CN106093611B - Converter transformer oiled paper insulation surface charge measuring device - Google Patents
Converter transformer oiled paper insulation surface charge measuring device Download PDFInfo
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- CN106093611B CN106093611B CN201610458198.7A CN201610458198A CN106093611B CN 106093611 B CN106093611 B CN 106093611B CN 201610458198 A CN201610458198 A CN 201610458198A CN 106093611 B CN106093611 B CN 106093611B
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- surface charge
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- 238000009413 insulation Methods 0.000 title claims abstract description 95
- 239000000523 sample Substances 0.000 claims abstract description 34
- 230000007246 mechanism Effects 0.000 claims abstract description 28
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 238000005259 measurement Methods 0.000 claims description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims 1
- 238000002347 injection Methods 0.000 abstract description 6
- 239000007924 injection Substances 0.000 abstract description 6
- 230000008859 change Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 10
- 239000002131 composite material Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000000691 measurement method Methods 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 238000010835 comparative analysis Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/24—Arrangements for measuring quantities of charge
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Housings And Mounting Of Transformers (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention relates to a device for measuring the charge of an oil paper insulation surface. The oiled paper insulation surface charge measuring device comprises a supporting mechanism, a charge injection mechanism and a surface potential measuring mechanism. The supporting mechanism is an engineering insulation structure and comprises a platform for placing the oil paper to be tested for insulation and a support arranged above the platform, and a sample carrying platform capable of moving is arranged. One end of the output power supply is connected with the needle electrode through a lead, and the other end of the output power supply is grounded through a lead. The needle electrode is fixed on the support and keeps a preset distance from the oil paper to be detected in an insulating mode. The ground electrode is arranged on the lower side of the oiled paper insulation and is grounded through a lead. One end of the surface potentiometer is connected with the detection probe, and the other end of the surface potentiometer is connected with the data acquisition unit. The detection probe is fixed on the bracket and keeps a preset distance from the oil paper to be detected in an insulating way. Through using the insulating surface charge measuring device of oiled paper, can the quick travel sample, convenient, detect insulating oiled paper surface voltage and surface charge change characteristic under the multiple voltage condition fast, have deeper understanding to the charge transport characteristic.
Description
Technical field
The present invention relates to charge measurement technical field more particularly to a kind of converter transformer paper oil insulation surface charge measurements
Device.
Background technique
Major insulation is generally oil-paper combination insulation inside converter power transformer, although insulation system takes conservative design,
Still often there is insulation fault in valve side major insulation in actual operation.This is because the particularity of operating condition, converter power transformer conduct
AC and DC transmission system couple both ends converter station and Inverter Station core equipment, the driving voltage type of valve side winding with it is general
Logical power transformer has very big difference: in addition to bearing alternating voltage, lightning impulse and switching overvoltage, also subject to direct current, direct current
The voltages effect such as superposition exchange and polarity reversion.Under the effect of these voltages, the field distribution and conventional power of inside transformer
There is very big difference for transformer.This allow for converter power transformer either design or manufacture view will be than common
Power transformer is complicated.
Converter transformer valve-side major insulation is not simple manufacturability issues, it is necessary to be carried out to its insulation characterisitic and mechanism
Further investigation.It needs to design and develop the device for carrying out charge measurement to paper oil insulation, change of current change is accurately measured under more field conditions
Depressor paper oil insulation distribution of charges can be charge in paper oil insulation transport property to direct current transportation equipment operational reliability is improved
Analysis solves the important theoretical foundation of paper oil insulation breakdown offer, and it is important to guarantee that entire direct current transportation Cybersecurity Operation has
Learning value and engineering significance.
Summary of the invention
Based on this, it is necessary to provide a kind of converter transformer paper oil insulation surface charge measuring device.
A kind of paper oil insulation surface charge measuring device, including supporting mechanism, charge injecting mechanism and surface potential measurement
Mechanism.
The supporting mechanism is that engineering insulation includes platform for placing paper oil insulation to be measured and above platform
Bracket.
The charge injecting mechanism includes out-put supply, pin electrode, ground electrode and conducting wire.Described out-put supply one end is through leading
Line connects pin electrode, and the other end is through wired earth.The pin electrode is fixed on the bracket, and keeps pre- with paper oil insulation to be measured
If distance.The ground electrode is placed on the downside of paper oil insulation, and through wired earth.
The surface potential measurement mechanism includes surface potential meter, detection probe, data collector and conducting wire.The surface
Potentiometer one end connecting detection probe, the other end connect data collector.The detection probe is fixed on the bracket, and with
Paper oil insulation to be measured keeps pre-determined distance.
The out-put supply can export multiple types voltage, including DC voltage, polarity in one of the embodiments,
Reversal voltage, pulse voltage and direct current and pulse composite voltage.
The supporting mechanism is additionally provided with the load sample platform for placing paper oil insulation in one of the embodiments,；The load
The movable setting of sample platform is on the platform.
The load sample platform is connected by conducting wire with ground electrode in one of the embodiments,.
The ground electrode is copper sheets in one of the embodiments,.
The voltage value of the out-put supply is -5~5kV in one of the embodiments,.
The pin electrode is 3mm at a distance from the paper oil insulation sample in one of the embodiments,.
The detection probe is 3.5mm at a distance from the paper oil insulation sample in one of the embodiments,.
By using above-mentioned converter transformer paper oil insulation surface charge measuring device, can be convenient, rapidly detection is more
Paper oil insulation surface voltage and surface charge variation characteristic under kind voltage conditions, have Charge Transport Proper ty deeper
Solution.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of paper oil insulation surface charge measuring device；
Fig. 2 is the method schematic diagram that paper oil insulation surface charge is measured using paper oil insulation surface charge measuring device；
Fig. 3 a is the charge characteristic of the paper oil insulation with different number of plies paper under the conditions of Negative-Positive-Negative DC voltage；
Fig. 3 b is the charge characteristic of the paper oil insulation with different number of plies paper under the conditions of Negative-Positive-Negative DC voltage；
Fig. 4 a is the independent charge characteristic for applying paper oil insulation under different pulse voltage amplitudes under positive pulse voltage；
Fig. 4 b is the independent charge characteristic for applying paper oil insulation under different pulse voltage amplitudes under negative pulse voltage；
Fig. 5 a is the charge injection for applying paper oil insulation under different pulse voltage amplitudes under direct current and positive pulse composite voltage
Characteristic；
Fig. 5 b is the charge injection for applying paper oil insulation under different pulse voltage amplitudes under direct current and negative pulse composite voltage
Characteristic.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give presently preferred embodiments of the present invention.But the invention can be realized in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is keeps the understanding to the disclosure more thorough
Comprehensively.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
Incorporated by reference to attached drawing 1, the converter transformer paper oil insulation surface charge measuring device 10 of an embodiment, including support machine
Structure 100, charge injecting mechanism 200 and surface potential measurement mechanism 300.
Supporting mechanism 100 includes platform 110 and the bracket (not shown) above platform 110.Platform 110 and bracket are equal
It is made by engineering insulating materials.In the present embodiment, the also settable mobilizable load sample platform 120 of supporting mechanism 100, for placing
Paper oil insulation 20 and shift position.Load sample platform 120 is located on platform 110, and is connected with ground electrode by conducting wire.
Charge injecting mechanism 200 includes out-put supply 210, pin electrode 220, ground electrode 230 and conducting wire (not indicating in figure).
210 one end of out-put supply connects pin electrode 220 through conducting wire, and the other end is through wired earth.Pin electrode 220 is fixed on one
On bracket, and pre-determined distance is kept with paper oil insulation 20 to be measured.
The out-put supply 210 of charge injecting mechanism 200 can export multiple types voltage, including DC voltage, polarity are anti-
Turn voltage, pulse voltage or direct current and pulse composite voltage etc..
Surface potential measurement mechanism 300 includes epitope potentiometer 310, detection probe 320, data collector 330 and conducting wire.
310 one end connecting detection of surface potential meter probe 320, the other end connects data collector 330.Detection probe 320 is fixed on separately
On one bracket, and pre-determined distance is kept with paper oil insulation 20 to be measured.
Incorporated by reference to attached drawing 2, paper oil insulation surface is measured using converter transformer paper oil insulation surface charge measuring device 10
The method and step of charge is as follows:
Paper oil insulation 20 to be measured is placed on platform 110 by step S1, and is located at the lower section of pin electrode 220, with pin electrode
220 keep pre-determined distance；
Step S2 adjusts the output voltage type of out-put supply 210 in charge injecting mechanism 200, carries out corona charging；
Step S3 rapidly sets to zero 210 output voltage of out-put supply after charging；
Step S4, by the paper oil insulation 20 after charging move to 110 other side of platform detection probe 320 in the following, with
Detection probe 320 keeps pre-determined distance, the table changed over time using the paper oil insulation 20 after the measurement charging of surface potential meter 310
Face voltage value, data collector 330 acquire data and carry out data processing.
In the above-described embodiments, the output voltage type of out-put supply 210 is adjusted to DC voltage, polarity reversion as needed
Voltage, pulse voltage or direct current and pulse composite voltage, the range value of output voltage are -5~5kV.
In above-described embodiment measurement process, height of the needle point of pin electrode 220 apart from paper oil insulation 20 to be measured is 3mm.
In above-described embodiment measurement process, height of the detection probe 320 apart from paper oil insulation 20 to be measured is 3.5mm.
In above-described embodiment measurement process, the needle point of pin electrode 220 and the be aligned paper oil insulation 20 of detection probe 320
Position is identical, specially the middle part of paper oil insulation 20, to guarantee the accuracy and validity of test result.
Below with reference to specific embodiment further understand the converter transformer paper oil insulation surface charge measuring device and
The measurement method of paper oil insulation surface charge.
1, material and equipment
Potentiometric model is Trek347-3hce.Potentiometric effect is the current potential for measuring specimen surface, thus
Surface charge can be calculated.Its measurement accuracy is ± 3V, and resolution ratio is 3mm.
The model of Kelvin's detection probe is 6000b-5c.
2, process is tested
Respectively by the output voltage type tune of charge injecting mechanism out-put supply in paper oil insulation surface charge measuring device
Section is DC voltage, polarity reversal voltage, pulse voltage or direct current and pulse composite voltage.It is surveyed according to above-mentioned measurement method
It is fixed.Wherein, it should be noted that height of the needle point of pin electrode apart from paper oil insulation to be measured is 3mm；Detection probe is apart to be measured
The height of paper oil insulation is by 3.5mm and position that pin electrode needle point and the detection probe are directed at paper oil insulation is identical.
(1) detection of DC voltage corona charging and surface charge
The output voltage type of the out-put supply of paper oil insulation surface charge measuring device is adjusted to DC voltage, according to attached
Measurement method in Fig. 2 measures paper oil insulation surface voltage, is further scaled in the case where the paper oil insulation number of plies is different
The situation of change of surface charge density, and across comparison analysis is carried out to the accumulation of paper oil insulation surface charge and the case where dissipation.
As shown in Figure 3a and Figure 3b shows, it is shown that with the oilpaper of different number of plies paper under the conditions of different DC voltages in figure
The charge characteristic of insulation.From Fig. 3 a and Fig. 3 b comparative analysis it is found that with the paper number of plies increase, surface charge density it is absolute
Value will be reduced, and the surface charge density under single layer dielectrics paper is more much larger than the surface charge density in the case of other.Therefore,
It reflect dielectric strength that single-part stationery needs than in other situations will be strong, and the surface electricity with three-ply paper of four layers of paper
Lotus density is similar.
(2) detection of pulse voltage corona charging and surface charge
The output voltage type of paper oil insulation surface charge measuring device out-put supply is adjusted to pulse voltage, and respectively
Positive and negative voltage is exported, is changed with time situation according to measurement method measurement paper oil insulation surface voltage in attached drawing 2, and to oil
The case where accumulation of paper insulation surface charge and dissipation, carries out across comparison analysis.
As shown in figures 4 a and 4b, it is shown in figure and individually applies under different pulse voltages under different pulse voltage amplitudes
The charge characteristic of paper oil insulation.From Fig. 4 a and Fig. 4 b comparative analysis it is found that the increase of voltage magnitude can cause paper oil insulation surface
Current potential increases, this shows that more charges can be injected into the surface of paper oil insulation, and can send out compared under high pulse voltage
Existing, charge injection needs a threshold value.Charge can just be injected into paper oil insulation surface when only voltage is higher than this threshold value.Negative arteries and veins
The absolute value for rushing the surface potential initial value under voltage is higher than the initial value of positive pulse voltage under the same test conditions, this table
The surface charge of paper oil insulation is fewer than negative voltage under bright positive voltage, it is possible thereby to infer that the detrapping process of negative electrical charge compares positive charge
It is more difficult.
(3) detection of DC voltage and pulse compound voltage corona charging and surface charge
Using paper oil insulation surface charge measuring device, output voltage type is adjusted to DC voltage and pulse composite voltage
Collective effect under, and export the composite voltage of positive and negative DC voltage Yu positive and negative DC pulse respectively, measure paper oil insulation
Surface charge situation of change, and across comparison analysis is carried out to the initial voltage situation on paper oil insulation surface.
As shown in figure 5 a and 5b, it is shown in figure and applies different pulse voltages under different direct currents and pulse composite voltage
The charge injection properties of paper oil insulation under amplitude.From Fig. 5 a and Fig. 5 b comparative analysis it is found that working as the polarity of direct current and pulse voltage
When identical, curve has an apparent inflection point.And when the two polarity is opposite, curve is in single trend.At the same time, charge
Recombination process is a complicated process, it depends on original amount of charge and polarity on specimen surface in this experiment.
When direct current is identical with the polarity of pulse voltage, the voltage threshold of charge injection is higher.Otherwise threshold value is lower, and without DC voltage
When voltage threshold therebetween.
Mathematics is carried out by measuring to paper oil insulation surface charge under different voltages type action, and to measurement data
Processing is analyzed the accumulation of paper oil insulation surface charge, dissipation and coupling process under different voltages parameter, sample parameter, can be understood fully
Transport property of Chu's charge in paper oil insulation.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (8)
1. a kind of converter transformer paper oil insulation surface charge measuring device, which is characterized in that injected including supporting mechanism, charge
Mechanism and surface potential measurement mechanism；
The supporting mechanism is engineering insulation, including the platform for placing paper oil insulation to be measured and the branch above platform
Frame；
The charge injecting mechanism includes out-put supply, pin electrode, ground electrode and conducting wire；Described out-put supply one end connects through conducting wire
Pin electrode, the other end is through wired earth；The pin electrode is fixed on the bracket, and with paper oil insulation to be measured keep it is default away from
From；The ground electrode is placed on the downside of paper oil insulation, and through wired earth；
The surface potential measurement mechanism includes surface potential meter, detection probe, data collector and conducting wire；The surface potential
One end connecting detection probe is counted, the other end connects data collector, and the measurement accuracy of the surface potential meter is ± 3V；The inspection
Probing head is fixed on the bracket, and keeps pre-determined distance with paper oil insulation to be measured.
2. converter transformer paper oil insulation surface charge measuring device as described in claim 1, which is characterized in that the output
Power supply can export multiple types voltage, including DC voltage, polarity reversal voltage, pulse voltage and direct current and pulse compound electric
Pressure.
3. converter transformer paper oil insulation surface charge measuring device as described in claim 1, which is characterized in that the support
Mechanism is additionally provided with the load sample platform for placing paper oil insulation；The movable setting of load sample platform is on the platform.
4. converter transformer paper oil insulation surface charge measuring device as claimed in claim 3, which is characterized in that the load sample
Platform is connected by conducting wire with ground electrode.
5. converter transformer paper oil insulation surface charge measuring device as described in claim 1, which is characterized in that the ground electricity
Extremely copper sheets.
6. converter transformer paper oil insulation surface charge measuring device as described in claim 1, which is characterized in that the output
The voltage value of power supply is -5~5kV.
7. such as converter transformer paper oil insulation surface charge measuring device according to any one of claims 1 to 6, feature exists
In the pin electrode is 3mm at a distance from the paper oil insulation sample.
8. such as converter transformer paper oil insulation surface charge measuring device according to any one of claims 1 to 6, feature exists
In the detection probe is 3.5mm at a distance from the paper oil insulation sample.
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| CN201610458198.7A CN106093611B (en) | 2016-06-20 | 2016-06-20 | Converter transformer oiled paper insulation surface charge measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610458198.7A CN106093611B (en) | 2016-06-20 | 2016-06-20 | Converter transformer oiled paper insulation surface charge measuring device |
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| CN106093611A CN106093611A (en) | 2016-11-09 |
| CN106093611B true CN106093611B (en) | 2019-04-23 |
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| CN106680679A (en) * | 2017-01-06 | 2017-05-17 | 云南电网有限责任公司电力科学研究院 | Cable insulating material surface charge measuring device and method |
| CN108490276A (en) * | 2018-01-25 | 2018-09-04 | 天津大学 | A kind of polypropylene film temperature field lower surface charge detecting device and measurement method |
| CN108387789A (en) * | 2018-02-08 | 2018-08-10 | 天津大学 | The surface charge measurement method of cellulose insulation paper under temperature gradient |
| CN108680835A (en) * | 2018-04-26 | 2018-10-19 | 天津大学 | Paper oil insulation surface charge measuring device and method based on DC stacked harmonic wave |
| CN110286271A (en) * | 2019-06-14 | 2019-09-27 | 中国科学院电工研究所 | A kind of measuring system, method and the analysis method of dielectric surface charge properties |
| CN110470922A (en) * | 2019-08-28 | 2019-11-19 | 西南交通大学 | Insulating materials surface charge detection device and its control method under high-speed flow environment |
| CN111505452B (en) * | 2020-04-09 | 2021-11-23 | 天津大学 | Insulating material surface electrification experimental method based on high-voltage pulse superposition direct-current voltage |
| CN111562448B (en) * | 2020-05-15 | 2023-02-28 | 南方电网科学研究院有限责任公司 | High-voltage direct-current cable insulating layer charge injection amount characterization method |
| CN113848396B (en) * | 2021-09-26 | 2024-04-05 | 黑龙江坤润电气科技有限公司 | Device and method for measuring electric charge on insulating surface of oiled paper |
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| JP2001116789A (en) * | 1999-10-21 | 2001-04-27 | Mitsubishi Cable Ind Ltd | Method for measuring residual charge of insulator and method for diagnosing insulation deterioration of power cable using it |
| CN104007329A (en) * | 2014-05-13 | 2014-08-27 | 西安交通大学 | System used for measuring internal space charges of oil paper insulating material |
| CN104655945B (en) * | 2015-03-12 | 2018-04-24 | 国家电网公司 | A kind of device and method for measuring oil-paper combination insulation space of components distribution of charges |
| CN104991129B (en) * | 2015-03-27 | 2017-11-28 | 华北电力大学 | A kind of vacuum insulator surface charge three-dimensional measuring apparatus |
| CN205080200U (en) * | 2015-09-14 | 2016-03-09 | 河南平高电气股份有限公司 | Surface charge measuring device |
| CN205691675U (en) * | 2016-06-20 | 2016-11-16 | 南方电网科学研究院有限责任公司 | Converter transformer oiled paper insulation surface charge measuring device |
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| Title |
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| 交直流复合电场下油纸绝缘界面电荷对沿面闪络电压的影响;陈义龙等;《电网技术》;20140430;第38卷(第4期);文章第1073页左栏第2段-1074页右栏倒数第1段，图6-9 |
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