CN107477354B - A kind of sulfur hexafluoride/nitrogen mixed gas air charging system and method - Google Patents
A kind of sulfur hexafluoride/nitrogen mixed gas air charging system and method Download PDFInfo
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- CN107477354B CN107477354B CN201710807931.6A CN201710807931A CN107477354B CN 107477354 B CN107477354 B CN 107477354B CN 201710807931 A CN201710807931 A CN 201710807931A CN 107477354 B CN107477354 B CN 107477354B
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Classifications
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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
-
- 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
-
- 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
- F17C2221/03—Mixtures
- F17C2221/031—Air
-
- 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
- F17C2227/04—Methods for emptying or filling
- F17C2227/046—Methods for emptying or filling by even emptying or filling
-
- 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
- F17C2250/06—Controlling or regulating of parameters as output values
- F17C2250/0605—Parameters
- F17C2250/0626—Pressure
-
- 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
- F17C2250/075—Action when predefined value is reached when full
Abstract
The present invention discloses a kind of sulfur hexafluoride/nitrogen mixed gas air charging system and method, comprising: SF6Intake interface, N2Intake interface, flow control valve group, vacuumizes module and inflation outlet at monitoring modular；SF6Intake interface, N2Intake interface, monitoring modular, vacuumize module and inflation outlet be connected with flow control valve group；Flow control valve group is multiple-way valve；S is provided in flow control valve group1、S2、S3、S4And S5Five valves；S1It is arranged in SF6Gas cylinder and SF6Between intake interface, S2It is arranged in N2Gas cylinder and N2Between intake interface, S3It is arranged between monitoring modular and multiple-way valve, S4Setting is vacuumizing between module and multiple-way valve, S5Setting is in inflation outlet and between air charging system.The present invention is inflated current transformer by mixed gas air charging system, has not only been able to satisfy scene inflation to the accuracy requirement and insulating requirements of ratio of gas mixture, pressure, but also operation is convenient, cost is relatively low.
Description
Technical field
The invention belongs to air charging system technical field, in particular to a kind of sulfur hexafluoride suitable for high-voltage electrical equipment/
Nitrogen mixed gas air charging system and method.
Background technique
SF6Gas is the insulating gas for uniquely obtaining industrial application so far because of its excellent insulation and arc extinction performance,
Have been widely used for breaker, fully closed combined electric unit (GIS), power transformer, direct current transportation reversal valve and Current Mutual Inductance
In the equipment such as device.But SF6Gas is strong greenhouse gases, and global warming coefficient is about carbon dioxide (CO2) 23900
Times, once leakage can generate pollution lasting for a long time to environment, global range is interior to SF6The limitation that gas uses is more and more tighter
Lattice, substitution, decrement use are trends of the times.
In SF6Middle addition N2、CO2Or the common gases such as air constitute binary mixture and show various superiority.Mesh
Before, only SF6/N2Mixed gas has obtained certain applications in engineering in practice, but is limited only to gas-insulated metal-enclosed transmission of electricity
The bus gas chamber of route (GIL) and GIS device.
Currently, being directed to SF6/N2The research of mixed gas air charging system is less, there is not yet the report of engineer application.Mixing
The filling effect of gas directly affects the operational reliability of power equipment, the complexity of mixed gas filling process also direct shadow
Installation and debugging expense and the period of power equipment are rung, therefore, researches and develops SF6/N2Mix gas inflator, it is existing reality it is urgent
Demand, and have technological challenge, it is of great significance.
Summary of the invention
The purpose of the present invention is to provide a kind of sulfur hexafluoride/nitrogen mixed gas air charging system and methods, on solving
State technical problem.The present invention had both been able to satisfy scene inflation to SF6/N2Ratio of gas mixture, the accuracy requirement of pressure and insulation are wanted
It asks, and has many advantages, such as that operation is convenient, cost is relatively low.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of sulfur hexafluoride/nitrogen mixed gas air charging system, comprising: SF6Intake interface, N2Intake interface, monitoring mould
Block, flow control valve group vacuumize module and inflation outlet；SF6Intake interface, N2Intake interface, vacuumizes mould at monitoring modular
Block and inflation outlet are connected with flow control valve group；Flow control valve group is multiple-way valve；It is provided in flow control valve group
S1、S2、S3、S4And S5Five valves；S1It is arranged in SF6Gas cylinder and SF6Between intake interface, S2It is arranged in N2Gas cylinder and N2Air inlet connecting
Between mouthful, S3It is arranged between monitoring modular and multiple-way valve, S4Setting is vacuumizing between module and multiple-way valve, S5Setting is being filled
Gas exports and between air charging system.
Further, vacuumizing module is vacuum pump.
Further, monitoring modular includes precision temperature table, pressure gauge and density meter；Flow control valve group passes through S3 connection
The precision pressure gauge and density meter of monitoring modular；Thermometer waits for gas temperature in air charging system, precision pressure for real-time monitoring
Table is for detecting the blowing pressure, according to the blowing pressure that monitoring data and precision pressure gauge of the thermometer to gas temperature obtain,
Density meter can be converted to obtain the gas density in air charging system by real time temperature.
Further, flow regulating unit, flow regulating unit Connection Density table are equipped in flow control valve group；Density meter
The density value information of monitoring is sent to flow regulating unit, and the start and stop and flow for controlling flow control valve group are adjusted.
Further, the flow velocity gear of flow control valve group is triggered by current charge density value, and flow velocity gear is with density
The raising of value and reduce；It is respectively set 50%, 25%, 10% 3 adjusting node, when density value is close to preset value, flow velocity is gradually
Reduce, is reduced to 50%, 25% and the 10% of original flow respectively；When density value reaches the 50% of final densities, flow velocity gear
It is the 50% of maximum stream flow；When density value reaches the 75% of final densities, flow velocity gear is the 25% of maximum stream flow；Density value arrives
Up to final densities 90% when, flow velocity gear be maximum stream flow 10%.
A kind of sulfur hexafluoride/nitrogen mixed gas inflation method, comprising: first by S5 valve and target device Current Mutual Inductance
Device connector is connected, and opens S1/S2/S3/S4 valve, closes S5 valve, opening vacuumizes module, to residual gas in valve group and pipeline
Body is vacuumized；SF is required according to inflation6/N2Ratio, calculate mixed gas corresponding current mutual inductor nominal pressure equivalence
Pressure detects environment temperature using thermometer, and reciprocity duty pressure carries out temperature correction, the pressure after being corrected；Utilize partial pressure
Law calculates SF6、N2Respectively partial pressure；Valve group S1, S3, S5 are opened, valve S2, S4 is closed, current transformer inside is filled with
SF6, after calculating partial pressure to be achieved, S1 is closed, S2 is opened, N is filled with to current transformer inside2Pressure after to correction is completed to fill
Gas process.
Further, in gas replenishment process: firstly, to SF is filled with inside current transformer6, SF6Density is continuously improved, when
Monitor SF6Density value reaches default SF6Partial pressure corresponding density value 50%, 75%, 90% when, trigger flow-control module, drop
Low inflation flow velocity is positive 50%, 25% and the 10% of normal flow velocity, until SF6Inflation terminates；Then, into N2Aeration phase works as prison
Survey SF6/N2When mixed gas density value reaches 50%, 75%, the 90% of final mixed gas corresponding density value, flow monitoring mould
Block triggers flow-control module, reduces inflation flow velocity and is positive 50%, 25% and the 10% of normal flow velocity, until N2Inflation terminates, complete
At entire mixed gas gas replenishment process.
Compared with the existing technology, the invention has the following advantages: the present invention passes through mixed gas air charging system to electricity
Current transformer is inflated, and has not only been able to satisfy requirement of the scene inflation to ratio of gas mixture accuracy, but also to be able to satisfy operation convenient
With the requirement of insulation, and cost is relatively low.
Detailed description of the invention
Fig. 1 is a kind of system pie graph of sulfur hexafluoride/nitrogen mixed gas air charging system of the present invention；
Fig. 2 is a kind of structural schematic diagram of sulfur hexafluoride/nitrogen mixed gas air charging system of the present invention.
Specific embodiment
Refering to Figure 1, a kind of sulfur hexafluoride/nitrogen mixed gas air charging system of the present invention, comprising: intake interface,
Monitoring modular, vacuumizes module and mixed gas outlet at flow control valve group.Intake interface, monitoring modular, vacuumize module and
Mixed gas outlet is all connected with flow control valve group.
It please refers to shown in Fig. 2, flow control valve group 1 is multiple-way valve；In flow control valve group 1 have S1, S2, S3, S4 and
Five valves of S5；S1, S2 are separately connected SF as intake interface6Gas cylinder 2 and N2Gas cylinder 3.Five valves use standard interface, can
It is connect with facilitating with gas cylinder with loading line.
The valve S4 connection of flow control valve group 1 vacuumizes module；Vacuumizing module is vacuum pump 5.Vacuum pump 5 can be right
Pipeline carries out vacuumize process, avoids influence of the residual gas to mixed gas in pipeline.The valve S5 of flow control valve group 1 makees
For mixed gas outlet, it is used to connect to air charging system.
Monitoring modular 4 includes precision temperature table, pressure gauge and density meter；Flow control valve group 1 monitors mould by S3 connection
The precision pressure gauge and density meter of block；Thermometer waits for that gas temperature in air charging system, precision pressure gauge 3 are used for for real-time monitoring
The blowing pressure is detected, according to the blowing pressure that monitoring data and precision pressure gauge of the thermometer to gas temperature obtain, density meter
It can convert to obtain the gas density in air charging system by real time temperature.
Flow regulating unit, flow regulating unit Connection Density table are equipped in flow control valve group 1；Density meter monitors close
Angle value information is sent to flow regulating unit, and the start and stop and flow for controlling flow control valve group 1 are adjusted.
Flow control gear is arranged in flow regulating unit, with monitoring modular Two-way Feedback.Flow velocity gear is close by currently inflating
Angle value triggering, is respectively set 50%, 25%, 10% 3 adjusting node.Flow velocity gear is reduced with the raising of density value, i.e.,
When density value is close to preset value, flow velocity is gradually reduced, and is reduced to 50%, 25% and the 10% of original flow respectively, can be expired
Sufficient measuring density module refresh time guarantees that gas replenishment process will not overcharge.When density value reaches the 50% of final densities, flow velocity shelves
Position is the 50% of maximum stream flow；When density value reaches the 75% of final densities, flow velocity gear is the 25% of maximum stream flow；Density value
When reaching the 90% of final densities, flow velocity gear is the 10% of maximum stream flow.
A kind of sulfur hexafluoride/nitrogen mixed gas inflation method of the present invention, can be according to actual needs using air charging system
Mixed gas filling is carried out to high voltage electric equipment；Specifically includes the following steps:
S5 valve is connected with target device current transformer connector first, opens S1/S2/S3/S4 valve, closes S5 valve
Door is opened vacuum pump 5, is vacuumized to residual gas in valve group and pipeline, detects vacuum degree using vacuum meter；According to inflation
It is required that SF6/N2Ratio, calculate mixed gas corresponding current mutual inductor nominal pressure equivalent pressure, utilize thermometer detect ring
Border temperature, reciprocity duty pressure carry out temperature correction, the pressure after being corrected；Using the law of partial pressure, SF is calculated6、N2Respectively divide
Pressure；Valve group S1, S3, S5 are opened, valve S2, S4 is closed, SF is filled with to current transformer inside6, after calculating partial pressure to be achieved, close
S1 is closed, S2 is opened, N is filled with to current transformer inside2Pressure after to correction.After entire gas replenishment process, valve is closed
S1-S5 stands current transformer 24 hours, guarantees that gas mixing is uniform.
In gas replenishment process, flow value adjusts the control process of unit are as follows: firstly, to SF is filled with inside current transformer6,
SF6Density is continuously improved, as monitoring SF6Density value reaches default SF6Partial pressure corresponding density value 50%, 75%, 90% when,
It will trigger flow-control module, reduce inflation flow velocity and be positive 50%, 25% and the 10% of normal flow velocity, until SF6Inflation terminates；
Then, into N2Aeration phase, as monitoring SF6/N2Mixed gas density value reaches final mixed gas corresponding density value
50%, 75%, 90% when, flow monitoring module will trigger flow-control module, reduce inflation flow velocity and be positive normal flow velocity
50%, 25% and 10%, until N2Inflation terminates.It is finally completed entire mixed gas gas replenishment process.
Claims (3)
1. a kind of sulfur hexafluoride/nitrogen mixed gas air charging system characterized by comprising SF6Intake interface, N2Air inlet connecting
Mouth, flow control valve group (1), vacuumizes module and inflation outlet at monitoring modular；SF6Intake interface, N2Intake interface, monitoring mould
Block, vacuumize module and inflation outlet be connected with flow control valve group (1)；Flow control valve group (1) is multiple-way valve；Flow
Five valves of S1, S2, S3, S4 and S5 are provided in control valve group (1)；S1 is arranged in SF6Gas cylinder (2) and SF6Intake interface it
Between, S2 is arranged in N2Gas cylinder (3) and N2Between intake interface, S3 is arranged between monitoring modular and multiple-way valve, and S4 setting is being taken out very
Between empty module and multiple-way valve, S5 setting is in inflation outlet and between air charging system；
Vacuumizing module is vacuum pump；
Monitoring modular includes precision temperature table, precision pressure gauge and density meter；Flow control valve group (1) monitors mould by S3 connection
The precision pressure gauge and density meter of block；Thermometer waits for that gas temperature in air charging system, precision pressure gauge are used for for real-time monitoring
The blowing pressure is detected, according to the blowing pressure that monitoring data and precision pressure gauge of the thermometer to gas temperature obtain, density meter
It can convert to obtain the gas density in air charging system by real time temperature；
Flow regulating unit, flow regulating unit Connection Density table are equipped in flow control valve group (1)；The density of density meter monitoring
Value information is sent to flow regulating unit, and the start and stop and flow for controlling flow control valve group (1) are adjusted；
The flow velocity gear of flow control valve group (1) is triggered by current charge density value, flow velocity gear with the raising of density value and
It reduces；It is respectively set 50%, 25%, 10% 3 adjusting node, when density value is close to preset value, flow velocity is gradually reduced, respectively
It is reduced to 50%, 25% and the 10% of original flow；When density value reaches the 50% of final densities, flow velocity gear is maximum stream flow
50%；When density value reaches the 75% of final densities, flow velocity gear is the 25% of maximum stream flow；Density value reaches final densities
90% when, flow velocity gear be maximum stream flow 10%.
2. a kind of sulfur hexafluoride/nitrogen mixed gas inflation method, which is characterized in that be based on described in claim 1 a kind of six
Sulfur fluoride/nitrogen mixed gas air charging system, comprising:
S5 valve is connected with target device current transformer connector first, opens S1/S2/S3/S4 valve, closes S5 valve,
Opening vacuumizes module (5), vacuumizes to residual gas in valve group and pipeline；SF is required according to inflation6/N2Ratio, meter
The equivalent pressure for calculating mixed gas corresponding current mutual inductor nominal pressure detects environment temperature, reciprocity duty pressure using thermometer
Carry out temperature correction, the pressure after being corrected；Using the law of partial pressure, SF is calculated6、N2Respectively partial pressure；Opening valve group S1, S3,
S5 closes valve S2, S4, is filled with SF to current transformer inside6, after calculating partial pressure to be achieved, S1 is closed, S2 is opened, to electricity
N is filled with inside current transformer2Pressure after to correction completes gas replenishment process.
3. a kind of sulfur hexafluoride/nitrogen mixed gas inflation method according to claim 2, which is characterized in that inflating
In the process: firstly, to SF is filled with inside current transformer6, SF6Density is continuously improved, as monitoring SF6Density value reaches default SF6
Partial pressure corresponding density value 50%, 75%, 90% when, trigger flow-control module, reduce inflation flow velocity and be positive normal flow velocity
50%, 25% and 10%, until SF6Inflation terminates；Then, into N2Aeration phase, as monitoring SF6/N2Mixed gas density value
When reaching 50%, 75%, the 90% of final mixed gas corresponding density value, flow monitoring module triggers flow-control module, drop
Low inflation flow velocity is positive 50%, 25% and the 10% of normal flow velocity, until N2Inflation terminates, and completes entire mixed gas and inflated
Journey.
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| CN201710807931.6A CN107477354B (en) | 2017-09-08 | 2017-09-08 | A kind of sulfur hexafluoride/nitrogen mixed gas air charging system and method |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108870066A (en) * | 2018-06-21 | 2018-11-23 | 南方电网科学研究院有限责任公司 | A kind of insulating gas inflation method for power equipment |
| CN108931573A (en) * | 2018-08-24 | 2018-12-04 | 国家电网有限公司 | A kind of simulation sulfur hexafluoride/nitrogen decomposition product experimental provision |
| CN109386731B (en) * | 2018-12-05 | 2024-02-20 | 河南送变电建设有限公司 | SF6 gas automatic filling system and filling method of GIS equipment |
| CN109406971A (en) * | 2018-12-12 | 2019-03-01 | 云南电网有限责任公司电力科学研究院 | A kind of gas breakdown property testing system and method |
| CN109529644A (en) * | 2018-12-29 | 2019-03-29 | 云南电网有限责任公司电力科学研究院 | A kind of quick mixed gas method and system based on controllable electromagnetic valve |
| CN109737305B (en) * | 2019-03-15 | 2020-12-01 | 国网陕西省电力公司电力科学研究院 | Inflation device for sulfur hexafluoride and nitrogen mixed gas and operation method of inflation device |
| CN114279496A (en) * | 2021-12-17 | 2022-04-05 | 中国科学院长春光学精密机械与物理研究所 | Gas optical isolation device and method thereof |
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Address after: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee after: STATE GRID CORPORATION OF CHINA Patentee after: STATE GRID SHAANXI ELECTRIC POWER Research Institute Address before: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee before: State Grid Corporation of China Patentee before: STATE GRID SHAANXI ELECTRIC POWER Research Institute |
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Effective date of registration: 20221220 Address after: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee after: STATE GRID CORPORATION OF CHINA Patentee after: STATE GRID SHAANXI ELECTRIC POWER Research Institute Patentee after: National Network (Xi'an) Environmental Protection Technology Center Co.,Ltd. Address before: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee before: STATE GRID CORPORATION OF CHINA Patentee before: STATE GRID SHAANXI ELECTRIC POWER Research Institute |
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