CN105865556B - The detection method of sulfur hexafluoride gas leakage rate in a kind of GIS device - Google Patents
The detection method of sulfur hexafluoride gas leakage rate in a kind of GIS device Download PDFInfo
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- CN105865556B CN105865556B CN201610133151.3A CN201610133151A CN105865556B CN 105865556 B CN105865556 B CN 105865556B CN 201610133151 A CN201610133151 A CN 201610133151A CN 105865556 B CN105865556 B CN 105865556B
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- gas
- sulfur hexafluoride
- hexafluoride gas
- gis
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- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 229960000909 sulfur hexafluoride Drugs 0.000 title claims abstract description 70
- 229910018503 SF6 Inorganic materials 0.000 title claims abstract description 69
- 238000001514 detection method Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 12
- 210000002445 nipple Anatomy 0.000 claims abstract description 6
- 238000005259 measurement Methods 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- QGHDLJAZIIFENW-UHFFFAOYSA-N 4-[1,1,1,3,3,3-hexafluoro-2-(4-hydroxy-3-prop-2-enylphenyl)propan-2-yl]-2-prop-2-enylphenol Chemical group C1=C(CC=C)C(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C(CC=C)=C1 QGHDLJAZIIFENW-UHFFFAOYSA-N 0.000 claims 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 1
- 239000005864 Sulphur Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 89
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000005431 greenhouse gas Substances 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000001266 bandaging Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/86—Indirect mass flowmeters, e.g. measuring volume flow and density, temperature or pressure
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The detection method of sulfur hexafluoride gas leakage rate in a kind of GIS device, the method are to be mounted on air flow measuring apparatus close to flange or have at seal nipple, and leakage flow velocity can be transmitted back to industrial personal computer and remotely be monitored；Sulfur hexafluoride gas leakage rate is converted into according to equipment internal diameter, environment temperature, leak time by the sulfur hexafluoride gas flow velocity in measurement GIS pipeline, then by industrial personal computer special-purpose software.The device that the method is realized includes the GIS device (1) for filling sulfur hexafluoride gas, air flow measuring apparatus (2), environment temperature meter (3), sulfur hexafluoride gas pressure gauge (4), data processor (5) and industrial personal computer (6).Detection method can avoid the stoppage in transit that gas leakage causes equipment, guarantees the safe and reliable operation of equipment, while being also beneficial to carry out environmentally friendly supervision, controls the discharge of greenhouse gases.
Description
Technical field
The present invention relates to a kind of detection methods of sulfur hexafluoride gas leakage rate in GIS device, belong to substation's on-line checking
Technical field.
Background technique
Increasing with Cubicle Gas-Insulated Switchgear (GIS), the dosage of sulfur hexafluoride gas is also more next
It is bigger.The leakage of sulfur hexafluoride gas is as one of the common deficiency during gas insulated high voltage electric equipment operation, not only
The dielectric strength that will affect equipment causes unplanned power failure, and biggish greenhouse effects, greenhouse effect will be also generated to atmospheric environment
It should be 20000 times of carbon dioxide.Therefore, the work of sulfur hexafluoride gas leak detection is extremely important.
Power industry is directed in GIS substation there are the power equipment of sulfur hexafluoride gas leakage, and early stage mainly uses soap
The detection methods such as water leakage detection, bandaging strapping, hand-held leak detector, in recent years using the development of sulfur hexafluoride gas infrared characteristic it is infrared at
For picture leak detecting in equipment live, relatively far away from distance can find the concrete position of leakage, and precision is high, and testing result is non-
Chang Zhiguan, but current detection method is all difficult to carry out accurate quantitative analysis to the sulfur hexafluoride gas of GIS device internal leakage, especially
There are no detection methods for total leakage rate since the equipment installation and operation.
Summary of the invention
The object of the present invention is to for the real time leak for monitoring GIS device amount, put into operation since leakage total amount, for setting
Standby state of insulation and environmental protection supervision, the present invention disclose a kind of detection method of sulfur hexafluoride gas leakage rate in GIS device.
Realize the technical scheme is that, the detection method of sulfur hexafluoride gas leakage rate in a kind of GIS device, by gas
Body Flow speed measurer is mounted on close to flange or has at seal nipple, and leakage flow velocity can be transmitted back to industrial personal computer and carried out
Long-range monitoring；By the sulfur hexafluoride gas flow velocity in measurement GIS pipeline, then by industrial personal computer special-purpose software according in equipment
Diameter, environment temperature, leak time are converted into sulfur hexafluoride gas leakage rate.
The conversion method is as follows:
(1) flow rate calculation of GIS gas in pipelines in normal conditions, sulfur hexafluoride gas have compressibility, GIS pipe
The volume flow of gas changes with the variation of pressure and temperature in road；Under standard state or free state, the quality of gas
Flow are as follows: G=2826V ρ0d2；
Wherein, G is mass flow (kg/h)；V is the flow velocity (m/s) of gas in normal conditions；ρ0It is gas in standard
Density (kg/m under state3)；D is internal diameter of the pipeline (m)；
(2) flow rate calculation of the gas under virtual condition, under virtual condition, the pressure and temperature of GIS gas in pipelines
All change constantly, the pressure of gas is gradually reduced with the leakage of gas, manage in sulfur hexafluoride gas temperature also due to
Change with ambient enviroment different transfer of heat, so taking its statistical value under normal circumstances；With sulfur hexafluoride gas in the pipe of period
Average absolute pressure P and average ambient temperature t is calculated, reality total air leakage of sulfur hexafluoride gas leakage:
M=GT=2826 ρ0d2V1P×[273/(273+t)]×T
Wherein, G is mass flow (kg/h)；V1The flow velocity (m/s) measured under virtual condition for gas；D is in pipeline
Diameter (m)；P is sulfur hexafluoride gas average absolute pressure (Bar) in GIS gas chamber；ρ0For the density of gas in normal conditions
(kg/m3)；T is average ambient temperature (DEG C)；T is the gas leakage time (h) of statistics；Total air leakage (kg) in M- statistical time.
The method realizes sulfur hexafluoride gas by following apparatus, the inspection of sulfur hexafluoride gas leakage rate in GIS device
Surveying device includes the GIS device for filling sulfur hexafluoride gas, air flow measuring apparatus, environment temperature meter, sulfur hexafluoride gas pressure
Table, data processor, according to flow velocity carry out gas flow conversion industrial personal computer；The test side of air flow measuring apparatus is mounted on
Close to flange or having at seal nipple in GIS pipeline, the output of air flow measuring apparatus connects data processor；Environment temperature meter
Data processor is connected, sends ambient temperature information to data processor；Sulfur hexafluoride gas pressure gauge be mounted on GIS device with
In the pipeline of data processor connection；The output end of data processor connects industrial personal computer.
The GIS device is to make insulation and arc-extinguishing medium, air flow measuring apparatus installation site using sulfur hexafluoride gas
For close flange or have at seal nipple, and leakage flow velocity can be transmitted back to industrial personal computer and remotely be monitored.
Flow rate conversion method in the method can be used for calculating the real-time volume leakage rate of GIS device, since the operation
Sulfur hexafluoride gas volumetric leak amount, the total leakage rate of quality of generation realize fine-grained management, also meet environmental requirement.
The invention has the advantages that detection method of the present invention for sulfur hexafluoride gas leakage rate in GIS device, it can
To carry out real-time monitoring to the sulfur hexafluoride gas leakage rate in GIS, and the leakage total amount since putting equipment in service is calculated,
The system energy and alarm simultaneously prompt operations staff to handle, and avoid gas leakage from causing the stoppage in transit of equipment, guarantee equipment
Safe and reliable operation, while being also beneficial to carry out environmentally friendly supervision, control the discharge of greenhouse gases.
The present invention is suitable for being to insulate with the GIS electrical equipment of arc-extinguishing medium, it can be achieved that sulfur hexafluoride gas with sulfur hexafluoride
Body real time leak amount, the monitoring for leaking total amount.
Detailed description of the invention
Fig. 1 is the apparatus structure schematic diagram that the present invention realizes；
In figure, 1 is the GIS device for filling sulfur hexafluoride gas；2 be sulfur hexafluoride gas Flow speed measurer；3 be environment temperature
Meter；4 it is sulfur hexafluoride gas pressure gauge, 5 is Signal sampling and processing device；6 be industrial personal computer.
Specific embodiment
In a kind of GIS device of the present embodiment sulfur hexafluoride gas leakage rate detection method realize device as shown in Figure 1,
Device includes the GIS device 1 for filling sulfur hexafluoride gas, sulfur hexafluoride gas Flow speed measurer 2, environment temperature meter 3, sulfur hexafluoride
Gas gauge 4, Signal sampling and processing device 5 and industrial personal computer 6.
Sulfur hexafluoride gas Flow speed measurer 2 is being packed into the GIS device for filling sulfur hexafluoride gas at pipe flange
1, the data of measurement are passed to letter by sulfur hexafluoride gas Flow speed measurer 2, environment temperature meter 3 and sulfur hexafluoride gas pressure gauge 4
Number acquisition and processing unit 5, Signal sampling and processing device 5 output port connection industrial personal computer 6 be monitored, on industrial personal computer
The special-purpose software of installation will be absolute according to equipment internal diameter, sulfur hexafluoride gas density in normal conditions, environment temperature, gas chamber
The sulfur hexafluoride gas volumetric leak that pressure, leak time etc. calculate GIS device real time leak amount, occurred since the operation
Amount, mass leakage.
When the detection method of sulfur hexafluoride gas leakage rate in GIS device is used on site, if the sulfur hexafluoride gas in GIS
When body does not leak, then gas mobility status is not present in pipeline, then the flow speed value in pipe is zero；When there is gas leakage
When, the gas pressure of air leakage point can be considered as to atmospheric pressure, sulfur hexafluoride gas goes out the flow outside pipeline in GIS pipeline internal leakage
It can be calculated as follows:
1. about the flow rate calculation of GIS gas in pipelines in normal conditions
Sulfur hexafluoride gas have compressibility, the volume flow of GIS gas in pipelines with the variation of pressure and temperature and
Variation.Under standard state or free state (absolute pressure of 0 DEG C of .0.1MPa), the volume flow of gas:
Q=V × 3.14 × (d/2)2× 3600 ... ... (1),
Q=2826Vd can be obtained by (1)2... ... ... (2),
(2) formula is substituted into mass flow formula: G=Q × ρ0
Obtain G=2826V ρ0d2………………(3)
2. about flow rate calculation of the gas under virtual condition
Under virtual condition, the pressure and temperature of GIS gas in pipelines all changes constantly, and the pressure of gas is with gas
The leakage of body and be gradually reduced, manage in sulfur hexafluoride gas temperature also due to ambient enviroment different transfer of heat and change, so
Sulfur hexafluoride gas average absolute pressure P and average ambient temperature t is calculated in pipe during taking it to count under normal circumstances.
The amendment that formula (3) are carried out to pressure and temperature can further obtain the actual mass of sulfur hexafluoride gas leakage
Flow:
G=2826 ρ0d2V1P[273/(273+t)]…………………(4)
When needing to count the sulfur hexafluoride gas leakage total amount in certain time interval T,
M=GT=2826 ρ0d2V1P×[273/(273+t)]×T………………(5)
In above-mentioned formula, Q is the volume flow (m of gas in normal conditions3/h)；G is mass flow (kg/h)；V is
The flow velocity (m/s) of gas in normal conditions；V1The flow velocity (m/s) measured under virtual condition for gas；D is internal diameter of the pipeline
(m)；P is sulfur hexafluoride gas average absolute pressure (Bar) in GIS gas chamber；ρ0For the density (kg/ of gas in normal conditions
m3)；T is average ambient temperature (DEG C)；T is the gas leakage time (h) of statistics；M is total air leakage (kg) in statistical time.
It can be by the sulfur hexafluoride real time leak amount in GIS device, total leakage in statistical time according to formula (4), (5)
Meter calculates, and can be reserved for numerical value.
Claims (3)
1. the detection method of sulfur hexafluoride gas leakage rate in a kind of GIS device, which is characterized in that the method is by gas stream
Fast measuring instrument is mounted on close to flange or has at seal nipple, and leakage flow velocity can be transmitted back to industrial personal computer and carried out remotely
Monitoring；By the sulfur hexafluoride gas flow velocity in measurement GIS pipeline, then by industrial personal computer special-purpose software according to equipment internal diameter, ring
Border temperature, leak time are converted into sulfur hexafluoride gas leakage rate；
The conversion method is as follows:
(1) flow rate calculation of GIS gas in pipelines in normal conditions, sulfur hexafluoride gas has compressibility, in GIS pipeline
The volume flow of gas changes with the variation of pressure and temperature；Under standard state or free state, the mass flow of gas
Are as follows: G=2826V ρ0d2；
Wherein, G is mass flow (kg/h)；V is the flow velocity (m/s) of gas in normal conditions；ρ0In normal conditions for gas
Density (kg/m3)；D is internal diameter of the pipeline (m)；
(2) flow rate calculation of the gas under virtual condition, under virtual condition, the pressure and temperature of GIS gas in pipelines all exists
Constantly change, the pressure of gas is gradually reduced with the leakage of gas, manages interior sulfur hexafluoride gas temperature also due to week
Collarette border different transfer of heat and change, so taking its statistical value under normal circumstances；It is average with sulfur hexafluoride gas in the pipe of period
Absolute pressure P and average ambient temperature t is calculated, reality total air leakage of sulfur hexafluoride gas leakage:
M=GT=2826 ρ0d2V1P×[273/(273+t)]×T
Wherein, G is mass flow (kg/h)；V1The flow velocity (m/s) measured under virtual condition for gas；D is internal diameter of the pipeline (m)；
P is sulfur hexafluoride gas average absolute pressure (Bar) in GIS gas chamber；ρ0For the density (kg/m of gas in normal conditions3)；t
For average ambient temperature (DEG C)；T is the gas leakage time (h) of statistics；Total air leakage (kg) in M- statistical time.
2. according to claim 1 in a kind of GIS device sulfur hexafluoride gas leakage rate detection method, which is characterized in that
The device that the method is realized includes the GIS device for filling sulfur hexafluoride gas, air flow measuring apparatus, environment temperature meter, hexafluoro
Change sulphur gas gauge and data processor, according to the industrial personal computer of flow velocity progress gas flow conversion；Air flow measuring apparatus
Test side is mounted in GIS pipeline close to flange or has at seal nipple, and the output of air flow measuring apparatus connects data processing
Device；Environment temperature meter connects data processor, sends ambient temperature information to data processor；Sulfur hexafluoride gas pressure gauge peace
In the pipeline that GIS device is connect with data processor；The output end of data processor connects industrial personal computer.
3. according to claim 1 in a kind of GIS device sulfur hexafluoride gas leakage rate detection method, which is characterized in that
Flow rate conversion method in the method can be used for calculating the real-time volume leakage rate of GIS device, occurred since the operation six
Sulfur fluoride gas volume leakage rate, the total leakage rate of quality.
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| JP7037466B2 (en) * | 2018-10-09 | 2022-03-16 | 株式会社コスモ計器 | Control device, flow sensitivity correction method, program |
| CN109253900A (en) * | 2018-10-31 | 2019-01-22 | 国网重庆市电力公司电力科学研究院 | A kind of sulfur hexafluoride sampling method |
| CN112903211A (en) * | 2021-03-29 | 2021-06-04 | 广州燃气集团有限公司 | Equipment and method for detecting tightness of gas pipeline |
| CN113125300A (en) * | 2021-04-12 | 2021-07-16 | 国网河北省电力有限公司衡水供电分公司 | Sulfur hexafluoride density quality transmission device and system with wireless transmission and transmitter |
| CN114323459B (en) * | 2021-11-22 | 2024-04-26 | 华能海南发电股份有限公司海口电厂 | Front end detection unit device |
| CN115436221B (en) * | 2022-07-29 | 2024-10-11 | 上海思源高压开关有限公司 | GIS cylinder gas density detection method and detection mechanism under low-temperature working condition |
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