CN101915821A - Check method and system of SF6 gas catabolite detecting instrument - Google Patents

Check method and system of SF6 gas catabolite detecting instrument Download PDF

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CN101915821A
CN101915821A CN2010102251345A CN201010225134A CN101915821A CN 101915821 A CN101915821 A CN 101915821A CN 2010102251345 A CN2010102251345 A CN 2010102251345A CN 201010225134 A CN201010225134 A CN 201010225134A CN 101915821 A CN101915821 A CN 101915821A
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detecting instrument
gas
instrument
concentration
described detecting
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CN101915821B (en
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颜湘莲
季严松
王承玉
杨韧
胡树国
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National Institute of Metrology
Electric Power Research Institute of State Grid Shanxi Electric Power Co Ltd
China Electric Power Research Institute Co Ltd CEPRI
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National Institute of Metrology
Electric Power Research Institute of State Grid Shanxi Electric Power Co Ltd
China Electric Power Research Institute Co Ltd CEPRI
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Abstract

The invention discloses a check method and a system of an SF6 gas catabolite detecting instrument, wherein the method comprises the following steps of measuring concentration of gas standard substances using SF6 as a diluent gas by using the SF6 gas catabolite detecting instrument; computing multiple performance indexes of the detecting instrument according to the measured concentration; comparing the computed multiple performance indexes of the detecting instrument with the performance indexes of instruments, required by detecting procedures; if all the computed multiple performance indexes of the detecting instrument are in accordance with the performance indexes of instruments, required by detecting procedures, determining that the detecting instrument can be used for on-site detection; otherwise, determining that the detecting instrument cannot be used for on-site detection. The invention can effectively check each performance index of the SF6 gas catabolite detecting instrument, can really reflect actual operation condition of SF6 opening and closing equipment, and provides basis and guidance for evaluation and overhaul of equipment states.

Description

SF 6The method of calibration of gas decomposition product detecting instrument and system
Technical field
The present invention relates to SF in the switchgear 6The detection of gas decomposition product more specifically, relates to a kind of SF 6The method of calibration of gas decomposition product detecting instrument and system.
Background technology
Sulfur hexafluoride (SF 6) gas has good insulation and arc extinction performance, be widely used in gas insulated combined electrical equipment (Gas Insulation Switchgear, GIS) and SF 6In the switchgears such as gas insulation breaker.(electric pressure 〉=110kV) mainly adopts SF to China's power transmission network 6Gas-insulated switchgear, along with the construction of State Grid Corporation of China's extra-high voltage grid, the switchgear of extra-high-voltage alternating current experiment and demonstration engineering all adopts SF 6(Hybrid GIS, HGIS), and the demand of equipment is just in cumulative year after year for gas-insulated metal-enclosed GIS or a kind of novel high-pressure switchgear between GIS and AIS.SF 6Switchgear is in vital position in power transmission network, visible equipment running status plays decisive role to the safe operation of electrical network.
At present, SF 6The main monitoring measure of switchgear has: current characteristics monitoring, the monitoring of breaker mechanism acting characteristic and the analysis and the SF of divide-shut brake coil 6Gas density monitoring etc., these technology can be analyzed the external status of switchgear effectively, but the diagnosis of switching devices internal state still lacks effective means and deep research.
Studies show that in a large number, detect the SF of equipment in service 6Gas decomposition product is the important method of diagnosis and assessment switchgear internal state.For insulator arrangement inside and along the latency Fault Diagnosis such as unusual ablation of parts in the abnormal heating of the connection defective between planar defect, device interior conductor, device interior, the arc-chutes, and after the inner accident of GIS aspect such as failure location, detect SF 6The gas decomposition product method has advantages such as antijamming capability is strong, highly sensitive, accuracy is good, is necessary SF in the regular switching devices thus 6Gas decomposition product detects and analyzes, and the running status of monitoring switchgear inside is for the state estimation and the repair based on condition of component of equipment provides guiding suggestion.
Operating switchgear is carried out SF 6The detection of gas decomposition product, existing method mainly contains vapor-phase chromatography, chromatograph-mass spectrometer coupling method, ion chromatography method, infrared absorption spectroscopy, detector tube method, chemical analysis, sensor, method etc., and detection principle, technical conditions and the scope of application of different detection methods are different.At SF 6Under the guidance of gas decomposition product detection method, scientific research institution and instrument production firm have developed various detecting instruments both at home and abroad, as portable gas chromatograph, SF 6Decomposition product detector, SF 6Electrical equipment malfunction detector, gas detection pipe unit etc.Because these detecting instruments are respectively at different gas decomposition products, the measuring accuracy of instrument, range, service condition etc. have nothing in common with each other, and make testing result exist than big-difference.Owing to lack unified detection platform, be difficult to existing SF 6The gas decomposition product detecting instrument is compared and is calibrated, and has a strong impact on SF 6The scene of gas decomposition product is detected, and has hindered the repair based on condition of component process of switchgear.
Summary of the invention
The technical matters that the present invention will solve provides a kind of SF 6The method of calibration of gas decomposition product detecting instrument can be to existing SF 6The gas decomposition product detecting instrument is compared and is calibrated, to be used for on-the-spot the detection effectively.
The invention provides a kind of SF 6The method of calibration of gas decomposition product detecting instrument comprises SF 6The gas decomposition product detecting instrument is measured with SF 6Concentration for the gas standard material of diluents; Calculate the multinomial performance index of detecting instrument according to the concentration of measuring; With the multinomial performance index of the detecting instrument that calculates with detect the instrument performance index that rules require and compare; Detect the instrument performance index that rules require if the multinomial performance index of the detecting instrument that calculates all satisfies, determine that then detecting instrument can be used in on-the-spot the detection, otherwise, determine that detecting instrument can not be used for on-the-spot the detection.
According to an embodiment of the inventive method, this method also comprises: utilize the gravimetric method preparation with SF 6Multiple gases standard substance for the variable concentrations of diluents.
According to another embodiment of the inventive method, the multinomial performance index of detecting instrument comprises the accuracy of measurement, the cross interference degree of gas with various component, the repeatability of measurement and the linearity of instrument.
Another embodiment according to the inventive method, the step of calculating the multinomial performance index of detecting instrument according to the concentration measured comprises: after the gas standard material with definite component of variable concentrations feeds detecting instrument, calculate the error of indication of detecting instrument according to the concentration known of the gas standard material of the concentration indicating value that reads and definite component at every turn; After the gas standard material with definite component of variable concentrations feeds detecting instrument, according to the detecting instrument that reads at every turn the concentration known of the gas standard material of the concentration indicating value of other gas compositions and definite component is calculated the gas standard material of determining component cross interference degree to other gas compositions, wherein, other gas compositions are gas compositions that the detecting instrument except that determining component can detect; After the gas standard material with definite component of the definite concentration in the detecting instrument range ability repeatedly feeds detecting instrument, calculate the repeatability of measuring according to the concentration indicating value of the detecting instrument that reads and the arithmetic mean value of a plurality of concentration indicating values at every turn; After the gas standard material with definite component of variable concentrations feeds detecting instrument, according to the linearity of the concentration known computing equipment of the gas standard material of the concentration indicating value of the detecting instrument that reads and definite component at every turn.
The method of calibration of detecting instrument of the present invention, verification SF effectively 6Every performance index of gas decomposition product detecting instrument can reflect SF truly 6The actual operating state of switchgear is for the assessment of equipment state and the maintenance of state provide foundation and guidance.
Another technical matters that the present invention will solve provides a kind of SF 6The check system of gas decomposition product detecting instrument can be to existing SF 6The gas decomposition product detecting instrument is compared and is calibrated, to be used for on-the-spot the detection effectively.
The invention provides a kind of SF 6The check system of gas decomposition product detecting instrument comprises detecting instrument, is used for measuring with SF 6Concentration for the gas standard material of carrier gas; The performance Index Calculation device links to each other with detecting instrument, and the concentration that is used for measuring according to detecting instrument is calculated the multinomial performance index of detecting instrument; Comparison means links to each other with the performance Index Calculation device, the multinomial performance index that is used for the detecting instrument that will calculate with detect the instrument performance index that rules require and compare; Performance is determined device, link to each other with comparison means, be used for all satisfying under the situation that detects the instrument performance index that rules require and determine that detecting instrument can be used in on-the-spot the detection, and do not satisfy under the situation that detects the instrument performance index that rules require in the multinomial performance index of the detecting instrument that calculates and to determine that detecting instrument can not be used for on-the-spot the detection in the multinomial performance index of the detecting instrument that calculates.
An embodiment of system according to the invention, this system also comprises preparation facilities, links to each other with detecting instrument, is used to utilize the gravimetric method preparation with SF 6Multiple gases standard substance for the variable concentrations of diluents.
Another embodiment of system according to the invention, the multinomial performance index of detecting instrument comprises the accuracy of measurement, the cross interference degree of gas with various component, the repeatability of measurement and the linearity of instrument.
The another embodiment of system according to the invention, the performance Index Calculation device comprises: error of indication determination module, after the gas standard material with definite component of variable concentrations feeds detecting instrument, be used for calculating the error of indication of detecting instrument according to the concentration known of the gas standard material of the concentration indicating value that reads and definite component at every turn; The cross interference determination module, after the gas standard material with definite component of variable concentrations feeds detecting instrument, be used for the concentration known of the gas standard material of the concentration indicating value of other gas compositions and definite component being calculated the gas standard material of determining component cross interference degree to other gas compositions according to the detecting instrument that reads at every turn, wherein, other gas compositions are gas compositions that the detecting instrument except that determining component can detect; The repeatability determination module, after the gas standard material with definite component of the definite concentration in the detecting instrument range ability repeatedly feeds detecting instrument, be used for calculating the repeatability of measuring according to the concentration indicating value of the detecting instrument that reads and the arithmetic mean value of a plurality of concentration indicating values at every turn; Linearity determination module after the gas standard material with definite component of variable concentrations feeds detecting instrument, is used for the linearity according to the concentration known computing equipment of the gas standard material of the concentration indicating value of the detecting instrument that reads and definite component at every turn.
The check system of detecting instrument of the present invention, verification SF effectively 6Every performance index of gas decomposition product detecting instrument can reflect SF truly 6The actual operating state of switchgear is for the assessment of equipment state and the maintenance of state provide foundation and guidance.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part.In the accompanying drawings:
Fig. 1 is the schematic flow sheet of an embodiment of method of calibration of the present invention.
Fig. 2 a is the detected SO of detecting instrument 2The linearity curve of gas composition.
Fig. 2 b is the detected H of detecting instrument 2The linearity curve of S gas composition.
Fig. 3 is the structural representation of an embodiment of check system of the present invention.
Fig. 4 is the structural representation of another embodiment of check system of the present invention.
Fig. 5 is the structural representation of the another embodiment of check system of the present invention.
Embodiment
With reference to the accompanying drawings the present invention is described more fully, exemplary embodiment of the present invention wherein is described.Exemplary embodiment of the present invention and explanation thereof are used to explain the present invention, but do not constitute improper qualification of the present invention.
In the prior art, owing to lack unified detection platform, be difficult to existing SF 6The gas decomposition product detecting instrument is compared and is calibrated, and has had a strong impact on SF 6The scene of gas decomposition product is detected, and has hindered the repair based on condition of component process of switchgear.For this reason, press for SF 6The method of calibration of gas decomposition product detecting instrument is studied, and with reliability and the validity of guaranteeing testing result, thereby instructs and carry out the SF of switchgear 6The testing of gas decomposition product.
The purpose of this invention is to provide a kind of SF 6The method of calibration of gas decomposition product detecting instrument and system are to SF 6The gas decomposition product detecting instrument is calibrated and is compared, specification switch equipment SF 6Gas decomposition product in-situs tester device, unified detection platform is to guarantee SF 6The accuracy of the indicating value that decomposition product detects.
Fig. 1 is the schematic flow sheet of an embodiment of method of calibration of the present invention.
As shown in Figure 1, this embodiment may further comprise the steps:
S102, SF 6The gas decomposition product detecting instrument is measured with SF 6Be the concentration of the gas standard material of diluents, for example, this gas standard material can be SO 2/ SF 6Or H 2S/SF 6
S104, according to the multinomial performance index of the concentration calculating detecting instrument of measuring, for example, the multinomial performance index can comprise the accuracy of measurement, the cross interference degree of gas with various component, the repeatability of measurement and the linearity of instrument, wherein, selects for use with SF 6For the standard substance verification of diluents is used for detector switch equipment SF 6The instrument of gas decomposition product is that the standard substance of diluents comes the method for tester to compare with adopting with nitrogen or helium, more meets the insulation status of switchgear inside, has truly reflected the actual state of equipment running status;
S106, with the multinomial performance index of the detecting instrument that calculates with detect the instrument performance index that rules require and compare;
S108, if all satisfying, the multinomial performance index that calculates detects the instrument performance index that rules require, determine that then detecting instrument can be used in on-the-spot the detection, otherwise, determine that detecting instrument can not be used for on-the-spot the detection, promptly, if all properties index is all qualified, judge that then detecting instrument can be used in on-the-spot the detection,, judge that then detecting instrument can not on-the-spotly use if exist a certain individual event or multinomial performance index defective.
This embodiment is verification SF effectively 6Every performance index of gas decomposition product detecting instrument can reflect SF truly 6The actual operating state of switchgear is for the assessment of equipment state and the maintenance of state provide foundation and guidance.
In another embodiment of the inventive method, before the multinomial performance index of measuring and testing instrument, can also utilize the gravimetric method preparation with SF 6Multiple gases standard substance for the variable concentrations of diluents.For example, can be according to SF 6The gas composition that the gas decomposition product detecting instrument can be measured (for example, SO 2Gas composition and H 2The S gas composition) and measurement range, select for use with SF 6Be the standard substance of diluents, the concentration of standard substance is not more than the range of gas composition that instrument is surveyed, and adopts gravimetric method to prepare the gas standard material of variable concentrations.
In the another embodiment of the inventive method, the step of calculating the multinomial performance index of detecting instrument according to the concentration of measuring comprises:
(1) after the gas standard material with definite component of variable concentrations feeds detecting instrument, calculates the error of indication of detecting instrument according to the concentration known of the gas standard material of the concentration indicating value that reads and definite component at every turn.
Particularly, in the measurement range of detecting instrument, according to from low to high order with variable concentrations, determine that the gas standard material of composition feeds detecting instrument, after instrument indicating value to be detected is stable, the indicating value C of register instrument iFor same concentration, can repeated test 3 times, the error of indication of computing equipment.
Wherein, the absolute error E of the indicating value of instrument and gas standard material concentration iCalculation expression be:
E i＝|C j-C s| (1)
In formula (1), C jBe instrument indicating value C iArithmetic mean, C sConcentration known for calibrating gas.
Wherein, the relative error E of instrument indicating value and gas standard material concentration RiCalculation expression be:
E ri = | C j - C s | R × 100 % - - - ( 2 )
In formula (2), R is the range of this gas composition of apparatus measures.
For every kind of gas composition, choose maximum E iOr E RiThe error of indication as instrument.
Below by an instantiation, express the measuring process of value error:
Utilize the SF of this embodiment to certain manufacturers produce 6The gas decomposition product detecting instrument is tested, and this instrument is used to detect switchgear SF in service 6The SO of gas decomposition product 2And H 2The S gas composition, instrument detecting SO 2Measurement range R be 0～100 μ L/L, detect H 2The measurement range R of S is 0～200 μ L/L.Can select for use the concentration that provides by China National Measuring Science Research Inst. to be the SO of 90 μ L/L 2/ SF 6And H 2S/SF 6The gas standard material obtains corresponding standard substance (that is SO, that concentration is 2,5,15,30,50 μ L/L respectively by the method for diluting 2/ SF 6Gas standard material and H 2S/SF 6The gas standard material).
SO with variable concentrations 2/ SF 6And H 2S/SF 6The gas standard material feeds detected instrument according to order from low to high, register instrument indicating value, repeated test 3 times, the mean value C of computing equipment indicating value jAnd relative error E Ri, the check results of this tester measuring accuracy is shown in following table 1.Test result shows, tested instrument detecting SO 2The error of indication of gas composition is 3.34%, detects H 2The error of indication of S gas composition is 2.66%.
Figure BSA00000187598900071
The check results of table 1 tester measuring accuracy
(2) after the gas standard material with definite component of variable concentrations feeds detecting instrument, according to the detecting instrument that reads at every turn the concentration known of the gas standard material of the concentration indicating value of other gas compositions and definite component is calculated the gas standard material of determining component cross interference degree to other gas compositions, wherein, other gas compositions are gas compositions that the detecting instrument except that determining component can detect.
Particularly, detecting instrument can feed instrument by the gas standard material with a certain one-component to the cross interference degree of gas with various component, register instrument to other gas compositions (for example, if instrument can be used for detected gas decomposition product SO 2And H 2S, and that the feeding instrument is SO 2/ SF 6The gas standard material, then other gas compositions are meant H 2The S gas composition) indicating value C d, calculate tested gas composition (for example, SO 2) to other gas compositions (for example, H 2S) annoyance level E dExpression formula be:
E d = C d C s × 100 % - - - ( 3 )
Below by an instantiation measuring process of cross interference degree is described:
SO with variable concentrations 2/ SF 6And H 2S/SF 6The gas standard material feeds respectively by test examination instrument, and register instrument detects H respectively 2S and SO 2The indicating value C of gas composition d, computing equipment is at H 2S and SO 2Annoyance level E between gas composition dTesting result shown in following table 2, tested instrument detecting SO 2Gas composition is to H 2The annoyance level that the S gas composition detects is 2%, detects H 2The S gas composition is to SO 2Gas composition does not detect and disturbs.
Figure BSA00000187598900082
The cross interference check results of table 2 instrument between gas composition
Because SF 6There is the cross interference phenomenon in the gas decomposition product detecting instrument between the gas with various composition, instrument may be subjected to the influence of other gas componants to the indicating value of survey gas componant, so the annoyance level by tester can be eliminated the on-the-spot SF of detection effectively 6Interference between each gas componant of gas decomposition product.
(3) after the gas standard material with definite component of the definite concentration in the detecting instrument range ability repeatedly feeds detecting instrument, calculate the repeatability of measuring according to the concentration indicating value of the detecting instrument that reads and the arithmetic mean value of a plurality of concentration indicating values at every turn.
Particularly, select the gas standard material of the suitable instrument range of concentration, in the short period interval, the result's that testing instruments are measured continuously consistent degree.The gas standard material of certain concentration in the measurement range of gas composition that instrument is surveyed is fed instrument, register instrument indicating value.In 3 minutes, repeatedly duplicate measurements, register instrument indicating value C respectively iWith relative standard deviation C rThe repeatability of expression instrument is measured number of times and is not less than 6, and calculation expression is:
C r = Σ i = 1 n ( C i - C j ) 2 n - 1 C j × 100 % - - - ( 4 )
In formula (4), n is for measuring number of times.
With an instantiation process that detects the repeatability of measuring is described below:
With concentration is the SO of 15 μ L/L 2/ SF 6Gas standard material and concentration are the H of 5 μ L/L 2S/SF 6The gas standard material feeds by test examination instrument, in the short time interval, and duplicate measurements 6 times, the instrument indicating value C of the each test of record i, calculate the repeated C of instrument rShown in following table 3, by school instrument detecting SO 2The repeated relative standard deviation of gas composition is 1.22%, detects H 2The repeated relative standard deviation of S gas composition is 1.79%.
Figure BSA00000187598900092
The check results of table 3 Instrument measuring repeatability
The result who carries out parallel experiment and computational analysis from above-mentioned repeatability to apparatus measures as seen, the repeatability of measurement has been investigated the stability of instrument, it is excessive to avoid in measuring process the instrument indicating value to change, and has guaranteed the accuracy of testing result.
(4) after the gas standard material with definite component of variable concentrations feeds detecting instrument, according to the linearity of the concentration known computing equipment of the gas standard material of the concentration indicating value of the detecting instrument that reads and definite component at every turn.
Particularly, the linearity is meant the output of detecting instrument in the measurement range of survey gas composition and the degree of correlation of the linear relationship of input.Choose the gas standard material of gas composition that instrument is surveyed, according to from low to high order with variable concentrations C sThe gas standard material feed instrument, treat that the instrument indicating value is stable after, register instrument indicating value C iTo every kind of gas composition that instrument is surveyed, choose 5 concentration point and carry out linearity test, the linearly dependent coefficient r of computing equipment, its expression formula is:
r = Σ C i C s - Σ C i Σ C s n Σ C i 2 - ( Σ C i ) 2 n Σ C s 2 - ( Σ C s ) 2 n - - - ( 5 )
Below by an instantiation measuring process of the linearity of instrument is described:
With concentration is the SO of 2,5,15,30,50,90 μ L/L 2/ SF 6And H 2S/SF 6The gas standard material is imported successively by test examination instrument, register instrument indicating value, the linearly dependent coefficient that computing equipment is measured.By the test result of test examination instrument shown in following table 4, detected SO 2The linearity of gas composition shown in Fig. 2 a, detected H 2The linearity of S gas composition is shown in Fig. 2 b.
Figure BSA00000187598900102
The test result of the table 4 instrument linearity
The instrument linearity test result that provides by Fig. 2 a and Fig. 2 b as can be known, by school instrument detecting SO 2, H 2The linearly dependent coefficient of S gas composition is respectively 0.9997 and 0.9994, and as seen, instrument all has the better linearity relation in the measurement range of survey gas composition.
The linearity of instrument has provided the linear relationship of instrument in the measurement range of survey gas composition on the whole, helps SF 6The scene of gas decomposition product is detected, and has guaranteed the reliability and the validity of testing result.
SF to switchgear in service 6When gas decomposition product carries out the scene detection, SF 6The technical manual of gas decomposition product detecting instrument (that is, detecting the instrument performance index that rules require) requires:
(1) in the measurement range of gas composition that instrument is surveyed, the error of indication of instrument is not more than 5%;
(2) instrument is not more than 5% to the annoyance level between the gas with various component;
(3) the repeated relative standard deviation of instrument is not more than 2%;
(4) linearity of instrument is not less than 0.99.
Statistics is by above-mentioned every test performance index of school instrument, with SF 6The scene of gas decomposition product detecting instrument is detected standard and is compared, shown in following table 5.
Figure BSA00000187598900111
Table 5 instrument test result detects standard relatively with on-the-spot
As seen, satisfied switchgear SF by test examination instrument 6Code requirement is detected at the scene of gas decomposition product, is specification product, can be used for switchgear SF in service 6The scene of gas decomposition product is detected.
This embodiment has added up every performance index of detecting instrument, and whether the performance index of having passed judgment on tested instrument have reached SF 6Requirement is detected at the scene of gas decomposition product, and then has unified SF 6The platform that gas decomposition product detects is for the state estimation and the repair based on condition of component of switchgear provides important basis.
Fig. 3 is the structural representation of an embodiment of check system of the present invention.
As shown in Figure 3, the check system among this embodiment comprises:
Detecting instrument 11 is used for measuring with SF 6Concentration for the gas standard material of diluents;
Performance Index Calculation device 12, link to each other with detecting instrument 11, the concentration that is used for measuring according to detecting instrument is calculated the multinomial performance index of detecting instrument, for example, the multinomial performance index of detecting instrument can comprise the accuracy of measurement, the cross interference degree of gas with various component, the repeatability of measurement and the linearity of instrument, wherein, select for use with SF 6For the standard substance verification of carrier gas is used for detector switch equipment SF 6The instrument of gas decomposition product is that the standard substance of diluents comes the method for tester to compare with adopting with nitrogen or helium, more meets the insulation status of switchgear inside, has truly reflected the actual state of equipment running status;
Comparison means 13 links to each other with performance Index Calculation device 12, the multinomial performance index that is used for the detecting instrument that will calculate with detect the instrument performance index that rules require and compare;
Performance is determined device 14, link to each other with comparison means 13, be used under the situation of the instrument performance index that all satisfied detection rules of the multinomial performance index of the detecting instrument that calculates require, determining that detecting instrument can be used in on-the-spot detection, and under the situation of the instrument performance index that the satisfied detection rules of the multinomial performance index of the detecting instrument that calculates require, determine that detecting instrument can not be used for on-the-spot detection, promptly, if all properties index is all qualified, judge that then detecting instrument can be used in on-the-spot the detection, if exist a certain individual event or multinomial performance index defective, judge that then detecting instrument can not on-the-spotly use.
This embodiment is verification SF effectively 6Every performance index of gas decomposition product detecting instrument can reflect SF truly 6The actual operating state of switchgear is for the assessment of equipment state and the maintenance of state provide foundation and guidance.
Fig. 4 is the structural representation of another embodiment of check system of the present invention.
As shown in Figure 4, compare with embodiment among Fig. 3, the check system of this embodiment also comprises preparation facilities 21, links to each other with detecting instrument 11, is used to utilize the gravimetric method preparation with SF 6Be the multiple gases standard substance of the variable concentrations of diluents, for example, can be according to SF 6The gas composition that the gas decomposition product detecting instrument can be measured (for example, SO 2Gas and H 2S gas) and measurement range, select for use with SF 6Be the standard substance of carrier gas, the concentration of standard substance is not more than the range of gas composition that instrument is surveyed, and adopts gravimetric method to prepare the gas standard material of variable concentrations.
Fig. 5 is the structural representation of the another embodiment of check system of the present invention.
As shown in Figure 5, compare with embodiment among Fig. 3, the performance Index Calculation device 31 among this embodiment comprises:
Error of indication determination module 311 after the gas standard material with definite component of variable concentrations feeds detecting instrument, is used for calculating according to the concentration known of the gas standard material of the concentration indicating value that reads and definite component at every turn the error of indication of detecting instrument; Particularly, in the measurement range of detecting instrument, according to from low to high order with variable concentrations, determine that the gas standard material of composition feeds detecting instrument, after instrument indicating value to be detected is stable, the indicating value C of register instrument i, for same concentration, can 3 errors of indication of repeated test with computing equipment, wherein, the absolute error E of the indicating value of instrument and gas standard material concentration iCalculation expression be formula (1), the relative error E of instrument indicating value and gas standard material concentration RiCalculation expression be formula (2), for every kind of gas composition, choose maximum E iOr E RiAs the error of indication of instrument, concrete measurement result can be referring to above-mentioned table 1;
Cross interference determination module 312, after the gas standard material with definite component of variable concentrations feeds detecting instrument, be used for the concentration known of the gas standard material of the concentration indicating value of other gas compositions and definite component being calculated the gas standard material of determining component cross interference degree to other gas compositions according to the detecting instrument that reads at every turn, wherein, other gas compositions are gas compositions that the detecting instrument except that determining component can detect; Particularly, detecting instrument can feed instrument by the gas standard material with a certain one-component to the cross interference degree of gas with various component, register instrument to other gas compositions (for example, if instrument can be used in detected gas decomposition product SO 2And H 2S, and that the feeding instrument is SO 2/ SF 6The gas standard material, then other gas compositions are meant H 2The S gas composition) indicating value C d, calculate tested gas composition (for example, SO 2) to other gas compositions (for example, H 2S) annoyance level E dExpression formula be formula (3), this module is by the annoyance level of tester, can eliminate the on-the-spot SF of detection effectively 6Interference between each gas componant of gas decomposition product;
Repeatability determination module 313, after the gas standard material with definite component of the definite concentration in the detecting instrument range ability repeatedly feeds detecting instrument, be used for calculating the repeatability of measuring according to the concentration indicating value of the detecting instrument that reads and the arithmetic mean value of a plurality of concentration indicating values at every turn; Particularly, the gas standard material of certain concentration in the measurement range of gas composition that instrument is surveyed can be fed instrument, register instrument indicating value.In 3 minutes, repeatedly duplicate measurements, register instrument indicating value C respectively i, with relative standard deviation C rThe repeatability of expression instrument is measured number of times and is not less than 6, and calculation expression is formula (4), and it is excessive that this module avoids in measuring process the instrument indicating value to change, and has guaranteed the accuracy of testing result;
Linearity determination module 314 after the gas standard material with definite component of variable concentrations feeds detecting instrument, is used for the linearity according to the concentration known computing equipment of the gas standard material of the concentration indicating value of the detecting instrument that reads and definite component at every turn; Particularly, the linearity is meant the output of tester in the measurement range of survey gas composition and the degree of correlation of the linear relationship of input, can choose the gas standard material of gas composition that instrument is surveyed, according to from low to high order with variable concentrations C sThe gas standard material feed instrument, treat that the instrument indicating value is stable after, register instrument indicating value C i, to every kind of gas composition that instrument is surveyed, choose 5 concentration point and carry out linearity test, the linearly dependent coefficient r of computing equipment, its expression formula is formula (5).This module has provided the linear relationship of instrument in the measurement range of survey gas composition on the whole, helps SF 6The scene of gas decomposition product is detected, and has guaranteed the reliability and the validity of testing result.
This embodiment has added up every performance index of detecting instrument, and whether the performance index of having passed judgment on tested instrument reach SF 6Requirement is detected at the scene of gas decomposition product, and then has unified SF 6The platform that gas decomposition product detects is for the state estimation and the repair based on condition of component of switchgear provides important basis.
Description of the invention provides for example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are conspicuous for the ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present invention and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiment that have various modifications that the present invention's design is suitable for special-purpose.

Claims (8)

1. SF 6The method of calibration of gas decomposition product detecting instrument is characterized in that, described method comprises:
SF 6The gas decomposition product detecting instrument is measured with SF 6Concentration for the gas standard material of diluents;
Calculate the multinomial performance index of described detecting instrument according to the concentration of measuring;
With the multinomial performance index of the described detecting instrument that calculates with detect the instrument performance index that rules require and compare;
If the multinomial performance index of the described detecting instrument that calculates all satisfies the instrument performance index that described detection rules require, determine that then described detecting instrument can be used in on-the-spot the detection, otherwise, determine that described detecting instrument can not be used for on-the-spot the detection.
2. according to the described method of claim 1, it is characterized in that described method also comprises:
Utilize the gravimetric method preparation with SF 6Multiple gases standard substance for the variable concentrations of diluents.
3. according to right instrument 1 described method, it is characterized in that the multinomial performance index of described detecting instrument comprises the accuracy of measurement, the cross interference degree of gas with various component, the repeatability of measurement and the linearity of instrument.
4. method according to claim 3 is characterized in that, the step that the concentration that described basis is measured is calculated the multinomial performance index of described detecting instrument comprises:
After the gas standard material with definite component of variable concentrations feeds described detecting instrument, calculate the error of indication of described detecting instrument according to the concentration known of the gas standard material of the concentration indicating value that reads and definite component at every turn;
After the gas standard material with definite component of variable concentrations feeds described detecting instrument, according to the described detecting instrument that reads at every turn the concentration known of the gas standard material of the concentration indicating value of other gas compositions and definite component is calculated the cross interference degree of the gas standard material of described definite component to other gas compositions, wherein, described other gas compositions are gas compositions that the described detecting instrument except that described definite component can detect;
After the gas standard material with definite component of the definite concentration in the described detecting instrument range ability repeatedly feeds described detecting instrument, calculate the repeatability of described measurement according to the concentration indicating value of the described detecting instrument that reads and the arithmetic mean value of a plurality of concentration indicating values at every turn;
After the gas standard material with definite component of variable concentrations feeds described detecting instrument, calculate the linearity of described instrument according to the concentration known of the gas standard material of the concentration indicating value of the described detecting instrument that reads and described definite component at every turn.
5. SF 6The check system of gas decomposition product detecting instrument is characterized in that, described system comprises:
Detecting instrument is used for measuring with SF 6Concentration for the gas standard material of diluents;
The performance Index Calculation device links to each other with described detecting instrument, is used for calculating according to the concentration that described detecting instrument is measured the multinomial performance index of described detecting instrument;
Comparison means links to each other with described performance Index Calculation device, the multinomial performance index that is used for the described detecting instrument that will calculate with detect the instrument performance index that rules require and compare;
Performance is determined device, link to each other with described comparison means, be used for determining that described detecting instrument can be used in on-the-spot the detection under the situation that multinomial performance index at the described detecting instrument that calculates all satisfies the instrument performance index that described detection rules require, and do not satisfy in the multinomial performance index of the described detecting instrument that calculates under the situation of the instrument performance index that described detection rules require and determine that described detecting instrument can not be used for on-the-spot the detection.
6. system according to claim 5 is characterized in that, described system also comprises:
Preparation facilities links to each other with described detecting instrument, is used to utilize the gravimetric method preparation with SF 6Multiple gases standard substance for the variable concentrations of diluents.
7. system according to claim 5 is characterized in that, the multinomial performance index of described detecting instrument comprises the accuracy of measurement, the cross interference degree of gas with various component, the repeatability of measurement and the linearity of instrument.
8. system according to claim 7 is characterized in that, described performance Index Calculation device comprises:
Error of indication determination module, after the gas standard material with definite component of variable concentrations feeds described detecting instrument, be used for calculating the error of indication of described detecting instrument according to the concentration known of the gas standard material of the concentration indicating value that reads and definite component at every turn;
The cross interference determination module, after the gas standard material with definite component of variable concentrations feeds described detecting instrument, be used for the concentration known of the gas standard material of the concentration indicating value of other gas compositions and definite component being calculated the cross interference degree of the gas standard material of described definite component to other gas compositions according to the described detecting instrument that reads at every turn, wherein, described other gas compositions are gas compositions that the described detecting instrument except that described definite component can detect;
The repeatability determination module, after the gas standard material with definite component of the definite concentration in the described detecting instrument range ability repeatedly feeds described detecting instrument, be used for calculating the repeatability of described measurement according to the concentration indicating value of the described detecting instrument that reads and the arithmetic mean value of a plurality of concentration indicating values at every turn;
Linearity determination module, after the gas standard material with definite component of variable concentrations feeds described detecting instrument, be used for calculating the linearity of described instrument according to the concentration known of the gas standard material of the concentration indicating value of the described detecting instrument that reads and described definite component at every turn.
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CN102520121A (en) * 2011-12-08 2012-06-27 中国电力科学研究院 Environment-friendly type real-time detection apparatus for analysis of components in sulfur hexafluoride gas and method used therein
CN102520121B (en) * 2011-12-08 2015-06-24 中国电力科学研究院 Environment-friendly type real-time detection apparatus for analysis of components in sulfur hexafluoride gas and method used therein
CN102944645A (en) * 2012-10-26 2013-02-27 中国电力科学研究院 SF6 online monitoring apparatus accuracy detection system and method thereof
CN105242182A (en) * 2015-10-27 2016-01-13 中国电力科学研究院 Operation switch device internal defect determination method based on SF gas decomposition products
CN105242182B (en) * 2015-10-27 2019-03-15 中国电力科学研究院 Based on SF6The run switch equipment internal flaw judgment method of gas decomposition product
CN106596871A (en) * 2017-03-02 2017-04-26 中国家用电器研究院 Method and device for detecting performance reliability of air quality monitor
CN108254497A (en) * 2017-12-22 2018-07-06 河南省日立信股份有限公司 The gas-monitoring meter locale method of calibration of cell phone application control
CN108982190A (en) * 2018-09-21 2018-12-11 国网重庆市电力公司电力科学研究院 A kind of sulfur hexafluoride Developments of certified reference samples method
CN111743569A (en) * 2019-03-28 2020-10-09 无锡声美达医学技术有限公司 Instrument testing method, device and equipment
CN110389184A (en) * 2019-07-25 2019-10-29 国网重庆市电力公司电力科学研究院 Carbon fluorine decomposition product analysis method under a kind of SF6 gas-insulated defect
CN111781304A (en) * 2020-07-08 2020-10-16 安东仪器仪表检测有限公司 Calibration method of natural gas on-line water dew point instrument
CN114965836A (en) * 2022-06-01 2022-08-30 国网湖北省电力有限公司超高压公司 Background gas correction method based on ultraviolet infrared SF6 decomposed gas detection method

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