CN203465379U - Test platform for pin plate model of partial discharge test - Google Patents
Test platform for pin plate model of partial discharge test Download PDFInfo
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- CN203465379U CN203465379U CN201320459017.4U CN201320459017U CN203465379U CN 203465379 U CN203465379 U CN 203465379U CN 201320459017 U CN201320459017 U CN 201320459017U CN 203465379 U CN203465379 U CN 203465379U
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Abstract
The utility model relates to a test platform for a pin plate of a partial discharge test. The whole test platform is placed in a testing transformer and characterized in that the test platform is composed of a memory alloy spring, a metal pin, an insulating paper board, a metal supporting platform and an insulating bracket, wherein the memory alloy spring is placed in a temperature control box, and an endogenous bidirectional memory recovery alloy is adopted; one end of the metal pin is connected with a test power supply; the metal supporting platform is arranged below the metal pin; the insulating paper board is arranged between the metal supporting platform and the metal pin; and the metal supporting platform is fixed in an insulating oil by the insulating bracket and is ensured to be effectively grounded. The platform provided by the utility model not only can be used for researching the partial discharge development process of the pin plate model, but also can be used for researching insulating properties or aging characteristics of an insulating piece, and further can act as a verification platform for a great number of partial discharge monitoring methods and devices nowadays.
Description
Technical field
The utility model belongs to high pressure and insulation technology test field, say accurately and utilize a kind of memorial alloy, by regulating the present environment temperature of this memorial alloy, can change needle plate model partial discharge test process mesohigh electrode and insulating board distance, thus research needle plate model Characteristics of Partial Discharge.
Background technology
At present people to there is shelf depreciation in high voltage electric equipment, finally cause insulation breakdown phenomenon oneself more and more attach the importance, thereby the detection technique of the failure mechanism of the generating process of shelf depreciation, insulator and shelf depreciation is studied widely.
Shelf depreciation is that the position that electrical strength is lower in insulator under high electric field intensity effect occurs.It can show as the puncturing of gas infiltrate in insulation, among a small circle in the puncturing or the creeping discharge of solid dielectric etc. of solid or liquid medium.The condition that produces shelf depreciation depends on the Electric Field Distribution of seal and the electric physical property of insulation.
The method that detects now electric equipment shelf depreciation has a lot, roughly be divided into pulse current method, ultrasonic Detection Method, ultrahigh frequency detection method etc., because these detection side's ratio juris and equipment are all not quite similar, be therefore badly in need of wanting a kind of partial discharge test platform that can control actual discharge amount.
Shelf depreciation needle plate model is High-Voltage Electrical Appliances in a kind of very general a kind of discharge scenario that shelf depreciation occurs, and when shelf depreciation relates to cardboard, can destroy gradually cardboard, leaves charing passage on cardboard.The end of this charing passage will form powerful internal field, thereby original slightly non-uniform electric field has been transformed into severe non-uniform electric field, and then strengthen the expansion of partial discharge phenomenon, acceleration charing passage.
Due in needle plate model partial discharge test, no matter study the development of needle plate model shelf depreciation, still carry out insulating part insulating property or ageing properties test, all need frequent adjusting test voltage or paper oil insulation distance, wherein because insulating oil is different from the insulating property of the insulation of insulating paper, traditional shelf depreciation model, can only by the thickness of insulating board in regulating model, change size and the formation of insulation distance at twice intertrial interval, can not change the insulation oil clearance of trial target, therefore develop a kind of insulation distance that can freely change oil in test model paper oil insulation or paper, very important.
Summary of the invention
The purpose of this utility model is, overcomes the deficiencies in the prior art, invents a kind of test platform that can freely change the partial discharge test needle plate model of partial discharge test model dielectric strength and formation.
The technical scheme that the utility model adopts is: a kind of test platform of partial discharge test needle plate model, whole test platform is positioned in a testing transformer, it is characterized in that: this test platform is comprised of a memory alloy spring, metal needle, insulating board, metallic support platform, insulating support, wherein memory alloy spring is positioned in a temperature-controlled box, memorial alloy adopts endogenous bidirectional memory to recover alloy, can regulate the distance of metal needle and insulating board, thereby change insulation distance size; One end joint test power supply of metal needle, serves as the high-field electrode part in apparatus local discharge process; Below metal needle, lay a metallic support platform, this platform can play a supportive role, and also can serve as the low-field electrode part in shelf depreciation process; Between metallic support platform and metal needle, place insulating board; Metallic support platform is insulated support and is fixed in insulating oil, and guarantees this metallic support platform effective grounding.
The test platform of partial discharge test needle plate model as above, is characterized in that, metal needle is used copper pin.
The test platform of partial discharge test needle plate model as above, is characterized in that, metallic support platform adopts copper.
The beneficial effects of the utility model are: the utility model basis is Partial Discharge Detection test method now, develop and a kind ofly utilize temperature control memory alloy spring and be connected with metal needle in needle plate model, in the situation that controlling temperature conditioning unit, by regulating the outer residing environment temperature control spring of memory alloy spring flexible, thereby control the oil clearance size of this model, again by changing the thickness of the insulating parts such as insulating board, come size and the formation of the insulation distance of metering needle Slab, recycling now detection method for local discharge and the equipment of maturation is carried out Partial Discharge Detection test.This utility model also can selected Partial discharge detector's device for Subscriber Unit, by the adjusting to model insulation distance and trial voltage, thereby the discharge capacity of this model shelf depreciation, electric discharge attribute factor in change process of the test, can to different partial discharge methods or equipment, contrast very easily, thereby select suitable Partial Discharge Detection equipment.
This platform is placed on both can be for the evolution of research needle plate model shelf depreciation in a testing transformer, also can study insulating property or the aging characteristics of insulating part, also can be used as the verification platform of a large amount of partial discharge monitoring method and apparatus now, contrast traditional experiment platform, because model is placed on testing transformer inside, therefore it meets the especially actual conditions of transformer in operational process of High-Voltage Electrical Appliances more, so it is significant.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model test platform.
Fig. 2 is the circuit theory diagrams of the utility model test platform.
Embodiment
In order to understand better the utility model, below in conjunction with embodiment, further illustrate content of the present utility model, but content of the present utility model is not only confined to the following examples.Those skilled in the art can make various changes or modifications the utility model, and these equivalent form of values are equally within the listed claims limited range of the application.
Symbol description in accompanying drawing: 71-memory alloy spring; 72-insulating oil; 73-metal needle; 74-insulating board; 75-metallic support platform; 76-earthing device; 77-insulating support; 78-testing transformer; 1-experiment power supply; 2-protective resistance; 3-coupling capacitance; 4-detects impedance; 5-ground connection; 6-needle plate model; 7-detecting unit.
Shown in Fig. 1, it is example that the pulse current method of take detects shelf depreciation: whole test platform is positioned in a testing transformer 78.In order to lay test model, this testing transformer needs according to actual conditions in manufacturing process, suitably strengthens its fuel tank size.This test platform is comprised of a memory alloy spring 71, metal needle 73, insulating board 74, metallic support platform 75, insulating support 77, wherein memory alloy spring 71 is positioned in a temperature-controlled box, memorial alloy adopts endogenous bidirectional memory to recover alloy, the feature of this alloy is that the flexible meeting that can work as environment temperature change spring in period changes, can regulate like this distance of metal needle 73 and insulating board 74, thereby change the insulation distance size of this model.
One end joint test power supply of metal needle 73, therefore whole metal needle 73 serves as the high-field electrode part in apparatus local discharge process, in order to guarantee electric conductivity and the security of metal needle 73, recommends metal needle 73 to use copper pin.
Below metal needle 73, lay a metallic support platform 75 made of copper, this platform both can play a supportive role, and also can serve as the low-field electrode part in shelf depreciation process.Between metallic support platform 75 and metal needle 73, by test actual conditions, place insulating board 74 or other insulating parts.Metallic support platform 75 need be insulated support 77 and be fixed in insulating oil, and will guarantee this metallic support platform 75 effective groundings.
As shown in Figure 2, be the circuit theory diagrams of test platform.
In test platform, between experiment power supply 1 and system, need to connect one and protect impedance 2, its objective is protection test circuit, hookup utilizes a coupling capacitance 3 connect with detecting impedance 4, and carries out effective grounding by detection impedance 4.And it is in parallel with needle plate model 6 with coupling capacitance 3 to detect impedance 4.
It is example that the pulse current method of take is measured shelf depreciation, when needle plate model 6 has produced a shelf depreciation, at its two ends, will produce an instantaneous change in voltage △ u, in the loop now forming in needle plate model 6, coupling capacitance 3 and measurement impedance 4, produce a pulse current i.Pulse current i, through measuring impedance 4, produces a pulse voltage at its two ends.Transmission cable sends pulse voltage signal to measuring unit 7, through surveying instrument, to processing such as the collection of this signal, amplification and demonstrations, just can measure some fundamental quantities of shelf depreciation, as apparent charge amount etc.
Above-mentioned is measuring method and the principle that this utility model pulse current method is measured shelf depreciation, due to ultrasonic Detection Method and the collection of ultrahigh frequency detection method is all voice signal or electromagnetic signal, these detection methods need not be changed hookup, and its measuring system only need be labelled to sensor transformer corresponding site (fuel tank internal or fuel tank are outside) and can measure.If therefore need to carry out measurement of partial discharge by ultrahigh frequency, supercritical ultrasonics technology, other positions of this utility model are constant, only need to be by inner or outside ultrasonic, the ultrahigh frequency measuring system accordingly that increases of oil tank of transformer.
These are only embodiment of the present utility model, be not limited to the utility model, therefore, all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in claim scope of the present utility model.
Claims (3)
1. the test platform of a partial discharge test needle plate model, whole test platform is positioned in a testing transformer, it is characterized in that: this test platform is comprised of a memory alloy spring, metal needle, insulating board, metallic support platform, insulating support, wherein memory alloy spring is positioned in a temperature-controlled box, memorial alloy adopts endogenous bidirectional memory to recover alloy, can regulate the distance of metal needle and insulating board, thereby change insulation distance size; One end joint test power supply of metal needle, serves as the high-field electrode part in apparatus local discharge process; Below metal needle, lay a metallic support platform, this platform can play a supportive role, and also can serve as the low-field electrode part in shelf depreciation process; Between metallic support platform and metal needle, place insulating board; Metallic support platform is insulated support and is fixed in insulating oil, and guarantees this metallic support platform effective grounding.
2. the test platform of partial discharge test needle plate model according to claim 1, is characterized in that, metal needle is used copper pin.
3. the test platform of partial discharge test needle plate model according to claim 1, is characterized in that, metallic support platform adopts copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320459017.4U CN203465379U (en) | 2013-07-30 | 2013-07-30 | Test platform for pin plate model of partial discharge test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320459017.4U CN203465379U (en) | 2013-07-30 | 2013-07-30 | Test platform for pin plate model of partial discharge test |
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| Publication Number | Publication Date |
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| CN203465379U true CN203465379U (en) | 2014-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320459017.4U Expired - Lifetime CN203465379U (en) | 2013-07-30 | 2013-07-30 | Test platform for pin plate model of partial discharge test |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104049186A (en) * | 2014-06-04 | 2014-09-17 | 国家电网公司 | Adjustable needle plate defect model for high-voltage tests |
| 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 |
| CN106771937A (en) * | 2017-02-27 | 2017-05-31 | 厦门理工学院 | A kind of novel local discharge test platform |
| CN106772178A (en) * | 2016-12-12 | 2017-05-31 | 国网北京市电力公司 | The calibration equipment of high frequency electric live testing apparatus for local discharge, method and device |
| CN107966869A (en) * | 2017-12-18 | 2018-04-27 | 华北电力大学 | A kind of light filling exposure method for being used to shoot transformer oilpaper Interface Current note |
| CN109490654A (en) * | 2018-07-13 | 2019-03-19 | 中国航空工业集团公司济南特种结构研究所 | A kind of multilayer FSS screen thunder and lightning coupling effect experimental rig and test method |
| CN114518513A (en) * | 2022-02-24 | 2022-05-20 | 哈尔滨理工大学 | Dry-type air-core reactor turn-to-turn insulation test model and preparation method thereof |
| CN114563663A (en) * | 2022-01-18 | 2022-05-31 | 山东大学 | Experimental device and method for discharging in transformer oil under alternating voltage |
-
2013
- 2013-07-30 CN CN201320459017.4U patent/CN203465379U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104049186A (en) * | 2014-06-04 | 2014-09-17 | 国家电网公司 | Adjustable needle plate defect model for high-voltage tests |
| 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 |
| CN106772178A (en) * | 2016-12-12 | 2017-05-31 | 国网北京市电力公司 | The calibration equipment of high frequency electric live testing apparatus for local discharge, method and device |
| CN106771937A (en) * | 2017-02-27 | 2017-05-31 | 厦门理工学院 | A kind of novel local discharge test platform |
| CN107966869A (en) * | 2017-12-18 | 2018-04-27 | 华北电力大学 | A kind of light filling exposure method for being used to shoot transformer oilpaper Interface Current note |
| CN109490654A (en) * | 2018-07-13 | 2019-03-19 | 中国航空工业集团公司济南特种结构研究所 | A kind of multilayer FSS screen thunder and lightning coupling effect experimental rig and test method |
| CN114563663A (en) * | 2022-01-18 | 2022-05-31 | 山东大学 | Experimental device and method for discharging in transformer oil under alternating voltage |
| CN114518513A (en) * | 2022-02-24 | 2022-05-20 | 哈尔滨理工大学 | Dry-type air-core reactor turn-to-turn insulation test model and preparation method thereof |
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Granted publication date: 20140305 |