CN105301367A - Dual-port electrical appliance transmission parameter acquiring method and system - Google Patents
Dual-port electrical appliance transmission parameter acquiring method and system Download PDFInfo
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- CN105301367A CN105301367A CN201510853156.9A CN201510853156A CN105301367A CN 105301367 A CN105301367 A CN 105301367A CN 201510853156 A CN201510853156 A CN 201510853156A CN 105301367 A CN105301367 A CN 105301367A
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Abstract
The invention provides a dual-port electrical appliance transmission parameter acquiring method and system. An impedance parameter of a dual-port electrical appliance in a low-frequency band is obtained by means of an impedance analyzer. A scattering parameter of the appliance in a high-frequency band is obtained by means of a network analyzer. A transmission parameter of the appliance is determined according to the impedance parameter and the scattering parameter. The method and the system can obtain the impedance parameter of the low-frequency band by means of the impedance analyzer and the scattering parameter of the high-frequency band by means of the network analyzer and can determine the transmission parameter according to the impedance parameter and the scattering parameter, thereby solving the problems that during the process of obtaining electrical appliance transmission parameters, for low frequency situations, instrument test frequency may not cover the low frequency or accurate transmission parameters in low-frequency bands may not be obtained. The method and the system can obtain accurate transmission parameters of the dual-port electrical appliance in the low-frequency and high-frequency bands.
Description
Technical field
The invention belongs to field of electrical equipment, particularly relate to a kind of Two-port netwerk power equipment transformation parameter acquisition methods and system.
Background technology
The transformation parameter of power equipment for the electric power line voltage accurately calculated in thunderbolt, operation or fault overvoltage situation and electric current branch significant.
At present, obtaining conventional network analyzer due to its ultimate principle for power equipment transformation parameter is obtain transformation parameter by scattering parameter, therefore may occur that instrument test frequency can not cover or accurately can not obtain the problem of transformation parameter for the transformation parameter in low frequency situation.
Summary of the invention
Based on this, be necessary to provide a kind of Two-port netwerk power equipment that can obtain exactly in the Two-port netwerk power equipment transformation parameter acquisition methods of the transformation parameter of low-frequency range and high band and system.
A kind of Two-port netwerk power equipment transformation parameter acquisition methods, comprises step:
The impedance parameter of Two-port netwerk power equipment in low-frequency range is obtained by electric impedance analyzer;
The scattering parameter of described Two-port netwerk power equipment at high band is obtained by network analyzer;
The transformation parameter of described Two-port netwerk power equipment is determined according to described impedance parameter and described scattering parameter.
Above-mentioned Two-port netwerk power equipment transformation parameter acquisition methods, owing to can be obtained the impedance parameter of low-frequency range by electric impedance analyzer, the scattering parameter of high band is obtained by network analyzer, and according to impedance parameter and scattering parameter determination transformation parameter, thus when solving the acquisition of power equipment transformation parameter, may occur that instrument test frequency can not cover or accurately can not obtain the problem of transformation parameter for the transformation parameter in low frequency situation, the transformation parameter of Two-port netwerk power equipment at low-frequency range and high band can be obtained exactly.
The Two-port netwerk power equipment transformation parameter corresponding with above-mentioned Two-port netwerk power equipment transformation parameter acquisition methods obtains a system, comprising:
Impedance parameter acquisition module, for obtaining the impedance parameter of Two-port netwerk power equipment in low-frequency range by electric impedance analyzer;
Scattering parameter acquisition module, for obtaining the scattering parameter of described Two-port netwerk power equipment at high band by network analyzer;
Transformation parameter determination module, for determining the transformation parameter of described Two-port netwerk power equipment according to described impedance parameter and described scattering parameter.
Above-mentioned Two-port netwerk power equipment transformation parameter obtains system, because impedance parameter acquisition module can obtain the impedance parameter of low-frequency range by electric impedance analyzer, scattering parameter acquisition module obtains the scattering parameter of high band by network analyzer, and transformation parameter determination module is according to impedance parameter and scattering parameter determination transformation parameter, thus when solving the acquisition of power equipment transformation parameter, may occur that instrument test frequency can not cover or accurately can not obtain the problem of transformation parameter for the transformation parameter in low frequency situation, the transformation parameter of Two-port netwerk power equipment at low-frequency range and high band can be obtained exactly.
Accompanying drawing explanation
Fig. 1 is a kind of process flow diagram of Two-port netwerk power equipment transformation parameter acquisition methods of embodiment;
Fig. 2 is the process flow diagram of the Two-port netwerk power equipment transformation parameter acquisition methods of another kind of embodiment;
Fig. 3 is the particular flow sheet of a step of the Two-port netwerk power equipment transformation parameter acquisition methods of Fig. 1 or Fig. 2;
Fig. 4 is the particular flow sheet of another step of the Two-port netwerk power equipment transformation parameter acquisition methods of Fig. 1 or Fig. 2;
Fig. 5 is a kind of structural drawing of Two-port netwerk power equipment transformation parameter acquisition system of embodiment;
Fig. 6 is the structural drawing of the Two-port netwerk power equipment transformation parameter acquisition system of another kind of embodiment;
Fig. 7 is the cellular construction figure of a module of the Two-port netwerk power equipment transformation parameter acquisition system of Fig. 5 or Fig. 6;
Fig. 8 is the cellular construction figure of another module of the Two-port netwerk power equipment transformation parameter acquisition system of Fig. 5 or Fig. 6.
Embodiment
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.Preferred embodiment of the present invention is given in accompanying drawing.But the present invention can realize in many different forms, is not limited to embodiment described herein.On the contrary, provide the object of these embodiments be make the understanding of disclosure of the present invention more comprehensively thorough.
Unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present invention understand usually.The object of term used in the description of the invention herein just in order to describe specific embodiment, is not intended to be restriction the present invention.Term as used herein " or/and " comprise arbitrary and all combinations of one or more relevant Listed Items.
As shown in Figure 1, be the Two-port netwerk power equipment transformation parameter acquisition methods of one embodiment of the present invention, comprise step:
S130: obtain the impedance parameter of Two-port netwerk power equipment in low-frequency range by electric impedance analyzer.
Electric impedance analyzer can the impedance parameter of Obtaining Accurate low-frequency range.
S150: obtain the scattering parameter of described Two-port netwerk power equipment at high band by network analyzer.
Network analyzer can the scattering parameter of Obtaining Accurate high band.
S170: the transformation parameter determining described Two-port netwerk power equipment according to described impedance parameter and described scattering parameter.
Low-frequency transmission parameter accurately can be determined by impedance parameter accurately.High-frequency transmission parameter accurately can be determined by scattering parameter accurately.Transformation parameter is the combination of low-frequency transmission parameter and high-frequency transmission parameter.
Above-mentioned Two-port netwerk power equipment transformation parameter acquisition methods, owing to can be obtained the impedance parameter of low-frequency range by electric impedance analyzer, the scattering parameter of high band is obtained by network analyzer, and according to impedance parameter and scattering parameter determination transformation parameter, thus when solving the acquisition of power equipment transformation parameter, may occur that instrument test frequency can not cover or accurately can not obtain the problem of transformation parameter for the transformation parameter in low frequency situation, the transformation parameter of Two-port netwerk power equipment at low-frequency range and high band can be obtained exactly.
Refer to Fig. 2, wherein in an embodiment, before step S130 and step S150, also comprise step:
S110: obtain low-limit frequency, highest frequency and default intermediate frequency.
Wherein in an embodiment, described low-frequency range is the frequency range of described low-limit frequency to described default intermediate frequency; Described high band is the frequency range of described default intermediate frequency to described highest frequency.
In the present embodiment, default intermediate frequency is 500kHz.
Please continue to refer to Fig. 2, wherein in an embodiment, before step S130, also comprise step:
S120: select frequency range to cover the electric impedance analyzer of described low-frequency range.
So, ensure that electric impedance analyzer can obtain impedance parameter accurately.
Before step S150, also comprise step:
S140: select frequency range to cover the network analyzer of described high band.
So, ensure that network analyzer can obtain scattering parameter accurately.
Wherein in an embodiment, described impedance parameter comprises that first opens parameter, the first short parameter, second opens parameter and the second short parameter.
Refer to Fig. 3, step S130, comprising:
S131: by first port of electric impedance analyzer from described Two-port netwerk power equipment, when obtaining the second port open of described Two-port netwerk power equipment first opens parameter.
S133: by first port of electric impedance analyzer from described Two-port netwerk power equipment, obtains the first short parameter during the second port short circuit of described Two-port netwerk power equipment.
S135: by second port of electric impedance analyzer from described Two-port netwerk power equipment, when obtaining the first port open of described Two-port netwerk power equipment second opens parameter.
S137: by second port of electric impedance analyzer from described Two-port netwerk power equipment, obtains the second short parameter during the first port short circuit of described Two-port netwerk power equipment.
Further, refer to Fig. 4, described step S170, comprising:
S171: according to described first opening parameter, described first short parameter, described second opens parameter and described second short parameter determination low-frequency impedance parameter matrix.
Particularly, the determination formula of described low-frequency impedance parameter matrix is:
ZPL=[ZPL11, ZPL12; ZPL21, ZPL22]; ZPL11=Z1O, ZPL12=Z2O*Z1O-Z2S*Z1O, ZPL21=Z1O*Z2O-Z1S*Z2O, ZPL22=Z2O; Wherein, ZPL represents described low-frequency impedance matrix, and Z1O represents that described first opens parameter, and Z1S represents described first short parameter, and Z2O represents that described second opens parameter, and Z2S represents described second short parameter.
S173: according to described low-frequency impedance parameter matrix determination low-frequency transmission parameter; Described transformation parameter comprises described low-frequency transmission parameter.
Particularly, the determination formula of described low-frequency transmission parameter is:
TL=[ZPL11/ZPL21, NPL/ZPL21; 1/ZPL21, ZPL22/ZPL21]; Wherein, TL represents low-frequency transmission parameter, and ZPL11, ZPL12, ZPL21, ZPL22 represent four elements of described low-frequency impedance parameter matrix respectively, and NPL represents the determinant numerical value of described low-frequency impedance parameter matrix.
Wherein in an embodiment, please continue to refer to Fig. 4, step S170, comprises or also comprises:
S175: according to described scattering parameter determination high-frequency resistance parameter matrix.
Particularly, the determination formula of described high-frequency resistance parameter matrix is:
ZPH=R* (E+S) * inv (E-S), R=[50,0; 0,50]; Wherein, ZPH represents described high-frequency resistance parameter matrix, and E representation unit matrix, S represents described scattering parameter, and inv represents matrix inversion.
S177: according to described high-frequency resistance parameter matrix, determine high-frequency transmission parameter; Described transformation parameter comprises or also comprises described high-frequency transmission parameter.
Particularly, the determination formula of described high-frequency transmission parameter is:
TH=[ZPH11/ZPH21, NPH/ZPH21; 1/ZPH21, ZPH22/ZPH21]; Wherein, TH represents described high-frequency transmission parameter, and ZPH11, ZPH12, ZPH21, ZPH22 represent four elements of described high-frequency resistance parameter matrix respectively, and NPH represents described high-frequency resistance parameter matrix determinant of a matrix numerical value.
As shown in Figure 5, the Two-port netwerk power equipment transformation parameter that a kind of with above-mentioned Two-port netwerk power equipment transformation parameter acquisition methods is corresponding obtains system, comprising:
Impedance parameter acquisition module 130, for obtaining the impedance parameter of Two-port netwerk power equipment in low-frequency range by electric impedance analyzer.
Electric impedance analyzer can the impedance parameter of Obtaining Accurate low-frequency range.
Scattering parameter acquisition module 150, for obtaining the scattering parameter of described Two-port netwerk power equipment at high band by network analyzer.
Network analyzer can the scattering parameter of Obtaining Accurate high band.
Transformation parameter determination module 170, for determining the transformation parameter of described Two-port netwerk power equipment according to described impedance parameter and described scattering parameter.
Low-frequency transmission parameter accurately can be determined by impedance parameter accurately.High-frequency transmission parameter accurately can be determined by scattering parameter accurately.Transformation parameter is the combination of low-frequency transmission parameter and high-frequency transmission parameter.
Above-mentioned Two-port netwerk power equipment transformation parameter obtains system, because impedance parameter acquisition module 130 can obtain the impedance parameter of low-frequency range by electric impedance analyzer, scattering parameter acquisition module 150 obtains the scattering parameter of high band by network analyzer, and transformation parameter determination module 170 is according to impedance parameter and scattering parameter determination transformation parameter, thus when solving the acquisition of power equipment transformation parameter, may occur that instrument test frequency can not cover or accurately can not obtain the problem of transformation parameter for the transformation parameter in low frequency situation, the transformation parameter of Two-port netwerk power equipment at low-frequency range and high band can be obtained exactly.
Refer to Fig. 6, wherein in an embodiment, also comprise:
Frequency acquisition module 110, for obtaining low-limit frequency, highest frequency and default intermediate frequency.
Wherein in an embodiment, described low-frequency range is the frequency range of described low-limit frequency to described default intermediate frequency; Described high band is the frequency range of described default intermediate frequency to described highest frequency.
In the present embodiment, default intermediate frequency is 500kHz.
Please continue to refer to Fig. 6, wherein in an embodiment, also comprise:
Module 120 selected by impedance instrument, for the electric impedance analyzer selecting frequency range to cover described low-frequency range.
So, ensure that electric impedance analyzer can obtain impedance parameter accurately.
Also comprise:
Lattice gauge selects module 140, for the network analyzer selecting frequency range to cover described high band.
So, ensure that network analyzer can obtain scattering parameter accurately.
Wherein in an embodiment, described impedance parameter comprises that first opens parameter, the first short parameter, second opens parameter and the second short parameter.
Refer to Fig. 7, impedance parameter acquisition module 130, comprising:
One opens parameter acquiring unit 131, and user is by first port of electric impedance analyzer from described Two-port netwerk power equipment, and when obtaining the second port open of described Two-port netwerk power equipment first opens parameter.
One short parameter acquiring unit 133, for by first port of electric impedance analyzer from described Two-port netwerk power equipment, obtains the first short parameter during the second port short circuit of described Two-port netwerk power equipment.
Two open parameter acquiring unit 135, and for by second port of electric impedance analyzer from described Two-port netwerk power equipment, when obtaining the first port open of described Two-port netwerk power equipment second opens parameter.
Two short parameter acquisition module 137, for by second port of electric impedance analyzer from described Two-port netwerk power equipment, obtain the second short parameter during the first port short circuit of described Two-port netwerk power equipment.
Further, refer to Fig. 8, described transformation parameter determination module 170, comprising:
Low-frequency impedance determining unit 171, for according to described first opening parameter, described first short parameter, described second opens parameter and described second short parameter determination low-frequency impedance parameter matrix.
Particularly, the determination formula of described low-frequency impedance parameter matrix is:
ZPL=[ZPL11, ZPL12; ZPL21, ZPL22]; ZPL11=Z1O, ZPL12=Z2O*Z1O-Z2S*Z1O, ZPL21=Z1O*Z2O-Z1S*Z2O, ZPL22=Z2O; Wherein, ZPL represents described low-frequency impedance matrix, and Z1O represents that described first opens parameter, and Z1S represents described first short parameter, and Z2O represents that described second opens parameter, and Z2S represents described second short parameter.
Low-frequency transmission determining unit 173, user is according to described low-frequency impedance parameter matrix determination low-frequency transmission parameter; Described transformation parameter comprises described low-frequency transmission parameter.
Particularly, the determination formula of described low-frequency transmission parameter is:
TL=[ZPL11/ZPL21, NPL/ZPL21; 1/ZPL21, ZPL22/ZPL21]; Wherein, TL represents low-frequency transmission parameter, and ZPL11, ZPL12, ZPL21, ZPL22 represent four elements of described low-frequency impedance parameter matrix respectively, and NPL represents the determinant numerical value of described low-frequency impedance parameter matrix.
Wherein in an embodiment, please continue to refer to Fig. 8, transformation parameter determination module 170, comprises or also comprises:
Low-frequency transmission determining unit 175, for according to described scattering parameter determination high-frequency resistance parameter matrix.
Particularly, the determination formula of described high-frequency resistance parameter matrix is:
ZPH=R* (E+S) * inv (E-S), R=[50,0; 0,50]; Wherein, ZPH represents described high-frequency resistance parameter matrix, and E representation unit matrix, S represents described scattering parameter, and inv represents matrix inversion.
High-frequency transmission determining unit 177, for according to described high-frequency resistance parameter matrix, determines high-frequency transmission parameter; Described transformation parameter comprises or also comprises described high-frequency transmission parameter.
Particularly, the determination formula of described high-frequency transmission parameter is:
TH=[ZPH11/ZPH21, NPH/ZPH21; 1/ZPH21, ZPH22/ZPH21]; Wherein, TH represents described high-frequency transmission parameter, and ZPH11, ZPH12, ZPH21, ZPH22 represent four elements of described high-frequency resistance parameter matrix respectively, and NPH represents described high-frequency resistance parameter matrix determinant of a matrix numerical value.
Above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make multiple distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a Two-port netwerk power equipment transformation parameter acquisition methods, is characterized in that, comprise step:
The impedance parameter of Two-port netwerk power equipment in low-frequency range is obtained by electric impedance analyzer;
The scattering parameter of described Two-port netwerk power equipment at high band is obtained by network analyzer;
The transformation parameter of described Two-port netwerk power equipment is determined according to described impedance parameter and described scattering parameter.
2. Two-port netwerk power equipment transformation parameter acquisition methods according to claim 1, it is characterized in that, described by the step of electric impedance analyzer acquisition Two-port netwerk power equipment at the impedance parameter of low-frequency range, and describedly obtained described Two-port netwerk power equipment before the step of the scattering parameter of high band by network analyzer, also comprise step:
Obtain low-limit frequency, highest frequency and default intermediate frequency;
Described low-frequency range is the frequency range of described low-limit frequency to described default intermediate frequency, and described high band is the frequency range of described default intermediate frequency to described highest frequency.
3. Two-port netwerk power equipment transformation parameter acquisition methods according to claim 1, is characterized in that, describedly obtains Two-port netwerk power equipment before the step of the impedance parameter of low-frequency range by electric impedance analyzer, also comprises step:
Frequency range is selected to cover the electric impedance analyzer of described low-frequency range;
Describedly obtain described Two-port netwerk power equipment before the step of the scattering parameter of high band by network analyzer, also comprise step:
Frequency range is selected to cover the network analyzer of described high band.
4. Two-port netwerk power equipment transformation parameter acquisition methods according to claim 1, is characterized in that, described impedance parameter comprises that first opens parameter, the first short parameter, second opens parameter and the second short parameter;
Describedly obtain Two-port netwerk power equipment in the step of the impedance parameter of low-frequency range by electric impedance analyzer, comprising:
By first port of electric impedance analyzer from described Two-port netwerk power equipment, when obtaining the second port open of described Two-port netwerk power equipment described first opens parameter;
By first port of electric impedance analyzer from described Two-port netwerk power equipment, obtain described first short parameter during the second port short circuit of described Two-port netwerk power equipment;
By second port of electric impedance analyzer from described Two-port netwerk power equipment, when obtaining the first port open of described Two-port netwerk power equipment described second opens parameter;
By second port of electric impedance analyzer from described Two-port netwerk power equipment, obtain described second short parameter during the first port short circuit of described Two-port netwerk power equipment.
5. Two-port netwerk power equipment transformation parameter acquisition methods according to claim 4, is characterized in that, the described step determining the transformation parameter of described Two-port netwerk power equipment according to described impedance parameter and described scattering parameter, comprising:
According to described first opening parameter, described first short parameter, described second opens parameter and described second short parameter determination low-frequency impedance parameter matrix;
According to described low-frequency impedance parameter matrix determination low-frequency transmission parameter; Described transformation parameter comprises described low-frequency transmission parameter.
6. Two-port netwerk power equipment transformation parameter acquisition methods according to claim 5, it is characterized in that, the determination formula of described low-frequency transmission parameter is:
TL=[ZPL11/ZPL21, NPL/ZPL21; 1/ZPL21, ZPL22/ZPL21]; Wherein, TL represents low-frequency transmission parameter, and ZPL11, ZPL12, ZPL21, ZPL22 represent four elements of described low-frequency impedance parameter matrix respectively, and NPL represents the determinant numerical value of described low-frequency impedance parameter matrix;
The determination formula of described low-frequency impedance parameter matrix is:
ZPL=[ZPL11, ZPL12; ZPL21, ZPL22]; ZPL11=Z1O, ZPL12=Z2O*Z1O-Z2S*Z1O, ZPL21=Z1O*Z2O-Z1S*Z2O, ZPL22=Z2O; Wherein, ZPL represents described low-frequency impedance matrix, and Z1O represents that described first opens parameter, and Z1S represents described first short parameter, and Z2O represents that described second opens parameter, and Z2S represents described second short parameter.
7. Two-port netwerk power equipment transformation parameter acquisition methods according to claim 5, is characterized in that, the described step determining the transformation parameter of described Two-port netwerk power equipment according to described impedance parameter and described scattering parameter, also comprises:
According to described scattering parameter determination high-frequency resistance parameter matrix;
According to described high-frequency resistance parameter matrix, determine high-frequency transmission parameter; Described transformation parameter also comprises described high-frequency transmission parameter.
8. Two-port netwerk power equipment transformation parameter acquisition methods according to claim 1, is characterized in that, the described step determining the transformation parameter of described Two-port netwerk power equipment according to described impedance parameter and described scattering parameter, comprising:
According to described scattering parameter determination high-frequency resistance parameter matrix;
According to described high-frequency resistance parameter matrix, determine high-frequency transmission parameter; Described transformation parameter comprises described high-frequency transmission parameter.
9. the Two-port netwerk power equipment transformation parameter acquisition methods according to claim 7 or 8 any one, it is characterized in that, the determination formula of described high-frequency transmission parameter is:
TH=[ZPH11/ZPH21, NPH/ZPH21; 1/ZPH21, ZPH22/ZPH21]; Wherein, TH represents described high-frequency transmission parameter, and ZPH11, ZPH12, ZPH21, ZPH22 represent four elements of described high-frequency resistance parameter matrix respectively, and NPH represents described high-frequency resistance parameter matrix determinant of a matrix numerical value;
The determination formula of described high-frequency resistance parameter matrix is:
ZPH=R* (E+S) * inv (E-S), R=[50,0; 0,50]; Wherein, ZPH represents described high-frequency resistance parameter matrix, and E representation unit matrix, S represents described scattering parameter, and inv represents matrix inversion.
10. the Two-port netwerk power equipment transformation parameter corresponding with the Two-port netwerk power equipment transformation parameter acquisition methods described in claim 1-9 any one obtains a system, it is characterized in that, comprising:
Impedance parameter acquisition module, for obtaining the impedance parameter of Two-port netwerk power equipment in low-frequency range by electric impedance analyzer;
Scattering parameter acquisition module, for obtaining the scattering parameter of described Two-port netwerk power equipment at high band by network analyzer;
Transformation parameter determination module, for determining the transformation parameter of described Two-port netwerk power equipment according to described impedance parameter and described scattering parameter.
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