (10) is connected to, is connected by the ac high-voltage exit (10) and the alternating-current voltage source (11)
Connect.
5. a kind of generator stator bar end surface current potential contactless measuring system according to claim 1, it is special
Sign is, the measurement module includes photoelectric conversion module (1) and infrared temperature measurement apparatus (2), the photoelectric conversion module (1) and
Infrared temperature measurement apparatus (2) is disposed side by side on guide rail dragging motor (20), and the guide rail dragging motor (20) is arranged on the survey
Measure on device guide rail (6).
6. a kind of generator stator bar end surface current potential contactless measuring system according to claim 5, it is special
Sign is that the measurement window of the photoelectric conversion module (1) straight down, is provided with the measurement window and removably fallen
Horn-like light receiving device (4), the cross section of the light receiving device (4) is rectangle.
7. a kind of generator stator bar end surface current potential contactless measuring system according to claim 6, it is special
Sign is that the opening of light receiving device (4) bottom and the distance of the bar (22) are 5~105mm.
8. a kind of generator stator bar end surface current potential contactless measuring system according to claim 5, it is special
Sign is that the measurement apparatus guide rail (6) is two parallel straight guides, and parallel with the bar (22), and the guide rail drags
Dynamic motor (20) is arranged between two straight guides, and the guide rail dragging motor (20) passes through high pressure spring wire (18) successively
It is connected with guide rail dragging motor leading-out terminal (21) with being arranged on the guide rail dragging motor control box (7) of camera bellows (8) outside, during experiment
For adjusting the position of measurement module.
9. a kind of generator stator bar end surface current potential contactless measuring system according to claim 5, it is special
Sign is that the photoelectric conversion module (1) is respectively by high pressure spring wire (18) connection photoelectric conversion module signal leading-out terminal
(13) and negative dc voltage source leading-out terminal (16), for connecting the oscillograph (14) and negative dc voltage source (17) respectively；
The infrared temperature measurement apparatus (2) connects by high pressure spring wire (18) and temperature measuring equipment leading-out terminal (15) with the temperature controller (26)
Connect.
10. a kind of generator stator bar end surface current potential contactless measuring system according to claim 1, it is special
Sign is that the camera bellows (8) is made up of nontransparent insulating materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721021408.2U CN207051394U (en) | 2017-08-15 | 2017-08-15 | A kind of generator stator bar end surface current potential contactless measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721021408.2U CN207051394U (en) | 2017-08-15 | 2017-08-15 | A kind of generator stator bar end surface current potential contactless measuring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207051394U true CN207051394U (en) | 2018-02-27 |
Family
ID=61503923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721021408.2U Expired - Fee Related CN207051394U (en) | 2017-08-15 | 2017-08-15 | A kind of generator stator bar end surface current potential contactless measuring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207051394U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112986756A (en) * | 2021-01-29 | 2021-06-18 | 哈尔滨理工大学 | Nondestructive testing method for determining anti-corona structure of generator stator bar |
| CN116718915A (en) * | 2023-08-10 | 2023-09-08 | 西门子电机(中国)有限公司 | Motor notch electric field intensity detection method and device, electronic equipment and storage medium |
-
2017
- 2017-08-15 CN CN201721021408.2U patent/CN207051394U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112986756A (en) * | 2021-01-29 | 2021-06-18 | 哈尔滨理工大学 | Nondestructive testing method for determining anti-corona structure of generator stator bar |
| CN112986756B (en) * | 2021-01-29 | 2022-08-02 | 哈尔滨理工大学 | Nondestructive testing method for determining anti-corona structure of generator stator bar |
| CN116718915A (en) * | 2023-08-10 | 2023-09-08 | 西门子电机(中国)有限公司 | Motor notch electric field intensity detection method and device, electronic equipment and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180227 Termination date: 20200815 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |