CN108896445A - A kind of transformer oilpaper interface electron mobility test device - Google Patents
A kind of transformer oilpaper interface electron mobility test device Download PDFInfo
- Publication number
- CN108896445A CN108896445A CN201810691878.2A CN201810691878A CN108896445A CN 108896445 A CN108896445 A CN 108896445A CN 201810691878 A CN201810691878 A CN 201810691878A CN 108896445 A CN108896445 A CN 108896445A
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- electron mobility
- test
- cavity
- interface electron
- transformer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a kind of transformer oilpaper interface electron mobility test devices, including impulse voltage generator, test cavity, capacitive divider and computer, the impulse voltage generator connecting test cavity, test cavity also passes through capacitive divider and connects computer, the present invention can accurately measure influence of the various factors to oilpaper interface electron mobility, be able to comprehensively understand the conductance process of Oil-Paper Insulation and mechanism of modification.
Description
Technical field
The present invention relates to a kind of measuring device, specifically a kind of transformer oilpaper interface electron mobility test device.
Background technique
Carrier mobility is an important parameter, can reflect out the carrier transmission characteristics in liquid by it,
It can analyze and the essence for the substance that judges to work in charge transfer process, to provide the criterion of insulation performance variation.Current-carrying
Sub- transition process relates generally to Ion transfer and two kinds of electron transfer, and wherein the research of electron mobility, can reflect out electronics
Play the role of during conductance in insulating liquid.The temperature characterisitic of electron mobility can push away to obtain electron transition, capture biography
In defeated model, average energy when electronics is captured, the i.e. minimum potential barrier of conduction band.Therefore the research of electron transfer processes is for reason
Conductance and insulation breakdown process are of great significance in solution transformer oilpaper.But lack test transformer oilpaper interface electricity at present
The test device and method of transport factor.Only accurately measurement oilpaper interface electron mobility just further can comprehensively understand oil
The conductance process and mechanism of modification of paper insulation system.
Summary of the invention
The purpose of the present invention is to provide a kind of transformer oilpaper interface electron mobility test devices, to solve above-mentioned back
The problem of being proposed in scape technology.
To achieve the above object, the present invention provides the following technical solutions：
A kind of transformer oilpaper interface electron mobility test device, including impulse voltage generator, test cavity, capacitor
Divider and computer, the impulse voltage generator connecting test cavity, test cavity, which is also connected by capacitive divider, to be counted
Calculation machine.
As a further solution of the present invention：Protective resistance is equipped between the impulse voltage generator and test cavity.
As a further solution of the present invention：The bottom of the test cavity is equipped with cardboard, and the inside for testing cavity is also set
There is half ball electrode.
As further scheme of the invention：Transformer oil is equipped in the test chamber body.
As further scheme of the invention：Half ball electrode completes the copper sheet structure of symmetrical diameter 30mm by two
At.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention can accurately measure various factors to oilpaper circle
The influence of face electron mobility is able to comprehensively understand the conductance process of Oil-Paper Insulation and mechanism of modification.
Detailed description of the invention
Fig. 1 is structure chart of the invention.
Fig. 2 is that electron mobility measures the step voltage schematic diagram applied on cavity.
Fig. 3 is breakdown voltage and breakdown time fit correlation curve graph.
In figure：1- impulse voltage generator, 2- protective resistance, 3- capacitive divider, 4- test cavity, half ball electrode of 5-,
6- cardboard, 7- computer.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1-3, embodiment 1：In the embodiment of the present invention, a kind of transformer oilpaper interface electron mobility test dress
It sets, including power-supply system, experiment cavity systems, data processing system.
(1) power-supply system：It is made of low-tension supply and high voltage power supply.Low-tension supply is 220V AC power source, is calculated to be high
Machine power supply.High voltage power supply is 1100kV impact power supply, provides the step that wave front time is only 100ns for experiment cavity high-field electrode
Impact high voltage.
(2) cavity systems are tested：It is made of half ball electrode, transformer oil, cardboard.Half ball electrode is completed symmetrical by two
The copper sheet of diameter 30mm is constituted, while its electrode surface is all processed by shot blasting.Calliper is 2mm, fills transformer oil, makes
It is impregnated with cardboard while half ball electrode is completely covered.
(3) data processing system：It is made of capacitive divider, computer.Experimental data is carried out certain by capacitive divider
Ratio decaying, after can be transmitted to by data line computer carry out image procossing.
Embodiment 2：Specific test method is as follows：The electron transfer of various transformer oil is measured using breakdown time delay method
Rate, experimental provision are as shown in Figure 1.Apply step voltage to electrode by impulse voltage generator, obtains wave as shown in Figure 2
Shape.
Record breakdown generates the breakdown voltage of chopped wave, chopped wave breakdown time.By adjusting impulse voltage generator
Ball gap spacing, control breakdown voltage increase it constantly, and breakdown time constantly reduces, and after each breakdown test, all can on electrode
Leave small carbon trace, it is therefore desirable to which cleaning or replacement electrode are tested next time.It is final to be fitted after measuring in triplicate
The relational graph of breakdown voltage and breakdown time are drawn out, such as shown in Fig. 3.
By reading turnover moment t in breakdown voltage and breakdown time fit correlation curve graph0, and electricity is calculated according to formula 1
Transport factor u：
Wherein, d is electrode spacing, takes 0.05mm；U is breakdown voltage；t0For breakdown voltage and breakdown time fit correlation
Turnover moment point in curve.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (5)
1. a kind of transformer oilpaper interface electron mobility test device, including impulse voltage generator, test cavity, capacitor point
Depressor and computer, which is characterized in that the impulse voltage generator connecting test cavity, test cavity also pass through capacitance partial pressure
Device connects computer.
2. transformer oilpaper according to claim 1 interface electron mobility test device, which is characterized in that the impact
Protective resistance is equipped between voltage generator and test cavity.
3. transformer oilpaper according to claim 1 interface electron mobility test device, which is characterized in that the test
The bottom of cavity is equipped with cardboard, and the inside for testing cavity is additionally provided with half ball electrode.
4. transformer oilpaper according to claim 1 interface electron mobility test device, which is characterized in that the test
Transformer oil is equipped in cavity.
5. transformer oilpaper according to claim 3 interface electron mobility test device, which is characterized in that the hemisphere
The copper sheet that electrode completes symmetrical diameter 30mm by two is constituted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810691878.2A CN108896445A (en) | 2018-06-28 | 2018-06-28 | A kind of transformer oilpaper interface electron mobility test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810691878.2A CN108896445A (en) | 2018-06-28 | 2018-06-28 | A kind of transformer oilpaper interface electron mobility test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108896445A true CN108896445A (en) | 2018-11-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810691878.2A Pending CN108896445A (en) | 2018-06-28 | 2018-06-28 | A kind of transformer oilpaper interface electron mobility test device |
Country Status (1)
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| CN (1) | CN108896445A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110412357A (en) * | 2019-07-22 | 2019-11-05 | 重庆大学 | A kind of test device and method of liquid dielectric carrier mobility |
Citations (6)
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|---|---|---|---|---|
| DE102011103676A1 (en) * | 2011-06-09 | 2012-12-13 | Rainer Patsch | Method for characterization of insulation state of oiled paper insulated cable in high voltage power cable for determining ageing state, involves calculating p-factor from measured return voltage curves |
| CN103954896A (en) * | 2014-05-12 | 2014-07-30 | 国家电网公司 | Oiled paper insulation partial discharge inception voltage test system |
| CN103954895A (en) * | 2014-05-12 | 2014-07-30 | 国家电网公司 | Oiled paper compound insulation electrical ageing test system |
| CN105652129A (en) * | 2016-03-18 | 2016-06-08 | 华北电力大学 | Method for measuring mobility of electrons in insulating liquid |
| CN106154063A (en) * | 2016-06-20 | 2016-11-23 | 南方电网科学研究院有限责任公司 | Converter transformer oiled paper insulation surface charge measuring device and measuring method thereof |
| CN207440236U (en) * | 2017-11-27 | 2018-06-01 | 华北电力大学 | A kind of experiment porch for shooting transformer oilpaper Interface Current note |
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2018
- 2018-06-28 CN CN201810691878.2A patent/CN108896445A/en active Pending
Patent Citations (6)
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|---|---|---|---|---|
| DE102011103676A1 (en) * | 2011-06-09 | 2012-12-13 | Rainer Patsch | Method for characterization of insulation state of oiled paper insulated cable in high voltage power cable for determining ageing state, involves calculating p-factor from measured return voltage curves |
| CN103954896A (en) * | 2014-05-12 | 2014-07-30 | 国家电网公司 | Oiled paper insulation partial discharge inception voltage test system |
| CN103954895A (en) * | 2014-05-12 | 2014-07-30 | 国家电网公司 | Oiled paper compound insulation electrical ageing test system |
| CN105652129A (en) * | 2016-03-18 | 2016-06-08 | 华北电力大学 | Method for measuring mobility of electrons in insulating liquid |
| CN106154063A (en) * | 2016-06-20 | 2016-11-23 | 南方电网科学研究院有限责任公司 | Converter transformer oiled paper insulation surface charge measuring device and measuring method thereof |
| CN207440236U (en) * | 2017-11-27 | 2018-06-01 | 华北电力大学 | A kind of experiment porch for shooting transformer oilpaper Interface Current note |
Non-Patent Citations (1)
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| 齐波 等: "冲击电压下变压器油中空间电场测量方法及装置", 《中国电机工程学报》 * |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110412357A (en) * | 2019-07-22 | 2019-11-05 | 重庆大学 | A kind of test device and method of liquid dielectric carrier mobility |
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Application publication date: 20181127 |
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| RJ01 | Rejection of invention patent application after publication |