CN104820175A - Device and experimental method for researching insulating property of micro water containing SF6 gas - Google Patents
Device and experimental method for researching insulating property of micro water containing SF6 gas Download PDFInfo
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- CN104820175A CN104820175A CN201510230183.0A CN201510230183A CN104820175A CN 104820175 A CN104820175 A CN 104820175A CN 201510230183 A CN201510230183 A CN 201510230183A CN 104820175 A CN104820175 A CN 104820175A
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Abstract
Provided are a device and an experimental method for researching the insulating property of micro water containing SF6 gas. The device is mainly composed of a stainless steel tank, a micro sampling mechanism, ball valves, a micro water on-line monitoring system, and a constant-temperature heating unit. According to the method, the temperature and humidity of SF6 gas in the tank are adjusted by the device, so that the insulating property of micro water containing SF6 gas at different temperatures can be researched. The temperature and humidity of SF6 gas can be controlled accurately, and the reliability and accuracy are high. The device is simple in structure and convenient to operate, and can be widely promoted.
Description
Technical field
The invention belongs to gas insulated switchgear (GIS) insulation defect protection field, be specifically related to SF under different temperatures
6the device of insulation characterisitic research when gas contains micro-water and experimental technique.
Background technology
Due to SF
6gas has higher dielectric strength, excellent arc extinction performance, good insulation characterisitic, and nontoxic, stable chemical performance, along with the fast development of power industry, with SF
6gas is that the GIS device of insulating medium has had application widely.Under normal circumstances, can contain a certain amount of water vapor in GIS, its main source is: (1) SF
6water vapor contained in new gas; (2) moisture in surrounding environment or gas filling valve, gas-filled tube is introduced when Disintegration overhaul or inflation, tonifying Qi; (3) equipment poor sealing, SF
6gas is to external leakage, and because outside moisture pressure is higher than the water partial pressure of gas in air chamber, outside water vapor oppositely can infiltrate in air chamber, causes SF
6gas water cut while density declines rises.Therefore, SF is studied
6gas is containing the insulating property under micro-regimen condition, significant for guarantee GIS safety, stable operation.Meanwhile, consider temperature and gas humidity closely related, containing micro-water SF under research different temperatures
6gas-insulated characteristic is very necessary.
Existing research is containing micro-water SF
6the method of gas-insulated characteristic, usually adopts and rule of thumb smears the mode of moisture film to simulate different humidity SF at tank surface
6gas, the shortcoming of the method is: the amount of water vapor is wayward, usually needs repeated multiple times trial, micro-water yield in tank body just can be made to reach desirable value, inefficiency, poor accuracy.
Summary of the invention
Given this, the invention discloses a kind of research containing micro-water SF
6the device of gas-insulated characteristic;
Described device comprises sample introduction mechanism, tank body, tracheae, high-voltage conductive rod, rain glass, inflation/deflation tracheae, the first ball valve, extremely returns mechanism, the second ball valve, metal electrode, low voltage conductive bar, SF6 micro-water on-line monitoring unit and heated at constant temperature unit; Described heated at constant temperature unit can carry out heated at constant temperature at different temperatures;
Described sample introduction mechanism passes through to go back to mechanism and inserts in the tracheae be connected with tank body, is provided with the first ball valve between described tracheae and tank body; Described high-voltage conductive rod one end is connected with the top of tank body, and the other end is connected with the high-field electrode of metal electrode; The low-field electrode of metal electrode is connected with one end of low voltage conductive bar; The other end of low voltage conductive bar is connected with tank base; SF6 micro-water on-line monitoring unit is through gas in tank base monitoring tank; Heated at constant temperature unit to be positioned on the downside of tank body and to be close to tank body base plate; One end of described inflation/deflation tracheae is placed in tank body, and and the second ball valve is installed between tank body, between the second ball valve and tank body, rain glass is installed.
A kind of research is containing micro-water SF
6the experimental technique of gas-insulated characteristic, said method comprising the steps of:
S100, tank body to be evacuated; Close the first ball valve, open the second ball valve, use vacuum pump to be vacuumized tank body by inflation/deflation tracheae, after 8min-12min, stop vacuum pump, close the second ball valve;
S200, clamp micro-water to tank body; Open the first ball valve, by fine setting sample introduction mechanism by the liquid water droplets of aequum instillation tank body, after leaving standstill 50min-70min, close the first ball valve;
S300, in tank body, be filled with SF
6gas, carries out insulation experiment; Open the second ball valve, in tank body, be filled with SF by inflation/deflation tracheae
6gas, till gas atmosphere reaches required air pressure, closes the second ball valve, after leaving standstill 50min-70min, uses heated at constant temperature unit to heat certain hour to tank body, until SF
6micro-water on-line detecting system records gas in tank and has reached temperature required, holding device constant temperature, to high-voltage conductive rod pressurization, carries out insulation characterisitic experiment.
Accompanying drawing explanation
Fig. 1 is the Experimental equipment of an embodiment; In figure: 1 micro-sampling mechanism, 2 stainless steel tank bodies, 3 high-voltage conductive rods, 4 organic glass observation windows, 5 rain glasss, 6 inflation/deflation tracheaes, 7 second ball valves, 8 to going back to mechanism, 9 first ball valves, 10 metal electrodes, 11 low voltage conductive bars, 12SF6 micro-water on-line monitoring unit, 13 heated at constant temperature unit, 14 tracheaes;
Fig. 2 is the enlarged drawing at this embodiment device A place, and 8 to going back to mechanism, 9 ball valves.
Embodiment
The object of the invention is for existing research containing micro-water SF
6the deficiency of gas-insulated characteristic research device and experimental technique, provides one can accurate control SF
6gas temperature and humidity thus research different humidity SF
6gas is the device of insulation characterisitic and experimental technique at different temperatures, has easy and simple to handle, degree of accuracy high.
Below in conjunction with embodiment, further illustrate the present invention.
In one embodiment, a kind of research is disclosed containing micro-water SF
6the device of gas-insulated characteristic, described device comprises sample introduction mechanism, tank body, tracheae, high-voltage conductive rod, rain glass, inflation/deflation tracheae, the first ball valve, extremely returns mechanism, the second ball valve, metal electrode, low voltage conductive bar, SF6 micro-water on-line monitoring unit and heated at constant temperature unit; Described heated at constant temperature unit can carry out heated at constant temperature at different temperatures;
Described sample introduction mechanism passes through to go back to mechanism and inserts in the tracheae be connected with tank body, is separated with the first ball valve between described tracheae and tank body; High-voltage conductive rod one end is connected with the top of tank body, and the other end is connected with the negative electrode of metal electrode; The anode of metal electrode is connected with one end of low voltage conductive bar; The other end of low voltage conductive bar is connected with SF6 micro-water on-line monitoring unit; On-line monitoring system is connected and is positioned over the top of heated at constant temperature unit; One end of described inflation/deflation tracheae is placed in tank body, and and between tank body between be separated with the second ball valve, between the second ball valve and tank body, rain glass is installed.
The present embodiment is to describe a kind of research containing micro-water SF
6the composition of the device of gas-insulated characteristic, the described effect to going back to mechanism is in the present embodiment to prevent the outside air when opening the first ball valve and carrying out annotating the operation of micro-water from entering described device; Described tank body is that stainless steel material is made.Described device can by SF in SF6 micro-water on-line monitoring unit and heated at constant temperature unit manual control tank body
6the temperature and humidity of gas, solve the uppity problem of micro-water yield, efficiency is high, and precision is high.
In one embodiment, described device also includes organic glass observation window, and described organic glass observation window is positioned at the left surface of tank body, and is spaced a distance with the top of SF6 micro-water on-line monitoring unit.
In the present embodiment, described organic glass observation window observes situation in tank for observing view window, especially can observe discharge channel when gas gap punctures in tank.
In one embodiment, described sample introduction mechanism includes sample introduction needle and fine setting container; The long 30mm-80mm of described sample introduction needle, internal diameter 0.2mm-0.5mm; The capacity of described fine setting container is the one of 25 μ L, 50 μ L, 250 μ L and 100 μ L.
In the present embodiment, for different requirement of experiment, the length of described sample introduction needle and internal diameter also can select other specifications, and the capacity of sample introduction fine setting container is also that experimental requirement is selected;
In one embodiment, described SF6 micro-water on-line monitoring unit is used for on-line monitoring SF
6the humidity and temperature of gas, its measurement range is 10 ~ 20000ppm, and working pressure range is 0.05 ~ 1.0MPa, and measuring error is no more than 3% of total range.
The effect of the present embodiment is concrete being described SF6 micro-water on-line monitoring unit, and SF6 micro-water on-line monitoring unit is commercial on-line monitoring system, and its temperature range that can bear is 0-400 DEG C, and power is 800W.Described SF6 micro-water on-line monitoring unit by data transfer to computing machine, can facilitate reading and the storage of data.
In one embodiment, described heated at constant temperature unit comprises heating platform, and described heating platform adopts aluminium to make, and heating platform is of a size of 200mm*200mm*20mm; Described heated at constant temperature unit is used for the heated at constant temperature to tank body, and power is 800W, and heating temperature range comprises 0 ~ 400 DEG C.
Heated at constant temperature unit in the present embodiment is used for heating to tank body the temperature constant ensureing described device, and it changes heating-up temperature by temperature setting button.
In one embodiment, disclose device as shown in Figure 1, mainly comprise micro-sampling mechanism 1, stainless steel tank body 2, high-voltage conductive rod 3, organic glass observation window 4, rain glass 5, inflation/deflation tracheae 6, ball valve 7, extremely return mechanism 8, ball valve 9, metal electrode 10, low voltage conductive bar 11, SF6 micro-water on-line monitoring unit 12, constant temperature heating device 13; Micro-sampling mechanism 1 passes through to go back to mechanism 8 and inserts in the tracheae 14 be connected with tank body, and there is ball valve 9 at tracheae and experiment tank body interval.
In order to state the details of described device more clearly, as described in Figure 2, it is the enlarged drawing at A place in Fig. 1, is specially sample introduction mechanism 1, position relationship between Zhi Hui mechanism 8 and ball valve 9.
In one embodiment, the invention discloses a kind of research containing micro-water SF
6the experimental technique of gas-insulated characteristic, said method comprising the steps of:
S100, tank body to be evacuated; Close the first ball valve, open the second ball valve, use vacuum pump to be vacuumized tank body by inflation/deflation tracheae, after 8min-12min, stop vacuum pump, close the second ball valve;
S200, clamp micro-water to tank body; Open the first ball valve, by fine setting sample introduction mechanism by the liquid water droplets of aequum instillation tank body, after leaving standstill 50min-70min, close the first ball valve;
S300, in tank body, be filled with SF
6gas, carries out insulation experiment; Open the second ball valve, in tank body, be filled with SF by inflation/deflation tracheae
6gas, till gas atmosphere reaches required air pressure, closes the second ball valve, after leaving standstill 50min-70min, uses heated at constant temperature unit to heat certain hour to tank body, until SF
6micro-water on-line detecting system records gas in tank and has reached temperature required, holding device constant temperature, to high-voltage conductive rod pressurization, carries out insulation characterisitic experiment.
Present embodiments provide a kind of research containing micro-water SF
6the method of the insulation characterisitic of gas, in step s 200 because the boiling point of water under vacuum state is lower, experience shows at room temperature to leave standstill a period of time, and aqueous water almost volatilizees completely; After adding liquid water droplets, leave standstill 50min-70min in the method, now think that aqueous water all volatilizees, close the second ball valve subsequently; SF is poured in step S300 raising middle flask tank body
6gas till gas atmosphere reaches required air pressure after, in order to make gas uniform, needing described device to leave standstill 50min-70min, and after experiment terminates, experiment gas being reclaimed.
In one embodiment, the insulation characterisitic experiment in described step S300 is specially and adopts the rate of rise to be that the even boosting mode of 5kV/s applies voltage, until the gap breakdown between metal electrode to high-voltage conductive rod.
In one embodiment, successively increase the content of micro-water in step s 200, for testing SF at identical temperature
6the insulating property of gas under different humidity; The content successively increasing micro-water is 10 μ L ~ 15 μ L; Keep temperature-resistant under each humidity, to measure multiple data average again, and interval 2.5min-5min between each insulation characterisitic experiment.
The present embodiment is in order to explain that research is containing micro-water SF at the same temperature further
6gas-insulated Characterization method, is specially, and studies the SF under different humidity at one temperature
6gas-insulated characteristic, in order to the accuracy of testing under ensureing each humidity, measures multiple experimental data under each humidity, general selection measurement 5 secondary data, in order to every minor insulation experiment does not affect experiment next time, between twice insulation characterisitic experiment at regular intervals, 3min can be selected.
In one embodiment, in described step S300, change the heating-up temperature of heated at constant temperature unit, under testing different temperatures, contain micro-water SF
6the insulation characterisitic of gas, and the insulation characterisitic experiment carrying out different humidity at each temperature.
In one embodiment, open a kind of research is containing micro-water SF
6the experimental technique of gas-insulated characteristic.Utilize the device of above-described embodiment, research different humidity SF
6gas insulation characterisitic at different temperatures.The concrete steps of described method are as follows:
(1) be evacuated in tank body
Close micro-sampling mechanism place's ball valve 9, open inflation/deflation tracheae place ball valve 7, use vacuum pump to be vacuumized by inflation/deflation tracheae 6 pairs of tank bodies, vacuum pump of stopping transport after certain hour, close ball valve 7;
(2) to annotate micro-water
By the required SF reached
6gas humidity calculates the Liquid water content needing to add in tank body.Open micro-sampling mechanism 1 place's ball valve 9, fine setting micro-sampling mechanism 1 is by the aqueous water of aequum instillation tank body.Because under vacuum state, the boiling point of water is lower, experience shows at room temperature to leave standstill a period of time, and aqueous water almost volatilizees completely.Usually leave standstill 1h in an experiment, now think that aqueous water all volatilizees, close ball valve 9 subsequently;
(3) SF is filled with
6gas, adjustments of gas temperature, carries out insulation experiment
Open inflation/deflation tracheae place ball valve 7, in tank body, be filled with SF by inflation/deflation tracheae 6
6gas, till gas atmosphere reaches required air pressure, closes ball valve 7.Leave standstill 1h until gas and vapor permeation is even.Use constant temperature heating device 13 pairs of tank body heating certain hours, until SF
6micro-water on-line detecting system 12 records gas in tank and has reached temperature required.Holding device constant temperature, pressurizes to high-voltage conductive rod 3, carries out relevant insulation characterisitic experiment.Test the SF terminated in rear recovery tank body
6gas, then repeats step (1) ~ (3), and in (2) step, successively increase progressively the content of micro-water of annotating, and can obtain SF
6the insulating property of gas under different humidity.Meanwhile, in (3) step, change the heating-up temperature of constant temperature heating device 13, under different temperatures can be recorded, contain micro-water SF
6the insulation characterisitic of gas.
The invention has the beneficial effects as follows:
(1) can accurate control SF
6micro-water content in gas, so that research different humidity SF
6the insulating property of gas;
(2) can control SF
6gas temperature, thus SF under research different temperatures
6gas containing micro-water characteristic;
(3) installation cost is low, and experimental implementation is simple, is convenient to promote.
Claims (10)
1. a research is containing micro-water SF
6the device of gas-insulated characteristic, is characterized in that:
Described device comprises sample introduction mechanism, tank body, the first tracheae, high-voltage conductive rod, rain glass, inflation/deflation tracheae, the first ball valve, extremely returns mechanism, the second ball valve, metal electrode, low voltage conductive bar, SF
6micro-water on-line monitoring unit and heated at constant temperature unit, described heated at constant temperature unit can carry out heated at constant temperature at different temperatures;
Described sample introduction mechanism passes through to go back to mechanism and inserts in the first tracheae be connected with tank body, is provided with the first ball valve between described first tracheae and tank body; Described high-voltage conductive rod one end is connected with the top of tank body, and the other end is connected with the high-field electrode of metal electrode; The low-field electrode of metal electrode is connected with one end of low voltage conductive bar; The other end of low voltage conductive bar is connected with tank base; SF
6micro-water on-line monitoring unit is through gas in tank base monitoring tank; Heated at constant temperature unit to be positioned on the downside of tank body and to be close to tank body base plate; One end of described inflation/deflation tracheae is placed in tank body, and and the second ball valve is installed between tank body, between the second ball valve and tank body, rain glass is installed.
2. device according to claim 1, is characterized in that: preferred, described device also includes organic glass observation window, and described organic glass observation window is positioned at the side of tank body, for observing the situation in tank body.
3. device according to claim 1, is characterized in that: described sample introduction mechanism comprises sample introduction needle and fine setting container; The long 30mm-80mm of described sample introduction needle, internal diameter 0.2mm-0.5mm; The capacity of described fine setting container is the one in 25 μ L, 50 μ L, 100 μ L, 250 μ L.
4. device according to claim 1, is characterized in that: described SF
6micro-water on-line monitoring unit is used for on-line monitoring SF
6the humidity of gas, its measurement range is 10 ~ 20000ppm, and working pressure range is 0.05 ~ 1.0MPa.
5. device according to claim 4, is characterized in that: described SF
6micro-water on-line monitoring unit is also for monitoring SF
6the temperature of gas.
6. device according to claim 1, is characterized in that: described heated at constant temperature unit comprises heating platform, and described heating platform adopts aluminium to make, and heating platform is of a size of 200mm*200mm*20mm; Described heated at constant temperature unit is used for the heated at constant temperature to tank body, and heating temperature range comprises 0 ~ 400 DEG C.
7. one kind utilizes the arbitrary device of claim 1 to 6 to study containing micro-water SF
6the experimental technique of gas-insulated characteristic, is characterized in that, said method comprising the steps of:
S100, tank body to be evacuated: close the first ball valve, open the second ball valve, to use vacuum pump to be vacuumized tank body by inflation/deflation tracheae, after 8min-12min, stop vacuumizing, close the second ball valve;
S200, micro-water of annotating to tank body: open the first ball valve, instill in tank body by fine setting sample introduction mechanism by liquid water droplets, after leaving standstill 50min-70min, close the first ball valve;
S300, in tank body, be filled with SF
6gas, carries out insulation experiment: open the second ball valve, be filled with SF by inflation/deflation tracheae in tank body
6gas, till gas atmosphere reaches required air pressure, closes the second ball valve, after leaving standstill 50min-70min, uses heated at constant temperature unit to heat certain hour to tank body, until SF
6micro-water on-line monitoring unit records gas in tank and has reached temperature required, holding device constant temperature, to high-voltage conductive rod pressurization, carries out insulation characterisitic experiment.
8. method according to claim 7, is characterized in that, the insulation characterisitic experiment in described step S300 is specially: adopt the rate of rise to be that the even boosting mode of 5kV/s applies voltage, until the gap breakdown between metal electrode to high-voltage conductive rod.
9. method according to claim 8, is characterized in that: the content successively increasing micro-water in step s 200, for testing SF at identical temperature
6the insulating property of gas under different humidity; The content successively increasing micro-water is 10 μ L ~ 15 μ L; Keep temperature-resistant under each humidity, to measure multiple data average again, and interval 2min-5min between each insulation characterisitic experiment.
10. method according to claim 9, is characterized in that: the heating-up temperature changing heated at constant temperature unit in described step S300, under testing different temperatures, contain micro-water SF
6the insulation characterisitic of gas, and the insulation characterisitic experiment carrying out different humidity at each temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510230183.0A CN104820175B (en) | 2015-05-07 | 2015-05-07 | One kind research contains micro- water SF6The device and experimental method of gas-insulated characteristic |
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| CN201510230183.0A CN104820175B (en) | 2015-05-07 | 2015-05-07 | One kind research contains micro- water SF6The device and experimental method of gas-insulated characteristic |
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| CN108254667A (en) * | 2016-12-27 | 2018-07-06 | 三菱电机株式会社 | Evaluating apparatus and evaluation method |
| CN109782144A (en) * | 2019-03-29 | 2019-05-21 | 云南电网有限责任公司电力科学研究院 | A kind of three spectrum experiment platform of shelf depreciation based on photomultiplier tube |
| CN112557247A (en) * | 2020-12-01 | 2021-03-26 | 国网福建省电力有限公司建设分公司 | GIS (gas insulated switchgear) intracavity humidity detection method considering installation environment factors |
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| CN113933467A (en) * | 2021-10-26 | 2022-01-14 | 国网浙江省电力有限公司电力科学研究院 | Sulfur hexafluoride decomposition product gas pressure monitoring device based on gas in-situ detection |
| CN114646756A (en) * | 2022-03-10 | 2022-06-21 | 湖北工业大学 | Detection device and detection method for compatibility of environment-friendly gas and rubber material |
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