CN110455988B - Sensor array calculation method and system based on gas content in transformer insulating oil, monitor and monitoring method - Google Patents
Sensor array calculation method and system based on gas content in transformer insulating oil, monitor and monitoring method Download PDFInfo
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Abstract
A sensor array calculating method and a system, a monitor and a monitoring method based on gas content in transformer insulating oil are characterized in that R1, R2, R3, T1, T2, T3, K1, K2, K3, Nu0, Nt0 and Nk0 are calculated by detecting on a known standard gas, R1, R2, R3, T1, T2, T3, K1, K2 and K3 derive R1, R2, R3, T1, T2, T3, K1, K2 and K3, and derive Qu, Qt 2, T3, K1, K2 and K3 from R1, R2, R3, T1, T2, T3, K1 and K3 to obtain Qu, Qt and Qk, and the difference of reaction of three types of gases is utilized to distinguish different measured data of the actual concentrations of the three types of gases.
Description
Technical Field
The invention relates to a sensor array calculating method and system, a monitor and a monitoring method, in particular to a sensor array calculating method and system, a monitor and a monitoring method based on gas content in transformer insulating oil.
Background
The gas content in the hydrogen, carbon monoxide and hydrocarbon gas insulation oil is an important basis for diagnosing the fault of the transformer, three electrochemical sensors for respectively detecting the hydrogen, the carbon monoxide and the hydrocarbon gas can be selected for gas detection, each sensor respectively plays a main test role for the three gases, each sensor can respond to the three gases due to the existence of cross interference, the data measured by the sensors are the synthetic value of the concentrations of the three gases, the detected data can not be used as the true value of the gas concentration,
even if there are no three types of gases in the gas mixture, the three sensors can detect values other than zero, which are called "base lines" and are caused by interference from gases other than the three types of gases.
Disclosure of Invention
The object of the invention is a sensor array calculation method based on the gas content in transformer insulating oil,
the object of the invention is a sensor array system based on the gas content in transformer insulating oil,
the object of the invention is a monitor based on the gas content in transformer insulating oil,
the invention aims to provide a monitoring method based on the gas content in transformer insulating oil.
In order to overcome the technical disadvantages, the invention aims to provide a sensor array calculation method and system, a monitor and a monitoring method based on the gas content in transformer insulating oil, so that the difference of the reaction of three sensors to three types of gases is utilized to distinguish the actual concentration of various gases from the measured data.
In order to achieve the purpose, the invention adopts the technical scheme that:
a sensor array calculation method based on gas content in transformer insulating oil comprises the following steps:
step 100: r1, r2, r3, t1, t2, t3, k1, k2, k3, Nu0, Nt0 and Nk0 are calculated by Nu, Nt and Nk detected on a known standard gas,
step 200: r1, R2, R3, T1, T2, T3, K1, K2 and K3 are derived from R1, R2, R3, T1, T2, T3, K1, K2 and K3,
step 300: qu, Qt and Qk are obtained from R1, R2, R3, T1, T2, T3, K1, K2 and K3,
the gas in the transformer insulating oil is as follows: hydrogen, carbon monoxide, hydrocarbon gas,
nu: hydrogen reading measured by the monitor, Nt: carbon monoxide reading measured by the monitor, Nk: hydrocarbon readings measured by the monitor, Nu 0: hydrogen baseline, Nt 0: carbon monoxide baseline, Nk 0: hydrocarbon baseline, Qu: hydrogen content, Qt: carbon monoxide content, Qk: hydrocarbon content, r 1: influence coefficient of hydrogen on hydrogen sensor, r 2: coefficient of influence of carbon monoxide on hydrogen sensor, r 3: influence coefficient of hydrocarbon gas on hydrogen sensor, t 1: coefficient of influence of hydrogen on carbon monoxide sensor, t 2: coefficient of influence of carbon monoxide on carbon monoxide sensor, t 3: coefficient of influence of hydrocarbon gas on carbon monoxide sensor, k 1: coefficient of influence of hydrogen on hydrocarbon sensor, k 2: coefficient of influence of carbon monoxide on hydrocarbon sensor, k 3: coefficient of influence of hydrocarbon gas on hydrocarbon sensor, NU: net hydrogen reading, i.e., NU = NU-NU 0, NT: net carbon monoxide reading, NT = NT-NT 0, NK: hydrocarbon net readings, i.e., NK = NK-NK 0, R1: coefficient of influence of hydrogen readings on hydrogen content, R2: coefficient of influence of carbon monoxide readings on hydrogen content, R3: coefficient of influence of hydrocarbon readings on hydrogen content, T1: coefficient of influence of hydrogen readings on carbon monoxide content, T2: coefficient of influence of carbon monoxide readings on carbon monoxide content, T3: coefficient of influence of hydrocarbon readings on carbon monoxide content, K1: coefficient of influence of hydrogen readings on hydrocarbon content, K2: coefficient of influence of carbon monoxide readings on hydrocarbon content, K3: coefficient of influence of hydrocarbon readings on hydrocarbon content.
Due to the design of the steps, the difference of the three sensors in response to the three types of gases is utilized to distinguish the actual concentrations of various gases from the measured data.
The present invention is designed that step 100 specifically includes the following contents:
Nu=r1Qu+r2Qt+r3Qk+Nu0 1.1
Nt=t1Qu+t2Qt+t3Qk+Nt0 1.2
Nk=k1Qu+k2Qt+k3Qk+Nk0 1.3
r1Qu+r2Qt+r3Qk =NU 1.4
t1Qu+t2Qt+t3Qk=NT 1.5
k1Qu+k2Qt+k3Qk=NK 1.6
the present invention is designed that step 200 specifically includes the following contents:
R1=(t2k3-t3k2)/δ
R2=(r3k2-r2k3)/ δ
R3=(r2t3-r3t2)/ δ
T1=(t3k1-t1k3)/ δ
T2=(r1k3-r3k1)/ δ
T3=(r3t1-r1t3)/ δ
K1=(t1k2-t2k1)/ δ
K2=(r2k1-r1k2)/ δ
K3=(r1t2-r2t1)/ δ
wherein δ = r1t2k3+ r2t3k1+ r3t1k2-r1t3k2-r2t1k3-r3t2k1,
the present invention contemplates that step 300 specifically includes the following:
Qu=R1NU+R2NT+R3NK 1.7
Qt=T1NU+T2NT+T3NK 1.8
Qk=K1NU+K2NT+K3NK 1.9
the invention designs that the method comprises the following steps:
one, three baselines Nu0, Nt0, Nk0 are initialized to 0,
secondly, hydrogen baseline Nu0 is used as a constant, hydrogen readings obtained by respectively detecting hydrogen standard gas, carbon monoxide standard gas and hydrocarbon standard gas are substituted into formula 1.1, and a ternary linear equation set is obtained:
NUu=r1QUu+r2QUt+r3QUk+Nu0 2.1
NTu=r1QTu+r2QTt+r3QTk+Nu0 2.2
NKu=r1QKu+r2QKt+r3QKk+Nu0 2.3
wherein NUu, NTu, NKu: hydrogen readings respectively detected on hydrogen standard gas, carbon monoxide standard gas and hydrocarbon standard gas
QUu, QUt, QUk: the contents of hydrogen, carbon monoxide and hydrocarbon in the hydrogen standard gas are calibrated,
QTu, QTt, QTk: the content of hydrogen, carbon monoxide and hydrocarbon in the carbon monoxide standard gas is calibrated, and the ratio of QKu, QKt and QKk is as follows: the contents of hydrogen, carbon monoxide and hydrocarbon in the hydrocarbon standard gas are calibrated,
solving the three formulas to obtain three coefficients r1, r2 and r3,
thirdly, taking the carbon monoxide baseline Nt0 as a constant, and substituting carbon monoxide readings obtained by respectively detecting the hydrogen standard gas, the carbon monoxide standard gas and the hydrocarbon standard gas into a formula 1.2 to obtain a ternary linear equation set:
NUt=t1QUu+t2QUt+t3QUk+Nt0 2.4
NTt=t1QTu+t2QTt+t3QTk+Nt0 2.5
NKt=t1QKu+t2QKt+t3QKk+Nt0 2.6
wherein, NUt, NTt, NKt: carbon monoxide readings respectively detected on the hydrogen standard gas, the carbon monoxide standard gas and the hydrocarbon standard gas,
solving the three formulas to obtain three coefficients t1, t2 and t3,
fourthly, taking the hydrocarbon baseline Nk0 as a constant, and substituting the hydrocarbon readings obtained by respectively detecting the hydrogen standard gas, the carbon monoxide standard gas and the hydrocarbon standard gas into a formula 1.3 to obtain a ternary linear equation set:
NUk=k1QUu+k2QUt+k3QUk+Nk0 2.7
NTk=k1QTu+k2QTt+k3QTk+Nk0 2.8
NKk=k1QKu+k2QKt+k3QKk+Nk0 2.9
wherein, NUk, NTk, NKk: hydrocarbon readings respectively detected on hydrogen standard gas, carbon monoxide standard gas and hydrocarbon standard gas
Solving the three formulas to obtain three coefficients k1, k2 and k3,
substituting the three gas contents of r1, r2, r3, t1, t2, t3, k1, k2, k3, Nu0, Nt0 and Nk0 into formula 1.4, formula 1.5 and formula 1.6 to obtain:
r1QZu+r2QZt+r3QZk =NU 2.4
t1QZu+t2QZt+t3QZk=NT 2.5
k1QZu+k2QZt+k3QZk=NK 2.6
wherein QZu, QZt, QZk: the content of hydrogen, carbon monoxide and hydrocarbon in the zero value standard gas (known),
the hydrogen net reading, the carbon monoxide net reading and the hydrocarbon net reading on the zero-value standard gas theory can be calculated by the three formulas,
subtracting the hydrogen net reading, the carbon monoxide net reading and the hydrocarbon net reading from the hydrogen reading, the carbon monoxide reading and the hydrocarbon reading in the zero-value standard gas respectively to obtain a hydrogen baseline, a carbon monoxide baseline and a hydrocarbon baseline,
seventhly, the hydrogen baseline, the carbon monoxide baseline and the hydrocarbon baseline which are obtained by calculation in the sixth step are regarded as constants, the second step is returned, r1, r2, r3, t1, t2, t3, k1, k2 and k3 are recalculated, after the iteration is repeated for five times, the three gas baselines and the values of r1, r2, r3, t1, t2, t3, k1, k2 and k3 are basically stable, the iteration time does not need to be increased,
eighthly, formula 1.7, formula 1.8 and formula 1.9 can be obtained by formula 1.4, formula 1.5 and formula 1.6, so that R1, R2, R3, T1, T2, T3, K1, K2, K3 is converted into R1, R2, R3, T1, T2, T3, K1, K2, K3:
R1=(t2k3-t3k2)/δ 2.7
R2=(r3k2-r2k3)/ δ 2.8
R3=(r2t3-r3t2)/ δ 2.9
T1=(t3k1-t1k3)/ δ 2.10
T2=(r1k3-r3k1)/ δ 2.11
T3=(r3t1-r1t3)/ δ 2.12
K1=(t1k2-t2k1)/ δ 2.13
K2=(r2k1-r1k2)/ δ 2.14
K3=(r1t2-r2t1)/ δ 2.15
wherein δ = r1t2k3+ r2t3k1+ r3t1k2-r1t3k2-r2t1k3-r3t2k 12.16
And ninthly, subtracting the three gas baselines which are just obtained from the three gas readings obtained by the mixed standard gas detection to obtain the net readings of the three gases, then calculating the contents of the three gases in the mixed standard gas by using the R1, R2, R3, T1, T2, T3, K1, K2 and K3 which are just calculated, and comparing the contents with the known contents of the three gases in the mixed standard gas by using a formula 1.7, a formula 1.8 and a formula 1.9, wherein if the error is in an allowed range, the calibration coefficient of the monitor is effective, the calibration work is finished, and if the error is beyond the allowed range, the calibration fails, and the calibration is carried out again.
The invention designs a sensor array system based on the gas content in transformer insulating oil, which comprises the following contents:
the building unit 10 is established by detecting and calculating r1, r2, r3, t1, t2, t3, k1, k2, k3, Nu0, Nt0 and Nk0 on a known standard gas,
r1, R2, R3, T1, T2, T3, K1, K2 and K3 are derived from R1, R2, R3, T1, T2, T3, K1, K2 and K3 to establish the unit 20,
qu, Qt and Qk establishing unit 30 is obtained from R1, R2, R3, T1, T2, T3, K1, K2 and K3.
The invention designs a monitor based on the gas content in transformer insulating oil, which comprises the following contents: a sensor array system based on the gas content in the transformer insulating oil is stored in the monitor,
the invention designs a sensor array system based on the gas content in the transformer insulating oil, which is obtained according to the sensor array calculation method based on the gas content in the transformer insulating oil,
the invention designs that when the monitor is calibrated, the contents of three gases in each standard gas are known, and after three gas readings are measured, the monitor coefficient and the base line are calculated. During calibration, five standard gases are available, and the concentration values of the three types of gases are known and are different only:
the hydrogen content of the hydrogen standard gas is higher, the content of carbon monoxide and hydrocarbon is lower,
the carbon monoxide content of the carbon monoxide standard gas is higher, the hydrogen and hydrocarbon content is lower,
the hydrocarbon content of the hydrocarbon standard gas is higher, the content of hydrogen and carbon monoxide is lower,
the content of hydrogen, carbon monoxide and hydrocarbon in the mixed standard gas is higher,
the zero value standard gas has low contents of hydrogen, carbon monoxide and hydrocarbon and is close to the baseline value of the sensor.
The invention designs a monitoring method based on the gas content in transformer insulating oil, which comprises the following steps:
the CPU is controlled by a monitor based on the gas content in the insulating oil of the transformer.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a sensor array calculation method based on gas content in transformer insulating oil according to the present invention,
fig. 2 is a schematic diagram of a monitor based on the gas content in transformer insulating oil according to the present invention.
Detailed Description
Terms such as "having," "including," and "comprising," as used with respect to the present invention, are to be understood as not specifying the presence or addition of one or more other elements or combinations thereof, in accordance with the examination guidelines.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The invention is further described below with reference to the following examples, which are intended to illustrate the invention but not to limit it further.
A method for calculating a sensor array based on the gas content in transformer insulating oil, according to a first embodiment of the present invention, comprises the steps of:
step 100: r1, r2, r3, t1, t2, t3, k1, k2, k3, Nu0, Nt0 and Nk0 are calculated by Nu, Nt and Nk detected on a known standard gas,
step 200: r1, R2, R3, T1, T2, T3, K1, K2 and K3 are derived from R1, R2, R3, T1, T2, T3, K1, K2 and K3,
step 300: qu, Qt and Qk are obtained from R1, R2, R3, T1, T2, T3, K1, K2 and K3,
the gas in the transformer insulating oil is as follows: hydrogen, carbon monoxide, hydrocarbon gas,
nu: hydrogen reading measured by the monitor, Nt: carbon monoxide reading measured by the monitor, Nk: hydrocarbon readings measured by the monitor, Nu 0: hydrogen baseline, Nt 0: carbon monoxide baseline, Nk 0: hydrocarbon baseline, Qu: hydrogen content, Qt: carbon monoxide content, Qk: hydrocarbon content, r 1: influence coefficient of hydrogen on hydrogen sensor, r 2: coefficient of influence of carbon monoxide on hydrogen sensor, r 3: influence coefficient of hydrocarbon gas on hydrogen sensor, t 1: coefficient of influence of hydrogen on carbon monoxide sensor, t 2: coefficient of influence of carbon monoxide on carbon monoxide sensor, t 3: coefficient of influence of hydrocarbon gas on carbon monoxide sensor, k 1: coefficient of influence of hydrogen on hydrocarbon sensor, k 2: coefficient of influence of carbon monoxide on hydrocarbon sensor, k 3: coefficient of influence of hydrocarbon gas on hydrocarbon sensor, NU: net hydrogen reading, i.e., NU = NU-NU 0, NT: net carbon monoxide reading, NT = NT-NT 0, NK: hydrocarbon net readings, i.e., NK = NK-NK 0, R1: coefficient of influence of hydrogen readings on hydrogen content, R2: coefficient of influence of carbon monoxide readings on hydrogen content, R3: coefficient of influence of hydrocarbon readings on hydrogen content, T1: coefficient of influence of hydrogen readings on carbon monoxide content, T2: coefficient of influence of carbon monoxide readings on carbon monoxide content, T3: coefficient of influence of hydrocarbon readings on carbon monoxide content, K1: coefficient of influence of hydrogen readings on hydrocarbon content, K2: coefficient of influence of carbon monoxide readings on hydrocarbon content, K3: coefficient of influence of hydrocarbon readings on hydrocarbon content.
In the present embodiment, the step 100 specifically includes the following contents:
Nu=r1Qu+r2Qt+r3Qk+Nu0 1.1
Nt=t1Qu+t2Qt+t3Qk+Nt0 1.2
Nk=k1Qu+k2Qt+k3Qk+Nk0 1.3
r1Qu+r2Qt+r3Qk =NU 1.4
t1Qu+t2Qt+t3Qk=NT 1.5
k1Qu+k2Qt+k3Qk=NK 1.6
in this embodiment, the step 200 specifically includes the following contents:
R1=(t2k3-t3k2)/δ
R2=(r3k2-r2k3)/ δ
R3=(r2t3-r3t2)/ δ
T1=(t3k1-t1k3)/ δ
T2=(r1k3-r3k1)/ δ
T3=(r3t1-r1t3)/ δ
K1=(t1k2-t2k1)/ δ
K2=(r2k1-r1k2)/ δ
K3=(r1t2-r2t1)/ δ
wherein δ = r1t2k3+ r2t3k1+ r3t1k2-r1t3k2-r2t1k3-r3t2k1,
in this embodiment, the step 300 specifically includes the following contents:
Qu=R1NU+R2NT+R3NK 1.7
Qt=T1NU+T2NT+T3NK 1.8
Qk=K1NU+K2NT+K3NK 1.9
when the monitor is calibrated, the content of three gases in each standard gas is known, and after three gas readings are measured, the monitor coefficient and the base line are calculated. During calibration, five standard gases are available, and the concentration values of the three types of gases are known and are different only:
the hydrogen content of the hydrogen standard gas is high, and the content of carbon monoxide and hydrocarbon is low.
The carbon monoxide content of the carbon monoxide standard gas is higher, and the hydrogen and hydrocarbon content is lower.
The hydrocarbon standard gas has high hydrocarbon content and low hydrogen and carbon monoxide content.
The content of hydrogen, carbon monoxide and hydrocarbon in the mixed standard gas is high.
The zero value standard gas has low content of hydrogen, carbon monoxide and hydrocarbon and is close to the baseline value of the sensor
The second embodiment of the present invention comprises the following steps:
one, three baselines Nu0, Nt0, Nk0 are initialized to 0,
secondly, hydrogen baseline Nu0 is used as a constant, hydrogen readings obtained by respectively detecting hydrogen standard gas, carbon monoxide standard gas and hydrocarbon standard gas are substituted into formula 1.1, and a ternary linear equation set is obtained:
NUu=r1QUu+r2QUt+r3QUk+Nu0 2.1
NTu=r1QTu+r2QTt+r3QTk+Nu0 2.2
NKu=r1QKu+r2QKt+r3QKk+Nu0 2.3
wherein NUu, NTu, NKu: hydrogen readings respectively detected on hydrogen standard gas, carbon monoxide standard gas and hydrocarbon standard gas
QUu, QUt, QUk: the contents of hydrogen, carbon monoxide and hydrocarbon in the hydrogen standard gas are calibrated,
QTu, QTt, QTk: the content of hydrogen, carbon monoxide and hydrocarbon in the carbon monoxide standard gas is calibrated, and the ratio of QKu, QKt and QKk is as follows: the contents of hydrogen, carbon monoxide and hydrocarbon in the hydrocarbon standard gas are calibrated,
solving the three formulas to obtain three coefficients r1, r2 and r3,
thirdly, taking the carbon monoxide baseline Nt0 as a constant, and substituting carbon monoxide readings obtained by respectively detecting the hydrogen standard gas, the carbon monoxide standard gas and the hydrocarbon standard gas into a formula 1.2 to obtain a ternary linear equation set:
NUt=t1QUu+t2QUt+t3QUk+Nt0 2.4
NTt=t1QTu+t2QTt+t3QTk+Nt0 2.5
NKt=t1QKu+t2QKt+t3QKk+Nt0 2.6
wherein, NUt, NTt, NKt: carbon monoxide readings respectively detected on the hydrogen standard gas, the carbon monoxide standard gas and the hydrocarbon standard gas.
Solving the three formulas to obtain three coefficients t1, t2 and t3,
fourthly, taking the hydrocarbon baseline Nk0 as a constant, and substituting the hydrocarbon readings obtained by respectively detecting the hydrogen standard gas, the carbon monoxide standard gas and the hydrocarbon standard gas into a formula 1.3 to obtain a ternary linear equation set:
NUk=k1QUu+k2QUt+k3QUk+Nk0 2.7
NTk=k1QTu+k2QTt+k3QTk+Nk0 2.8
NKk=k1QKu+k2QKt+k3QKk+Nk0 2.9
wherein, NUk, NTk, NKk: hydrocarbon readings respectively detected on hydrogen standard gas, carbon monoxide standard gas and hydrocarbon standard gas
Solving the three formulas to obtain three coefficients k1, k2 and k3,
substituting the three gas contents of r1, r2, r3, t1, t2, t3, k1, k2, k3, Nu0, Nt0 and Nk0 into formula 1.4, formula 1.5 and formula 1.6 to obtain:
r1QZu+r2QZt+r3QZk =NU 2.4
t1QZu+t2QZt+t3QZk=NT 2.5
k1QZu+k2QZt+k3QZk=NK 2.6
wherein QZu, QZt, QZk: the zero value standard gas contains hydrogen, carbon monoxide and hydrocarbon (known).
The hydrogen net reading, the carbon monoxide net reading and the hydrocarbon net reading on the zero-value standard gas theory can be calculated by the three formulas,
subtracting the hydrogen net reading, the carbon monoxide net reading and the hydrocarbon net reading from the hydrogen reading, the carbon monoxide reading and the hydrocarbon reading in the zero-value standard gas respectively to obtain a hydrogen baseline, a carbon monoxide baseline and a hydrocarbon baseline,
seventhly, the hydrogen baseline, the carbon monoxide baseline and the hydrocarbon baseline which are obtained by calculation in the sixth step are regarded as constants, the second step is returned, r1, r2, r3, t1, t2, t3, k1, k2 and k3 are recalculated, after the iteration is repeated for five times, the three gas baselines and the values of r1, r2, r3, t1, t2, t3, k1, k2 and k3 are basically stable, the iteration time does not need to be increased,
eighthly, formula 1.7, formula 1.8 and formula 1.9 can be obtained by formula 1.4, formula 1.5 and formula 1.6, so that R1, R2, R3, T1, T2, T3, K1, K2, K3 is converted into R1, R2, R3, T1, T2, T3, K1, K2, K3:
R1=(t2k3-t3k2)/δ 2.7
R2=(r3k2-r2k3)/ δ 2.8
R3=(r2t3-r3t2)/ δ 2.9
T1=(t3k1-t1k3)/ δ 2.10
T2=(r1k3-r3k1)/ δ 2.11
T3=(r3t1-r1t3)/ δ 2.12
K1=(t1k2-t2k1)/ δ 2.13
K2=(r2k1-r1k2)/ δ 2.14
K3=(r1t2-r2t1)/ δ 2.15
wherein δ = r1t2k3+ r2t3k1+ r3t1k2-r1t3k2-r2t1k3-r3t2k 12.16
And ninthly, subtracting the three gas baselines which are just obtained from the three gas readings obtained by the mixed standard gas detection to obtain the net readings of the three gases, then calculating the contents of the three gases in the mixed standard gas by using the R1, R2, R3, T1, T2, T3, K1, K2 and K3 which are just calculated, and comparing the contents with the known contents of the three gases in the mixed standard gas by using a formula 1.7, a formula 1.8 and a formula 1.9, wherein if the error is in an allowed range, the calibration coefficient of the monitor is effective, the calibration work is finished, and if the error is beyond the allowed range, the calibration fails, and the calibration is carried out again.
Nu, Nt, Nk: hydrogen readings, carbon monoxide readings, hydrocarbon readings measured by a monitor
Nu0, Nt0, Nk 0: hydrogen baseline, carbon monoxide baseline, hydrocarbon baseline.
③ Qu, Qt, Qk: hydrogen content, carbon monoxide content, hydrocarbon content.
R1, r2, r 3: influence coefficient of hydrogen, carbon monoxide and hydrocarbon gas on hydrogen sensor
T1, t2, t 3: influence coefficient of hydrogen, carbon monoxide and hydrocarbon gas on carbon monoxide sensor
Sixthly, k1, k2, k 3: influence coefficient of hydrogen, carbon monoxide and hydrocarbon gas on hydrocarbon sensor
NU = NU-NU 0: after subtracting the hydrogen baseline, the hydrogen net reading.
NT = NT-NT 0: after subtraction of the carbon monoxide baseline, a net carbon monoxide reading.
(iii) NK = NK-NK 0: after subtraction of the hydrocarbon baseline, the hydrocarbon net reading.
R1, R2, R3: hydrogen readings, carbon monoxide readings, hydrocarbon readings, and the coefficient of influence on hydrogen content. T1, T2, T3: hydrogen readings, carbon monoxide readings, hydrocarbon readings, and the coefficient of influence on carbon monoxide content. K1, K2, K3: hydrogen readings, carbon monoxide readings, hydrocarbon readings, and the coefficient of influence of hydrocarbon content.
A sensor array system based on gas content in transformer insulating oil comprises the following contents:
the establishing unit 10 calculates r1, r2, r3, t1, t2, t3, k1, k2, k3, Nu0, Nt0 and Nk0 by detecting on a known standard gas,
r1, R2, R3, T1, T2, T3, K1, K2 and K3 are derived from R1, R2, R3, T1, T2, T3, K1, K2 and K3 to establish the unit 20,
qu, Qt and Qk establishing unit 30 is obtained from R1, R2, R3, T1, T2, T3, K1, K2 and K3.
A monitor based on gas content in transformer insulating oil comprises the following contents: a sensor array system based on the gas content in the transformer insulating oil is stored in the monitor,
in the embodiment, the sensor array system based on the gas content in the transformer insulating oil is obtained according to the sensor array calculation method based on the gas content in the transformer insulating oil,
step 100: by detecting on a known standard gas, r1, r2, r3, t1, t2, t3, k1, k2, k3, Nu0, Nt0 and Nk0 are calculated,
step 200: r1, R2, R3, T1, T2, T3, K1, K2 and K3 are derived from R1, R2, R3, T1, T2, T3, K1, K2 and K3,
step 300: qu, Qt and Qk are obtained from R1, R2, R3, T1, T2, T3, K1, K2 and K3,
a monitoring method based on gas content in transformer insulating oil comprises the following steps:
the CPU is controlled by a monitor based on the gas content in the insulating oil of the transformer.
The above embodiment is only one implementation form of the sensor array calculating method and system, the monitor and the monitoring method based on the gas content in the transformer insulating oil provided by the invention, and other variations of the scheme provided by the invention, such as adding or reducing components or steps therein, or using the invention in other technical fields close to the invention, belong to the protection scope of the invention.
Claims (1)
1. A sensor array calculation method based on gas content in transformer insulating oil is characterized by comprising the following steps: the method comprises the following steps:
step 100: by detecting on a known standard gas, r1, r2, r3, t1, t2, t3, k1, k2, k3, Nu0, Nt0 and Nk0 are calculated,
step 200: r1, R2, R3, T1, T2, T3, K1, K2 and K3 are derived from R1, R2, R3, T1, T2, T3, K1, K2 and K3,
step 300: qu, Qt and Qk are obtained from R1, R2, R3, T1, T2, T3, K1, K2 and K3,
the gas in the transformer insulating oil is as follows: hydrogen, carbon monoxide, hydrocarbon gas,
nu: hydrogen reading measured by the monitor, Nt: carbon monoxide reading measured by the monitor, Nk: hydrocarbon readings measured by the monitor, Nu 0: hydrogen baseline, Nt 0: carbon monoxide baseline, Nk 0: hydrocarbon baseline, Qu: hydrogen content, Qt: carbon monoxide content, Qk: hydrocarbon content, r 1: influence coefficient of hydrogen on hydrogen sensor, r 2: coefficient of influence of carbon monoxide on hydrogen sensor, r 3: influence coefficient of hydrocarbon gas on hydrogen sensor, t 1: coefficient of influence of hydrogen on carbon monoxide sensor, t 2: coefficient of influence of carbon monoxide on carbon monoxide sensor, t 3: coefficient of influence of hydrocarbon gas on carbon monoxide sensor, k 1: coefficient of influence of hydrogen on hydrocarbon sensor, k 2: coefficient of influence of carbon monoxide on hydrocarbon sensor, k 3: coefficient of influence of hydrocarbon gas on hydrocarbon sensor, NU: net hydrogen reading, i.e., NU = NU-NU 0, NT: net carbon monoxide reading, NT = NT-NT 0, NK: hydrocarbon net readings, i.e., NK = NK-NK 0, R1: coefficient of influence of hydrogen readings on hydrogen content, R2: coefficient of influence of carbon monoxide readings on hydrogen content, R3: coefficient of influence of hydrocarbon readings on hydrogen content, T1: coefficient of influence of hydrogen readings on carbon monoxide content, T2: coefficient of influence of carbon monoxide readings on carbon monoxide content, T3: coefficient of influence of hydrocarbon readings on carbon monoxide content, K1: coefficient of influence of hydrogen readings on hydrocarbon content, K2: coefficient of influence of carbon monoxide readings on hydrocarbon content, K3: the coefficient of influence of the hydrocarbon reading on the hydrocarbon content,
wherein: the step 100 specifically includes the following contents:
Nu=r1Qu+r2Qt+r3Qk+Nu0 1.1
Nt=t1Qu+t2Qt+t3Qk+Nt0 1.2
Nk=k1Qu+k2Qt+k3Qk+Nk0 1.3
r1Qu+r2Qt+r3Qk =NU 1.4
t1Qu+t2Qt+t3Qk=NT 1.5
k1Qu+k2Qt+k3Qk=NK 1.6 ，
the step 200 specifically includes the following contents:
R1=(t2k3-t3k2)/δ
R2=(r3k2-r2k3)/ δ
R3=(r2t3-r3t2)/ δ
T1=(t3k1-t1k3)/ δ
T2=(r1k3-r3k1)/ δ
T3=(r3t1-r1t3)/ δ
K1=(t1k2-t2k1)/ δ
K2=(r2k1-r1k2)/ δ
K3=(r1t2-r2t1)/ δ
wherein δ = r1t2k3+ r2t3k1+ r3t1k2-r1t3k2-r2t1k3-r3t2k1,
step 300 specifically includes the following steps:
Qu=R1NU+R2NT+R3NK 1.7
Qt=T1NU+T2NT+T3NK 1.8
Qk=K1NU+K2NT+K3NK 1.9，
one, three baselines Nu0, Nt0, Nk0 are initialized to 0,
secondly, hydrogen baseline Nu0 is used as a constant, hydrogen readings obtained by respectively detecting hydrogen standard gas, carbon monoxide standard gas and hydrocarbon standard gas are substituted into formula 1.1, and a ternary linear equation set is obtained:
NUu=r1QUu+r2QUt+r3QUk+Nu0 2.1
NTu=r1QTu+r2QTt+r3QTk+Nu0 2.2
NKu=r1QKu+r2QKt+r3QKk+Nu0 2.3
wherein NUu, NTu, NKu: hydrogen readings respectively detected on hydrogen standard gas, carbon monoxide standard gas and hydrocarbon standard gas
QUu, QUt, QUk: the contents of hydrogen, carbon monoxide and hydrocarbon in the hydrogen standard gas are calibrated,
QTu, QTt, QTk: the content of hydrogen, carbon monoxide and hydrocarbon in the carbon monoxide standard gas is calibrated, and the ratio of QKu, QKt and QKk is as follows: the contents of hydrogen, carbon monoxide and hydrocarbon in the hydrocarbon standard gas are calibrated,
solving the three formulas to obtain three coefficients r1, r2 and r3,
thirdly, taking the carbon monoxide baseline Nt0 as a constant, and substituting carbon monoxide readings obtained by respectively detecting the hydrogen standard gas, the carbon monoxide standard gas and the hydrocarbon standard gas into a formula 1.2 to obtain a ternary linear equation set:
NUt=t1QUu+t2QUt+t3QUk+Nt0 2.4
NTt=t1QTu+t2QTt+t3QTk+Nt0 2.5
NKt=t1QKu+t2QKt+t3QKk+Nt0 2.6
wherein, NUt, NTt, NKt: carbon monoxide readings respectively detected on the hydrogen standard gas, the carbon monoxide standard gas and the hydrocarbon standard gas,
solving the three formulas to obtain three coefficients t1, t2 and t3,
fourthly, taking the hydrocarbon baseline Nk0 as a constant, and substituting the hydrocarbon readings obtained by respectively detecting the hydrogen standard gas, the carbon monoxide standard gas and the hydrocarbon standard gas into a formula 1.3 to obtain a ternary linear equation set:
NUk=k1QUu+k2QUt+k3QUk+Nk0 2.7
NTk=k1QTu+k2QTt+k3QTk+Nk0 2.8
NKk=k1QKu+k2QKt+k3QKk+Nk0 2.9
wherein, NUk, NTk, NKk: hydrocarbon readings respectively detected on hydrogen standard gas, carbon monoxide standard gas and hydrocarbon standard gas
Solving the three formulas to obtain three coefficients k1, k2 and k3,
substituting the three gas contents of r1, r2, r3, t1, t2, t3, k1, k2, k3, Nu0, Nt0 and Nk0 into formula 1.4, formula 1.5 and formula 1.6 to obtain:
r1QZu+r2QZt+r3QZk =NU 2.4
t1QZu+t2QZt+t3QZk=NT 2.5
k1QZu+k2QZt+k3QZk=NK 2.6
wherein QZu, QZt, QZk: the content of hydrogen, carbon monoxide and hydrocarbon in the zero value standard gas (known),
the hydrogen net reading, the carbon monoxide net reading and the hydrocarbon net reading on the zero-value standard gas theory can be calculated by the three formulas,
subtracting the hydrogen net reading, the carbon monoxide net reading and the hydrocarbon net reading from the hydrogen reading, the carbon monoxide reading and the hydrocarbon reading in the zero-value standard gas respectively to obtain a hydrogen baseline, a carbon monoxide baseline and a hydrocarbon baseline,
seventhly, the hydrogen baseline, the carbon monoxide baseline and the hydrocarbon baseline which are obtained by calculation in the sixth step are regarded as constants, the second step is returned, r1, r2, r3, t1, t2, t3, k1, k2 and k3 are recalculated, after the iteration is repeated for five times, the three gas baselines and the values of r1, r2, r3, t1, t2, t3, k1, k2 and k3 are basically stable, the iteration time does not need to be increased,
eighthly, formula 1.7, formula 1.8 and formula 1.9 can be obtained by formula 1.4, formula 1.5 and formula 1.6, so that R1, R2, R3, T1, T2, T3, K1, K2, K3 is converted into R1, R2, R3, T1, T2, T3, K1, K2, K3:
R1=(t2k3-t3k2)/δ 2.7
R2=(r3k2-r2k3)/ δ 2.8
R3=(r2t3-r3t2)/ δ 2.9
T1=(t3k1-t1k3)/ δ 2.10
T2=(r1k3-r3k1)/ δ 2.11
T3=(r3t1-r1t3)/ δ 2.12
K1=(t1k2-t2k1)/ δ 2.13
K2=(r2k1-r1k2)/ δ 2.14
K3=(r1t2-r2t1)/ δ 2.15
wherein δ = r1t2k3+ r2t3k1+ r3t1k2-r1t3k2-r2t1k3-r3t2k 12.16
And ninthly, subtracting the three gas baselines obtained in the step seven from the three gas readings obtained in the mixed standard gas detection to obtain net readings of the three gases, calculating the contents of the three gases in the mixed standard gas through R1, R2, R3, T1, T2, T3, K1, K2 and K3 calculated in the step eight, calculating the contents of the three gases in the mixed standard gas through a formula 1.7, a formula 1.8 and a formula 1.9, comparing the contents with the known contents of the three gases in the mixed standard gas, if the error is in an allowed range, determining that the calibration coefficient of the monitor is effective, ending the calibration work, and if the error is beyond the allowed range, determining that the calibration fails, and performing the calibration again.
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