CN107766625A - A kind of transmission line of electricity non-contact voltage transducer waveform decoupling method - Google Patents
A kind of transmission line of electricity non-contact voltage transducer waveform decoupling method Download PDFInfo
- Publication number
- CN107766625A CN107766625A CN201710897578.5A CN201710897578A CN107766625A CN 107766625 A CN107766625 A CN 107766625A CN 201710897578 A CN201710897578 A CN 201710897578A CN 107766625 A CN107766625 A CN 107766625A
- Authority
- CN
- China
- Prior art keywords
- msub
- mrow
- mtd
- mtr
- msubsup
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The invention discloses a kind of transmission line of electricity non-contact voltage transducer waveform decoupling method, pass through the model of power transmission system that builds non-contact voltage transducer structure He will measure, under given magnitude of voltage, the voltage on sensing metallic plate is tried to achieve, determines low-voltage arm capacitance module electric capacity.Again voltage is measured by the way that non-contact voltage transducer is placed in below transmission line of electricity, coefficient is influenceed using Solving Nonlinear Equation, the corresponding instantaneous voltage value in the case where distinguishing corresponding record by 3 time points in a sinusoidal voltage cycle, is changed by matrix to try to achieve the actual voltage value of transmission line of electricity afterwards.Non-contact voltage transducer is eliminated in the measurements, the problem of being interfered between transmission line of electricity three-phase, so as to by gathering the virtual voltage waveform on waveform inverse uniline.
Description
Technical field
The invention belongs to over-voltage measurement technical field, and in particular to a kind of transmission line of electricity non-contact voltage transducer ripple
Shape decoupling method.
Background technology
Operating experience shows, is to threaten electricity as the overvoltage impact caused by the electro-magnetic transient transient process such as being struck by lightning, operating
An important factor for host's apparatus insulated safe operation.Therefore, the real-time monitoring to line voltage and overvoltage helps to obtain in real time
The overall operation state of power taking Force system, the conjunction of power network resources is realized so as to combine optimization energy management strategy and control strategy
Reason distribution, while the timely protection and control for realizing electric power system fault can be coordinated with relay protection and automatic control equipment.
Contactless overvoltage sensor have small volume, it is in light weight, directly contact and measure not with power system high-tension apparatus it is existing
The advantages that field is passive, so being widely used in 110kV and above power system on-line monitoring.
However, when constructed voltage measurement system is applied in actual three-phase voltage measurement, front end sensors can not
Avoid can be by except by other adjacent phase line voltage coupling influences in addition to the phase of side, so as to influence the voltage data of measurement
Accuracy.Therefore, it is necessary to a kind of rationally effective method, by measured result, other phase lines and bypass wire are removed
Influence, and then inverse obtains the virtual voltage on circuit.
The content of the invention
In view of this, the invention provides a kind of transmission line of electricity non-contact voltage transducer waveform decoupling method, utilize
Induced voltage is obtained when noncontacting proximity sensor measurement power system A phases, B phases and C phase transmission line of electricity voltages, is calculated each mutually defeated
Influence coefficient of the electric line voltage to three noncontacting proximity sensors.And tectonic decoupling matrix, obtain the reality of three phase line
Voltage waveform.
The technological means that the present invention uses is as follows：
A kind of transmission line of electricity non-contact voltage transducer waveform decoupling method, it specifically includes following steps：
S1. non-contact voltage transducer structural model is built；
S2. the model of power transmission system that will be measured is built, gives transmission line of electricity voltage U；
S3. the stray capacitance between non-contact voltage transducer and transmission line of electricity is calculated respectively using finite element algorithm
C1；
S4. according to the operation principle of non-contact voltage transducer, in sensing gold when non-contact voltage transducer works
Category plate on voltage u be：
In formula, C2For non-contact voltage transducer low-voltage arm electric capacity；
In stray capacitance C1Size and sensing metallic plate it is relevant with the distance between overhead transmission line, so reasonable selection sense
Answer the distance between metallic plate and overhead transmission line and noncontacting proximity sensor low-voltage arm capacitance C2So that contactless voltage
The output voltage of sensor is just in 0-10V, so as to be convenient for measuring；
S5. three non-contact voltage transducer structural models, respectively the first non-contact voltage transducer, the are set
Two non-contact voltage transducers and the 3rd non-contact voltage transducer, set three model of power transmission system, respectively A
Phase, B phases and C phases, it is respectively that the first non-contact voltage transducer, the second non-contact voltage transducer and the 3rd is non-contact
Formula voltage sensor is correspondingly placed at the lower section of power system A phases, B phases and C phase transmission lines of electricity；
S6. when acquisition system works, the first non-contact voltage transducer, the second non-contact voltage transducer and
3rd non-contact voltage transducer measures voltage V respectivelys1、Vs2And Vs3It is as follows：
Wherein, V1、V2And V3The respectively virtual voltage of power system A phases, B phases and C phase transmission lines of electricity, k11、k12And
k13The respectively influence coefficient of A phases, B phases and C phases transmission line of electricity to the first non-contact voltage transducer；k21、k22、k23Respectively
For the influence coefficient of A phases, B phases and C phases transmission line of electricity to the second non-contact voltage transducer；k31、k32And k33Respectively A
The influence coefficient of phase, B phases and C phases transmission line of electricity to the 3rd non-contact voltage transducer；
S7. the k in above-mentioned equation is solved11、k12、k13、k21、k22、k23、k31、k32And k33Value, in above-mentioned equation group
Take any equation：
VsmThe voltage obtained for m (m=1,2,3) individual non-contact voltage transducer measurement, V1 m、 Respectively
The instantaneous voltage obtained with voltage measuring transformer transmission line of electricity A phase, B phase, C phase, to solve k in above formulam1、km2And km3
Numerical value, at least need the equation groups of 3 linear independences, 3 time points in a sinusoidal voltage cycle correspond to note respectively
The lower V of recordsmAnd V1 m、Value, each time point can list an equation, on 3 time points, can obtain 3
On km1、km2、km3Equation group because sinusoidal voltage is non-linear, and V1、V2And V3There are phase difference, therefore below equation
Group is linear independence equation group：
K i.e. can obtain to above-mentioned solving equationsm1、km2、km3, similarly, all k values can be obtained；
S8. the k values tried to achieve according to S7, a matrix A is constructed：
The accounting equation of k values in S6, by converting relationship below：
S9：Above-mentioned matrix A is taken inverse, obtain decoupling matrices B, B=A-1, the relational expression for converting S8 obtains relationship below：
S10. decoupling matrices are utilized, by the first non-contact voltage transducer, the second non-contact voltage transducer and
Obtained voltage V is measured on 3rd non-contact voltage transducers1、Vs2And Vs3Above formula is substituted into, solves power system A phases, B phases
With the virtual voltage V of C phase transmission lines of electricity1、V2And V3Value.
Using a kind of transmission line of electricity non-contact voltage transducer waveform decoupling method provided by the present invention, with existing skill
Art compares, and has following significant advantage：
(1) voltage decoupling method proposed by the present invention, eliminates non-contact voltage transducer in the measurements, transmission line of electricity
The problem of being interfered between three-phase, so as to by gathering the virtual voltage waveform on waveform inverse uniline；
(2) the voltage decoupling method that invention proposes, that is, be suitable for debugging, the voltage measurement during experiment can also
All-mains long-term on-line monitoring；
(3) voltage decoupling method proposed by the present invention so that when voltage measurement is carried out in real process, sensor is placed
Position can be relatively flexible, adjustment angle of having no way prevents the electromagnetic interference of other phase transmission lines of electricity.
Brief description of the drawings
Fig. 1 is coupling influence schematic diagram of the side circuit to the first non-contact voltage transducer of the present invention；
In figure：Metal tablet 1；The low-voltage arm electric capacity C of first non-contact voltage transducer1a；A phases transmission line of electricity is to
The coupled capacitor C of one non-contact voltage transducerAa；Coupling electricity of the B phases transmission line of electricity to the first non-contact voltage transducer
Hold CBa；Coupled capacitor C of the C phases transmission line of electricity to the first non-contact voltage transducerCa
Embodiment
The principles and features of the present invention are described below, and illustrated embodiment is served only for explaining the present invention, is not intended to
Limit the scope of the present invention.
A kind of transmission line of electricity non-contact voltage transducer waveform decoupling method as shown in Figure 1, it specifically includes following
Step：
S1. non-contact voltage transducer structural model is built；
S2. the model of power transmission system that will be measured is built, gives transmission line of electricity voltage U；
S3. the stray capacitance between non-contact voltage transducer and transmission line of electricity is calculated respectively using finite element algorithm
C1；
S4. according to the operation principle of non-contact voltage transducer, in sensing gold when non-contact voltage transducer works
Category plate on voltage u be：
In formula, C2For non-contact voltage transducer low-voltage arm electric capacity；
Due to stray capacitance C1Size and sensing metallic plate it is relevant with the distance between overhead transmission line, so reasonable selection
Sense the distance between metallic plate and overhead transmission line and noncontacting proximity sensor low-voltage arm capacitance C2So that contactless electricity
The output voltage of pressure sensor is just in 0-10V, so as to be convenient for measuring；
S5. three non-contact voltage transducer structural models, respectively the first non-contact voltage transducer, the are set
Two non-contact voltage transducers and the 3rd non-contact voltage transducer, set three model of power transmission system, respectively A
Phase, B phases and C phases, it is respectively that the first non-contact voltage transducer, the second non-contact voltage transducer and the 3rd is non-contact
Formula voltage sensor is correspondingly placed at the lower section of power system A phases, B phases and C phase transmission lines of electricity, it is contemplated that on-site actual situations,
So it is to be easy for installation, support meanss can be utilized, be installed at certain altitude；
S6. when acquisition system works, the first non-contact voltage transducer, the second non-contact voltage transducer and
3rd non-contact voltage transducer measures voltage V respectivelys1、Vs2And Vs3It is as follows：
Wherein, the induced voltage that each non-contact voltage transducer measures, all it is coupling caused by transmission line of electricity three-phase
Close voltage, voltage Vs1、Vs2And Vs3It is coupled voltages, V1、V2And V3Respectively power system A phases, B phases and C phase transmission lines of electricity
Virtual voltage, k11、k12And k13The respectively shadow of A phases, B phases and C phases transmission line of electricity to the first non-contact voltage transducer
Ring coefficient；k21、k22、k23The respectively influence coefficient of A phases, B phases and C phases transmission line of electricity to the second non-contact voltage transducer；
k31、k32And k33The respectively influence coefficient of A phases, B phases and C phases transmission line of electricity to the 3rd non-contact voltage transducer；
S7. in order to obtain transmission line of electricity voltage, except the voltage that non-contact voltage transducer measurement obtains presses Vs1、Vs2
And Vs3, it is also necessary to solve the k in above-mentioned equation11、k12、k13、k21、k22、k23、k31、k32And k33Value, in above-mentioned S6 equation groups
In take any equation：
VsmThe voltage obtained for m (m=1,2,3) individual non-contact voltage transducer measurement, V1 m、 Respectively
The instantaneous voltage obtained with voltage measuring transformer transmission line of electricity A phase, B phase, C phase, to solve k in above formulam1、km2And km3
Numerical value, at least need the equation groups of 3 linear independences, 3 time points in a sinusoidal voltage cycle correspond to note respectively
The lower V of recordsmAnd V1 m、Value, each time point can list an equation, on 3 time points, can obtain 3
On km1、km2、km3Equation group because sinusoidal voltage is non-linear, and V1 m、There is phase difference, therefore with lower section
Journey group is linear independence equation group：
In formula,V1 1、The voltage accordingly measured for first time point,V1 2、 For second
The voltage that individual time point accordingly measures,V1 3、The voltage accordingly measured for the 3rd time point；
K i.e. can obtain to above-mentioned solving equationsm1、km2、km3, similarly, all k values can be obtained；
S8. the k values tried to achieve according to S7, a matrix A is constructed：
The accounting equation of k values in S6, by converting relationship below：
S9：Above-mentioned matrix A is taken inverse, obtain decoupling matrices B, B=A-1, the relational expression for converting S8 obtains relationship below：
S10. decoupling matrices are utilized, by the first non-contact voltage transducer, the second non-contact voltage transducer and
Obtained voltage V is measured on 3rd non-contact voltage transducers1、Vs2And Vs3Above formula is substituted into, solves power system A phases, B phases
With the virtual voltage V of C phase transmission lines of electricity1、V2And V3Value.
In summary, using a kind of transmission line of electricity non-contact voltage transducer waveform decoupling side provided by the present invention
Method, have following significant progressive：
(1) voltage decoupling method proposed by the present invention, eliminates non-contact voltage transducer in the measurements, transmission line of electricity
The problem of being interfered between three-phase, so as to by gathering the virtual voltage waveform on waveform inverse uniline；
(2) the voltage decoupling method that invention proposes, that is, be suitable for debugging, the voltage measurement during experiment can also
All-mains long-term on-line monitoring；
(3) voltage decoupling method proposed by the present invention so that when voltage measurement is carried out in real process, sensor is placed
Position can be relatively flexible, adjustment angle of having no way prevents the electromagnetic interference of other phase transmission lines of electricity.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements done etc., should be included within the scope of protection of the invention with principle.
Claims (1)
1. a kind of transmission line of electricity non-contact voltage transducer waveform decoupling method, it is characterised in that it specifically includes following step
Suddenly：
S1. non-contact voltage transducer structural model is built；
S2. the model of power transmission system that will be measured is built, gives transmission line of electricity voltage U；
S3. the stray capacitance C between non-contact voltage transducer and transmission line of electricity is calculated respectively using finite element algorithm1；
S4. according to the operation principle of non-contact voltage transducer, in sensing metallic plate when non-contact voltage transducer works
On voltage u be：
<mrow>
<mi>u</mi>
<mo>=</mo>
<mfrac>
<msub>
<mi>C</mi>
<mn>1</mn>
</msub>
<mrow>
<msub>
<mi>C</mi>
<mn>1</mn>
</msub>
<mo>+</mo>
<msub>
<mi>C</mi>
<mn>2</mn>
</msub>
</mrow>
</mfrac>
<mi>U</mi>
</mrow>
In formula, C2For non-contact voltage transducer low-voltage arm electric capacity；
In stray capacitance C1Size and sensing metallic plate it is relevant with the distance between overhead transmission line, so reasonable selection sensing is golden
Belong to the distance between plate and overhead transmission line and noncontacting proximity sensor low-voltage arm capacitance C2So that contactless voltage sensor
The output voltage of device is just in 0-10V, so as to be convenient for measuring；
S5. three non-contact voltage transducer structural models are set, it is respectively the first non-contact voltage transducer, second non-
Contact voltage sensor and the 3rd non-contact voltage transducer, set three model of power transmission system, respectively A phases, B phases
With C phases, respectively by the first non-contact voltage transducer, the second non-contact voltage transducer and the 3rd contactless voltage
Sensor is correspondingly placed at the lower section of power system A phases, B phases and C phase transmission lines of electricity；
S6. when acquisition system works, the first non-contact voltage transducer, the second non-contact voltage transducer and the 3rd
Non-contact voltage transducer measures voltage V respectivelys1、Vs2And Vs3It is as follows：
<mfenced open = "{" close = "">
<mtable>
<mtr>
<mtd>
<mrow>
<msub>
<mi>V</mi>
<mrow>
<mi>s</mi>
<mn>1</mn>
</mrow>
</msub>
<mo>=</mo>
<msub>
<mi>k</mi>
<mn>11</mn>
</msub>
<msub>
<mi>V</mi>
<mn>1</mn>
</msub>
<mo>+</mo>
<msub>
<mi>k</mi>
<mn>12</mn>
</msub>
<msub>
<mi>V</mi>
<mn>2</mn>
</msub>
<mo>+</mo>
<msub>
<mi>k</mi>
<mn>13</mn>
</msub>
<msub>
<mi>V</mi>
<mn>3</mn>
</msub>
</mrow>
</mtd>
</mtr>
<mtr>
<mtd>
<mrow>
<msub>
<mi>V</mi>
<mrow>
<mi>s</mi>
<mn>2</mn>
</mrow>
</msub>
<mo>=</mo>
<msub>
<mi>k</mi>
<mn>21</mn>
</msub>
<msub>
<mi>V</mi>
<mn>1</mn>
</msub>
<mo>+</mo>
<msub>
<mi>k</mi>
<mn>22</mn>
</msub>
<msub>
<mi>V</mi>
<mn>2</mn>
</msub>
<mo>+</mo>
<msub>
<mi>k</mi>
<mn>23</mn>
</msub>
<msub>
<mi>V</mi>
<mn>3</mn>
</msub>
</mrow>
</mtd>
</mtr>
<mtr>
<mtd>
<mrow>
<msub>
<mi>V</mi>
<mrow>
<mi>s</mi>
<mn>3</mn>
</mrow>
</msub>
<mo>=</mo>
<msub>
<mi>k</mi>
<mn>31</mn>
</msub>
<msub>
<mi>V</mi>
<mn>1</mn>
</msub>
<mo>+</mo>
<msub>
<mi>k</mi>
<mn>32</mn>
</msub>
<msub>
<mi>V</mi>
<mn>2</mn>
</msub>
<mo>+</mo>
<msub>
<mi>k</mi>
<mn>33</mn>
</msub>
<msub>
<mi>V</mi>
<mn>3</mn>
</msub>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
Wherein, V1、V2And V3The respectively virtual voltage of power system A phases, B phases and C phase transmission lines of electricity, k11、k12And k13Point
Wei not the influence coefficient of A phases, B phases and C phases transmission line of electricity to the first non-contact voltage transducer；k21、k22、k23Respectively A
The influence coefficient of phase, B phases and C phases transmission line of electricity to the second non-contact voltage transducer；k31、k32And k33Respectively A phases, B
The mutually influence coefficient with C phases transmission line of electricity to the 3rd non-contact voltage transducer；
S7. the k in above-mentioned equation is solved11、k12、k13、k21、k22、k23、k31、k32And k33Value, take and appoint in above-mentioned equation group
One equation：
<mrow>
<msub>
<mi>V</mi>
<mrow>
<mi>s</mi>
<mi>m</mi>
</mrow>
</msub>
<mo>=</mo>
<msub>
<mi>k</mi>
<mrow>
<mi>m</mi>
<mn>1</mn>
</mrow>
</msub>
<msubsup>
<mi>V</mi>
<mn>1</mn>
<mi>m</mi>
</msubsup>
<mo>+</mo>
<msub>
<mi>k</mi>
<mrow>
<mi>m</mi>
<mn>2</mn>
</mrow>
</msub>
<msubsup>
<mi>V</mi>
<mn>2</mn>
<mi>m</mi>
</msubsup>
<mo>+</mo>
<msub>
<mi>k</mi>
<mrow>
<mi>m</mi>
<mn>3</mn>
</mrow>
</msub>
<msubsup>
<mi>V</mi>
<mn>3</mn>
<mi>m</mi>
</msubsup>
</mrow>
VsmThe voltage obtained for m (m=1,2,3) individual non-contact voltage transducer measurement, V1 m、V3 mRespectively electricity consumption
The instantaneous voltage that pressure transformer measurement transmission line of electricity A phase, B phase, C phase obtains, to solve k in above formulam1、km2And km3Number
Value, at least needs 3 linear independencesEquation group, in a sinusoidal voltage cycle 3 time points difference corresponding record
Lower VsmAnd V1 m、、V3 mValue, each time point can list an equation, on 3 time points, can obtain 3 on km1、
km2、km3Equation group because sinusoidal voltage is non-linear, and V1 m、V3 mThere is phase difference, therefore below equation group is linear
Unrelated equation group：
<mfenced open = "{" close = "">
<mtable>
<mtr>
<mtd>
<mrow>
<msubsup>
<mi>V</mi>
<mrow>
<mi>s</mi>
<mi>m</mi>
</mrow>
<mn>1</mn>
</msubsup>
<mo>=</mo>
<msub>
<mi>k</mi>
<mrow>
<mi>m</mi>
<mn>1</mn>
</mrow>
</msub>
<msubsup>
<mi>V</mi>
<mn>1</mn>
<mn>1</mn>
</msubsup>
<mo>+</mo>
<msub>
<mi>k</mi>
<mrow>
<mi>m</mi>
<mn>2</mn>
</mrow>
</msub>
<msubsup>
<mi>V</mi>
<mn>2</mn>
<mn>1</mn>
</msubsup>
<mo>+</mo>
<msub>
<mi>k</mi>
<mrow>
<mi>m</mi>
<mn>3</mn>
</mrow>
</msub>
<msubsup>
<mi>V</mi>
<mn>3</mn>
<mn>1</mn>
</msubsup>
</mrow>
</mtd>
</mtr>
<mtr>
<mtd>
<mrow>
<msubsup>
<mi>V</mi>
<mrow>
<mi>s</mi>
<mi>m</mi>
</mrow>
<mn>2</mn>
</msubsup>
<mo>=</mo>
<msub>
<mi>k</mi>
<mrow>
<mi>m</mi>
<mn>1</mn>
</mrow>
</msub>
<msubsup>
<mi>V</mi>
<mn>1</mn>
<mn>2</mn>
</msubsup>
<mo>+</mo>
<msub>
<mi>k</mi>
<mrow>
<mi>m</mi>
<mn>2</mn>
</mrow>
</msub>
<msubsup>
<mi>V</mi>
<mn>2</mn>
<mn>2</mn>
</msubsup>
<mo>+</mo>
<msub>
<mi>k</mi>
<mrow>
<mi>m</mi>
<mn>3</mn>
</mrow>
</msub>
<msubsup>
<mi>V</mi>
<mn>3</mn>
<mn>2</mn>
</msubsup>
</mrow>
</mtd>
</mtr>
<mtr>
<mtd>
<mrow>
<msubsup>
<mi>V</mi>
<mrow>
<mi>s</mi>
<mi>m</mi>
</mrow>
<mn>3</mn>
</msubsup>
<mo>=</mo>
<msub>
<mi>k</mi>
<mrow>
<mi>m</mi>
<mn>1</mn>
</mrow>
</msub>
<msubsup>
<mi>V</mi>
<mn>1</mn>
<mn>3</mn>
</msubsup>
<mo>+</mo>
<msub>
<mi>k</mi>
<mrow>
<mi>m</mi>
<mn>2</mn>
</mrow>
</msub>
<msubsup>
<mi>V</mi>
<mn>2</mn>
<mn>3</mn>
</msubsup>
<mo>+</mo>
<msub>
<mi>k</mi>
<mrow>
<mi>m</mi>
<mn>3</mn>
</mrow>
</msub>
<msubsup>
<mi>V</mi>
<mn>3</mn>
<mn>3</mn>
</msubsup>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
K i.e. can obtain to above-mentioned solving equationsm1、km2、km3, similarly, all k values can be obtained；
S8. the k values tried to achieve according to S7, a matrix A is constructed：
<mrow>
<mi>A</mi>
<mo>=</mo>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<msub>
<mi>k</mi>
<mn>11</mn>
</msub>
</mtd>
<mtd>
<msub>
<mi>k</mi>
<mn>12</mn>
</msub>
</mtd>
<mtd>
<msub>
<mi>k</mi>
<mn>13</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>k</mi>
<mn>21</mn>
</msub>
</mtd>
<mtd>
<msub>
<mi>k</mi>
<mn>22</mn>
</msub>
</mtd>
<mtd>
<msub>
<mi>k</mi>
<mn>32</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>k</mi>
<mn>31</mn>
</msub>
</mtd>
<mtd>
<msub>
<mi>k</mi>
<mn>32</mn>
</msub>
</mtd>
<mtd>
<msub>
<mi>k</mi>
<mn>33</mn>
</msub>
</mtd>
</mtr>
</mtable>
</mfenced>
</mrow>
The accounting equation of k values in S6, by converting relationship below：
<mrow>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<msub>
<mi>V</mi>
<mrow>
<mi>s</mi>
<mn>1</mn>
</mrow>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>V</mi>
<mrow>
<mi>s</mi>
<mn>2</mn>
</mrow>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>V</mi>
<mrow>
<mi>s</mi>
<mn>3</mn>
</mrow>
</msub>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>=</mo>
<mi>A</mi>
<mo>&CenterDot;</mo>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<msub>
<mi>V</mi>
<mn>1</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>V</mi>
<mn>2</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>V</mi>
<mn>3</mn>
</msub>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>;</mo>
</mrow>
S9：Above-mentioned matrix A is taken inverse, obtain decoupling matrices B, B=A-1, the relational expression for converting S8 obtains relationship below：
<mrow>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<msub>
<mi>V</mi>
<mn>1</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>V</mi>
<mn>2</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>V</mi>
<mn>3</mn>
</msub>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>=</mo>
<mi>B</mi>
<mo>&CenterDot;</mo>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<msub>
<mi>V</mi>
<mrow>
<mi>s</mi>
<mn>1</mn>
</mrow>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>V</mi>
<mrow>
<mi>s</mi>
<mn>2</mn>
</mrow>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>V</mi>
<mrow>
<mi>s</mi>
<mn>3</mn>
</mrow>
</msub>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>;</mo>
</mrow>
S10. decoupling matrices are utilized, by the first non-contact voltage transducer, the second non-contact voltage transducer and the 3rd
Obtained voltage V is measured on non-contact voltage transducers1、Vs2And Vs3Above formula is substituted into, solves power system A phases, B phases and C phases
The virtual voltage V of transmission line of electricity1、V2And V3Value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710897578.5A CN107766625A (en) | 2017-09-28 | 2017-09-28 | A kind of transmission line of electricity non-contact voltage transducer waveform decoupling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710897578.5A CN107766625A (en) | 2017-09-28 | 2017-09-28 | A kind of transmission line of electricity non-contact voltage transducer waveform decoupling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107766625A true CN107766625A (en) | 2018-03-06 |
Family
ID=61267727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710897578.5A Pending CN107766625A (en) | 2017-09-28 | 2017-09-28 | A kind of transmission line of electricity non-contact voltage transducer waveform decoupling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107766625A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111257813A (en) * | 2020-03-02 | 2020-06-09 | 国网江苏省电力有限公司电力科学研究院 | Non-contact voltage measurement system field calibration method and calibration device thereof |
| CN113359079A (en) * | 2021-05-31 | 2021-09-07 | 广西电网有限责任公司电力科学研究院 | Non-contact voltage sensor calibration method and system |
| CN114924112A (en) * | 2022-07-22 | 2022-08-19 | 中国电力科学研究院有限公司 | Decoupling method, system and medium for non-contact three-phase overvoltage measurement waveform |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013024244A1 (en) * | 2011-08-18 | 2013-02-21 | Ultra Electronics Limited | Method and apparatus for measurement of a dc voltage |
| CN104849535A (en) * | 2015-05-29 | 2015-08-19 | 清华大学 | Method for decoupling three-phase overvoltage measurement waveform by utilizing overvoltage waveform jump |
-
2017
- 2017-09-28 CN CN201710897578.5A patent/CN107766625A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013024244A1 (en) * | 2011-08-18 | 2013-02-21 | Ultra Electronics Limited | Method and apparatus for measurement of a dc voltage |
| CN104849535A (en) * | 2015-05-29 | 2015-08-19 | 清华大学 | Method for decoupling three-phase overvoltage measurement waveform by utilizing overvoltage waveform jump |
Non-Patent Citations (2)
| Title |
|---|
| 杜林，杨勇，常阿飞，李立浧: "《输电线路过电压传感器波形解耦及影响其测量精度的相关因素》", 《高压电技术》 * |
| 杜林等: "《一种非接触式架空输电线路过电压传感器》", 《电力系统自动化》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111257813A (en) * | 2020-03-02 | 2020-06-09 | 国网江苏省电力有限公司电力科学研究院 | Non-contact voltage measurement system field calibration method and calibration device thereof |
| CN113359079A (en) * | 2021-05-31 | 2021-09-07 | 广西电网有限责任公司电力科学研究院 | Non-contact voltage sensor calibration method and system |
| CN114924112A (en) * | 2022-07-22 | 2022-08-19 | 中国电力科学研究院有限公司 | Decoupling method, system and medium for non-contact three-phase overvoltage measurement waveform |
| CN114924112B (en) * | 2022-07-22 | 2022-10-04 | 中国电力科学研究院有限公司 | Decoupling method, system and medium for non-contact three-phase overvoltage measurement waveform |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Li et al. | Research on a composite voltage and current measurement device for HVDC networks | |
| CN103412176B (en) | Real-time on-line monitoring sensor for current of alternating current-direct current arrester based on magnetoresistance | |
| CN101696990B (en) | Method for testing electricity of ultrahigh-voltage transmission line based on electric field measurement and system thereof | |
| CN101860080B (en) | Distribution network metering and protection integral device suspended at high-voltage side | |
| WO2015117304A1 (en) | System for online monitoring of zinc oxide arrester and method thereof | |
| CN100514075C (en) | DC electric filed detection method of insulator for high-voltage DC transmission line | |
| CN107766625A (en) | A kind of transmission line of electricity non-contact voltage transducer waveform decoupling method | |
| CN106771505B (en) | Single-phase overhead transmission line of electricity phase voltage method for self-calibrating based on series capacitance | |
| CN106771645A (en) | Capacitance type potential transformer dielectric loss and capacitance on-line monitoring method and monitoring system | |
| CN202994931U (en) | Lightning arrester state monitoring device based on wireless sensing technology | |
| CN104849535B (en) | Method for decoupling three-phase overvoltage measurement waveform by utilizing overvoltage waveform jump | |
| CN105137158A (en) | Power system temporary overvoltage monitoring system | |
| CN102818958B (en) | On-line monitoring method and on-line monitoring device for transformer substation parallel connection compensating capacitor group | |
| CN101893654A (en) | Method and system for measuring transient overvoltage of high voltage power network through distribution capacitance method | |
| CN108919158A (en) | The field calibration method of AC Substation transient voltage non-contact measurement apparatus | |
| CN102129018A (en) | Insulation online monitoring method for high-voltage capacitive equipment | |
| CN103645014A (en) | SF6 gas leakage rate detection method for GIS equipment | |
| CN104793132A (en) | Disconnecting switch contact state detection device and method based on electric field sensor | |
| CN106872866A (en) | The equal properties of flow test system of lightning arrester connected in parallel | |
| CN107064615A (en) | HVAC power transmission line voltage class measuring method, apparatus and system | |
| Xu et al. | Monitoring and analysis of electronic current transformer’s field operating errors | |
| CN111308162A (en) | Power distribution network operating voltage detection method based on electric field sensor | |
| CN207440180U (en) | A kind of high-voltage circuitbreaker comprehensive tester | |
| CN201697961U (en) | System for measuring transient over-voltage of high-voltage power grid by adopting distributed capacitance method | |
| CN203164360U (en) | Transformer device insulation online monitoring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180306 |