CN111760425A - GIS equipment SF6On-line processing device and method without power cut when humidity exceeds standard - Google Patents
GIS equipment SF6On-line processing device and method without power cut when humidity exceeds standard Download PDFInfo
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- CN111760425A CN111760425A CN202010662417.XA CN202010662417A CN111760425A CN 111760425 A CN111760425 A CN 111760425A CN 202010662417 A CN202010662417 A CN 202010662417A CN 111760425 A CN111760425 A CN 111760425A
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- buffer tank
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
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Abstract
According to the GIS equipment used in practice, the normal working pressure of the GIS equipment is taken as the reference, and the SF with the humidity exceeding the standard is firstly subjected to pressure fluctuation within the allowable pressure fluctuation range of the GIS equipment6Gas is led out to a primary buffer tank, then is dried by a gas drying device and pressurized by a compressor, and is sent to a secondary buffer tank, and finally is led into the GIS equipment again, and SF with the humidity exceeding the standard in the GIS equipment is realized through a plurality of circulation processes6The on-line processing. The invention is in SF6The pressure fluctuation in the GIS equipment is strictly controlled in the circulating process of continuously leading out, drying and leading in the gas so as to ensure the SF in the GIS equipment under the condition of no power failure6The humidity exceeds the standard, the method is simple and reliable, and the safe and stable operation of the GIS equipment is not influenced.
Description
Technical Field
The invention relates to the field of GIS equipment maintenance, in particular to a GIS equipment SF6An on-line processing device and method without power cut when humidity exceeds standard.
Background
GIS equipment is widely applied to power systems because of the advantages of small occupied area, long overhaul period, no pollution, no influence of environmental factors such as rain, salt fog and the like. Insulating gas sulfur hexafluoride (SF) used in GIS equipment6) Has excellent insulating property, arc extinguishing property and heat conducting property. However, when SF6When the humidity exceeds a certain value (the standard value is that the arc extinguishing air chamber is not more than 300 muL/L, and the rest air chambers are not more than 500 muL/L), the GIS equipment can have electrical performance degradation under a certain condition, and even cause serious equipment failure. In the presence of excess water, SF6The insulating property of the gas is lowered, and SF6Various arc-decomposed products of gas andSF6the gas will undergo hydrolysis reaction to form acidic substances (such as HF or H)2SO4) that will corrode metal parts and insulation within the GIS.
Aiming at the condition that the moisture of the GIS equipment exceeds the standard, the current common treatment method is to combine power failure maintenance, vacuumize the gas in the equipment and inject dry gas again. However, the power failure maintenance procedure is complex, the operation is complex, the cost is high, and the stable operation of the power grid is influenced.
Disclosure of Invention
Aiming at overcoming the defects of the prior art, the invention aims to provide a GIS (geographic information System) device SF6The device and the method for online processing the humidity exceeding the standard without power failure are used for processing SF (sulfur hexafluoride) with the humidity exceeding the standard in the GIS within the allowable pressure fluctuation range of the GIS6Multiple cycles of on-line exporting, drying and importing are carried out, and GIS equipment SF under the condition of no power failure is realized6The humidity exceeds the standard, the method is simple and reliable, and the safe and stable operation of the GIS equipment is not influenced.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
GIS equipment SF6On-line processing apparatus that humidity exceeds standard and does not have a power failure, including GIS equipment, elementary buffer tank, gas drying equipment, compressor and the secondary buffer tank that connects gradually, be equipped with the 1# check valve on the connecting tube between GIS equipment and the elementary buffer tank air inlet, be equipped with the 2# check valve on the connecting tube between elementary buffer tank gas outlet and the gas drying equipment air inlet, be equipped with the 3# check valve on the connecting tube between compressor gas outlet and the secondary buffer tank air inlet, secondary buffer tank gas outlet is connected to on the connecting tube between GIS equipment and the 1# check valve, and is equipped with the 4# check valve on the pipeline of secondary buffer tank gas outlet.
Furthermore, a pressure sensor is arranged on the primary buffer tank, and a pressure sensor and a temperature sensor are arranged on the secondary buffer tank.
Furthermore, the gas drying device is internally provided with a moisture absorption drying agent, such as a commonly used mesoporous molecular sieve and the like, and the gas inlet end and the gas outlet end of the gas drying deviceAll are provided with a humidity sensor, and the moisture absorption drying agent can be replaced according to the actual use condition so as to ensure the SF at the gas outlet of the gas drying equipment6The humidity meets the use requirement of GIS equipment.
Furthermore, the secondary buffer tank is externally connected with SF through a valve6Gas source, SF in GIS equipment6After the gas humidity reaches the standard, when the pressure in the GIS equipment cannot be increased to the upper limit of the working pressure fluctuation of the GIS equipment, SF6The air source supplies SF to the secondary buffer tank6And gas is introduced into the GIS equipment through the 4# check valve, so that the pressure in the GIS equipment reaches the upper limit of the working pressure fluctuation of the GIS equipment.
The invention also provides GIS equipment SF6The uninterrupted online processing method for the exceeding humidity comprises the following steps of:
(1) opening the 1# check valve, and controlling the SF with the humidity exceeding the standard within the allowable working pressure fluctuation range of the GIS equipment6The gas is led out to the primary buffer tank through the No. 1 check valve, the working pressure in the GIS equipment is reduced, and the pressure in the primary buffer tank is increased;
(2) opening the No. 2 check valve and the No. 3 check valve to enable the SF with the humidity exceeding the standard in the primary buffer tank6The gas is dried by gas drying equipment and pressurized by a compressor and then is sent to a secondary buffer tank, the pressure in the primary buffer tank is reduced, and the pressure in the secondary buffer tank is increased;
(3) when the pressure in the primary buffer tank is not lower than the lower limit of the working pressure fluctuation of the GIS equipment, closing the 1# check valve, the 2# check valve and the 3# check valve;
(4) opening the 4# check valve to enable the SF in the secondary buffer tank to be in contact with the gas6The gas is introduced into the GIS equipment, the pressure in the secondary buffer tank is reduced, and the working pressure in the GIS equipment is increased;
(5) when the pressure in the GIS equipment rises to the upper limit of the working pressure fluctuation of the GIS equipment, closing the No. 4 check valve;
(6) and (5) repeating the steps (1) and (5), wherein in the whole process, the GIS equipment operates in an allowable working pressure fluctuation range, and SF with the humidity exceeding the standard in the GIS equipment under the condition of no power outage is realized6And (4) online processing of gas.
It should be noted that, in the online processing method of the present invention, when the actually used GIS devices are different, the working pressure fluctuation ranges during normal operation are different, and the present invention can use the normal working pressure fluctuation range of the actually used GIS devices as the reference in SF6And working pressure fluctuation in the GIS equipment is strictly controlled in the circulating process of continuously leading out and leading in the gas so as to ensure the normal operation of the GIS equipment.
Further, in the step (3), when the gas pressure in the primary buffer tank is higher than the lower limit of the working pressure fluctuation of the GIS device by 0.01MPa, the 1# check valve, the 2# check valve and the 3# check valve are closed.
Furthermore, the secondary buffer tank is externally connected with SF through a valve6Gas source, in step (6), when SF in GIS equipment6After the gas humidity reaches the standard, when the pressure in the GIS equipment cannot be increased to the upper limit of the working pressure fluctuation of the GIS equipment, SF6The air source supplies SF to the secondary buffer tank6And gas is introduced into the GIS equipment through the 4# check valve, so that the pressure in the GIS equipment reaches the upper limit of the working pressure fluctuation of the GIS equipment. In the present invention, SF may exist during the on-line treatment6Loss of gas, resulting in SF in GIS equipment after the on-line treatment is finished6Although the gas humidity reaches the standard, the pressure in the GIS equipment cannot reach the upper limit of the working pressure fluctuation of the GIS equipment, and the secondary buffer tank is externally connected with SF through a valve6Gas source (e.g. SF)6Gas cylinders, etc.) as SF in a GIS device6After the gas humidity reaches the standard, when the pressure in the GIS equipment cannot be increased to the upper limit of the working pressure fluctuation of the GIS equipment, SF6The air source can supplement SF into the secondary buffer tank6And gas is introduced into the GIS equipment through the 4# check valve, so that the pressure in the GIS equipment reaches the upper limit of the working pressure fluctuation of the GIS equipment, and the whole treatment process is completed.
According to the GIS equipment used in practice, the normal working pressure of the GIS equipment is taken as the reference, and the SF with the humidity exceeding the standard is firstly subjected to pressure fluctuation within the allowable pressure fluctuation range of the GIS equipment6The gas is led out to a primary buffer tank, dried by gas drying equipment and pressurized by a compressor, and then is sent to a secondary bufferIn the tank, the water is finally led into the GIS equipment again, and the SF with the humidity exceeding the standard in the GIS equipment is realized through a plurality of times of circulation processes6The on-line processing. The invention is in SF6The pressure fluctuation in the GIS equipment is strictly controlled in the circulating process of continuously leading out, drying and leading in the gas so as to ensure the SF in the GIS equipment under the condition of no power failure6The humidity exceeds the standard, the method is simple and reliable, and the safe and stable operation of the GIS equipment is not influenced.
Drawings
FIG. 1 shows a GIS device SF according to the present invention6The structure schematic diagram of the online processing device which does not stop power supply when the humidity exceeds standard;
1, GIS equipment; 2. 1# check valve, 3# primary buffer tank, 4# check valve, 2# check valve, 5 # gas drying equipment, 51 # moisture absorption drying agent, 6 # compressor, 7 # 3# check valve, 8 # secondary buffer tank, 9 # 4# check valve, 10 # pressure sensor, 11 # temperature sensor, 12 # humidity sensor; 13. SF6And (4) a gas source.
Detailed Description
The effects of the present invention will be further described with reference to specific examples.
Referring to fig. 1, a preferred GIS device SF of the present invention6On-line processing apparatus that humidity exceeds standard and does not have a power failure, including GIS equipment 1, elementary buffer tank 3, gas drying equipment 5, compressor 6 and the secondary buffer tank 8 that connect gradually, be equipped with 1# check valve 2 on the connecting tube between GIS equipment 1 and the 3 air inlets of elementary buffer tank, be equipped with 2# check valve 4 on the connecting tube between 3 gas outlets of elementary buffer tank and the 5 air inlets of gas drying equipment, be equipped with 3# check valve 7 on the connecting tube between 6 gas outlets of compressor and the 8 air inlets of secondary buffer tank, 8 gas outlets of secondary buffer tank are connected to on the connecting tube between GIS equipment 1 and 1# check valve 2, and are equipped with 4# check valve 9 on the pipeline of 8 gas outlets of secondary buffer tank.
And the primary buffer tank is provided with a pressure sensor 10, and the secondary buffer tank is provided with a pressure sensor 10 and a temperature sensor 11.
The gas drying equipment is filled with hygroscopic desiccant, such as mesoporous molecular sieve, etc., and the gas is driedThe air inlet end and the air outlet end of the drying equipment are both provided with humidity sensors 12, and the moisture absorption drying agent can be replaced according to actual use conditions so as to ensure SF at the air outlet of the air drying equipment6The humidity meets the use requirement of GIS equipment.
The secondary buffer tank 8 is externally connected with SF through a valve6Gas source 13, SF6The gas source 13 may be SF6Gas cylinders, etc. in GIS equipment 16After the gas humidity reaches the standard, when the pressure in the GIS equipment 1 cannot be increased to the upper limit of the working pressure fluctuation of the GIS equipment 1, SF6The air source 13 replenishes SF into the secondary buffer tank 86And the gas is introduced into the GIS equipment 1 through a No. 4 check valve 9, so that the pressure in the GIS equipment 1 reaches the upper limit of the working pressure fluctuation of the GIS equipment 1.
The GIS equipment adopted in the embodiment is a TV air chamber, the rated working pressure of the GIS equipment is 0.45MPa, and the allowable pressure fluctuation range is 0.40-0.47 MPa (in order to prevent air leakage of the equipment, such as equipment operation, installation and maintenance, the initial pressure of the equipment is 0.02MPa higher than the rated working pressure, so the upper limit of the working pressure fluctuation in the TV air chamber is 0.47 MPa).
TV air chamber SF6The uninterrupted online processing method for the exceeding humidity comprises the following steps of:
(1) opening a 1# check valve to enable part of SF with over-standard humidity6The gas is led out to the primary buffer tank through the No. 1 check valve, the working pressure in the GIS equipment is reduced, the pressure in the primary buffer tank is increased, and the pressures of the two are balanced;
(2) opening the No. 2 check valve and the No. 3 check valve to enable the SF with the humidity exceeding the standard in the primary buffer tank6The gas is dried by gas drying equipment and pressurized by a compressor and then is sent to a secondary buffer tank, the pressure in the primary buffer tank is reduced, and the pressure in the secondary buffer tank is increased;
(3) when the gas pressure in the primary buffer tank is reduced to 0.41MPa, closing the 1# check valve, the 2# check valve and the 3# check valve;
(4) opening the 4# check valve, and enabling the SF with the humidity reaching the standard to be contained in the secondary buffer tank6The gas is introduced into the GIS equipment through the No. 4 check valve, the pressure in the secondary buffer tank is reduced, and the working pressure of the GIS equipment is increased;
(5) when the pressure in the GIS equipment rises to 0.47MPa, closing the No. 4 check valve;
(6) and (5) repeating the steps (1) and (5), wherein in the whole process, the GIS equipment operates in an allowable working pressure fluctuation range, and SF with the humidity exceeding the standard in the GIS equipment under the condition of no power outage is realized6Online processing of gas; if SF in GIS equipment6After the gas humidity reaches the standard, when the pressure in the GIS equipment cannot be increased to 0.47MPa, SF6The air source supplies SF to the secondary buffer tank6And introducing the gas into the GIS equipment through a No. 4 check valve, so that the pressure in the GIS equipment 1 reaches 0.47MPa, and the whole treatment process is completed.
Claims (7)
1. GIS equipment SF6Humidity does not stop online processing apparatus that exceeds standard, its characterized in that: including the GIS equipment, elementary buffer tank, gas drying equipment, compressor and the secondary buffer tank that connect gradually, be equipped with the 1# check valve on the connecting tube between GIS equipment and the elementary buffer tank air inlet, be equipped with the 2# check valve on the connecting tube between elementary buffer tank gas outlet and the gas drying equipment air inlet, be equipped with the 3# check valve on the connecting tube between compressor gas outlet and the secondary buffer tank air inlet, on the connecting tube between secondary buffer tank gas outlet is connected to GIS equipment and the 1# check valve, and be equipped with the 4# check valve on the pipeline of secondary buffer tank gas outlet.
2. GIS device SF according to claim 16Humidity does not stop online processing apparatus that exceeds standard, its characterized in that: and the primary buffer tank is provided with a pressure sensor, and the secondary buffer tank is provided with a pressure sensor and a temperature sensor.
3. GIS device SF according to claim 16Humidity does not stop online processing apparatus that exceeds standard, its characterized in that: the gas drying equipment is internally provided with a moisture absorption drying agent, and the gas inlet end and the gas outlet end of the gas drying equipment are both provided with humidity sensors.
4. GIS device SF according to claim 16Humidity does not stop online processing apparatus that exceeds standard, its characterized in that: the secondary buffer tank is externally connected with SF through a valve6And (4) a gas source.
5. GIS equipment SF6The uninterrupted online processing method for the exceeding humidity is characterized by comprising the following steps of:
(1) opening the 1# check valve, and controlling the SF with the humidity exceeding the standard within the allowable working pressure fluctuation range of the GIS equipment6The gas is led out to the primary buffer tank through the No. 1 check valve, the working pressure in the GIS equipment is reduced, and the pressure in the primary buffer tank is increased;
(2) opening the No. 2 check valve and the No. 3 check valve to enable the SF with the humidity exceeding the standard in the primary buffer tank6The gas is dried by gas drying equipment and pressurized by a compressor and then is sent to a secondary buffer tank, the pressure in the primary buffer tank is reduced, and the pressure in the secondary buffer tank is increased;
(3) when the pressure in the primary buffer tank is not lower than the lower limit of the working pressure fluctuation of the GIS equipment, closing the 1# check valve, the 2# check valve and the 3# check valve;
(4) opening the 4# check valve to enable the SF in the secondary buffer tank to be in contact with the gas6The gas is introduced into the GIS equipment, the pressure in the secondary buffer tank is reduced, and the working pressure in the GIS equipment is increased;
(5) when the working pressure in the GIS equipment is increased to the upper limit of the working pressure fluctuation of the GIS equipment, closing the No. 4 check valve;
(6) and (5) repeating the steps (1) and (5), wherein in the whole process, the GIS equipment operates in an allowable working pressure fluctuation range, and SF with the humidity exceeding the standard in the GIS equipment under the condition of no power outage is realized6And (4) online processing of gas.
6. GIS device SF according to claim 56The online processing method of the uninterrupted power supply with the humidity exceeding standard is characterized in that: and (3) closing the 1# check valve, the 2# check valve and the 3# check valve when the gas pressure in the primary buffer tank is higher than the working pressure fluctuation lower limit of the GIS device by 0.01 MPa.
7. GIS device SF according to claim 56The online processing method of the uninterrupted power supply with the humidity exceeding standard is characterized in that: the secondary buffer tank is externally connected with SF through a valve6Gas source, in step (6), when SF in GIS equipment6After the gas humidity reaches the standard, when the pressure in the GIS equipment cannot be increased to the upper limit of the working pressure fluctuation of the GIS equipment, SF6The air source supplies SF to the secondary buffer tank6And gas is introduced into the GIS equipment through the 4# check valve, so that the pressure in the GIS equipment reaches the upper limit of the working pressure fluctuation of the GIS equipment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010662417.XA CN111760425A (en) | 2020-07-10 | 2020-07-10 | GIS equipment SF6On-line processing device and method without power cut when humidity exceeds standard |
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| CN202010662417.XA CN111760425A (en) | 2020-07-10 | 2020-07-10 | GIS equipment SF6On-line processing device and method without power cut when humidity exceeds standard |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH119951A (en) * | 1997-06-20 | 1999-01-19 | Hitachi Ltd | Apparatus and method for recovering and refining sf6 gas |
| CN101498754A (en) * | 2008-02-02 | 2009-08-05 | 陕西电力科学研究院 | Method and device for judging SF6 electrical equipment malfunction by utilizing SF6 pressure fluctuation |
| CN106377980A (en) * | 2016-10-08 | 2017-02-08 | 国家电网公司 | GIS (Gas Insulated Switchgear) equipment SF6 humidity overproof no-power-outage processing method and device thereof |
| CN106512671A (en) * | 2016-11-24 | 2017-03-22 | 黑龙江省电力科学研究院 | Electrified on-line dehumidifying and purifying system of sulfur hexafluoride electric equipment |
| CN207163641U (en) * | 2017-07-13 | 2018-03-30 | 国网浙江省电力公司检修分公司 | GIS device SF6 on-line monitoring systems |
| CN108355467A (en) * | 2018-04-20 | 2018-08-03 | 国网湖北省电力有限公司电力科学研究院 | GIS gas chamber gas humidity online processing device and methods |
| CN209043520U (en) * | 2018-11-27 | 2019-06-28 | 国网河南省电力公司检修公司 | A kind of online pressure monitor system of SF6 gas having trend alarm function |
-
2020
- 2020-07-10 CN CN202010662417.XA patent/CN111760425A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH119951A (en) * | 1997-06-20 | 1999-01-19 | Hitachi Ltd | Apparatus and method for recovering and refining sf6 gas |
| CN101498754A (en) * | 2008-02-02 | 2009-08-05 | 陕西电力科学研究院 | Method and device for judging SF6 electrical equipment malfunction by utilizing SF6 pressure fluctuation |
| CN106377980A (en) * | 2016-10-08 | 2017-02-08 | 国家电网公司 | GIS (Gas Insulated Switchgear) equipment SF6 humidity overproof no-power-outage processing method and device thereof |
| CN106512671A (en) * | 2016-11-24 | 2017-03-22 | 黑龙江省电力科学研究院 | Electrified on-line dehumidifying and purifying system of sulfur hexafluoride electric equipment |
| CN207163641U (en) * | 2017-07-13 | 2018-03-30 | 国网浙江省电力公司检修分公司 | GIS device SF6 on-line monitoring systems |
| CN108355467A (en) * | 2018-04-20 | 2018-08-03 | 国网湖北省电力有限公司电力科学研究院 | GIS gas chamber gas humidity online processing device and methods |
| CN209043520U (en) * | 2018-11-27 | 2019-06-28 | 国网河南省电力公司检修公司 | A kind of online pressure monitor system of SF6 gas having trend alarm function |
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Application publication date: 20201013 |
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