CN207650972U - SF6 gases leakage monitoring and alarm system - Google Patents
SF6 gases leakage monitoring and alarm system Download PDFInfo
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- CN207650972U CN207650972U CN201721749371.5U CN201721749371U CN207650972U CN 207650972 U CN207650972 U CN 207650972U CN 201721749371 U CN201721749371 U CN 201721749371U CN 207650972 U CN207650972 U CN 207650972U
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- 239000007789 gas Substances 0.000 title claims abstract description 59
- 238000012544 monitoring process Methods 0.000 title claims abstract description 36
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000001301 oxygen Substances 0.000 claims abstract description 12
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 12
- 238000004458 analytical method Methods 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 238000005516 engineering process Methods 0.000 claims description 10
- 238000001745 non-dispersive infrared spectroscopy Methods 0.000 claims description 4
- 239000004615 ingredient Substances 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 description 16
- 230000006870 function Effects 0.000 description 7
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- 238000005259 measurement Methods 0.000 description 5
- 238000002329 infrared spectrum Methods 0.000 description 4
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- 230000008569 process Effects 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 208000028867 ischemia Diseases 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model is related to a kind of electric power safety detecting systems, i.e. SF6 gases leakage monitoring and alarm system.It includes：Collector is the collection terminal of entire leakage monitoring, and multiple collection points are arranged, and is mainly used for collecting the SF6 gases of leakage；Analysis module, it is made of gas circuit and infrared sensor, air path part is connect with collection terminal, the gas sampled for actively extracting each collector terminal, sensor is used to analyze the cost of gas, calculates the content of SF6 and oxygen and is sent to host by way of wireless transmission；Host, is the man-machine interface of whole system, the data for showing each collector, stores alert data, and linkage alarm sends out sound-light alarm when alarm.Relationship of the infrared light between the absorption characteristic and its concentration of SF6 gases, judges whether SF6 gas concentrations have occurred and that change, according to the whether exceeded carry out Realtime Alerts of SF6 gas concentrations when detecting counter the changing of SF6 gas concentrations in high-tension switch gear.
Description
Technical field
The utility model is related to a kind of electric power safety detecting systems, i.e. SF6 gases leakage monitoring and alarm system.It is suitable for
Electric system, the switch gear rooms SF6, the rooms GIS, SF6 main transformers etc. carry out the long-term on-line real time monitoring of SF6 gases.
Background technology
In the prior art, SF6 gases have obtained answering extensively in the power system with its excellent insulation and arc extinction performance
With almost become used in middle pressure, high pressure and ultra-high pressure switch unique insulate and arc-extinguishing medium.When use is with SF6 gas
Body is the SF6 gases leaked out and its decomposition when insulating to leak in use with the cubicle switch of arc-extinguishing medium
Object can be gathered toward indoor bottom space, cause ischaemia and with poison, and to staff's life for getting in, I goes to constitute tight
It threatens again.Current existing SF6 gas concentration measurements means are ultrasonic technology monitoring and the detection of high pressure negative corona discharge.Ultrasound
Wave technology monitoring is using ultrasonic wave transmission speed different in the gas of different molal weights, to the SF6 leaked in air
Gas is detected, but technology detection highly concentrated to SF6 is more accurate, not applicable to micro SF6 gas detections.High pressure
It is simple in structure, reliability is high, at low cost although negative corona discharge detection is the current mainstream technology for measuring SF6 gas concentrations,
It is that service life is short, rate of false alarm height is its fatal defects.Carry out the research of SF6 gases leakage monitoring and alarm system to water power
Factory is significant.
Utility model content
The purpose of this utility model is against the above deficiency and provides a kind of SF6 gases leakage monitoring and alarm system, can
With effectively realize monitoring in real time and to SF6 gases it is exceeded or anoxic is handled.
The technical solution of the utility model is：SF6 gases leakage monitoring and alarm system, it is characterised in that including：
Collector is the collection terminal of entire leakage monitoring, and multiple collection points are arranged, and is mainly used for collecting the SF6 gas of leakage
Body.
Analysis module is made of gas circuit and infrared sensor, and air path part is connect with collection terminal, each for actively extracting
The gas sampled of collector terminal, sensor are used to analyze the ingredient of gas, calculate the content of SF6 and oxygen and by wireless
The mode of transmission is sent to host.
Host, is the man-machine interface of whole system, and the data for showing each collector store alert data, alarm
Shi Liandong alarms send out sound-light alarm.
Infrared sensor is non-dispersion infrared technology NDIR sensors.
Infrared light is to the absorption characteristic of SF6 gases and its when detecting counter the changing of SF6 gas concentrations in high-tension switch gear
Relationship between concentration, judges whether SF6 gas concentrations have occurred and that change, real according to the whether exceeded progress of SF6 gas concentrations
Alarm.
It is a completely new SF6 gas leakage monitoring scheme using Infrared spectra adsorption technology, experiment proves this detection
System has basic feasibility, has larger advantage in monitoring real-time, reliability and applicability etc..
By to domestic and international all kinds of SF6 equipment leakages investigation and analysis, finding the position that SF6 equipment is also easy to produce leakage, determine
Emphasis monitors region, and the diffusion phenomena of SF6, determine optimal acquisition device monitoring scheme after research leakage.Infrared sensor is suitable for length
Phase stability monitoring.
Huge advantage possessed by Infrared spectra adsorption detection, is embodied in：
A. it is not interfered by tested gas, the gas concentration data received are true and reliable.
B. reaction speed is exceedingly fast, and effectively realizes monitoring in real time and to SF6 gases are exceeded or anoxic carries out preliminary treatment.
C. failure logging is easy to store, and can understand the characteristics such as faults intensity and fault type by image, to prediction
Fault progression, science decision provide foundation.
D. at low cost, easy popularization.
The utility model has the advantages that：1, it realizes effective in real time to the progress of high-tension switch gear inside SF6/O2 gas concentrations
Tracing detection.The feasibility of the equipment has larger advantage in monitoring real-time, reliability and applicability etc..2、
The monitoring of SF6/O2 gas concentrations can change the influence of extraneous gas from specific infrared spectrum, not by tested gas
Influence this characteristic start with.3, using Infrared spectra adsorption as the on-line monitoring system of detection means, have accurate and reliable, anti-
Should it is rapid, be easy to measure, be easy to record, it is highly practical the features such as.4, this product is passed using SF6 non-dispersion infrared line technologies NDIR
Sensor, solve because caused by the pollution of light source ages, sampling pool and detector surface drift, hand external action due to change etc. and to ask
Topic.5, develop reliable and practical on-line monitoring system, realize monitoring and controlling, alarm, data record, image generate and
The functions such as information remote transmitting have the characteristics that real-time is good, reliability is high, non-maintaining.
The embodiment of the utility model is described in further detail below in conjunction with attached drawing.
Description of the drawings
Fig. 1 is the utility model control block diagram.
Specific implementation mode
Referring to Fig. 1, SF6 gases leakage monitoring and alarm system, including：
Collector is the collection terminal of entire leakage monitoring, and multiple collection points are arranged, and is mainly used for collecting the SF6 gas of leakage
Body；
Analysis module is made of gas circuit and infrared sensor, and infrared sensor is non-dispersion infrared technology NDIR sensings
Device, air path part are connect with collection terminal, the gas sampled for actively extracting each collector terminal, and sensor is for analyzing gas
The ingredient of body calculates the content of SF6 and oxygen and is sent to host by way of wireless transmission；
Host, is the man-machine interface of whole system, and the data for showing each collector store alert data, alarm
Shi Liandong alarms send out sound-light alarm.
Basic function
（a）SF6 gas concentration detection functions.
System is detected each SF6 detection dot cycles in real time（Cycle detection interval time≤4 minute）, quantitative aobvious
Show the SF6 numerical value in each monitoring point air, transfinite and make alert process, starts sound-light alarm.
（b）Oxygen concentration detection function.
System is to each O2Detection dot cycle is detected in real time（Cycle detection interval time≤4 minute）, transfinite and make
Alert process starts sound-light alarm.
（c）The storage of host alarm logging, query function.
Host has the function of storing and inquire to alarm logging, can be looked into historgraphic data recording by host
It askes, data power down is not lost.
（d）485 bus communication modes realize remote monitoring.
Output interface is RS485, while can realize that RS-232 communication modes and host computer are online, and access third party is supported to set
Standby and software desk Implementation remote monitoring and alarm, have good expansion.
（e）User-centered interface operates.
Host screen uses 7 cun of LCD liquid crystal displays, is all made of hommization touching manipulation, interface is reasonable.And it is real
Existing end of operation is after 40 seconds, LCD backlight automatic closing function.
It catches sensor to be rationally arranged and uses double-beam measurement original with the important links such as receiving side signal formula, sensor
It manages, all the way measuring beam, all the way reference beam, compared with single beam, dual wavelength double-beam technique can be to avoid because of light source
It drifts about caused by aging, sampling pool and detector surface pollution.
Alarm setting：
In main interface, click " alarm setting button " enter alarm setting sub-interface, it can be arranged inside alarm setting
SF6, oxygen, the alarm threshold of temperature and humidity, such as SF6 alarm thresholds are set as 1000PPMV, i.e., when real time data SF6 is examined
Surveying alarm threshold 1000PPMV, SF6 once more than SF6 settings will alarm；The alarm threshold of oxygen may be configured as 18, then
Once oxygen content is less than 18%, oxygen will alarm, and temperature and humidity is voluntarily arranged.As shown in the figure.
SF6 gases leakage monitoring and advantage possessed by alarm system：
Reliability：
The wavelength of infrared laser, which is the monochromatic light for the specific wavelength that reference channel is modulated, to generate suction to tested gas
It receives, is hardly disturbed.Once external environment changes, you can determine in equipment that SF6 gas concentrations occur exceeded or scarce
Oxygen, this point are substantially better than hand-held detection.
Real-time：
Infrared laser absorption process can monitor that SF6 gas contents change in equipment within first time, and signal can reach
Millisecond.It is of great significance to finding the failure symptom of a trend, development of preventing accident in time, reducing loss.
Applicability：
As on-line monitoring system, need to be in continuous operation state for a long time, therefore operation stability and maintenance are
Particularly important consideration factor.Infrared laser absorbs monitoring currently relatively simply, and the element of use is few, and system substantially may be used
It realizes without maintenance.
The monitoring range of SF6 gases leakage monitoring and alarm system：
A) SF6 measurement ranges：0~2000ppm；
B) SF6 measurement accuracy：±4%FS；
C) range is arranged in SF6 gas leakage warnings point：0~1000 μ L/L are adjustable（Electric power standard 1000）；
D) oxygen detection concentration：0~25%；
E) oxygen measurement precision：<2%；
F) anoxic alarm point：0~25% adjustable (electric power standard 18%)；
G) warning output contactless power：AC220V/3A；
H) type of alarm：Acousto-optic；
I) communication interface：RS-485（MODBUS-RTU standard traffic stipulations）；
J) the data record time：2 years（Host computer mass memory）.
It is described above, only specific embodiment of the present utility model, various illustrations are not to the reality of the utility model
Matter Composition of contents limits.
Claims (2)
1.SF6 gases leakage monitoring and alarm system, it is characterised in that including：
Collector is the collection terminal of entire leakage monitoring, and multiple collection points are arranged, and is mainly used for collecting the SF6 gases of leakage；
Analysis module is made of gas circuit and infrared sensor, and air path part is connect with collection terminal, for actively extracting each acquisition
The gas sampled of device terminal, sensor are used to analyze the ingredient of gas, calculate the content of SF6 and oxygen and pass through wireless transmission
Mode be sent to host；
Host, is the man-machine interface of whole system, the data for showing each collector, stores alert data, and when alarm joins
Dynamic alarm sends out sound-light alarm.
2. SF6 gases leakage monitoring described in accordance with the claim 1 and alarm system, it is characterised in that infrared sensor is overstepping one's bounds
Dissipate infrared technology NDIR sensors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721749371.5U CN207650972U (en) | 2017-12-15 | 2017-12-15 | SF6 gases leakage monitoring and alarm system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721749371.5U CN207650972U (en) | 2017-12-15 | 2017-12-15 | SF6 gases leakage monitoring and alarm system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207650972U true CN207650972U (en) | 2018-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721749371.5U Active CN207650972U (en) | 2017-12-15 | 2017-12-15 | SF6 gases leakage monitoring and alarm system |
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| Country | Link |
|---|---|
| CN (1) | CN207650972U (en) |
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2017
- 2017-12-15 CN CN201721749371.5U patent/CN207650972U/en active Active
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