CN207650111U - A kind of acceleration water-treeing pilot system monitored - Google Patents
A kind of acceleration water-treeing pilot system monitored Download PDFInfo
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- CN207650111U CN207650111U CN201721713529.3U CN201721713529U CN207650111U CN 207650111 U CN207650111 U CN 207650111U CN 201721713529 U CN201721713529 U CN 201721713529U CN 207650111 U CN207650111 U CN 207650111U
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- water
- treeing
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- water tree
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Abstract
The utility model discloses a kind of acceleration water-treeing pilot systems monitored, are monitored to the water-treeing experiment process of the insulating materials such as crosslinked polyethylene, can intuitively observe initiation and the growth course of water tree.The system includes：AC high voltage source device accelerates water-treeing experimental rig and monitoring system, AC high voltage source device is made of signal generator, power amplifier, transformer and current limiting element, water-treeing experimental rig is accelerated to be tested using improved liquid drugs injection method, monitoring system is mainly made of microscope, camera, electronics galvanometer, current acquisition module and computer.The utility model can observe the water-treeing situation of sample in real time, more accurately obtain the water tree initial time of sample, the growing state of water tree is monitored more in time, more easily controls the initiation time of water tree and extent of growth in material, has great importance to water tree characteristic research.
Description
Technical field
The utility model is related to high voltage and insulation technology field, specifically a kind of acceleration water-treeing experiment monitored
System.
Background technology
After cable puts into operation, insulation is inevitably generated aging by the effect of electricity, heat, machinery and moisture etc.
Phenomenon influences the operational reliability and service life of cable.The study found that water tree aging is to cause twisted polyethylene cable exhausted
An important factor for edge lost of life, and can not almost avoid.Under certain conditions, lower AC field can be exhausted in cable
The regional development that the electric fields such as air gap, impure point and inside and outside shield semiconductors bed boundary inside edge are more concentrated forms water tree
Branch.Water tree can gradually develop into electric branch after being formed causes material insulation property further to decline, to reduce making for cable
Use the service life.Therefore, it is particularly important to improving cable insulation level that water tree growth characteristics in insulating materials are studied, current traditional examination
Proved recipe formula is then first aging sample is sliced dyeing observation, cannot monitor the growing state of water tree in real time.So establishing an energy
Enough water trees of observation in real time cause and the water tree observation system of growth proves and to water tree growth mechanism the experiment of existing theory
Research have positive meaning.
Therefore, in order to from visual angle further investigate water tree initiation and growth course to material insulation property
It influences, needs one can monitor the water-treeing system that water tree causes situation and growing state in real time.
Utility model content
The purpose of this utility model is that a kind of acceleration water-treeing pilot system monitored is proposed, to crosslinked polyethylene
The water-treeing experiment process of equal insulating materials is monitored, and more intuitively observes the initiation of water tree and growth course is supervised simultaneously
Survey the curent change by insulating materials.
The utility model provides a kind of acceleration water-treeing pilot system monitored to achieve the goals above, main to wrap
It includes：AC high voltage source device accelerates water-treeing experimental rig and monitoring system.
Further, AC high voltage source device is mainly by signal generator, power amplifier, transformer and current limiting element
Composition.
Further, accelerate water-treeing experimental rig mainly molten by seal shield box, silicone oil, draw point electrode, silver nitrate
Liquid and grounding electrode composition.
Further, monitoring system is mainly by microscope, camera, electronics galvanometer, current acquisition module and computer group
At.
Compared with water-treeing experimental rig common at present, the major advantage of the utility model is：Different from tradition
The characteristics of experiment can only take the water tree after accelerating to cultivate to be observed, the water tree that the utility model can dynamically observe sample is old
Change situation, more accurately obtain the water tree initial time of sample and the growing state of water tree, controls water tree in material more in time
The initiation time of branch and extent of growth, moreover it is possible to further study the pass between water tree length and the choked flow ability of insulating materials
System.
Description of the drawings
Fig. 1 is the structural schematic diagram that the utility model is used for crosslinking polyethylene-insulated cable insulation layer sample；
Fig. 2 is the structural schematic diagram of AC high voltage source device in the utility model；
Fig. 3 is the schematic diagram of aging sample in the utility model；
In figure：1- AC high voltage source devices；2- water-treeing samples；3- seal shield box；4- silicone oil；5- microscopes；
6- cameras；7- electronics galvanometers；8- current acquisition modules；9- computers；10- transformers；11- current limiting elements；12- water-treeings
Device；13- draw points；14- grounding electrodes；15- silver nitrate solutions.
Specific implementation mode
In order to become apparent from and compactly illustrate the principles of the present invention and advantage, will hereafter omit to the utility model not
The description of material particular simultaneously carries out the primary structure of this acceleration water-treeing pilot system monitored in conjunction with attached drawing detailed
Explanation.
Fig. 1 show structural schematic diagram of the utility model for crosslinking polyethylene-insulated cable insulation layer sample, the system
Mainly include AC high voltage source device 1, water-treeing sample 2, seal shield box 3, silicone oil 4 and by microscope 5, camera 6,
The monitoring system that electronics galvanometer 7, current acquisition module 8 are formed with computer 9.The structure of AC high voltage source device 1 hereafter will
It is explained in detail in conjunction with Fig. 2, the effect of AC high voltage source device 1 is to provide high pressure and makees come electric field when simulating water-treeing experiment
With, and can need to adjust the amplitude and frequency of output voltage according to experiment.Water-treeing sample 2 needs the base in liquid drugs injection method
It is improved and handles again on plinth, specific processing method is described in detail below in conjunction with Fig. 3.Water tree causes and growth originally has
Prodigious randomness, seal shield box 3 are the influences in order to reduce external interference to test result.Silicone oil 4 is for preventing
The external discharge and edge flashing of water-treeing sample 2 under high-frequency and high-voltage.The structure of monitoring system is described in detail below, monitoring
The effect of system is to record and analyze in real time the water tree growing state electricity that simultaneously synchronous recording passes through sample of liquid drugs injection tip portion
Stream.
Fig. 2 show the structural schematic diagram of AC high voltage source device 1 in the utility model, by signal generator, power
Amplifier, transformer 10 and current limiting element 11 form.Wherein, signal generator is used for generating the signal source of frequency needed for experiment；
Power amplifier carries out the power of signal the amplification of appropriateness；Last signal is amplified to test voltage by transformer 10.In reality
In the experiment of border, it usually needs multiple water-treeing devices 12 in parallel compare and analyze, if there is sample to be sent out due to breakdown at this time
Raw short circuit will have an impact total system, thus be added in systems current limiting element 11 come guarantee test it is safe and reliable into
Row.
Fig. 3 show the processing procedure schematic diagram of sample 2 in the utility model, includes mainly draw point 13, grounding electrode 14
With silver nitrate solution 15.The sample that suitable dimension is selected according to test objective and experimental rig feature, using special equipment by steel
Needle 13 is at the uniform velocity inserted into sample 2, and the needle point of draw point 13 pricks out the hole of 2 mm of diameter or so, draw point 13 in the side of sample 2
Needle point at a distance from grounding electrode 14 be 2 mm.After draw point 13 is extracted, noted into the hole of the 2mm just pricked out with syringe
Enter suitable silver nitrate solution 15, then draw point 13 is inserted into, the needle point of draw point 13 is made to be immersed in silver nitrate solution 15.Choose nitre
The reason of sour silver solution 15, which is silver ion, has very strong reproducibility, and silver ion is reduced into simple substance in the growth channel of water tree
Silver, elemental silver are attached in the channel of water tree, and water tree channel can be seen under microscope 5, replace the dyeing of traditional experiment whereby
Process.At this time since the diameter of draw point 13 is identical as the hole aperture pricked, the silver nitrate solution 15 of the tip portion of draw point 13
It is sealed in sample 2, to be isolated with the silicone oil 4 of 2 outside of sample.The other end of draw point 13 and AC high voltage source device 1
High-field electrode connection, the bottom of sample 2 stick conductive aluminum foil constitute grounding electrode 14, so far form experiment needed for changing
Into liquid drugs injection electrode, sample 2 processing complete.
The workflow that the monitoring system of water tree growing state is observed in the utility model is as described below：Microscope 5 is put
It sets in the top of sample 2, microscope 5 is connected with camera 6 in next step, is finally then connected to computer 9.Adjust microscope 5
Amplification factor can extremely be clearly observed 2 image of sample of tip portion, and computer 9 is then arranged and controls camera 6 every 30
Minute takes pictures once, then is shown the image for the water tree growing state that camera 6 photographed by the image capture software in computer 9
Show on the screen of computer 9, then the length of water tree is measured to study water tree by the image analysis software in computer 9
Growth characteristics.By controlling current acquisition module 8 from electronics galvanometer 7 while computer 9 sends out photographing instruction to camera 6
Current value is read to show and be recorded in computer 9.
The above, only an example specific embodiment of the utility model, the scope of protection of the utility model include but
It is not limited only to this, the equivalent variations scheme based on the utility model in essence content should all belong to the scope of protection of the utility model
Within.
Claims (3)
1. a kind of acceleration water-treeing pilot system monitored, it is characterized in that AC high voltage source device（1）, water-treeing examination
Sample（2）, seal shield box（3）, silicone oil（4）With by microscope（5）, camera（6）, electronics galvanometer（7）, current acquisition module
（8）With computer（9）The monitoring system of composition；AC high voltage source device（1）It is by signal generator, power amplifier, transformation
Device（10）And current limiting element（11）Composition, wherein signal generator is used for generating the signal source of frequency needed for experiment, power amplification
Device carries out the power of signal the amplification of appropriateness, and last signal passes through transformer（10）It is amplified to test voltage；In test, lead to
Often need multiple water-treeing devices in parallel（12）It compares and analyzes, if there is sample will be to whole due to breakdown generation short circuit at this time
System system has an impact, therefore current limiting element is added in systems（11）Carry out the safe and reliable progress of guarantee test；Monitoring system
It is by microscope（5）, camera（6）, electronics galvanometer（7）, current acquisition module（8）And computer（9）Composition, monitoring system are former
Reason is：By microscope（5）It is placed on sample（2）Top, in next step by microscope（5）With camera（6）It is connected, finally connects again
It is connected to computer（9）, adjust microscope（5）Amplification factor can extremely be clearly observed the sample of tip portion（2）Image, so
After computer is set（9）Control camera（6）It took pictures every 30 minutes primary, then passes through computer（9）By camera（6）The water photographed
The image of branch growing state is shown in computer（9）Screen on, then pass through computer（9）The length of water tree is measured to study
The growth characteristics of water tree, computer（9）To camera（6）By controlling current acquisition module while sending out photographing instruction（8）
From electronics galvanometer（7）Middle reading current value shows and is recorded in computer（9）In.
2. the acceleration water-treeing pilot system according to claim 1 monitored, it is characterized in that will using special equipment
Draw point（13）At the uniform velocity it is inserted into sample（2）, draw point（13）Needle point in sample（2）Side prick out the hole of 2 mm of diameter or so
Hole, draw point（13）Needle point and grounding electrode（14）Distance be 2 mm；By draw point（13）After extraction, with syringe to just pricking out
2mm hole in the suitable silver nitrate solution of injection（15）, then by draw point（13）It is inserted into, makes draw point（13）Needle point be immersed in
Silver nitrate solution（15）In；Choose silver nitrate solution（15）The reason of be silver ion have very strong reproducibility, in the life of water tree
Silver ion is reduced into elemental silver in long-channel, and elemental silver is attached in the channel of water tree, can be in microscope（5）Under see water tree
Channel replaces the dyeing course of traditional experiment whereby；At this time due to draw point（13）Diameter it is identical as the hole aperture pricked, steel
Needle（13）Tip portion silver nitrate solution（15）It is sealed in sample（2）In, thus and sample（2）The silicone oil of outside（4）
Isolation；Draw point（13）The other end and AC high voltage source device（1）High-field electrode connection, in sample（2）Bottom stick
Conductive aluminum foil constitutes grounding electrode（14）, so far form the improved liquid drugs injection electrode needed for experiment, sample（2）Processing is completed.
3. the acceleration water-treeing pilot system according to claim 1 monitored, it is characterized in that seal shield box（3）For
Reduce influence of the external interference to test result, wherein silicone oil（4）It is for preventing the water-treeing sample under high-frequency and high-voltage
（2）External discharge and edge flashing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721713529.3U CN207650111U (en) | 2017-12-11 | 2017-12-11 | A kind of acceleration water-treeing pilot system monitored |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721713529.3U CN207650111U (en) | 2017-12-11 | 2017-12-11 | A kind of acceleration water-treeing pilot system monitored |
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| Publication Number | Publication Date |
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| CN207650111U true CN207650111U (en) | 2018-07-24 |
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| CN201721713529.3U Expired - Fee Related CN207650111U (en) | 2017-12-11 | 2017-12-11 | A kind of acceleration water-treeing pilot system monitored |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111638417A (en) * | 2020-06-10 | 2020-09-08 | 南方电网科学研究院有限责任公司 | Be used for 10kV crosslinked polyethylene cable section sample water tree culture apparatus |
| CN111665425A (en) * | 2020-07-09 | 2020-09-15 | 国网山西省电力公司电力科学研究院 | Device and method for rapidly detecting tree resistance of crosslinked polyethylene cable |
-
2017
- 2017-12-11 CN CN201721713529.3U patent/CN207650111U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111638417A (en) * | 2020-06-10 | 2020-09-08 | 南方电网科学研究院有限责任公司 | Be used for 10kV crosslinked polyethylene cable section sample water tree culture apparatus |
| CN111638417B (en) * | 2020-06-10 | 2021-03-09 | 南方电网科学研究院有限责任公司 | Be used for 10kV crosslinked polyethylene cable section sample water tree culture apparatus |
| CN111665425A (en) * | 2020-07-09 | 2020-09-15 | 国网山西省电力公司电力科学研究院 | Device and method for rapidly detecting tree resistance of crosslinked polyethylene cable |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180724 Termination date: 20181211 |
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| CF01 | Termination of patent right due to non-payment of annual fee |