CN109507275A - The Mass Spectrometer Method system and method for insulating gas electric discharge decomposition product in GIS - Google Patents
The Mass Spectrometer Method system and method for insulating gas electric discharge decomposition product in GIS Download PDFInfo
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- CN109507275A CN109507275A CN201811329801.7A CN201811329801A CN109507275A CN 109507275 A CN109507275 A CN 109507275A CN 201811329801 A CN201811329801 A CN 201811329801A CN 109507275 A CN109507275 A CN 109507275A
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Abstract
The disclosure discloses a kind of Mass Spectrometer Method system of insulating gas electric discharge decomposition product in GIS, including discharging chamber, anion ionization source and mass spectrograph.The disclosure further discloses a kind of detection method of insulating gas electric discharge decomposition product in GIS.The disclosure does not need the constituent that insulating gas in GIS can be directly detected by other tools and technology.
Description
Technical field
The disclosure belongs to gas component detection field, and in particular to the matter of insulating gas electric discharge decomposition product in a kind of GIS
Compose detection system and method.
Background technique
Cubicle Gas-Insulated Switchgear GIS (Gas Insulated Switchgear) is by breaker, isolation
The main elements such as switch, earthing switch, bus, mutual inductor, arrester are packed into the metal shell of sealing, and are filled with insulating gas
As insulation and arc-extinguishing medium.Traditional GIS device is mainly with SF6As insulation and arc-extinguishing medium, and new environment-friendly type GIS is also
It uses and SF more6The close strong electronegativity gas of property is as insulation and arc-extinguishing medium.Since the gas medium in GIS device is held
Load insulation and the work of arc extinguishing, it is possible to be decomposed into electric discharge toxic, pernicious gas or for equipment insulation with it is arc-extinguishing
It can have an impact, therefore the decomposition situation that it is necessary to study it under the function of current.
At this stage, there are following several respects using the Mass Spectrometry detection method of common 70eV electron collision: (1) compared with
High electron energy can bombard under test gas molecule for small fragment, different component shortage specificity mirror similar for structure
Other ability, when group timesharing similar containing a large amount of chemical compositions, structure in tested gas, using the mass spectrum of traditional electron collision
Detection method can make situation become complex, generally require to assist in identifying and analyze gas by other tools and technology
Component；(2) it commonly uses in GIS device with SF6For representative electronegative gas as insulation and arc-extinguishing medium, bulk mass due to
With strong electronegativity, unstable excitation state often will form using traditional ionization mode and be difficult to be formed stable positively charged
Ionic group, bring difficulty to subsequent detection.
Summary of the invention
Against the above deficiency, the mass spectrum for being designed to provide insulating gas electric discharge decomposition product in a kind of GIS of the disclosure
Detection system and method, by the various discharge scenarios in Simulated GlS equipment, using negative ion electrospray to gas component to be measured into
Row ionization, the ion of different mass-to-charge ratioes is deflected and is detected under magnetic fields, be able to solve gas in existing GIS device
Different product chemistries compositions are close and be difficult to differentiate and the problem of by strong electronegativity bring cation unstability after decomposition.
The purpose of the disclosure is achieved through the following technical solutions.
The Mass Spectrometer Method system of insulating gas electric discharge decomposition product in a kind of GIS, comprising:
Discharging chamber, anion ionization source and mass spectrograph；
The discharging chamber is successively connected with the anion ionization source and the mass spectrograph by pipeline；Wherein,
The discharging chamber is for discharging to insulating gas, being decomposed；
Constituent after the anion ionization source is used to decompose insulating gas ionizes；
The mass spectrograph is used to detect the mass-to-charge ratio of each component in the plasma that constituent ionization generates.
Preferably, the discharging chamber includes cavity body, powers on pole bar, lower electrode stem；Wherein, described to power on outside pole bar
Side is surrounded by insulation sleeve, and upper rotatory sealing gland is located at the top of upper insulation sleeve, for seal upper insulation sleeve and power on pole bar it
Between gap, power on pole bar and protrude into one end of cavity body and be connected with static contact；It is surrounded by lower insulation sleeve on the outside of the lower electrode stem,
Lower rotation sealing gland is located at the bottom end of lower insulation sleeve, for sealing the gap between lower insulation sleeve and lower electrode stem, lower electrode
One end that bar protrudes into cavity body is connected with moving contact, and the moving contact passes through hand-operated lifting with the contact distance of the static contact
Sabot is controlled.
Preferably, the discharging chamber further includes observation window, and the observation window is set to the two sides of the cavity body.
Preferably, the material for preparing of the upper insulation sleeve and the lower insulation sleeve is thermosetting resin.
Preferably, the thermosetting resin is epoxy resin.
Preferably, the anion ionization source is electron spray vacuum ultraviolet light ionization source.
The disclosure also provides a kind of detection method of insulating gas electric discharge decomposition product in GIS, includes the following steps:
S100: Mass Spectrometer Method system is vacuumized, and the insulating gas of GIS device is used for discharging chamber injection；
S200: applying external voltage to discharging chamber decomposes insulating gas electric discharge；
S300: the constituent that insulating gas electric discharge is decomposed is passed through anion ionization source and is ionized；
S400: the plasma that constituent ionization generates is passed through mass spectrograph and carries out mass-to-charge ratio detection.
Preferably, the anion ionization source is electron spray vacuum ultraviolet light ionization source.
Compared with prior art, disclosure bring has the beneficial effect that
1, the fragment peak type and quantity formed in detection process greatly reduce, and do not need by other tools and technology just
It can identify the gas component in decomposition product.
2, the disclosure selection negative electricity from generate anion, it is more stable compared to cation, can be detected directly.
Detailed description of the invention
Fig. 1 is that the structure of the Mass Spectrometer Method system of insulating gas electric discharge decomposition product in a kind of GIS shown in the disclosure is shown
It is intended to；
Fig. 2 is the structural schematic diagram of the discharging chamber in Fig. 1；
Fig. 3 is the Mass Spectrometry detection method flow chart of insulating gas electric discharge decomposition product in a kind of GIS shown in the disclosure；
Fig. 4 is to detect SF using existing method6Obtained mass spectrogram；
Fig. 5 is the method detection SF using Fig. 36Obtained mass spectrogram.
Specific embodiment
The technical solution of the disclosure is described in detail with reference to the accompanying drawings and examples.
Referring to Fig. 1, the Mass Spectrometer Method system of insulating gas electric discharge decomposition product in a kind of GIS, comprising: discharging chamber, negative
Ion ionization source and mass spectrograph；
The discharging chamber is successively connected with the anion ionization source and the mass spectrograph by pipeline；Wherein,
The discharging chamber is for discharging to insulating gas, being decomposed；
Constituent after the anion ionization source is used to decompose insulating gas ionizes；
The mass spectrograph is used to detect the mass-to-charge ratio of each component in the plasma that constituent ionization generates.
Above-described embodiment constitutes the complete technical solution of the disclosure, by carrying out to insulating gas to be measured electric discharge decomposition product
Negative ion electrospray is from anion is formed, and anion, which enters, to be accelerated under electric field action after mass spectrograph and deflect under magnetic fields, no
With mass-to-charge ratio anion separated after directly detect the component of insulating gas.
In another embodiment, referring to fig. 2, the discharging chamber includes cavity body, powers on pole bar 1, lower electrode stem 8；
Wherein, described power on is surrounded by insulation sleeve 3 on the outside of pole bar 1, and upper rotatory sealing gland 2 is located at the top of upper insulation sleeve 3, for close
It seals up insulation sleeve 3 and powers on the gap between pole bar 1, power on pole bar 1 and protrude into one end of cavity body and be connected with static contact 4-1；
Lower insulation sleeve 6 is surrounded by the outside of the lower electrode stem 8, lower rotation sealing gland 7 is located at the bottom end of lower insulation sleeve 6, under sealing
Gap between insulation sleeve 6 and lower electrode stem 8, one end that lower electrode stem 8 protrudes into cavity body is connected with moving contact 4-2, described
The moving contact distance of the contact with the static contact is controlled by hand-operated lifting sabot 9.
In the present embodiment, experimental power supply is provided by the corona free testing transformer of 0~50kV adjustable voltage, and two poles are logical
After overprotection resistance with discharging chamber power on pole bar 1 and lower electrode stem 8 is connected, and voltage is added in cavity via two electrode stems
Between internal moving contact 4-2, static contact 4-1, the voltage between moving contact 4-2 and static contact 4-1 is more than cavity interior insulation gas
Breakdown voltage after, breakdown insulating gas forms electric arc, and the intracorporal insulating gas of chamber starts to decompose under arcing.
In another embodiment, the discharging chamber further includes observation window 5, and the observation window 5 is set to the cavity sheet
The two sides of body.
In the present embodiment, by the way that the observation window 5 of discharging chamber two sides is arranged in, convenient for the discharge scenario to inside cavity into
Row observation.
In another embodiment, the material for preparing of the upper insulation sleeve 3 and the lower insulation sleeve 6 is thermosetting resin.
In the present embodiment, thermosetting resin has excellent electrical insulation capability, including phenolic resin, Lauxite, trimerization
Cyanogen amine-formaldehyde resin, epoxy resin, unsaturated-resin, polyurethane, polyimides etc., the present embodiment preferably uses epoxy resin.
In another embodiment, the anion ionization source is electron spray vacuum ultraviolet light ionization source.
In the present embodiment, insulating gas decomposition product is introduced into high vacuum ionization chamber using electron spray, decomposition product is in ionized region
Domain is by the vacuum ultraviolet ionized of wavelengthtunable, and since decomposition product is commonly polyfluoride, electronegativity is stronger, is captured by electronics
Mode will directly generate anion.
In another embodiment, referring to Fig. 3, the disclosure also provides a kind of inspection of insulating gas electric discharge decomposition product in GIS
Survey method, includes the following steps:
S100: Mass Spectrometer Method system is vacuumized, and the insulating gas of GIS device is used for discharging chamber injection；
S200: applying external voltage to discharging chamber decomposes insulating gas electric discharge；
S300: the constituent that insulating gas electric discharge is decomposed is passed through anion ionization source and is ionized；
S400: the plasma that constituent ionization generates is passed through mass spectrograph and carries out mass-to-charge ratio detection.
In another embodiment, the anion ionization source is electron spray vacuum ultraviolet light ionization source.
Fig. 4 is to detect SF using existing method6Obtained mass spectrogram.Tested gas is pure SF6Gas, using conventional mass spectrum
Method is detected.In the detection process, due to electron impact ionization, SF6Molecule is ionized as SF+、SF2 +、SF3 +、SF4 +And
SF5 +Etc. a variety of cations, occur a large amount of fragment peaks on mass spectrogram, at this time not by other means, it is difficult to differentiate tested gas
Composition is pure SF on earth6Gas or a variety of SFxThe mixed gas of gas；Simultaneously as SF6 +Point that be unstable, should occurring
Daughter ion peak SF6 +Do not occur, even more brings difficulty for detection work.
Fig. 5 is the detection method detection SF using disclosure design6Obtained mass spectrogram.Tested gas is pure SF6Gas,
The fragment peak occurred on spectrogram at this time only has SF5 -One kind, and conventional scheme then produces six kinds of fragment peaks；This programme is used simultaneously
Directly occur corresponding to SF to be measured on obtained spectrogram6The SF of gas6 -Peak, and do not occur in the mass spectrogram of conventional scheme
SF6 +Peak.
It is compared by Fig. 4 and Fig. 5, it can be seen that when detecting the strong electronegativity gas in GIS, examined compared to conventional mass spectrum
Survey method, the fragment type and quantity generated when being detected using this programme is less, while also avoiding point of polyfluoride
Daughter ion is unstable and is difficult to the problem of directly detecting, and provides huge convenience for subsequent gas component qualitative analysis.Cause
This, this programme is method that is a kind of simple and being effectively used for strong electronegativity gaseous matter in detection and analysis GIS.
The foregoing is merely the preferred embodiment of the disclosure, it cannot be understood as the limitation to disclosure range,
It should be pointed out that those skilled in the art, under the premise of not departing from disclosure design, can also make several
Modification and improvement, these belong to the protection scope of the disclosure.
Claims (8)
1. the Mass Spectrometer Method system of insulating gas electric discharge decomposition product in a kind of GIS, comprising: discharging chamber, anion ionization source
And mass spectrograph；
The discharging chamber is successively connected with the anion ionization source and the mass spectrograph by pipeline；Wherein,
The discharging chamber is for discharging to insulating gas, being decomposed；
Constituent after the anion ionization source is used to decompose insulating gas ionizes；
The mass spectrograph is used to detect the mass-to-charge ratio of each component in the plasma that constituent ionization generates.
2. Mass Spectrometer Method system according to claim 1, which is characterized in that preferred, the discharging chamber includes cavity
Ontology powers on pole bar, lower electrode stem；Wherein, described power on is surrounded by insulation sleeve on the outside of pole bar, and upper rotatory sealing gland is located at upper
The top of insulation sleeve powers on one end that pole bar protrudes into cavity body for sealing upper insulation sleeve and powering on the gap between pole bar
It is connected with static contact；Lower insulation sleeve is surrounded by the outside of the lower electrode stem, lower rotation sealing gland is located at the bottom end of lower insulation sleeve, uses
In sealing lower gap between insulation sleeve and lower electrode stem, one end that lower electrode stem protrudes into cavity body is connected with moving contact, institute
Moving contact contact with static contact distance is stated to be controlled by hand-operated lifting sabot.
3. Mass Spectrometer Method system according to claim 2, which is characterized in that the discharging chamber further includes observation window, institute
State the two sides that observation window is set to the cavity body.
4. Mass Spectrometer Method system according to claim 2, which is characterized in that the upper insulation sleeve and the lower insulation sleeve
Preparing material is thermosetting resin.
5. Mass Spectrometer Method system according to claim 4, which is characterized in that the thermosetting resin is epoxy resin.
6. Mass Spectrometer Method system according to claim 1, which is characterized in that the anion ionization source is electron spray vacuum
Ultraviolet light ionization source.
7. a kind of Mass Spectrometer Method system according to claim 1 detects insulating gas electric discharge decomposition product in GIS
Method, include the following steps:
S100: Mass Spectrometer Method system is vacuumized, and the insulating gas of GIS device is used for discharging chamber injection；
S200: applying external voltage to discharging chamber decomposes insulating gas electric discharge；
S300: the constituent that insulating gas electric discharge is decomposed is passed through anion ionization source and is ionized；
S400: the plasma that constituent ionization generates is passed through mass spectrograph and carries out mass-to-charge ratio detection.
8. the method according to the description of claim 7 is characterized in that the anion ionization source is electron spray vacuum ultraviolet photoelectricity
From source.
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