CN107015060A - Method and system for measuring alternating current resistance of power transmission conductor - Google Patents
Method and system for measuring alternating current resistance of power transmission conductor Download PDFInfo
- Publication number
- CN107015060A CN107015060A CN201710165738.7A CN201710165738A CN107015060A CN 107015060 A CN107015060 A CN 107015060A CN 201710165738 A CN201710165738 A CN 201710165738A CN 107015060 A CN107015060 A CN 107015060A
- Authority
- CN
- China
- Prior art keywords
- loop
- resistance
- voltage
- moment
- electric current
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 103
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000004020 conductor Substances 0.000 title abstract description 9
- 238000005259 measurement Methods 0.000 claims description 88
- 238000009499 grossing Methods 0.000 claims description 18
- 230000005611 electricity Effects 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 11
- 238000006467 substitution reaction Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000014509 gene expression Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004832 voltammetry Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/08—Measuring resistance by measuring both voltage and current
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention relates to a method and a system for measuring alternating current resistance of a power transmission conductor. The method comprises the following steps: respectively inputting alternating currents with different sizes to a loop formed by the transmission conductors to be tested; the loop is a loop of a parallel two-wire transmission line structure configured by two identical power transmission wires to be tested, and the loop can be equivalent to a series circuit of an alternating current resistor and an inductor under the condition of inputting alternating current; measuring the voltage drop and the current flowing through the loop under the condition of different alternating current input, and respectively establishing a loop voltage equation set corresponding to the loop at each measuring moment according to the measured voltage drop time sequence signal and the measured current time sequence signal, wherein each equation in the loop voltage equation set meets the kirchhoff voltage law; and simultaneously solving the loop voltage equation set to obtain equivalent alternating current resistance and inductance of the loop, and obtaining the alternating current resistance and the inductance of the unit length of the transmission conductor according to the equivalent alternating current resistance and the inductance of the loop and the length of the transmission conductor to be detected. The invention can accurately measure the alternating current resistance of the transmission conductor.
Description
Technical field
The present invention relates to field of measuring technique, the AC resistance measuring method of more particularly to a kind of transmission pressure and it is
System.
Background technology
Wire product numerous types, for the wire (such as aluminium Baogang, steel-cored aluminium strand) of composite, its AC resistance
In addition to kelvin effect and kindred effect influence, also influenceed by magnetic loss caused by steel core hysteresis, and (related to magnetic field intensity
And to current-carrying capacity) relevant.Therefore, determine that the factor that AC resistance is related to is more using computational methods, it is difficult to use a public affairs
Formula is expressed completely, so the general method using experiment actual measurement.
However, AC resistance experiment is influenceed larger by ambient conditions, extraneous factor interference is easily received, test result is accurate
Property difficult move ensure.The surface of such as some wires (such as aluminum stranded conductor) easily forms the oxide layer of densification, makes electrically to connect between single line
Touch the accuracy that bad or residing environment temperature is different, all measures influence.
The content of the invention
Based on this, the embodiments of the invention provide the AC resistance measuring method and system of transmission pressure, can accurately it survey
Measure the AC resistance of transmission pressure.
One aspect of the present invention provides the AC resistance measuring method of transmission pressure, including：
The loop constituted to transmission pressure to be measured inputs different size of alternating current respectively, and measurement is in the input of different alternating currents
In the case of the loop voltage drop and the electric current that flows through；The loop is putting down that two identical transmission pressures to be measured are configured to
The loop of capable two wires transmission line structure, and the loop can be equivalent to AC resistance and electricity in the case of input AC electricity
The series circuit of sense；
According to the clock signal of the clock signal of the voltage drop measured and electric current sets up each measurement moment respectively
Each equation in the corresponding loop-voltage equation group in loop, the loop-voltage equation group, which is satisfied by Kirchoff s voltage, to be determined
Rule；
To the loop-voltage equation group simultaneous solution, the loop equivalent AC resistance and inductance are obtained, according to institute
The length for stating the equivalent AC resistance in loop and inductance and transmission pressure to be measured draws the friendship of the transmission pressure unit length
Leakage resistance and inductance.
Another aspect of the present invention provides a kind of AC resistance measuring system of transmission pressure, including：
Power supply and acquisition module, the loop for being constituted to transmission pressure to be measured input different size of alternating current respectively,
The measurement voltage drop in the loop and the electric current flowed through under different alternating current input conditions；The loop is that two identicals are treated
Survey the loop for the parallel two wires transmission line structure that transmission pressure is configured to, and loop energy in the case of input AC electricity
Enough it is equivalent to the series circuit of AC resistance and inductance；
Loop equation builds module, the clock signal difference for the clock signal according to the voltage drop measured and electric current
Each equation set up in the corresponding loop-voltage equation group in loop described in each measurement moment, the loop-voltage equation group
It is satisfied by Kirchhoff's second law；
Module is solved, for the loop-voltage equation group simultaneous solution, obtaining the equivalent AC resistance in the loop
And inductance, show that the transmission of electricity is led according to the length of the equivalent AC resistance in the loop and inductance and transmission pressure to be measured
The AC resistance and inductance of line unit length.
The AC resistance measuring method and system of the transmission pressure provided based on above-described embodiment, in advance by two identicals
The loop for the parallel two wires transmission line structure that transmission pressure to be measured is configured to, different size is inputted by the first backward loop
Alternating current, and then it is different measurement moment measurements obtain under different alternating current input conditions, the voltage drop in the loop with
The electric current flowed through；Then the clock signal of voltage drop and the clock signal of electric current repeatedly measured according to priority is set up often respectively
The corresponding loop-voltage equation group in loop described in the individual measurement moment；Pass through the simultaneous solution to the loop-voltage equation group, energy
It is enough accurately to obtain the loop equivalent AC resistance and inductance, and then can accurately draw the friendship of the transmission pressure unit length
Leakage resistance and inductance.Influence of the transmission pressure external environment factor to measurement result accuracy is overcome, accuracy of measurement is high, and
And it is easy to utilize.
Brief description of the drawings
Fig. 1 is the indicative flowchart of the AC resistance measuring method of the transmission pressure of an embodiment；
Circuit diagram equivalent for the loop of the transmission pressure composition of an embodiment Fig. 2；
The phasor representation figure of the voltage/current signals in the loop that Fig. 3 is constituted for the transmission pressure of an embodiment；
Fig. 4 is the field survey figure of the AC resistance of an overhead power transmission conducting wire；
Fig. 5 is the schematic diagram of the AC resistance measuring system of the transmission pressure of an embodiment.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Fig. 1 is the indicative flowchart of the AC resistance measuring method of the transmission pressure of an embodiment；As shown in figure 1, this
The AC resistance measuring method of transmission pressure in embodiment includes step：
S11, the loop constituted to transmission pressure to be measured inputs different size of alternating current respectively, measures in different alternating currents
The voltage drop in the loop and the electric current flowed through under input condition；The loop is that two identical transmission pressures to be measured are configured to
Parallel two wires transmission line structure loop, and the loop input AC electricity in the case of can be equivalent to AC resistance
With the series circuit of inductance.
Preferably, the spacing in the loop between two transmission pressures is in setting range, such as in 1mm to 2000mm
In the range of, to reduce influence of the outer self-induction to measurement result.
In one embodiment, the adjustable high-power ac power of output current is used for the loop power supply, wherein exchanging
The output of power supply suspends, and can be grounded in any point of output lead.It is what transmission pressure to be measured was constituted with reference to shown in Fig. 2
The loop circuit diagram equivalent when input AC is electric, it is seen then that loop can be equivalent to an AC resistance and one in exchange
The series circuit of inductance.Wherein, CH1, CH2 and CH3 represent 1,2,3 passages of collector respectively, flow through the electric current in the loop
Voltage signal can be converted to by Zero flux high-current test system, for example, its conversion ratio can be 10V/30000A.Preferably,
Voltage drop and electric current can be gathered by 4 passage digital oscilloscopes.Need to measure loop voltage drop u can by passage 1 and passage 2 difference
It is worth to, electric current i can be obtained by passage 3 divided by above-mentioned conversion ratio.
In one embodiment, this two parallel transmission pressures are fixed on by a less spacing by fixator, by
This can reduce outer self-induction to the voltage drop of measurement or the influence of current signal, with reference to shown in Fig. 3, i ' in figureLRepresent two wires it
Between it is in larger distance when corresponding inductance current, iLCorresponding inductance current when distance reduces between expression two wires；i′RRepresent two wires
Between it is in larger distance when corresponding current in resistance property, iRCorresponding current in resistance property when distance reduces between expression two wires；I ' expressions two
Corresponding total current when in larger distance between line, i represents corresponding total current when distance reduces between two wires；U represents resistive electricity
Press signal.The two wires transfer wire being had a try for electric current one, corresponding outer self-induction LoIt is expressed as：
In formula, l is the length in loop, i.e., the length sum of two transmission pressures, D is the spacing of two transmission pressures, and R is
The radius of transmission pressure, uoFor the magnetic conductivity in vacuum, uo=4 π × 10-7H/m。
It can be seen that from formula, the spacing for constituting two transmission pressures in loop is smaller, and outer self-induction is smaller, this leads to accurate measurement
The AC resistance of line is favourable.Because the voltage signal of experiment includes resistive voltage signal and perceptual voltage signal, but need
Simply resistive voltage signal is used for calculating AC resistance.If perceptual voltage signal is much larger than resistive voltage signal, then resistive
The solution of voltage signal will be inaccurate, therefore by reducing outer self-induction perceptual voltage signal is reduced, and is conducive to improving and hands over
The accuracy of leakage resistance measurement.
S12, each measurement moment is set up according to the clock signal of the clock signal of the voltage drop measured and electric current respectively
Each equation in the corresponding loop-voltage equation group in the loop, the loop-voltage equation group is satisfied by kirchhoff electricity
Press law.
Often input and then measured with the voltage drop in loop this described and the electric current flowed through with this alternating current, it can thus be concluded that arriving voltage
The clock signal of drop and the clock signal of electric current, that is, the voltage drop in the loop and the electricity flowed through when obtaining inputting different alternating currents
Stream.
Kirchhoff's second law (Kirchhoff laws) is the basic law that voltage and current is followed in circuit, i.e.,
In any one closed-loop path, each section of ohmically voltage drop IR algebraical sum is equal to electromotive force E algebraical sum, i.e. ∑ IR=
∑E；When returning to this within one week around loop from a bit, each section of voltage U algebraical sum identically vanishing, i.e. ∑ U=0.
In a preferred embodiment, each measurement set up according to the clock signal of the voltage drop and the clock signal of electric current
The corresponding loop-voltage equation group in loop described in moment is：
Wherein, r represents the equivalent resistance value in the loop, and L represents the equivalent inductance value in the loop, and u represents to work as
The voltage drop in loop described in the preceding measurement moment, i represents the electric current that currently loop described in the measurement moment is flowed through.
S13, to the loop-voltage equation group simultaneous solution, obtains the loop equivalent AC resistance and inductance, root
The transmission pressure unit length is drawn according to the length of the equivalent AC resistance in the loop and inductance and transmission pressure to be measured
AC resistance and inductance.
In a preferred embodiment, using least square method to the loop-voltage equation group simultaneous solution.Least square
Method (also known as least squares method) is a kind of mathematical optimization techniques.It finds the optimal letter of data by minimizing the quadratic sum of error
Number matching.Unknown data can be easily tried to achieve using least square method, and cause these data and real data for trying to achieve
Between error quadratic sum for minimum.
In a preferred embodiment, step S13 embodiment may include：First by the loop-voltage equation group from
Processing is dissipated, then the voltage equation group after discrete processes is solved using least-squares estimation algorithm, the loop is obtained equivalent
AC resistance r and inductance L.Further, according to the conductor length measured in advance, it can obtain transmission pressure unit length to be measured
AC resistance and inductance.
The AC resistance measuring method and system of the transmission pressure provided based on above-described embodiment, in advance by two identicals
The loop for the parallel two wires transmission line structure that transmission pressure to be measured is configured to, different size is inputted by the first backward loop
Alternating current, and then it is different measurement moment measurements obtain under different alternating current input conditions, the voltage drop in the loop with
The electric current flowed through；Then the clock signal of voltage drop and the clock signal of electric current repeatedly measured according to priority is set up often respectively
The corresponding loop-voltage equation group in loop described in the individual measurement moment；Pass through the simultaneous solution to the loop-voltage equation group, energy
It is enough accurately to obtain the loop equivalent AC resistance and inductance, and then can accurately draw the friendship of the transmission pressure unit length
Leakage resistance and inductance.Influence of the transmission pressure external environment factor to measurement result accuracy is overcome, accuracy of measurement is high, and
And it is easy to utilize.
In one embodiment, the clock signal and stream of the voltage drop at two transmission pressure two ends are obtained in step S12 measurements
After the clock signal of overcurrent, the primary signal measured can be also smoothed, to suppress noise therein so that
The phase of signal before and after smoothing processing is consistent, and the phase difference of each measurement moment corresponding voltage drop and electric current is kept not
Become.Then, loop-voltage equation group is built based on the signal after smoothing processing, and then advantageously ensures that AC resistance test result
Accuracy.
Specifically, in one embodiment, can by by the voltage drop/electric current at each measurement moment with the measurement moment and its
Setting quantity measures the average value of the voltage drop/electric current at moment to substitute afterwards, reaches to enter the primary signal of measurement with this
The effect of row smoothing processing.For example：The clock signal at one measurement moment measures the moment with the moment and subsequent 1~200
The average value of clock signal substitute.
Preferably, the voltage drop/electric current at each measurement moment is smoothed using following smoothing formula：
Wherein, i represents currently to measure the current measurement moment letter of participation after moment, the current measurement moment that N represents setting
Number smoothing processing measurement the moment quantity, n represent measure moment n, and measurement moment n currently measurement the moment after, k
(n) measurement signal at measurement moment n is represented, k (i) represents the substitution value of current measurement time-ofday signals.
If setting N=100, then it represents that when the clock signal at a measurement moment is measured with the moment and subsequent 100
The average value of the clock signal at quarter is substituted.N value is bigger, and its smooth effect is better, but computation complexity is also higher, therefore can
Appropriate value is set according to actual conditions to N.
By the AC resistance measuring method of the transmission pressure of above-described embodiment, wire local environment temperature etc. is overcome outer
In influence of the environmental factor to measurement result accuracy, the AC resistance of transmission pressure can be quick and precisely measured, and just
In popularization and application.
It is the field survey figure of the AC resistance of an overhead power transmission conducting wire with reference to shown in Fig. 4 with reference to above-described embodiment.Two
Root transmission pressure constitutes primary Ioops between two adjacent steel towers, is limited to the spacing of two transmission pressures by fixator
In setting range；It is the loop power supply by high power high-current ac power, and then draws the AC resistance in the loop
The corresponding inductance with current wire pitch.In addition, before the loop of transmission pressure is installed into steel tower, also it is measurable go out
The length of transmission pressure, then will solve equation the length of obtained AC resistance and inductance divided by transmission pressure, can obtain list
The inductance of the AC resistance of bit length transmission pressure and the unit length under current wire pitch.
On-the-spot test discovery is carried out to obtained AC resistance by voltammetry：The wire AC resistance measured with laboratory
With good uniformity, and verify the AC resistance of transmission pressure and increase with the increase by the alternating current of input
Plus, the AC resistance measuring method for demonstrating above-mentioned transmission pressure is feasible for the AC resistance for measuring transmission pressure.
It should be noted that for foregoing each method embodiment, for simplicity description, it is all expressed as a series of
Combination of actions, but those skilled in the art should know, the present invention is not limited by described sequence of movement, because according to
According to the present invention, some steps can use other orders or carry out simultaneously.In addition, also any group can be carried out to above-described embodiment
Close, obtain other embodiments.
Based on the AC resistance measuring method identical thought with the transmission pressure in above-described embodiment, the present invention is also provided
The AC resistance measuring system of transmission pressure, the system can be used for the AC resistance measuring method for performing above-mentioned transmission pressure.For
It is easy in explanation, the structural representation of the AC resistance measuring system embodiment of transmission pressure, illustrate only and the present invention
The related part of embodiment, it will be understood by those skilled in the art that the restriction of schematic structure not structure paired systems, can include
Than illustrating more or less parts, some parts or different parts arrangement are either combined.
Fig. 5 is the schematic diagram of the AC resistance measuring system of the transmission pressure of one embodiment of the invention；Such as Fig. 5 institutes
Show, the AC resistance measuring system of the transmission pressure of the present embodiment includes：Power supply and acquisition module 310, loop equation build mould
Block 320 and solution module 330, details are as follows for each module：
Power supply and acquisition module 310, the loop for being constituted to transmission pressure to be measured inputs different size of exchange respectively
Electricity, the measurement voltage drop in the loop and the electric current flowed through under different alternating current input conditions；The loop is two identical
The loop of parallel two wires transmission line structure that is configured to of transmission pressure to be measured, and the loop is in the situation of input AC electricity
The series circuit of AC resistance and inductance can be equivalent to down；
Loop equation builds module 320, for the clock signal and the clock signal of electric current according to the voltage drop measured
Each in the corresponding loop-voltage equation group in loop described in each measurement moment, the loop-voltage equation group is set up respectively
Equation is satisfied by Kirchhoff's second law；
Module 330 is solved, for the loop-voltage equation group simultaneous solution, obtaining the equivalent alternating current in the loop
Resistance and inductance, the transmission of electricity is drawn according to the length of the equivalent AC resistance in the loop and inductance and transmission pressure to be measured
The AC resistance and inductance of conductor.
Preferably, the spacing in the loop between two transmission pressures is in setting range, such as in 1mm to 2000mm
In the range of, to reduce influence of the outer self-induction to measurement result.
In one embodiment, the AC resistance measuring system of above-mentioned transmission pressure also includes：Signal smoothing module, for pair
The clock signal of the voltage drop measured and the clock signal of electric current are smoothed, to suppress the noise in signal, it is ensured that
The voltage drop at each measurement moment and the phase difference of electric current keep constant.Corresponding, it is specific that the loop equation builds module 320
It can be set up according to the clock signal and the clock signal of electric current of the voltage drop after smoothing processing in loop described in each measurement moment
Corresponding loop-voltage equation group.The accuracy of measurement result is improved with this.
In one embodiment, the signal smoothing module specifically can be using voltage of the following smoothing formula to each measurement moment
Drop/electric current is smoothed：
Wherein, i represents currently to measure the current measurement moment letter of participation after moment, the current measurement moment that N represents setting
Number smoothing processing measurement the moment quantity, n represent measure moment n, and measurement moment n currently measurement the moment after, k
(n) measurement signal at measurement moment n is represented, k (i) represents the substitution value of current measurement time-ofday signals.
In one embodiment, the loop equation build module 330 specifically can according to the clock signal of the voltage drop and
The corresponding loop-voltage equation group in loop described in each measurement moment that the clock signal of electric current is set up is：
Wherein, r represents the equivalent resistance value in the loop, and L represents the equivalent inductance value in the loop, and u represents to work as
The voltage drop in loop described in the preceding measurement moment, i represents the electric current that currently loop described in the measurement moment is flowed through.
It should be noted that in the embodiment of the AC resistance measuring system of the transmission pressure of above-mentioned example, each module
Between the content such as information exchange, implementation procedure, due to being based on same design with preceding method embodiment of the present invention, what it brought
Technique effect is identical with preceding method embodiment of the present invention, and particular content can be found in the narration in the inventive method embodiment, this
Place is repeated no more.
In addition, in the embodiment of the AC resistance measuring system of the transmission pressure of above-mentioned example, each functional module is patrolled
Division is collected to be merely illustrative of, can be as needed in practical application, such as configuration requirement or software for corresponding hardware
Realization convenient consideration, above-mentioned functions are distributed and completed by different functional modules, will the transmission pressure alternating current
The internal structure of resistance measuring system is divided into different functional modules, to complete all or part of function described above.Its
In each function mould can both be realized in the form of hardware, it would however also be possible to employ the form of software function module is realized.
In the above-described embodiments, the description to each embodiment all emphasizes particularly on different fields, and does not have the portion being described in detail in some embodiment
Point, it may refer to the associated description of other embodiments.
Embodiment described above only expresses the several embodiments of the present invention, it is impossible to be interpreted as to the scope of the claims of the present invention
Limitation.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise,
Various modifications and improvements can be made, these belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention
It should be determined by the appended claims.
Claims (10)
1. a kind of AC resistance measuring method of transmission pressure, it is characterised in that including：
The loop constituted to transmission pressure to be measured inputs different size of alternating current respectively, measures in different alternating current input conditions
Under the loop voltage drop and the electric current that flows through；The loop be two identical transmission pressures to be measured be configured to it is parallel
The loop of two wires transmission line structure, and the loop can be equivalent to AC resistance and inductance in the case of input AC electricity
Series circuit；
The loop according to the clock signal of the clock signal of the voltage drop measured and electric current sets up each measurement moment respectively
Each equation in corresponding loop-voltage equation group, the loop-voltage equation group is satisfied by Kirchhoff's second law；
To the loop-voltage equation group simultaneous solution, the loop equivalent AC resistance and inductance are obtained；According to described time
The length of the equivalent AC resistance in road and inductance and transmission pressure to be measured, draws the exchange of the transmission pressure unit length
Resistance and inductance.
2. the AC resistance measuring method of transmission pressure according to claim 1, it is characterised in that measurement is in different exchanges
Under electric input condition after the voltage drop in the loop and the electric current flowed through, in addition to：
The clock signal of voltage drop and the clock signal of electric current measured is smoothed, to suppress making an uproar in signal
Sound, it is ensured that the voltage drop at each measurement moment and the phase difference of electric current are constant；
The clock signal for the voltage drop that the basis is measured and the clock signal of electric current were set up described in each measurement moment respectively
The corresponding loop-voltage equation group in loop, including：Believed according to the sequential of the clock signal of the voltage drop after smoothing processing and electric current
Number, set up in the corresponding loop-voltage equation group in loop described in each measurement moment.
3. the AC resistance measuring method of transmission pressure according to claim 2, it is characterised in that to the voltage measured
The clock signal of drop and the clock signal of electric current are smoothed, including：
By the voltage drop/electric current at each measurement moment, with the measurement moment and its afterwards, setting quantity measures the voltage at moment
The average value of drop/electric current is substituted.
4. the AC resistance measuring method of transmission pressure according to claim 3, it is characterised in that
Voltage drop/the electric current at each measurement moment is smoothed using following smoothing formula：
Wherein, i represents that participation currently measures time-ofday signals after currently measuring moment, the current measurement moment that N represents setting
The quantity at the measurement moment of smoothing processing, n represents to measure moment n, and measurement moment n is after the currently measurement moment, k (n) tables
Show the measurement signal at measurement moment n, k (i) represents the substitution value of current measurement time-ofday signals.
5. the AC resistance measuring method of transmission pressure according to claim 1, it is characterised in that according to the voltage drop
Clock signal and electric current clock signal set up each measurement moment described in the corresponding loop-voltage equation group in loop be：
Wherein, r represents the equivalent resistance value in the loop, and L represents the equivalent inductance value in the loop, and u represents current survey
The voltage drop in loop described in the moment is measured, i represents the electric current that currently loop described in the measurement moment is flowed through.
6. the AC resistance measuring method of transmission pressure according to claim 1, it is characterised in that estimated using least square
Calculating method is solved to the loop-voltage equation group, including：
The loop-voltage equation group is subjected to discrete processes, using least-squares estimation algorithm to the voltage side after discrete processes
Journey group is solved.
7. the AC resistance measuring method of transmission pressure according to claim 1, it is characterised in that including：Wherein, it is described
Spacing in loop between two transmission pressures is in setting range；
And/or,
Using least square method to the loop-voltage equation group simultaneous solution, the loop equivalent AC resistance and electricity are obtained
Sense.
8. a kind of AC resistance measuring system of transmission pressure, it is characterised in that including：
Power supply and acquisition module, the loop for being constituted to transmission pressure to be measured input different size of alternating current respectively, measure
The voltage drop in the loop and the electric current flowed through under different alternating current input conditions；The loop is that two identicals are to be measured defeated
The loop for the parallel two wires transmission line structure that electric lead is configured to, and the loop input AC electricity in the case of can wait
Imitate the series circuit for AC resistance and inductance；
Loop equation builds module, for being set up respectively according to the clock signal of voltage drop and the clock signal of electric current that measure
Each equation in the corresponding loop-voltage equation group in loop described in each measurement moment, the loop-voltage equation group is full
Sufficient Kirchhoff's second law；
Module is solved, for the loop-voltage equation group simultaneous solution, obtaining the loop equivalent AC resistance and electricity
Sense, the transmission pressure list is drawn according to the length of the equivalent AC resistance in the loop and inductance and transmission pressure to be measured
The AC resistance and inductance of bit length.
9. the AC resistance measuring system of transmission pressure according to claim 8, it is characterised in that also include：
Signal smoothing module, is smoothed for the clock signal of the voltage drop to measuring and the clock signal of electric current,
To suppress the noise in signal, it is ensured that the voltage drop at each measurement moment and the phase difference of electric current keep constant；
The loop equation builds module according to the clock signal of the voltage drop after smoothing processing and the clock signal of electric current, sets up
In the corresponding loop-voltage equation group in loop described in each measurement moment.
10. the AC resistance measuring system of transmission pressure according to claim 8, it is characterised in that the signal smoothing
Module, for being smoothed using following smoothing formula to the voltage drop/electric current at each measurement moment：
Wherein, i represents that participation currently measures time-ofday signals after currently measuring moment, the current measurement moment that N represents setting
The quantity at the measurement moment of smoothing processing, n represents to measure moment n, and measurement moment n is after the currently measurement moment, k (n) tables
Show the measurement signal at measurement moment n, k (i) represents the substitution value of current measurement time-ofday signals；
And/or,
The loop equation builds module, and it is each that the clock signal for the clock signal according to the voltage drop and electric current is set up
It is individual measurement the moment described in the corresponding loop-voltage equation group in loop be：
Wherein, r represents the equivalent resistance value in the loop, and L represents the equivalent inductance value in the loop, and u represents current survey
The voltage drop in loop described in the moment is measured, i represents the electric current that currently loop described in the measurement moment is flowed through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710165738.7A CN107015060B (en) | 2017-03-20 | 2017-03-20 | Method and system for measuring alternating current resistance of power transmission conductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710165738.7A CN107015060B (en) | 2017-03-20 | 2017-03-20 | Method and system for measuring alternating current resistance of power transmission conductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107015060A true CN107015060A (en) | 2017-08-04 |
| CN107015060B CN107015060B (en) | 2019-04-23 |
Family
ID=59439956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710165738.7A Active CN107015060B (en) | 2017-03-20 | 2017-03-20 | Method and system for measuring alternating current resistance of power transmission conductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107015060B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254623A (en) * | 2017-12-15 | 2018-07-06 | 上海电力学院 | A kind of conducting wire high-frequency ac resistance measuring method and device |
| CN109799391A (en) * | 2019-01-29 | 2019-05-24 | 湖南银河电气有限公司 | Conductor AC resistance measurement method, system and computer storage medium |
| CN113945762A (en) * | 2021-10-15 | 2022-01-18 | 南瑞集团有限公司 | Method, system and device for measuring alternating current resistance of small-signal cable conductor |
| CN114342245A (en) * | 2019-09-12 | 2022-04-12 | 纬湃科技有限责任公司 | Method for controlling speed of brushless motor |
| CN115980451A (en) * | 2022-12-05 | 2023-04-18 | 哈尔滨理工大学 | Method for extracting alternating current equivalent resistance of large-section cable conductor |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02203280A (en) * | 1988-04-15 | 1990-08-13 | Daimler Benz Ag | Non-contact method and apparatus for resistence provided secondary circuit of transformer |
| JP2007309797A (en) * | 2006-05-18 | 2007-11-29 | Espec Corp | Resistance measuring device and method |
| CN101101324A (en) * | 2006-07-04 | 2008-01-09 | 上海创想电源设备有限公司 | Power supply apparatus test device containing coding load |
| CN101285852A (en) * | 2008-05-26 | 2008-10-15 | 中国航天科技集团公司第五研究院第五一四研究所 | Alternating current voltage electric current converter and device and method for testing alternating-current small ammeter |
| CN102313853A (en) * | 2011-08-02 | 2012-01-11 | 广东电网公司电力科学研究院 | System for measuring and calculating dynamic transmission capacity of high voltage transmission line and method thereof |
| CN102621388A (en) * | 2012-04-13 | 2012-08-01 | 山东电力集团公司潍坊供电公司 | Electric transmission line lumped parameter on-line determination method based on synchronous time domain signals |
| CN102778619A (en) * | 2012-07-11 | 2012-11-14 | 华北电力大学 | Method for detecting maximum current-carrying capacity of transmission conductor of high-voltage transmission line |
| CN102801383A (en) * | 2012-09-07 | 2012-11-28 | 伟肯(苏州)电气传动有限公司 | Alternating current motor driving device with charging function and charging method thereof |
| CN103647272A (en) * | 2013-10-22 | 2014-03-19 | 国家电网公司 | Alternating-current and direct-current power grid static equivalence method suitable for cascading failures |
| CN105336459A (en) * | 2015-12-08 | 2016-02-17 | 杭州大华仪器制造有限公司 | AC resistance box of novel structure |
-
2017
- 2017-03-20 CN CN201710165738.7A patent/CN107015060B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02203280A (en) * | 1988-04-15 | 1990-08-13 | Daimler Benz Ag | Non-contact method and apparatus for resistence provided secondary circuit of transformer |
| JP2007309797A (en) * | 2006-05-18 | 2007-11-29 | Espec Corp | Resistance measuring device and method |
| CN101101324A (en) * | 2006-07-04 | 2008-01-09 | 上海创想电源设备有限公司 | Power supply apparatus test device containing coding load |
| CN101285852A (en) * | 2008-05-26 | 2008-10-15 | 中国航天科技集团公司第五研究院第五一四研究所 | Alternating current voltage electric current converter and device and method for testing alternating-current small ammeter |
| CN102313853A (en) * | 2011-08-02 | 2012-01-11 | 广东电网公司电力科学研究院 | System for measuring and calculating dynamic transmission capacity of high voltage transmission line and method thereof |
| CN102621388A (en) * | 2012-04-13 | 2012-08-01 | 山东电力集团公司潍坊供电公司 | Electric transmission line lumped parameter on-line determination method based on synchronous time domain signals |
| CN102778619A (en) * | 2012-07-11 | 2012-11-14 | 华北电力大学 | Method for detecting maximum current-carrying capacity of transmission conductor of high-voltage transmission line |
| CN102801383A (en) * | 2012-09-07 | 2012-11-28 | 伟肯(苏州)电气传动有限公司 | Alternating current motor driving device with charging function and charging method thereof |
| CN103647272A (en) * | 2013-10-22 | 2014-03-19 | 国家电网公司 | Alternating-current and direct-current power grid static equivalence method suitable for cascading failures |
| CN105336459A (en) * | 2015-12-08 | 2016-02-17 | 杭州大华仪器制造有限公司 | AC resistance box of novel structure |
Non-Patent Citations (3)
| Title |
|---|
| 袁鹏 等: "一种高压输电线交流电阻在线测量新方法的研究", 《高压电器》 * |
| 车孝轩: "在线交流电阻的测量方法及其装置", 《高电压技术》 * |
| 邢海文: "电力电缆故障诊断技术的研究", <中国优秀博硕士学位论文全文数据库 (硕士) 工程科技Ⅱ辑》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254623A (en) * | 2017-12-15 | 2018-07-06 | 上海电力学院 | A kind of conducting wire high-frequency ac resistance measuring method and device |
| CN108254623B (en) * | 2017-12-15 | 2020-04-07 | 上海电力学院 | Method and device for measuring high-frequency alternating current resistance of lead |
| CN109799391A (en) * | 2019-01-29 | 2019-05-24 | 湖南银河电气有限公司 | Conductor AC resistance measurement method, system and computer storage medium |
| CN109799391B (en) * | 2019-01-29 | 2021-06-01 | 湖南银河电气有限公司 | Conductor alternating current resistance measuring method, system and computer storage medium |
| CN114342245A (en) * | 2019-09-12 | 2022-04-12 | 纬湃科技有限责任公司 | Method for controlling speed of brushless motor |
| CN114342245B (en) * | 2019-09-12 | 2024-06-11 | 纬湃科技有限责任公司 | Method for controlling speed of brushless motor |
| CN113945762A (en) * | 2021-10-15 | 2022-01-18 | 南瑞集团有限公司 | Method, system and device for measuring alternating current resistance of small-signal cable conductor |
| CN115980451A (en) * | 2022-12-05 | 2023-04-18 | 哈尔滨理工大学 | Method for extracting alternating current equivalent resistance of large-section cable conductor |
| CN115980451B (en) * | 2022-12-05 | 2023-06-23 | 哈尔滨理工大学 | Extraction method of alternating-current equivalent resistance of large-section cable conductor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107015060B (en) | 2019-04-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107015060A (en) | Method and system for measuring alternating current resistance of power transmission conductor | |
| CN108647438B (en) | Soil equivalent resistance model modeling method | |
| CN106019080B (en) | A kind of common-tower double-return DC line Single Terminal Traveling Wave Fault Location method based on energy jump along the line | |
| KR100968046B1 (en) | Method for ground resistance measurement of transmission tower equipped with overhead groundwires | |
| CN105653818B (en) | A kind of electric railway traction net impedance computation method | |
| CN110954786B (en) | Hybrid multi-terminal direct current transmission line traveling wave distance measurement method based on HHT | |
| Papadopoulos et al. | Narrowband power line communication: Medium voltage cable modeling and laboratory experimental results | |
| CN106934098B (en) | Method for determining amplitude and phase of layered current of overhead conductor | |
| CN109490706A (en) | A kind of multi branch electric power lines road Fault Locating Method | |
| WO2013004146A1 (en) | Online alternating current detection device and method | |
| CN111766470B (en) | Fault positioning method and system for high-voltage direct-current transmission line and direct-current transmission line | |
| CN102508086A (en) | Parameter estimation method for electric power circuit in T-type connection | |
| CN109541513A (en) | A kind of exchange micro-current is traced to the source device and method | |
| CN104237832B (en) | A kind of calibration method and device of complex impedance standard | |
| Li et al. | An efficient simplification scheme for modeling crosstalk of complex cable bundles above an orthogonal ground plane | |
| CN111007315B (en) | Circuit branch identification method based on current harmonic spectrum | |
| CN107957541B (en) | A kind of power semiconductor modular internal parallel cDNA microarray method and system | |
| CN106649946A (en) | Simulation calculation method for power frequency phase parameters of power transmission line | |
| CN207007942U (en) | Alternating current resistance measuring system and fixer of transmission line | |
| CN211603531U (en) | High-precision sweep frequency type Rogowski coil mutual inductance calibration system | |
| CN112578184A (en) | Multi-load parameter identification method and system for wireless charging system | |
| CN107561368A (en) | A kind of measuring system and measuring method of large scale electrical power unit wideband impedance operator | |
| CN110260997A (en) | A kind of Thermistor Temperature Measurement device | |
| CN207148223U (en) | A kind of measuring system of large scale electrical power unit wideband impedance operator | |
| CN111864741B (en) | Quantitative analysis method and system for influence of line parameter errors on power distribution |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210805 Address after: 710049 No. 28 West Xianning Road, Shaanxi, Xi'an Patentee after: XI'AN JIAOTONG University Patentee after: China South Power Grid International Co.,Ltd. Address before: 710049 No. 28 West Xianning Road, Shaanxi, Xi'an Patentee before: XI'AN JIAOTONG University Patentee before: POWER GRID TECHNOLOGY RESEARCH CENTER. CHINA SOUTHERN POWER GRID Patentee before: China South Power Grid International Co.,Ltd. |