CN102928681A - Device for measuring oil-flow electrification characteristic of insulating oil - Google Patents
Device for measuring oil-flow electrification characteristic of insulating oil Download PDFInfo
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- CN102928681A CN102928681A CN 201210479076 CN201210479076A CN102928681A CN 102928681 A CN102928681 A CN 102928681A CN 201210479076 CN201210479076 CN 201210479076 CN 201210479076 A CN201210479076 A CN 201210479076A CN 102928681 A CN102928681 A CN 102928681A
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Abstract
A device for measuring the oil-flow electrification characteristic of insulating oil belongs to the technical field of high voltage and insulating, and solves the problem that at present, an indirect measurement method adopted for measuring the oil-flow electrification characteristic of insulating oil is large in measuring error. The device adopts the structure that the output pipeline of a buffer container is communicated with the oil inlet of a flowmeter through a circulating pump, a flow rate regulating valve and the circulating pump are arranged in a parallelly connected manner, the oil outlet of the flowmeter is communicated with the oil inlet of a relaxation box through the pipeline, the oil outlet of the relaxation box is communicated with the oil inlet of an oil flow charged box, the oil outlet of the oil flow charged box is communicated with the oil inlet of a charge measurement box, the oil outlet of the charge measurement box is communicated with the oil inlet of the buffer container, and a charge test joint of the charge measurement box is connected with the test end of a charge tester. The device provided by the invention is suitable for measuring the oil-flow electrification characteristic of insulating oil.
Description
Technical field
The present invention relates to a kind of insulating oil oil flow electrification characteristic measuring device, belong to the high voltage and insulation technology field.
Background technology
Along with the sustainable growth of national economy, the demand of the energy is improved day by day, the high voltage long distance power transmission has become the strategic issue that affects economic development.The extra-high voltage grid construction has become the main points of working energy.The raising of transformer voltage grade is so that more and more higher to transformer insulated requirement, and the at present interior insulation of transformer is carried on as before owing to manufacturing process and insulating property etc. are former and adopted paper oil insulation as principal mode.Increase along with transformer capacity, requirement to the transformer heat dispersion also improves greatly, past often adopts the way that increases flow velocity to improve radiating efficiency, and paper oil insulation has huge drawback---oil flow electrification under high flow rate, Chinese scholars and transformer manufacturer once adopted methods such as increasing the electric charge inhibitor in the oil to attempt to suppress its charged degree for this reason, but effect is all undesirable.The ways that increase oil clearance and reduce flow velocity that adopt are controlled its charged degree more in the modern design of transformer, have obtained comparatively effectively effect.But the principle to oil flow electrification there is no system's explanation, and opinions vary, can't thoroughly eradicate the oil flow electrification phenomenon, therefore still needs study it.
When Chinese scholars is measured the oil flow electrification characteristic of transformer oil in the past, adopt the leakage current of measuring on the cardboards indirectly measure in the oil electrically charged, its shortcoming is that electric charge is easily located to leak along flange etc. and caused measuring error in the measuring process, and the measuring position is positioned at oil flow electrification case place, with the forceful electric power close together, so the interference that measuring-signal is subject to is stronger.
Summary of the invention
The present invention adopts indirect measurement method to measure in order to solve to have now to insulating oil oil flow electrification characteristic, and the problem that measuring error is larger provides a kind of insulating oil oil flow electrification characteristic measuring device.
Insulating oil oil flow electrification characteristic measuring device of the present invention, it comprises buffer container, ebullator, flow rate regulating valve, flowmeter, lax case, oil flow electrification case, electric charge tester and charge measurement case,
The output pipe of buffer container is communicated with the oil-in of flowmeter by ebullator, flow rate regulating valve and ebullator are arranged in parallel, the oil-out of flowmeter is communicated with the oil-in of lax case by pipeline, the oil-out of lax case is communicated with by the oil-in of pipeline with the oil flow electrification case, the oil-out of oil flow electrification case is communicated with by the oil-in of pipeline with the charge measurement case, and the oil-out of charge measurement case is communicated with the oil-in of buffer container by pipeline;
The electric charge test splice of charge measurement case is connected with the test lead of electric charge tester.
It also comprises earth stud, and this earth stud is fixed on lax case outside surface,
In the described lax case stainless (steel) wire is set, this stainless (steel) wire and earth stud electrical connection, this earth stud is used for being connected with the earth.
Be provided with cardboard in the oil flow electrification case.
The charge measurement case is comprised of electric charge test splice, stainless steel drum, insulation filling layer, radome, two insulated end covers, insulated enclosure pad, charge-trapping net, vent valve and insulating mats,
Stainless steel drum and the coaxial formation measuring cylinder that arranges of radome, radome and the earth electrical connection, fill the insulation filling layer between stainless steel drum and the radome, described measuring cylinder two ends are insulated end cover of airtight connection respectively, insulated end cover is fixedly connected with the insulation filling layer by bolt, the insulated enclosure pad is set between the surface of contact of this bolt and insulation filling layer and insulated end cover, the center of an insulated end cover has oil-in, the internal communication of this oil-in and stainless steel drum, the center of another insulated end cover has oil-out, the internal communication of this oil-out and stainless steel drum;
On the sidewall of measuring cylinder vent valve is set, between the surface of contact of vent valve and measuring cylinder insulating mat is set;
The charge-trapping net is set in the stainless steel drum, and the charge-trapping net connects the electric charge test splice, and the electric charge test splice is positioned at the insulation filling layer.
Described insulated end cover is the teflon end cap.
Described charge-trapping net is stainless (steel) wire.
Described all pipelines are stainless-steel seamless pipe.
Advantage of the present invention is: the present invention has simulated under the high-power transformer operating mode, the insulating oil oil flow electrification process of oil-paper combination insulation, effect by ebullator makes insulating oil enter lax case with the electrically charged abundant leakage of institute, thereby then enter oil flow electrification case and charged with the cardboard friction in it, insulating oil after charged enters the charge measurement case, and electric charge is caught by the charge-trapping net in the case, thereby measures the charged characteristic that obtains insulating oil by the electric charge tester.
The present invention is the Control experiment variable accurately, effectively simulate the real transformer insulation status, by directly being measured, charged insulating oil reduced measuring error, and the charge measurement case is carried out the measures such as electrical isolation and shielding, reduced the impact of outer signals on measurement result, thereby be conducive to sum up the paper insulated charged characteristic of transformer oil, support and theoretical direction for the design production of real transformer provides basic data.
Description of drawings
Fig. 1 is theory diagram of the present invention;
Fig. 2 is the structural representation of measurement mechanism of the present invention;
Fig. 3 is the structural representation of charge measurement case.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1 to Fig. 3, the described insulating oil oil flow electrification of present embodiment characteristic measuring device, it comprises buffer container 1, ebullator 2, flow rate regulating valve 3, flowmeter 4, lax case 5, oil flow electrification case 8, electric charge tester 9 and charge measurement case 10
The output pipe of buffer container 1 is communicated with the oil-in of flowmeter 4 by ebullator 2, flow rate regulating valve 3 is arranged in parallel with ebullator 2, the oil-out of flowmeter 4 is communicated with by the oil-in of pipeline with lax case 5, the oil-out of lax case 5 is communicated with by the oil-in of pipeline with oil flow electrification case 8, the oil-out of oil flow electrification case 8 is communicated with by the oil-in of pipeline with charge measurement case 10, and the oil-out of charge measurement case 10 is communicated with by the oil-in of pipeline with buffer container 1;
The electric charge test splice 10-1 of charge measurement case 10 is connected with the test lead of electric charge tester 9.
In the present embodiment, buffer container 1 is used for housing insulation oil, and under the effect of ebullator 2, insulating oil flows into lax case 5, and electrically charged being fully absorbed of insulating oil in lax case 5 makes insulating oil be electric neutrality.Uncharged insulating oil flows into oil flow electrification case 8 behind lax case 5, cardboard frictional electrification in oil flow electrification case 8 in it, charged insulating oil flows into charge measurement case 10 and carries out the measurement of insulating oil charged characteristic, be full of the charge-trapping net 10-7 that stainless (steel) wire forms in the charge measurement case 10, inflow buffer container 1 was proceeded circulation after insulating oil flowed out from charge measurement case 10.
The electric charge that 9 pairs of charge measurement casees 10 of electric charge tester are caught is measured the measurement that realizes the oil flow electrification characteristic, and the process of 10 pairs of charge-trappings of charge measurement case catches realization by fill stainless (steel) wire in case to insulating oil institute is electrically charged.
Embodiment two: below in conjunction with Fig. 2 present embodiment is described, present embodiment is for to the further specifying of embodiment one, and present embodiment also comprises earth stud 7, and this earth stud 7 is fixed on lax case 5 outside surfaces,
The described lax case 5 interior stainless (steel) wires 6 that arrange, this stainless (steel) wire 6 is used for being connected with the earth with earth stud 7 electrical connections, this earth stud 7.
Stainless (steel) wire 6 by earth stud 7 ground connection, can fully be discharged electric charge in order to reduce the impact that measurement causes on subsequent charge.
Embodiment three: present embodiment is provided with cardboard for to the further specifying of embodiment one or two in the oil flow electrification case 8.
Embodiment four: present embodiment is described below in conjunction with Fig. 2 and Fig. 3, present embodiment is for to embodiment one, two or three further specify, charge measurement case 10 is comprised of electric charge test splice 10-1, stainless steel drum 10-2, insulation filling layer 10-3, radome 10-4, two insulated end cover 10-5, insulated enclosure pad 10-6, charge-trapping net 10-7, vent valve 10-8 and insulating mat 10-9
Stainless steel drum 10-2 and the coaxial formation measuring cylinder that arranges of radome 10-4, radome 10-4 and the earth electrical connection, fill insulation filling layer 10-3 between stainless steel drum 10-2 and the radome 10-4, described measuring cylinder two ends are insulated end cover 10-5 of airtight connection respectively, insulated end cover 10-5 is fixedly connected with insulation filling layer 10-3 by bolt, insulated enclosure pad 10-6 is set between the surface of contact of this bolt and insulation filling layer 10-3 and insulated end cover 10-5, the center of an insulated end cover 10-5 has oil-in, the internal communication of this oil-in and stainless steel drum 10-2, the center of another insulated end cover 10-5 has oil-out, the internal communication of this oil-out and stainless steel drum 10-2;
Vent valve 10-8 is set on the sidewall of measuring cylinder, insulating mat 10-9 is set between the surface of contact of vent valve 10-8 and measuring cylinder;
Charge-trapping net 10-7 is set in the stainless steel drum 10-2, and charge-trapping net 10-7 connects electric charge test splice 10-1, and electric charge test splice 10-1 is positioned at insulation filling layer 10-3.
In the present embodiment, stainless steel drum 10-2 outside surface is insulated packed layer 10-3 and fills covering, insulation filling layer 10-3 coated outside radome 10-4, radome 10-4 ground connection; Charge measurement case 10 two ends are by insulated end cover 10-5 insulated enclosure; The effect of electrical isolation between charge measurement case 10 and the external environment is played in these measures, has reduced simultaneously the undesired signal of external environment condition to the impact of oil flow electrification feature measurement.
The electric charge of being caught by charge-trapping net 10-7 after tested line is introduced electric charge tester 9 by electric charge test splice 10-1 and is carried out the insulating oil carried charge and measure, thereby realizes the measurement of insulating oil charged characteristic.
In the present embodiment, charge measurement case 10 outer walls are comprised of stainless steel drum 10-2 and insulated end cover 10-5, insulated enclosure pad 10-6 is used for making between charge measurement case 10 outer walls and the bolt and insulate, and plays the effect of electrical isolation between charge measurement case 10 and the external environment.Keep insulation with insulating mat 10-9 between radome 10-4 and the vent valve 10-8.
Embodiment five: present embodiment is for to the further specifying of embodiment four, and described insulated end cover 10-5 is the teflon end cap.
Embodiment six: present embodiment is for to the further specifying of embodiment four or five, and described charge-trapping net 10-7 is stainless (steel) wire.
Embodiment seven: present embodiment is for to embodiment one, two, three, four, five or six further specify, and described all pipelines are stainless-steel seamless pipe.
Present embodiment adopts stainless-steel seamless pipe successively above-mentioned each parts to be connected, thereby consists of closed cycle system.
Claims (7)
1. insulating oil oil flow electrification characteristic measuring device, it is characterized in that: it comprises buffer container (1), ebullator (2), flow rate regulating valve (3), flowmeter (4), lax case (5), oil flow electrification case (8), electric charge tester (9) and charge measurement case (10)
The output pipe of buffer container (1) is communicated with the oil-in of flowmeter (4) by ebullator (2), flow rate regulating valve (3) is arranged in parallel with ebullator (2), the oil-out of flowmeter (4) is communicated with by the oil-in of pipeline with lax case (5), the oil-out of lax case (5) is communicated with by the oil-in of pipeline with oil flow electrification case (8), the oil-out of oil flow electrification case (8) is communicated with by the oil-in of pipeline with charge measurement case (10), and the oil-out of charge measurement case (10) is communicated with by the oil-in of pipeline with buffer container (1);
The electric charge test splice (10-1) of charge measurement case (10) is connected with the test lead of electric charge tester (9).
2. insulating oil oil flow electrification characteristic measuring device according to claim 1, it is characterized in that: it also comprises earth stud (7), this earth stud (7) is fixed on lax case (5) outside surface,
Stainless (steel) wire (6) is set in the described lax case (5), and this stainless (steel) wire (6) is used for being connected with the earth with earth stud (7) electrical connection, this earth stud (7).
3. insulating oil oil flow electrification characteristic measuring device according to claim 1 and 2, it is characterized in that: the oil flow electrification case is provided with cardboard in (8).
4. insulating oil oil flow electrification characteristic measuring device according to claim 3, it is characterized in that: charge measurement case (10) is comprised of electric charge test splice (10-1), stainless steel drum (10-2), insulation filling layer (10-3), radome (10-4), two insulated end covers (10-5), insulated enclosure pad (10-6), charge-trapping net (10-7), vent valve (10-8) and insulating mat (10-9)
Stainless steel drum (10-2) and the coaxial formation measuring cylinder that arranges of radome (10-4), radome (10-4) and the earth electrical connection, fill insulation filling layer (10-3) between stainless steel drum (10-2) and the radome (10-4), described measuring cylinder two ends are an insulated end cover of airtight connection (10-5) respectively, insulated end cover (10-5) is fixedly connected with insulation filling layer (10-3) by bolt, between the surface of contact of this bolt and insulation filling layer (10-3) and insulated end cover (10-5) insulated enclosure pad (10-6) is set, the center of an insulated end cover (10-5) has oil-in, the internal communication of this oil-in and stainless steel drum (10-2), the center of another insulated end cover (10-5) has oil-out, the internal communication of this oil-out and stainless steel drum (10-2);
Vent valve (10-8) is set on the sidewall of measuring cylinder, insulating mat (10-9) is set between the surface of contact of vent valve (10-8) and measuring cylinder;
Charge-trapping net (10-7) is set in the stainless steel drum (10-2), and charge-trapping net (10-7) connects electric charge test splice (10-1), and electric charge test splice (10-1) is positioned at insulation filling layer (10-3).
5. insulating oil oil flow electrification characteristic measuring device according to claim 4, it is characterized in that: described insulated end cover (10-5) is the teflon end cap.
6. insulating oil oil flow electrification characteristic measuring device according to claim 4, it is characterized in that: described charge-trapping net (10-7) is stainless (steel) wire.
7. according to claim 1,2,4,5 or 6 described insulating oil oil flow electrification characteristic measuring devices, it is characterized in that: described all pipelines are stainless-steel seamless pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201210479076 CN102928681A (en) | 2012-11-22 | 2012-11-22 | Device for measuring oil-flow electrification characteristic of insulating oil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210479076 CN102928681A (en) | 2012-11-22 | 2012-11-22 | Device for measuring oil-flow electrification characteristic of insulating oil |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207359A (en) * | 2013-04-12 | 2013-07-17 | 广东电网公司电力科学研究院 | Plate electrode device for measuring electric characteristics of oil flow |
| CN104133122A (en) * | 2014-07-04 | 2014-11-05 | 中国石油化工股份有限公司 | Oil product static-electricity online monitor |
| CN106249065A (en) * | 2016-08-02 | 2016-12-21 | 江西理工大学 | A kind of analogue measurement device |
| CN104007328B (en) * | 2014-04-11 | 2017-02-08 | 中国石油化工股份有限公司青岛安全工程研究院 | Portable charge density measurement device for oil product |
| CN109188056A (en) * | 2018-10-25 | 2019-01-11 | 国网黑龙江省电力有限公司电力科学研究院 | Without oil flow electrification characteristic detection device and its detection method when applying electric field outside |
| CN110389261A (en) * | 2018-04-19 | 2019-10-29 | 中国石油化工股份有限公司 | For monitoring the device of liquid line electrostatic charge density |
| CN113358943A (en) * | 2021-04-30 | 2021-09-07 | 上海工程技术大学 | Oil flow electrification measuring device and full-section charge measuring method |
| CN114487360A (en) * | 2022-02-17 | 2022-05-13 | 国家电网有限公司特高压建设分公司 | Gas content detector for insulating oil and control method thereof |
-
2012
- 2012-11-22 CN CN 201210479076 patent/CN102928681A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207359B (en) * | 2013-04-12 | 2015-10-28 | 广东电网公司电力科学研究院 | For the slab construction electrode assembly of oil flow electrification feature measurement |
| CN103207359A (en) * | 2013-04-12 | 2013-07-17 | 广东电网公司电力科学研究院 | Plate electrode device for measuring electric characteristics of oil flow |
| CN104007328B (en) * | 2014-04-11 | 2017-02-08 | 中国石油化工股份有限公司青岛安全工程研究院 | Portable charge density measurement device for oil product |
| CN104133122A (en) * | 2014-07-04 | 2014-11-05 | 中国石油化工股份有限公司 | Oil product static-electricity online monitor |
| CN104133122B (en) * | 2014-07-04 | 2017-01-11 | 中国石油化工股份有限公司 | Oil product static-electricity online monitor |
| CN106249065A (en) * | 2016-08-02 | 2016-12-21 | 江西理工大学 | A kind of analogue measurement device |
| CN106249065B (en) * | 2016-08-02 | 2019-01-18 | 江西理工大学 | A kind of analogue measurement device |
| CN110389261B (en) * | 2018-04-19 | 2021-09-10 | 中国石油化工股份有限公司 | Device for monitoring electrostatic charge density of liquid pipeline |
| CN110389261A (en) * | 2018-04-19 | 2019-10-29 | 中国石油化工股份有限公司 | For monitoring the device of liquid line electrostatic charge density |
| CN109188056A (en) * | 2018-10-25 | 2019-01-11 | 国网黑龙江省电力有限公司电力科学研究院 | Without oil flow electrification characteristic detection device and its detection method when applying electric field outside |
| CN113358943A (en) * | 2021-04-30 | 2021-09-07 | 上海工程技术大学 | Oil flow electrification measuring device and full-section charge measuring method |
| CN113358943B (en) * | 2021-04-30 | 2023-03-14 | 上海工程技术大学 | Oil flow electrification measuring device and full-section charge measuring method |
| CN114487360A (en) * | 2022-02-17 | 2022-05-13 | 国家电网有限公司特高压建设分公司 | Gas content detector for insulating oil and control method thereof |
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Application publication date: 20130213 |