CN103983904A - Oil path system of suspension transport microbubble partial discharge simulation experiment device in transformer oil - Google Patents
Oil path system of suspension transport microbubble partial discharge simulation experiment device in transformer oil Download PDFInfo
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- CN103983904A CN103983904A CN201410251960.5A CN201410251960A CN103983904A CN 103983904 A CN103983904 A CN 103983904A CN 201410251960 A CN201410251960 A CN 201410251960A CN 103983904 A CN103983904 A CN 103983904A
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Abstract
The invention discloses an oil path system of a suspension transport microbubble partial discharge simulation experiment device in transformer oil. The oil path system comprises a simulated oil path (7), a circulating pump (6) and a heating pipe (2), wherein the simulated oil path (7) is connected with the circulating pump (6) and the heating pipe (2) through a pipeline to form an oil path circulating loop. The oil path system is characterized in that a pressure meter (5) is arranged on the pipeline, an oil injecting hole (8) and a vacuumizing connector (9) are formed in the pipeline, the oil injecting hole (8) is communicated with a vacuum oil injecting device (3), the vacuumizing connector (9) is connected with an air bag (41) filled with a defined amount of air through an air extraction valve (4), and an air inlet of the simulated oil path (7) is provided with a fixed-mesh screen (1). The oil path system has the following advantages that bubbles can be injected in an oil path to simulate defects of suspension and movement microbubbles in the transformer oil, and the adjustment for sizes of the microbubbles can be realized.
Description
Technical field
The present invention relates to a kind of transformer oil partial discharge simulation experiment device, be specifically related to the oil piping system of suspended microbubble partial discharge simulation experiment device in a kind of transformer oil.
Background technology
Pure transformer oil insulating property are good, and in the time there is microbubble in oil, its insulating property can decline greatly.In oil-immersed power transformer operational process, due to internal firmware and insulating material absorption, vacuum oil is not good enough, the factors such as mechanical vibration in service and seal aging, and there is shelf depreciation in transformer inside, when the fault such as high-energy discharge and local overheating, can cause transformer oil directly cracking to occur and produce various minimum gas, form the microbubble of suspended state because the specific inductive capacity of bubble is less than the specific inductive capacity of transformer oil, Electric Field Distribution is inversely proportional to the specific inductive capacity of insulating medium again, make in the electric field ratio transformer oil in bubble much higher, and the electric strength of bubble is more much lower than transformer oil, thereby cause especially easily discharging in bubble, and then cause partial breakdown, threaten transformer security of operation.
Chinese patent literature CN101793939A discloses a kind of partial discharge simulation experiment device of suspended metal particles in oil of transformer, and it comprises induction voltage regulator (T1), halo-free testing transformer (T2), puts protective resistance (R), standard capacitor divider (C1, C2), shelf depreciation generating means, ultra-high frequency antenna, noninductive detection resistance, concentric cable, wideband high speed vast capacity digital storage oscilloscope without office.The moving metal particulate that suspends in this patent energy analogue transformer oil AC field effect at different field intensity, oily Flow Velocity, temperature produces shelf depreciation, but it can not simulation test transformer oil in suspended microbubble shelf depreciation.
" suspended bubble Characteristics of Partial Discharge in insulating oil "; Tang Ju, Zhu Liming, fiber crops are in mourning, Zhou Jiabin, Chen Changjie; " High-Voltage Technology " the 36th the 6th phase of volume; the 1341st page to the 1346th page; disclose in June, 2010 a kind of " Partial Discharge Measurement System ", it by induction voltage regulator, halo-free testing transformer, put protective resistance, standard capacitor divider, shelf depreciation generating means, local discharge detection device without office and form.This device can be simulated suspended bubble in oil, extracts a certain amount of oil out filling in oily oil duct, gas is entered in oil duct and by oil pump and bubble is broken up and is evenly distributed in electric discharge oil duct.This device can change field intensity by transformer, regulate the influence factors such as temperature by heating resistor and study the impact of flow velocity on electric discharge, but because this device adopts the mode of direct oiling, may make to exist in device certain air gap, cannot ensure to be full of the pure oil of engineering adding before contaminant particles in device, to adding the experimental result after impurity to cause certain influence; In addition, this device can not be controlled the size of bubble, cannot study the impact of Air Bubble Size on electric discharge, therefore cannot the affect mechanism of the suspended microbubble of accurate study on shelf depreciation in transformer oil.
Summary of the invention
The problem existing for prior art, technical matters to be solved by this invention is just to provide the oil piping system of suspended microbubble partial discharge simulation experiment device in a kind of transformer oil, it can inject bubble in oil circuit, suspension, mobile microbubble defect in analogue transformer oil, and can realize the adjusting to microbubble size, thereby the relation of research local discharge signal and microbubble size, for PD Pattern Recognition and the fault diagnosis of microbubble defect in transformer provide reliable experimental data.
Technical matters to be solved by this invention is to realize by such technical scheme, it comprises simulation oil duct, ebullator and heating tube, simulation oil duct and ebullator and heating tube connect into oil duct closed circuit by pipeline, rain glass is housed on pipeline, on pipeline, be provided with pouring orifice and vacuumize interface, pouring orifice is communicated with vacuum oiling device, vacuumizes interface and be connected to by extraction valve the airbag of quantitative gas, is provided with and determines eye mesh screen at the oil-in of simulation oil duct.
Vacuum oiling device comprises storage tank, and storage tank connects filling pump by the first inlet valve, and filling pump is received the pouring orifice of pipeline again by the second inlet valve.
In the time adding bubble, open the first inlet valve, the second inlet valve and extraction valve, filling pump is oppositely oil pumping from oil duct closed circuit, and the gas in airbag is sucked in oil duct closed circuit, filling pump is out of service, closes the first inlet valve, the second inlet valve and extraction valve; ON cycle pump, makes transformer oil drive bubble to flow at oil duct closed circuit, the filtration of bubble by determining eye mesh screen with separate, realized the control of the size of suspended microbubble; Suspended microbubble enters in simulation oil duct and carries out discharge test.
Owing to having adopted technique scheme, the present invention has advantages of as follows: can in oil circuit, inject bubble, and suspension, mobile microbubble defect in analogue transformer oil, and can realize the adjusting to microbubble size.
Brief description of the drawings
Brief description of the drawings of the present invention is as follows:
Fig. 1 is structural representation of the present invention;
Fig. 2 is the curve map that the voltage breakdown of transformer oil changes with gas content.
In figure: 1. determine eye mesh screen; 2. heating tube; 3. vacuum oiling device; 31. first inlet valves; 32. filling pumps; 33. second inlet valves; 34. storage tank; 4. extraction valve; 41. airbags; 5. rain glass; 6. ebullator; 7. simulation oil duct; 8. pouring orifice; 9. vacuumize interface.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
As shown in Figure 1, the present invention includes simulation oil duct 7, ebullator 6 and heating tube 2, simulation oil duct 7 connects into oil duct closed circuit with ebullator 6 and heating tube 2 by pipeline, rain glass 5 is housed on pipeline, on pipeline, be provided with pouring orifice 8 and vacuumize interface 9, pouring orifice 8 is communicated with vacuum oiling device 3, vacuumizes interface 9 and be connected to by extraction valve 4 airbag 41 of quantitative gas, is provided with and determines eye mesh screen 1 at the oil-in of simulation oil duct 7.
Above-mentioned vacuum oiling device 3 comprises storage tank 34, and storage tank 34 connects filling pump 32 by the first inlet valve 31, and filling pump 32 is connected pouring orifice 8 by the second inlet valve 33 again.
In the time adding bubble, open the first inlet valve 31, the second inlet valve 33 and extraction valve 4, filling pump 32 is oppositely oil pumping from oil duct closed circuit, and the gas in airbag 41 is sucked in oil duct closed circuit, filling pump 32 is out of service, closes the first inlet valve 31, the second inlet valve 33 and extraction valve 4; ON cycle pump 6, makes transformer oil drive bubble to flow at oil duct closed circuit, the filtration of bubble by determining eye mesh screen 1 with separate, realized the control of the size of suspended microbubble; Suspended microbubble enters in simulation oil duct and carries out discharge test.In simulation oil duct, effluve generating means is housed, this device is specifically designed to the discharge test to mobiloil in simulation oil duct
The transformer oil heating of heating tube 2 to oil duct closed circuit, to test the discharge parameter under different oil temperatures; Ebullator 6 can change the oil speed in oil duct closed circuit, so as test under different in flow rate discharge parameter.
Above-mentioned airbag 41 use vacuum pumps are replaced.
When to oil duct closed circuit vacuum oil, with vacuum pump replacement airbag 41, open extraction valve 4, vacuum pump starts, and outwards bleeds, and the first inlet valve 31 of vacuum oiling device 3, the second inlet valve 33 are opened, filling pump 32 is to the oiling of oil duct closed circuit, complete vacuum oil, can ensure in experimental provision, not exist in oiling process residual air gap, thereby guarantee that oil duct closed circuit is pure transformer oil.
Apply transformer oil test experience of the present invention:
Keep room temperature constant, immobilizing of discharge plate, for carrying out disruptive discharge test under gas with various content, gas content in transformer oil is got respectively 150ml, 600ml, 1200ml, 1500ml, 1800ml and 2100ml, carry out respectively the disruptive discharge test of transformer oil under static and flow state, voltage breakdown under test corresponding state, test findings as shown in Figure 2.As can be seen from Figure 2, gas content in transformer oil increases, and voltage breakdown declines, insulativity variation; Under identical gas content, transformer oil is greater than stationary state in the voltage breakdown under flow state, and the insulativity in the static situation of transformer oil is poor.
In test experience, can change and determine eye mesh screen 1, to change the size of bubble, thus the impact of test Air Bubble Size on transformer oil insulativity.So the present invention can accurately test the impact of transformer bubble in oil on insulating property.
Claims (3)
1. the oil piping system of suspended microbubble partial discharge simulation experiment device in transformer oil, comprise simulation oil duct (7), ebullator (6) and heating tube (2), simulation oil duct (7) connects into oil duct closed circuit with ebullator (6) and heating tube (2) by pipeline, it is characterized in that: rain glass (5) is housed on pipeline, on pipeline, be provided with pouring orifice (8) and vacuumize interface (9), pouring orifice (8) is communicated with vacuum oiling device (3), vacuumize interface (9) is connected to quantitative gas airbag (41) by extraction valve (4), be provided with and determine eye mesh screen (1) at the oil-in of simulation oil duct (7).
2. the oil piping system of suspended microbubble partial discharge simulation experiment device in transformer oil according to claim 1, it is characterized in that: described vacuum oiling device (3) comprises storage tank (34), storage tank (34) connects filling pump (32) by the first inlet valve (31), and filling pump (32) is connected pouring orifice (8) by the second inlet valve (33) again.
3. the oil piping system of suspended microbubble partial discharge simulation experiment device in transformer oil according to claim 1 and 2, is characterized in that: described airbag (41) is replaced with vacuum pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410251960.5A CN103983904B (en) | 2014-06-09 | 2014-06-09 | The oil piping system of suspended microbubble partial discharge simulation experiment device in transformer oil |
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| CN201410251960.5A CN103983904B (en) | 2014-06-09 | 2014-06-09 | The oil piping system of suspended microbubble partial discharge simulation experiment device in transformer oil |
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| CN103983904A true CN103983904A (en) | 2014-08-13 |
| CN103983904B CN103983904B (en) | 2016-10-19 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467279A (en) * | 2015-03-16 | 2016-04-06 | 华北电力大学 | Transformer internal bubble electric discharge model |
| CN106054043A (en) * | 2016-08-15 | 2016-10-26 | 广东电网有限责任公司电力科学研究院 | Oil gap insulation discharge testing platform |
| CN106241714A (en) * | 2016-09-19 | 2016-12-21 | 中国海洋石油总公司 | A kind of portable injection system |
| CN107561419A (en) * | 2017-08-24 | 2018-01-09 | 西南交通大学 | A kind of appraisal procedure of oil-immersed sleeve pipe insulation bubble effect risk |
| CN108107291A (en) * | 2017-12-15 | 2018-06-01 | 哈尔滨理工大学 | A kind of transformer oil paper insulation is multifactor to combine ageing test apparatus and its life-span prediction method |
| CN109324275A (en) * | 2018-12-14 | 2019-02-12 | 国网山东省电力公司电力科学研究院 | A kind of suspended particle partial discharge test method in flowing transformer oil |
| CN109596950A (en) * | 2018-12-13 | 2019-04-09 | 国网山东省电力公司电力科学研究院 | Microbubble Discharge Simulation experimental provision in a kind of flowing transformer oil |
| CN112345899A (en) * | 2020-11-19 | 2021-02-09 | 西安西电变压器有限责任公司 | Bubble discharge experimental apparatus in insulating oil flows |
| CN112923977A (en) * | 2021-02-05 | 2021-06-08 | 中国矿业大学 | Device and method for observing dynamic behaviors of impurities with different particle sizes in oil passage of transformer |
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| CN103105287A (en) * | 2011-11-10 | 2013-05-15 | 罗伟 | Ground-based simulation testing device of packer |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467279A (en) * | 2015-03-16 | 2016-04-06 | 华北电力大学 | Transformer internal bubble electric discharge model |
| CN105467279B (en) * | 2015-03-16 | 2018-12-18 | 华北电力大学 | A kind of inside transformer bubble electric discharge model |
| CN106054043A (en) * | 2016-08-15 | 2016-10-26 | 广东电网有限责任公司电力科学研究院 | Oil gap insulation discharge testing platform |
| CN106241714A (en) * | 2016-09-19 | 2016-12-21 | 中国海洋石油总公司 | A kind of portable injection system |
| CN107561419A (en) * | 2017-08-24 | 2018-01-09 | 西南交通大学 | A kind of appraisal procedure of oil-immersed sleeve pipe insulation bubble effect risk |
| CN108107291A (en) * | 2017-12-15 | 2018-06-01 | 哈尔滨理工大学 | A kind of transformer oil paper insulation is multifactor to combine ageing test apparatus and its life-span prediction method |
| CN108107291B (en) * | 2017-12-15 | 2024-03-26 | 哈尔滨理工大学 | Transformer oil paper insulation multi-factor combined aging test device and service life prediction method thereof |
| CN109596950B (en) * | 2018-12-13 | 2021-03-19 | 国网山东省电力公司电力科学研究院 | Microbubble simulation experiment device that discharges in flowing transformer oil |
| CN109596950A (en) * | 2018-12-13 | 2019-04-09 | 国网山东省电力公司电力科学研究院 | Microbubble Discharge Simulation experimental provision in a kind of flowing transformer oil |
| CN109324275A (en) * | 2018-12-14 | 2019-02-12 | 国网山东省电力公司电力科学研究院 | A kind of suspended particle partial discharge test method in flowing transformer oil |
| CN112345899A (en) * | 2020-11-19 | 2021-02-09 | 西安西电变压器有限责任公司 | Bubble discharge experimental apparatus in insulating oil flows |
| CN112923977A (en) * | 2021-02-05 | 2021-06-08 | 中国矿业大学 | Device and method for observing dynamic behaviors of impurities with different particle sizes in oil passage of transformer |
| CN112923977B (en) * | 2021-02-05 | 2022-03-29 | 中国矿业大学 | Device and method for observing dynamic behaviors of impurities with different particle sizes in oil passage of transformer |
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Effective date of registration: 20200122 Address after: 400044 Shapingba District Sha Street, No. 174, Chongqing Co-patentee after: ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID Patentee after: Chongqing University Address before: 400044 Shapingba District Sha Street, No. 174, Chongqing Patentee before: Chongqing University |
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