CN109444346A - Gas on-line monitoring system and monitoring method - Google Patents
Gas on-line monitoring system and monitoring method Download PDFInfo
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- CN109444346A CN109444346A CN201811548903.8A CN201811548903A CN109444346A CN 109444346 A CN109444346 A CN 109444346A CN 201811548903 A CN201811548903 A CN 201811548903A CN 109444346 A CN109444346 A CN 109444346A
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- solenoid ball
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—Specially adapted to detect a particular component
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Abstract
Gas on-line monitoring system, including sample and recharge gas circuit and cycle detection gas circuit；Cycle detection gas circuit is ring seal gas circuit, is disposed with first liang of logical Solenoid ball valve, second liang of logical Solenoid ball valve, flowmeter, small flow air pump, detection instrument, first pressure transmitter, surge tank and big flow air pump along airflow direction in cycle detection gas circuit；Flow is calculated as the flowmeter of adjustable flow；The air inlet for sampling and recharging gas circuit is connected with sulfur hexafluoride gas source, and the gas outlet for sampling and recharging gas circuit is connected between first liang of logical Solenoid ball valve of cycle detection gas circuit and second liang of logical Solenoid ball valve.The invention also discloses the monitoring methods of gas on-line monitoring system.The present invention is used and is sampled from high-tension switch gear, recycle sampling gas in detection gas circuit, it is finally pressed into the on-line monitoring mode of high-tension switch gear, the existing sampling gas existing for pressure measurement method online is can avoid and does not have the drawbacks of representative, reliable measuring data is difficult to ensure.
Description
Technical field
The invention belongs to gas detection technology fields, and in particular to a kind of gas on-line monitoring system and monitoring method.
Background technique
Sulfur hexafluoride (SF6) gas have excellent insulation and arc extinction performance, can greatly reduce and set as dielectric
Standby size, therefore it is widely used in gas insulation breaker, gas insulated combined electrical equipment (Gas Iusulated Sub
Station, GIS), transformer, in the various electrical equipments such as mutual inductor.Pure SF6Chemical property is stablized, under normal condition
It is not easily decomposed.However, due to SF6Air insulating device is likely to occur various defects in manufacture, installation or operation, and then occurs
Electric discharge (arc discharge, spark discharge, shelf depreciation) and overheating fault, lead to SF6Gas is decomposed, and a variety of low fluorine sulphur are generated
Compound, these low-fluorine sulfides can generate hydrogen fluoride (HF), titanium dioxide with impurity such as micro-moisture, oxygen existing for equipment inside
Sulphur (SO2), hydrogen sulfide (H2S), it is fluorinated thionyl (SOF2), fluorination sulfonyl (SO2F2) etc. compounds.If electric discharge phenomena appear in solid
Near body dielectric, CF will additionally generate4、CO、CO2Deng decomposition combination product.The features such as its content, generating rate are and equipment
Built-in electrical insulation degradation has very close relationship, can be used as the foundation for judging insulator arrangement early stage Hidden fault.
According to the regulation of relevant criterion, running sulfur hexafluoride (SF6) outlet openings equipment, it needs to monitor on-line inside it
The impurity contents such as purity, humidity (micro- water), the decomposition product of gas.Due to being to measure online in pressure, measurement is installation point
Neighbouring gas does not have representativeness, so, the reliability of measurement data is just difficult to ensure.
Summary of the invention
The present invention in order to solve shortcoming in the prior art, provide a kind of structure it is simple, convenient for operation, DATA REASONING
Highly reliable gas on-line monitoring system and monitoring method.
In order to solve the above technical problems, the present invention adopts the following technical scheme: gas on-line monitoring system, including sampling and
Recharge gas circuit and cycle detection gas circuit；
Cycle detection gas circuit is ring seal gas circuit, is disposed with first liang of energization magnetic along airflow direction in cycle detection gas circuit
Ball valve, second liang of logical Solenoid ball valve, flowmeter, small flow air pump, detection instrument, first pressure transmitter, surge tank and big stream
Measure air pump；Flow is calculated as the flowmeter of adjustable flow；
The air inlet for sampling and recharging gas circuit is connected with sulfur hexafluoride gas source, and the gas outlet for sampling and recharging gas circuit is connected to circulation
Between the first liang of logical Solenoid ball valve and second liang of logical Solenoid ball valve for detecting gas circuit.
It samples and recharges and be disposed with shut-off valve, second pressure transmitter and the energization of third two along airflow direction in gas circuit
Magnetic ball valve.
Detection instrument is sulfur hexafluoride gas humidity measurement instrument, sulphur hexafluoride gas purity detector or sulfur hexafluoride gas
The set of decomposed product detector or any two above-mentioned detectors or three kinds of detectors.
The monitoring method of gas on-line monitoring system, includes the following steps,
(1) shut-off valve, third two are opened and leads to Solenoid ball valve and second liang of logical Solenoid ball valve, gas to be detected is from sulfur hexafluoride gas
Source stream goes out, and flows into cycle detection gas circuit along sampling and recharging gas circuit；
(2) sulfur hexafluoride gas successively passes through in second liang of logical Solenoid ball valve, flowmeter and detection instrument, is flowed into air accumulator
It is interior；
(3) it is then shut off third two and leads to Solenoid ball valve, open first liang of logical Solenoid ball valve and second liang of logical Solenoid ball valve, start small
Flow air pump, gas recycle in cycle detection gas circuit under the effect of small flow air pump, until detection instrument detected value is stablized；
(4) then, it opens third two and leads to Solenoid ball valve, shut-off valve, close first liang of logical Solenoid ball valve, open big flow air pump,
Gas in cycle detection gas circuit is recharged under the effect of big flow air pump into sulfur hexafluoride gas source to be detected.
(5) 3-5 step (1)-(4) are repeated, multiple detected values are obtained, improve detection accuracy.
By adopting the above technical scheme, first liang of logical Solenoid ball valve, second liang of logical Solenoid ball valve and third two are logical in the present invention
The switch of Solenoid ball valve is realized by PLC control system and is automatically controlled.The sulfur hexafluoride gas flow velocity of flowmeter control sampling.
When detection, which finishes, to be needed sulfur hexafluoride gas pushing back switchgear, air accumulator is used to cache the gas after detection, when
When pressure reaches certain value, start big flow air pump, the gas in cycle detection gas circuit is pushed back sulfur hexafluoride gas source, and (height presses off
Close equipment) in.
The present invention recycles sampling gas in detection gas circuit, is finally pressed into high pressure using sampling from high-tension switch gear
The on-line monitoring mode of switchgear can avoid the existing sampling gas existing for pressure measurement method online and not have representativeness,
The drawbacks of reliable measuring data is difficult to ensure.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Specific embodiment
As shown in Figure 1, gas on-line monitoring system of the invention, including sample and recharge gas circuit 1 and cycle detection gas circuit
2；
Cycle detection gas circuit 2 is ring seal gas circuit, is disposed with first liang of energization along airflow direction in cycle detection gas circuit 2
3, second liang of logical Solenoid ball valves 4 of magnetic ball valve, flowmeter 5, small flow air pump 6, detection instrument 7, first pressure transmitter 8, buffering
Tank 9 and big flow air pump 10；Flowmeter 5 is the flowmeter of adjustable flow；
The air inlet for sampling and recharging gas circuit 1 is connected with sulfur hexafluoride gas source 14, and the gas outlet for sampling and recharging gas circuit 1 is connected to
Between the logical Solenoid ball valve 3 of first liang of cycle detection gas circuit 2 and second liang of logical Solenoid ball valve 4.
It samples and recharges and be disposed with shut-off valve 11, second pressure transmitter 12 and third along airflow direction in gas circuit 1
Two logical Solenoid ball valves 13.
Detection instrument 7 is sulfur hexafluoride gas humidity measurement instrument, sulphur hexafluoride gas purity detector or sulfur hexafluoride gas
The set of body decomposed product detector or any two above-mentioned detectors or three kinds of detectors.
The monitoring method of gas on-line monitoring system, comprising the following steps:
(1) shut-off valve 11, third two are opened and leads to Solenoid ball valve 13 and second liang of logical Solenoid ball valve 4, gas to be detected is from hexafluoro
Change sulphur gas source 14 to flow out, flows into cycle detection gas circuit 2 along sampling and recharging gas circuit 1；
(2) sulfur hexafluoride gas successively passes through in second liang of logical Solenoid ball valve 4, flowmeter 5 and detection instrument 7, is flowed into gas storage
In tank；
(3) it is then shut off third two and leads to Solenoid ball valve 13, open first liang of logical Solenoid ball valve 3 and second liang of logical Solenoid ball valve 4, open
Small flow air pump 6 is moved, gas recycles in cycle detection gas circuit 2 under the effect of small flow air pump 6, until detection instrument 7 detects
Value is stablized；
(4) then, it opens third two and leads to Solenoid ball valve 13, shut-off valve 11, close first liang of logical Solenoid ball valve 3, open big flow
Air pump 10, the gas in cycle detection gas circuit 2 are recharged under the effect of big flow air pump 10 to sulfur hexafluoride gas source to be detected
In 14.
(5) 3-5 step (1)-(4) are repeated, multiple detected values are obtained, improve detection accuracy.
The present embodiment not makes any form of restriction shape of the invention, material, structure etc., all according to this hair
Bright technical spirit any simple modification, equivalent change and modification to the above embodiments, belong to the technology of the present invention side
The protection scope of case.
Claims (4)
1. gas on-line monitoring system, it is characterised in that: including sampling and recharging gas circuit and cycle detection gas circuit；
Cycle detection gas circuit is ring seal gas circuit, is disposed with first liang of energization magnetic along airflow direction in cycle detection gas circuit
Ball valve, second liang of logical Solenoid ball valve, flowmeter, small flow air pump, detection instrument, first pressure transmitter, surge tank and big stream
Measure air pump；Flow is calculated as the flowmeter of adjustable flow；
The air inlet for sampling and recharging gas circuit is connected with sulfur hexafluoride gas source, and the gas outlet for sampling and recharging gas circuit is connected to circulation
Between the first liang of logical Solenoid ball valve and second liang of logical Solenoid ball valve for detecting gas circuit.
2. gas on-line monitoring system according to claim 1, it is characterised in that: sample and recharge in gas circuit along air-flow side
Lead to Solenoid ball valve to shut-off valve, second pressure transmitter and third two is disposed with.
3. gas on-line monitoring system according to claim 2, it is characterised in that: detection instrument is that sulfur hexafluoride gas is wet
Spend detector, sulphur hexafluoride gas purity detector or sulfur hexafluoride gas decomposed product detector or any two above-mentioned inspections
Survey the set of instrument or three kinds of detectors.
4. the monitoring method of gas on-line monitoring system according to claim 3, it is characterised in that: include the following steps,
(1) shut-off valve, third two are opened and leads to Solenoid ball valve and second liang of logical Solenoid ball valve, gas to be detected is from sulfur hexafluoride gas
Source stream goes out, and flows into cycle detection gas circuit along sampling and recharging gas circuit；
(2) sulfur hexafluoride gas successively passes through in second liang of logical Solenoid ball valve, flowmeter and detection instrument, is flowed into air accumulator
It is interior；
(3) it is then shut off third two and leads to Solenoid ball valve, open first liang of logical Solenoid ball valve and second liang of logical Solenoid ball valve, start small
Flow air pump, gas recycle in cycle detection gas circuit under the effect of small flow air pump, until detection instrument detected value is stablized；
(4) then, it opens third two and leads to Solenoid ball valve, shut-off valve, close first liang of logical Solenoid ball valve, open big flow air pump,
Gas in cycle detection gas circuit is recharged under the effect of big flow air pump into sulfur hexafluoride gas source to be detected；
(5) 3-5 step (1)-(4) are repeated, multiple detected values are obtained, improve detection accuracy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811548903.8A CN109444346A (en) | 2018-12-18 | 2018-12-18 | Gas on-line monitoring system and monitoring method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811548903.8A CN109444346A (en) | 2018-12-18 | 2018-12-18 | Gas on-line monitoring system and monitoring method |
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| Publication Number | Publication Date |
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| CN109444346A true CN109444346A (en) | 2019-03-08 |
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| CN201811548903.8A Pending CN109444346A (en) | 2018-12-18 | 2018-12-18 | Gas on-line monitoring system and monitoring method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110954656A (en) * | 2019-11-20 | 2020-04-03 | 国网河南省电力公司平顶山供电公司 | Gaseous detection refilling device of SF6 switch |
| CN112540065A (en) * | 2020-11-30 | 2021-03-23 | 广西电网有限责任公司电力科学研究院 | Detection apparatus for trace sulfur dioxide in sulfur hexafluoride |
| CN113030398A (en) * | 2021-03-29 | 2021-06-25 | 广东电网有限责任公司东莞供电局 | Online SF6 gas monitoring device |
| CN113720973A (en) * | 2021-10-19 | 2021-11-30 | 中国电力科学研究院有限公司 | SF inside GIS equipment6Gas monitoring system and monitoring method |
| CN114324109A (en) * | 2021-12-28 | 2022-04-12 | 临海伟星新型建材有限公司 | Interior bushing pipe gas permeation detection device |
-
2018
- 2018-12-18 CN CN201811548903.8A patent/CN109444346A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110954656A (en) * | 2019-11-20 | 2020-04-03 | 国网河南省电力公司平顶山供电公司 | Gaseous detection refilling device of SF6 switch |
| CN112540065A (en) * | 2020-11-30 | 2021-03-23 | 广西电网有限责任公司电力科学研究院 | Detection apparatus for trace sulfur dioxide in sulfur hexafluoride |
| CN113030398A (en) * | 2021-03-29 | 2021-06-25 | 广东电网有限责任公司东莞供电局 | Online SF6 gas monitoring device |
| CN113720973A (en) * | 2021-10-19 | 2021-11-30 | 中国电力科学研究院有限公司 | SF inside GIS equipment6Gas monitoring system and monitoring method |
| CN114324109A (en) * | 2021-12-28 | 2022-04-12 | 临海伟星新型建材有限公司 | Interior bushing pipe gas permeation detection device |
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