CN109027664B - Online air supplementing method for SF6 electrical equipment - Google Patents
Online air supplementing method for SF6 electrical equipment Download PDFInfo
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- CN109027664B CN109027664B CN201810770641.3A CN201810770641A CN109027664B CN 109027664 B CN109027664 B CN 109027664B CN 201810770641 A CN201810770641 A CN 201810770641A CN 109027664 B CN109027664 B CN 109027664B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
- F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0104—Shape cylindrical
- F17C2201/0119—Shape cylindrical with flat end-piece
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/03—Orientation
- F17C2201/035—Orientation with substantially horizontal main axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/05—Size
- F17C2201/056—Small (<1 m3)
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0107—Single phase
- F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
- F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
- F17C2225/0107—Single phase
- F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/01—Propulsion of the fluid
- F17C2227/0128—Propulsion of the fluid with pumps or compressors
- F17C2227/0135—Pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/043—Pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/07—Actions triggered by measured parameters
- F17C2250/072—Action when predefined value is reached
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2270/00—Applications
- F17C2270/05—Applications for industrial use
Abstract
The invention provides an online gas supplementing method for SF6 electrical equipment, which comprises the following steps: s1, installing a gas supplementing tank, connecting the gas supplementing tank with SF6 electrical equipment through a connecting hose, arranging an electromagnetic valve between the connecting hose and the SF6 electrical equipment, arranging a suction pump between the connecting hose and the gas supplementing tank, and connecting a vacuum pump between the electromagnetic valve and the suction pump on the connecting hose; s2, detecting the pressure inside the SF6 electrical equipment in real time, and judging whether the SF6 electrical equipment leaks air or not according to the pressure; s3, when the SF6 electrical equipment leaks air, starting a vacuum pump to vacuumize the connecting hose; and S4, closing the vacuum pump, and then opening the electromagnetic valve, the suction pump and the air supplement tank to supplement air for the SF6 electrical equipment. According to the invention, the intelligent and automatic air supply of the SF6 electrical equipment is realized, the time delay of manual air supply is solved, and the manpower requirement is favorably reduced; secondly, online air supplement can be carried out on SF6 electrical equipment, and the electrical safety problem of SF6 electrical equipment which cannot stop working in time is solved.
Description
Technical Field
The invention relates to the technical field of SF6 electrical equipment, in particular to an online gas supplementing method for SF6 electrical equipment.
Background
For SF6 electrical equipment, the density value of SF6 gas is related to the insulation or arc extinguishing performance of SF6 electrical equipment. Therefore, the horizontal treatment of the density value of the SF6 gas has important significance on the insulation or arc extinguishing performance of SF6 electrical equipment. At present, a lot of transformer substations are unattended, once SF6 electrical equipment leaks air, the transformer substations must be manually maintained, the labor requirement is high, the cost is high, and the timeliness of maintenance is difficult to guarantee; secondly, many subordinate power supply nodes of a plurality of transformer substations are too many to be powered off at any time, and at the moment, SF6 electrical equipment must continue to work even if air leaks, so that the electrical safety is difficult to guarantee.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides an online gas supplementing method for SF6 electrical equipment.
The invention provides an online gas supplementing method for SF6 electrical equipment, which comprises the following steps:
s1, installing a gas supplementing tank, connecting the gas supplementing tank with SF6 electrical equipment through a connecting hose, arranging an electromagnetic valve between the connecting hose and the SF6 electrical equipment, arranging a suction pump between the connecting hose and the gas supplementing tank, and connecting a vacuum pump between the electromagnetic valve and the suction pump on the connecting hose;
s2, detecting the pressure inside the SF6 electrical equipment in real time, and judging whether the SF6 electrical equipment leaks air or not according to the pressure;
s3, when the SF6 electrical equipment leaks air, starting a vacuum pump to vacuumize the connecting hose;
and S4, closing the vacuum pump, and then opening the electromagnetic valve, the suction pump and the air supplement tank to supplement air for the SF6 electrical equipment.
Preferably, in step S2, it is determined whether the SF6 electrical equipment is air-leaking according to the comparison result between the pressure detection value inside the SF6 electrical equipment and the preset pressure threshold value.
Preferably, step S2 specifically includes the following steps:
s21, detecting the pressure inside the SF6 electrical equipment in real time, and comparing the pressure detection value with a preset pressure threshold value;
s22, when the pressure detection value is smaller than the pressure threshold value, judging whether the pressure inside the SF6 electrical equipment presents a descending trend; if yes, judging that the SF6 electrical equipment leaks air; otherwise, the process returns to step S21.
Preferably, in step S21, the pressure inside the SF6 electrical equipment is detected in real time, and the latest N pressure detection values are recorded; in step S22, it is determined whether the pressure inside the SF6 electrical device exhibits a decreasing trend according to whether the latest N pressure detection values are decreased.
Preferably, N ≧ 3.
Preferably, step S4 specifically includes the following steps:
s41, calculating the leakage flow rate of the SF6 electrical equipment according to the latest N pressure detection values and the gas volume in the SF6 electrical equipment;
and S42, adjusting the working state of the suction pump, and supplying air to SF6 electrical equipment at the same flow rate of the air leakage flow rate.
Preferably, in step S42, the leakage air flow rate is updated in real time according to the latest N pressure detection values.
Preferably, in step S3, the vacuum pump is turned on to evacuate the hose according to the preset vacuum time value.
Preferably, the preset vacuum time value is 3s to 10 s.
According to the SF6 electrical equipment online air supplement method, the gas pressure in the SF6 electrical equipment is monitored online in real time, when air leakage of the SF6 electrical equipment is found, the suction pump and the air supplement tank are remotely controlled online to supplement air to the SF6 electrical equipment, so that the intelligent and automatic air supplement of the SF6 electrical equipment is realized, the time delay of manual air supplement is solved, and the manpower requirement is favorably reduced; secondly, online air supplement can be carried out on SF6 electrical equipment, and the electrical safety problem of SF6 electrical equipment which cannot stop working in time is solved.
In the invention, before air supplement, the vacuum pump is started to vacuumize the connecting hose, so that air in the connecting hose can be prevented from entering SF6 electrical equipment, and the purity of insulating gas in SF6 electrical equipment is ensured.
Drawings
Fig. 1 is a flowchart of an online gas supplementing method for SF6 electrical equipment in embodiment 1;
FIG. 2 is a schematic view of an online gas supplementing device of the SF6 electrical equipment used in FIG. 1;
fig. 3 is a flowchart of an online gas supplementing method for SF6 electrical equipment in embodiment 2;
fig. 4 is a flowchart of an online gas supplementing method for SF6 electrical equipment in embodiment 3.
Detailed Description
Example 1
Referring to fig. 1, the online gas supplementing method for SF6 electrical equipment provided by the invention comprises the following steps:
s1, installing the air supply tank 1, connecting the air supply tank 1 with SF6 electrical equipment through a connecting hose 2, arranging an electromagnetic valve 3 between the connecting hose 2 and the SF6 electrical equipment, arranging a suction pump 4 between the connecting hose 2 and the air supply tank 1, and further connecting a vacuum pump 5 between the electromagnetic valve 3 and the suction pump 4 on the connecting hose 2. In this way, in the present embodiment, the SF6 electrical equipment can be automatically replenished with air by the suction pump 4 and the air replenishing tank 1.
And S2, detecting the pressure inside the SF6 electrical equipment in real time, and judging whether the SF6 electrical equipment leaks air or not according to the pressure. Specifically, in this step, the pressure detection value may be compared with a preset pressure threshold value, so as to determine that the SF6 electrical equipment is sufficiently air-leaking according to the comparison result. And when the pressure detection value is smaller than the pressure threshold value, the SF6 electrical equipment is judged to be air leakage.
And S3, when the SF6 electrical equipment leaks air, starting the vacuum pump 5 to vacuumize the connecting hose 2.
And S4, closing the vacuum pump 5, and then opening the electromagnetic valve 3, the suction pump 4 and the air supplementing tank 1 to supplement air to the SF6 electrical equipment.
In this embodiment, before air supply, the vacuum pump is first turned on to evacuate the connection hose 2, so that air in the connection hose can be prevented from entering the SF6 electrical equipment, and thus the purity of the insulating gas in the SF6 electrical equipment can be ensured.
In the embodiment, the gas pressure in the SF6 electrical equipment is monitored online in real time, and when the SF6 electrical equipment leaks gas, the suction pump and the gas supplementing tank are remotely controlled online to supplement gas to the SF6 electrical equipment, so that the intelligent and automatic gas supplementing of the SF6 electrical equipment is realized, the time delay of manual gas supplementing is solved, and the manpower requirement is favorably reduced; secondly, online air supplement can be carried out on SF6 electrical equipment, and the electrical safety problem of SF6 electrical equipment which cannot stop working in time is solved.
In step S3 of this embodiment, the vacuum pump 5 is turned on to evacuate the hose according to the preset vacuum time value, which is 3S to 10S. Thus, the sequential control of the qi replenishing process is facilitated.
Example 2
In this embodiment, step S2 in embodiment 1 is divided into the following steps.
And S21, detecting the pressure inside the SF6 electrical equipment in real time, and comparing the pressure detection value with a preset pressure threshold value.
And S22, when the pressure detection value is smaller than the pressure threshold value, judging whether the pressure inside the SF6 electrical equipment presents a descending trend. If yes, the SF6 electrical equipment is judged to be air leakage. Otherwise, the process returns to step S21. Specifically, in this step, whether the pressure inside the SF6 electrical equipment is decreased is determined according to the variation trend of the pressure detection value in the SF6 electrical equipment.
Therefore, in the embodiment, whether the SF6 electrical equipment leaks air or not is judged by combining the comparison result of the current pressure detection value and the pressure threshold and the pressure variation trend of the SF6 electrical equipment, so that the air leakage judgment error caused by the environmental factors of the air volume change due to non-air leakage such as temperature change and the like is favorably avoided, and the air leakage judgment accuracy is favorably improved.
Specifically, in step S21 of this embodiment, the pressure inside the SF6 electrical device is detected in real time, and the latest N pressure detection values are recorded. In step S22, it is determined whether the pressure inside the SF6 electrical device exhibits a decreasing trend according to whether the latest N pressure detection values are decreased. N ≧ 3.
Example 3
In the embodiment, the technical length of the embodiment 2 is long, and the step S4 specifically includes the following steps:
and S41, calculating the leakage gas flow rate of the SF6 electrical equipment according to the latest N pressure detection values and the gas volume in the SF6 electrical equipment. Specifically, in this step, the latest N pressure detection values are updated in real time, and the leakage flow rate is updated along with the updating of the N pressure detection values.
And S42, adjusting the working state of the suction pump 4, and supplying air to SF6 electrical equipment at the same air leakage flow rate.
Therefore, in the embodiment, the air is supplemented according to the leakage flow rate, so that the pressure of the insulating gas in the SF6 electrical equipment can be ensured to be maintained at a safe and stable degree; secondly, the increase of the leakage flow rate caused by the increase of the internal pressure of the SF6 electrical equipment can be avoided, and the transitional waste of the insulating gas is avoided.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (5)
1. An online air supplementing method for SF6 electrical equipment is characterized by comprising the following steps:
s1, installing a gas supplementing tank (1), connecting the gas supplementing tank (1) with SF6 electrical equipment through a connecting hose (2), arranging an electromagnetic valve (3) between the connecting hose (2) and the SF6 electrical equipment, arranging a suction pump (4) between the connecting hose (2) and the gas supplementing tank (1), and connecting a vacuum pump (5) between the electromagnetic valve (3) and the suction pump (4) on the connecting hose (2);
s2, detecting the pressure inside the SF6 electrical equipment in real time, and judging whether the SF6 electrical equipment leaks air or not according to the pressure;
s3, when the SF6 electrical equipment leaks air, starting a vacuum pump (5) to vacuumize the connecting hose (2);
s4, closing the vacuum pump (5), and then opening the electromagnetic valve (3), the suction pump (4) and the air supplement tank (1) to supplement air to the SF6 electrical equipment;
in step S2, whether the SF6 electrical device leaks air is determined according to a comparison result between the pressure detection value inside the SF6 electrical device and a preset pressure threshold;
step S2 specifically includes the following steps:
s21, detecting the pressure inside the SF6 electrical equipment in real time, and comparing the pressure detection value with a preset pressure threshold value;
s22, when the pressure detection value is smaller than the pressure threshold value, judging whether the pressure inside the SF6 electrical equipment presents a descending trend; if yes, judging that the SF6 electrical equipment leaks air; otherwise, returning to step S21;
in step S21, detecting the pressure inside the SF6 electrical device in real time, and recording the latest N pressure detection values; in step S22, whether the pressure inside the SF6 electrical device is in a decreasing trend is determined according to whether the latest N pressure detection values are decreased;
step S4 specifically includes the following steps:
s41, calculating the leakage flow rate of the SF6 electrical equipment according to the latest N pressure detection values and the gas volume in the SF6 electrical equipment;
and S42, adjusting the working state of the suction pump (4) and supplying air to SF6 electrical equipment at the same air leakage flow rate.
2. The SF6 electrical equipment online gas supplementing method of claim 1, wherein N ≧ 3.
3. The online gas supplementing method for the SF6 electrical equipment of claim 1, wherein in step S42, the leakage gas flow rate is updated in real time based on the most recent N pressure detection values.
4. The SF6 electrical equipment online air supplement method of claim 1, wherein in step S3, the vacuum pump (5) is turned on to evacuate the hose according to a preset vacuum time value.
5. The online gas supplementing method for the SF6 electric equipment of claim 4, wherein the preset vacuum time value is 3s to 10 s.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810770641.3A CN109027664B (en) | 2018-07-13 | 2018-07-13 | Online air supplementing method for SF6 electrical equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810770641.3A CN109027664B (en) | 2018-07-13 | 2018-07-13 | Online air supplementing method for SF6 electrical equipment |
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| CN109027664A CN109027664A (en) | 2018-12-18 |
| CN109027664B true CN109027664B (en) | 2020-09-04 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110160710A (en) * | 2019-05-09 | 2019-08-23 | 国网山东省电力公司枣庄供电公司 | A kind of combined electrical apparatus air leakage point quickly searches device |
| CN112283574B (en) * | 2019-07-22 | 2022-06-03 | 中国石油天然气股份有限公司 | Inflating device of isolating bag, inflating bottle and inflating method |
| CN111359367A (en) * | 2020-03-16 | 2020-07-03 | 中北大学 | SF (sulfur hexafluoride)6Gas micro-water treatment device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2916605Y (en) * | 2006-05-16 | 2007-06-27 | 源星生医科技股份有限公司 | Gas pressure leakage detector |
| CN203908741U (en) * | 2013-12-31 | 2014-10-29 | 浙江幸福机电科技有限公司 | Leakage detection device |
| CN105299444A (en) * | 2015-09-16 | 2016-02-03 | 四川菲博斯科技有限责任公司 | Intelligent SF6 (sulfur hexafluoride) gas inflation module for electrical equipment |
| CN106052972A (en) * | 2016-07-19 | 2016-10-26 | 宁波慈兴精密传动科技有限公司 | Bearing air leakage detection tool and bearing air leakage detection device comprising same |
| CN207230153U (en) * | 2017-06-14 | 2018-04-13 | 王军 | A kind of full-automatic SF6 electrical equipment aerating devices |
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Address after: No. 397, Tongcheng South Road, Baohe District, Hefei City, Anhui Province 230061 Patentee after: Super high voltage branch of State Grid Anhui Electric Power Co.,Ltd. Patentee after: STATE GRID CORPORATION OF CHINA Patentee after: SHANGHAI ROYE ELECTRIC Co.,Ltd. Address before: 230000, No. 415, Wuhu Road, Hefei, Anhui Patentee before: STATE GRID ANHUI POWER SUPPLY COMPANY OVERHAUL BRANCH Patentee before: State Grid Corporation of China Patentee before: SHANGHAI ROYE ELECTRIC Co.,Ltd. |
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