CN109188096A - Measuring contact resistance method and device - Google Patents
Measuring contact resistance method and device Download PDFInfo
- Publication number
- CN109188096A CN109188096A CN201811344934.1A CN201811344934A CN109188096A CN 109188096 A CN109188096 A CN 109188096A CN 201811344934 A CN201811344934 A CN 201811344934A CN 109188096 A CN109188096 A CN 109188096A
- Authority
- CN
- China
- Prior art keywords
- contact resistance
- impedance
- armor rods
- preformed armor
- alternating 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
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
-
- 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
- G01R27/20—Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
Abstract
The application provides a kind of measuring contact resistance method and device, for measuring the contact resistance at preformed armor rods and ground contact port, is related to measuring contact resistance technical field.The measuring contact resistance method includes: the alternating current for obtaining two kinds of different frequencies of the contact resistance variation rate for meeting preset requirement；The alternating current based on two kinds of different frequencies is loaded at preformed armor rods and ground contact port, measures first voltage and second voltage at preformed armor rods and ground contact port respectively；According to first voltage and second voltage, the contact resistance at preformed armor rods and ground contact port is obtained.Using the measuring contact resistance method and device, ac contactor resistance can be directly measured, and effectively reduces existing error between the measured value of contact resistance and actual value.
Description
Technical field
This application involves resistive measurement fields, in particular to a kind of measuring contact resistance method and device.
Background technique
Ground wire leads to the generation of line-outage contingency because of overheat, often causes the grid power blackout of large area, or even cause secondary calamity
Evil, seriously affects safe and stable operation and the personal safety of power grid.It is existing studies have shown that the preformed armor rods of ground wire suspension string are disconnected
It is main fever " bottleneck " point that mouth (contact port of the preformed armor rods with ground wire) is internal, and preformed armor rods fracture contact resistance is to lead
Cause a key factor of ground wire broken string.It therefore, is to research and analyse its hair for the accurate measurement of preformed armor rods fracture contact resistance
Thermal characteristics and an important foundation for proposing related solution.
Measuring contact resistance belongs to microresistivity survey, is at present to pass through Current Voltage to the main measurement method of contact resistance
Method obtains direct current contact resistance；And when measuring ac contactor resistance, and directly measured and obtained directly by using current and voltage method
Contact resistance is flowed to replace ac contactor resistance.
But when skin effect is obvious, the above-mentioned acquisition direct current contact resistance that directly measured using current and voltage method carrys out generation
For the method for ac contactor resistance, making the measured value of contact resistance, there are biggish errors with actual value.
Summary of the invention
The purpose of the application is, in view of the deficiency of the prior art, provide a kind of measuring contact resistance method and
Device can directly measure ac contactor resistance using the measuring contact resistance method and device, and effectively reduce contact resistance
Measured value and actual value between existing error.
To achieve the above object, technical solution used by the embodiment of the present application is as follows:
In a first aspect, the embodiment of the present application provides a kind of measuring contact resistance method, the method is for measuring preformed armor rods
With the contact resistance at ground contact port, which comprises
Obtain the alternating current for meeting two kinds of different frequencies of contact resistance variation rate of preset requirement；
The alternating current based on two kinds of different frequencies is loaded at preformed armor rods and ground contact port, measures preformed armor rods respectively
With the first voltage and second voltage at ground contact port；
According to first voltage and second voltage, the contact resistance at preformed armor rods and ground contact port is obtained.
As described above, obtaining the step for meeting the alternating current of two kinds of different frequencies of contact resistance variation rate of preset requirement
Suddenly, comprising:
The first frequency of arbitrarily selected first alternating current is corresponded to according to the first frequency of first alternating current
The first skin depth；
According to the contact resistance variation rate of the first skin depth of the first alternating current and preset requirement, the second exchange is obtained
The second skin depth and the corresponding second frequency of the second alternating current of electric current.
As described above, obtaining the contact resistance at preformed armor rods and ground contact port according to first voltage and second voltage
The step of, comprising:
Respectively according to first voltage and the first alternating current and second voltage and the second alternating current, calculate separately
The first impedance and the second impedance at corresponding preformed armor rods and ground contact port；
According to the first impedance and the second impedance, the contact resistance at preformed armor rods and ground contact port is obtained.
Optionally, in one embodiment, according to the first impedance and the second impedance, preformed armor rods and ground contact end are obtained
Mouthful at contact resistance the step of, comprising:
According to the first impedance and the second impedance, the inductance at preformed armor rods and ground contact port is calculated, wherein calculate
Process ignores contact resistance variation rate；
According to inductance and the first impedance or inductance and the second impedance, it is calculated at preformed armor rods and ground contact port
Contact resistance.
Optionally, in another embodiment, according to the first impedance and the second impedance, preformed armor rods and ground contact are obtained
The step of contact resistance at port, comprising:
According to the first impedance and the second impedance, the impedance angle at preformed armor rods and ground contact port is calculated, wherein meter
Calculation process ignores contact resistance variation rate；
According to impedance angle and the first impedance or impedance angle and the second impedance, preformed armor rods and ground contact port are calculated
The contact resistance at place.
As described above, the contact resistance variation rate of preset requirement refers to contact resistance variation rate no more than 5 percent.
Optionally, in one embodiment, first frequency is high frequency value, and second frequency is non-high frequency value.
Optionally, in one embodiment, the current effective value of the alternating current of two kinds of different frequencies is identical.
Second aspect, the embodiment of the present application also provide a kind of measuring contact resistance device, comprising: obtain module, measurement mould
Block and processing module；
Obtain the alternating current that module is used to obtain two kinds of different frequencies of the contact resistance variation rate for meeting preset requirement；
Measurement module is used to load the alternating current based on described two different frequencies at preformed armor rods and ground contact port
Stream measures first voltage and second voltage at the preformed armor rods and ground contact port respectively；
Processing module is used to obtain the preformed armor rods electricity of the contact at ground contact port according to first voltage and second voltage
Resistance.
As described above, the contact resistance variation rate of preset requirement refers to the contact resistance variation rate no more than percent
Five.
The beneficial effect of the application is:
In a first aspect, measuring contact resistance method provided by the embodiments of the present application, meets preset requirement by acquisition and (such as connects
Alternating current of the resistance change rate no more than two kinds of different frequencies of percent contact resistance variation rate five) is touched, is measured respectively
The first voltage and second when the alternating current based on described two different frequencies is loaded at preformed armor rods and ground contact port
Voltage, and ignore contact resistance variation, and then the contact resistance of preformed armor rods Yu ground contact port can be calculated.Therefore,
Measuring contact resistance method provided by the embodiments of the present application can not only measure preformed armor rods and connect with exchanging at ground contact port
Electric shock resistance, and due to can ignore that contact resistance variation in calculating process, to effectively reduce the measurement of contact resistance
Existing error between value and actual value.In addition, detected needed for the measuring contact resistance method provided by the embodiments of the present application
Data are few, so that detection process is simple, detection accuracy is higher, to can also prevent the external world on the basis of guaranteeing detection accuracy
The interference of factor.
Second aspect, measuring contact resistance device provided by the embodiments of the present application have used connecing as described in relation to the first aspect
Resistance measurement method is touched, therefore has whole beneficial effects described in above-mentioned first aspect, details are not described herein.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application will make below to required in the embodiment of the present application
Attached drawing is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore should not be seen
Work is the restriction to range, for those of ordinary skill in the art, without creative efforts, can be with
Other relevant attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram of ground wire suspension string provided by the present application；
Fig. 2 is the flow diagram of measuring contact resistance method provided by the present application；
Fig. 3 be two kinds of the contact resistance variation rate that a kind of acquisition that provides of embodiment of the application meets preset requirement not
The flow diagram of the alternating current method of same frequency；
Fig. 4 is the flow diagram of calculation of contact resistance method provided by the present application；
Fig. 5 is a kind of flow diagram for the calculation of contact resistance method that embodiment provides of the application；
Fig. 6 is the flow diagram for the calculation of contact resistance method that the application another embodiment provides；
Fig. 7 is measuring contact resistance apparatus function module diagram provided by the present application.
Specific embodiment
To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
In attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, instead of all the embodiments.The application being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiments herein provided in the accompanying drawings is not intended to limit below claimed
Scope of the present application, but be merely representative of the selected embodiment of the application.Based on the embodiment in the application, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model of the application protection
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.In addition, term " the
One ", " second ", " third " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
In the description of the present application, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in this application.
As shown in Figure 1, being the structural schematic diagram of ground wire suspension string.Ground wire suspension string includes: shaft tower fastener 101, shaft tower
102, suspension clamp 103, preformed armor rods 104, ground wire 105 and preformed armor rods and ground contact port 106；Wherein, preformed armor rods and ground
Line contact port 106 is main fever " bottleneck " point, and the contact resistance of preformed armor rods and ground contact port 106 is to cause
The key factor that ground wire 105 breaks.
Currently, since overhead transmission line overwhelming majority operation is in exchange status, so measuring preformed armor rods by exchange way
It more tallies with the actual situation with the contact resistance at ground contact port 106.But it in the prior art, is measured according to the mode of exchange
When preformed armor rods and the contact resistance of ground contact port 106, needs to introduce the detection device instrument of the impedance angles such as oscillograph, obtain
The phase difference of surveyed electric current and voltage, measurement process is cumbersome, and measurement data is more, and error is larger.
It therefore, is the heat generation characteristic for researching and analysing preformed armor rods Yu ground contact port 106, the application provides a kind of contact electricity
Measurement method is hindered, the method is used to measure the contact resistance at preformed armor rods and ground contact port 106.
As shown in Fig. 2, described method includes following steps:
S110, acquisition meet the alternating current of two kinds of different frequencies of the contact resistance variation rate of preset requirement；
Specifically, the contact resistance variation rate of preset requirement refers to, when adding at preformed armor rods and ground contact port respectively
When carrying the alternating current of two kinds of different frequencies, the contact resistance variation rate at preformed armor rods and ground contact port is not more than default threshold
Value.
For example, the contact resistance variation rate of preset requirement can become in a kind of embodiment of the application for contact resistance
Rate is not more than 5 percent.It is not more than 5 percent according to contact resistance variation rate, obtains and contact electricity under two kinds of different frequencies
Alternating current of the resistive within 5 percent, so that loading two kinds of different frequencies at preformed armor rods and ground contact port respectively
When the alternating current of rate, the contact resistance variation of preformed armor rods and ground contact port is negligible, so as to effectively reduce contact
Existing error between the measured value and actual value of resistance.
S120, the alternating current based on two kinds of different frequencies is loaded at preformed armor rods and ground contact port, measure respectively
First voltage and second voltage at preformed armor rods and ground contact port；
Specifically, can be by loading the first alternating current of first frequency at preformed armor rods and ground contact port, and survey
It measures the first voltage at preformed armor rods and ground contact port, and passes through the load the at preformed armor rods and ground contact port
Second alternating current of two frequencies, and measure and obtain the second voltage at preformed armor rods and ground contact port.Wherein, respectively pre-
It is preformed at hank knotting and ground contact port when the second alternating current of the first alternating current of load first frequency and second frequency
Silk meets preset requirement described in above-mentioned steps S110 with the contact resistance variation rate at ground contact port.
Optionally, when measuring first voltage and second voltage, detection method can be used, sampling method, thermo-electric method, survey radiant heat
The measurement methods such as method and penalty method, the application do not do any restriction herein.
S130, according to first voltage and second voltage, obtain the contact resistance at preformed armor rods and ground contact port.
It specifically, can be respectively according to first voltage and after step S120 measurement obtains first voltage and second voltage
The size and second voltage of one alternating current and the size of the second alternating current, are calculated respectively in preformed armor rods and ground wire
When contacting the second alternating current of the first alternating current and second frequency that load first frequency at port, preformed armor rods connect with ground wire
The first impedance and the second impedance at contravention mouth.Further, due to the contact resistance variation at preformed armor rods and ground contact port
Rate meets preset requirement, thus the variation of negligible contact resistance, and according to the first impedance and the second impedance obtain preformed armor rods with
Contact resistance at ground contact port.
In conclusion measuring contact resistance method provided by the present application, meets preset requirement (such as contact resistance by obtaining
Change rate is measured respectively no more than the alternating current of two kinds of different frequencies of percent contact resistance variation rate five) preformed
Silk and the first voltage and second voltage when loading alternating current based on described two different frequencies at ground contact port, and
Ignore contact resistance variation, and then the contact resistance of preformed armor rods Yu ground contact port can be calculated.Therefore, the application mentions
The measuring contact resistance method of confession can not only measure the ac contactor resistance at preformed armor rods and ground contact port, Er Qieyou
In can ignore that contact resistance variation in calculating process, to effectively reduce between the measured value of contact resistance and actual value
Existing error.In addition, the data detected needed for the measuring contact resistance method provided by the present application are few, so that detection process is simple
List, detection accuracy are higher, to can also prevent the interference of extraneous factor on the basis of guaranteeing detection accuracy.
Further, measuring contact resistance method provided by the present application, can be to avoid impedance angle be directly detected, without introducing
Detection devices such as oscillograph, therefore measuring device is less, when practical application, are more convenient, and it is excessive to can be avoided detection device
And bring other measurement errors.
As shown in figure 3, in one embodiment, above-mentioned acquisition meets two kinds of the contact resistance variation rate of preset requirement
The step of alternating current of different frequency, comprising:
The first frequency of S111, arbitrarily selected first alternating current are obtained according to the first frequency of first alternating current
To corresponding first skin depth；
Specifically, when measuring the contact resistance of preformed armor rods and ground contact port, for the first of the first alternating current
Frequency can be arbitrarily selected, such as selected first frequency is high frequency value or non-high frequency value.It, can be according to the after selected first frequency
The first frequency of one alternating current obtains corresponding first skin depth, and detailed process is as follows:
Wherein, d1For the first skin depth, ω is angular frequency, and μ is magnetic conductivity, and γ is conductivity, f1For first frequency.
S112, according to the first skin depth of the first alternating current and the contact resistance variation rate of preset requirement, obtain
The second skin depth and the corresponding second frequency of the second alternating current of two alternating currents.
Specifically, after the first frequency that step S111 obtains the first alternating current obtains corresponding first skin depth,
It can be according to contact resistance variation rate (such as contact resistance change of the first skin depth and preset requirement of the first obtained alternating current
Five) rate, obtains the second skin depth of the second alternating current, detailed process is as follows no more than percent:
Wherein, Δ R is the variable quantity of contact resistance under different frequency, R1For the corresponding contact resistance of first frequency, S1It is
One frequency it is corresponding become skin sectional area, Δ S is the variable quantity of skin sectional area of becoming under different frequency, d1For the first skin depth, d2For
Second skin depth, r are the section radius of preformed armor rods and ground contact port.
After obtaining the second skin depth of the second alternating current, the second alternating current can be obtained according to the second skin depth
Second frequency, detailed process is as follows:
Wherein, f2For second frequency, μ is magnetic conductivity, and γ is conductivity, d2For the first skin depth.
As shown in figure 4, in one embodiment, it is above-mentioned according to first voltage and second voltage, obtain preformed armor rods and ground
Line contacts the step of contact resistance at port, comprising:
S131, respectively according to first voltage and the first alternating current and second voltage and the second alternating current, count respectively
It calculates and obtains the first impedance and the second impedance at corresponding preformed armor rods and ground contact port；
Specifically, the value of first voltage and second voltage is learnt measured by S120 through the above steps respectively, the first exchange
The size of electric current and the second alternating current can be manually set or be adjusted before load, be given value.Therefore, the first impedance and
Second impedance can be calculated by following process and be learnt:
Wherein, Z1For the first impedance, U1For first voltage, I1The virtual value of first alternating current；
Wherein, Z2For the second impedance, U2For second voltage, I2The virtual value of second alternating current.
Optionally, the first alternating current can be identical with the virtual value of the second alternating current, right in the process to be convenient for measuring
The calculating of first voltage and second voltage, or be conveniently load the first alternating current and second at preformed armor rods and ground contact port
Alternating current.For the virtual value size of the first alternating current and the second alternating current, can be set according to specific measurement demand, this
Any restriction is not done in application herein.
S132, according to the first impedance and the second impedance, obtain the contact resistance at preformed armor rods and ground contact port.
Specifically, the first alternating current and the second alternating current, corresponding preformed armor rods are being obtained by step S131
After the first impedance and the second impedance at ground contact port, preformed armor rods and ground contact port can be obtained according to step S132
The contact resistance at place.
As shown in figure 5, in one embodiment, it is above-mentioned according to the first impedance and the second impedance, obtain preformed armor rods and ground
Line contacts the step of contact resistance at port, comprising:
S1321, according to the first impedance and the second impedance, the inductance at preformed armor rods and ground contact port is calculated,
In, calculating process ignores contact resistance variation rate；
Specifically, the first impedance and the second impedance can be expressed by following expression respectively:
Wherein, Z1For the first impedance, R1Corresponding contact resistance, ω when to load the first alternating current1For the first electric current
Angular frequency, L are inductance；
Wherein, Z2For the second impedance, R2Corresponding contact resistance, ω when to load the second alternating current2For the second electric current
Angular frequency, L are inductance；
Due in calculating process, having ignored contact resistance variation rate, therefore, in the table of above-mentioned first impedance and the second impedance
Up in formula, when loading the first alternating current and the second alternating current respectively, corresponding contact resistance be believed that it is equal, namely:
R1=R2；
So can obtain:
Pass through the expression formula of the first impedance at this time:
And second impedance expression formula:
Simultaneous can obtain inductance are as follows:
S1322, according to inductance and the first impedance or inductance and the second impedance, preformed armor rods and ground contact end are calculated
Contact resistance at mouthful.
Specifically, preformed armor rods and the contact resistance at ground contact port are as follows:
Or
It is above-mentioned according to the first impedance and the second impedance as shown in fig. 6, in another embodiment, obtain preformed armor rods with
The step of contact resistance at ground contact port, comprising:
S1323, according to the first impedance and the second impedance, the impedance angle at preformed armor rods and ground contact port is calculated,
Wherein, calculating process ignores contact resistance variation rate；
Specifically, the first impedance and the second impedance can be expressed by following expression respectively:
Wherein, Z1For the first impedance, R1Corresponding contact resistance, ω when to load the first alternating current1For the first electric current
Angular frequency, L are inductance；
Wherein, Z2For the second impedance, R2Corresponding contact resistance, ω when to load the second alternating current2For the second electric current
Angular frequency, L are inductance；
Due in calculating process, having ignored contact resistance variation rate, therefore, in the table of above-mentioned first impedance and the second impedance
Up in formula, when loading the first alternating current and the second alternating current respectively, corresponding contact resistance be believed that it is equal, namely:
R1=R2；
So can obtain:
Pass through the expression formula of the first impedance at this time:
And second impedance expression formula:
Simultaneous can obtain inductance are as follows:
Available, the impedance angle according to the inductance are as follows:
Or
S1324, according to impedance angle and the first impedance or impedance angle and the second impedance, preformed armor rods are calculated and are connect with ground wire
Contact resistance at contravention mouth.
Specifically, preformed armor rods and the contact resistance at ground contact port are as follows:
RC=Z1cosθ
Or
RC=Z2cosθ。
In yet another embodiment, measuring contact resistance method provided by the present application, in any of the above-described embodiment
On the basis of, in step s 110, select the first alternating current first frequency be high frequency value, then by
Wherein, d1For the first skin depth, f1For first frequency, ω is angular frequency, and μ is magnetic conductivity, and γ is conductivity, can
Know:
When first frequency is high frequency value, the first skin depth levels off to 0, then when meeting preset contact resistance variation rate
It is required that when (such as contact resistance variation rate is not more than 5 percent), the expression formula as described in first embodiment:
Known to: corresponding second skin depth of the second alternating current can not level off to 0, therefore, by
Known to: the second frequency of the second alternating current is non-high frequency value.
Therefore, respectively at preformed armor rods and ground contact port first frequency be high frequency value the first alternating current, and
When second frequency is the second alternating current of non-high frequency value, the contact resistance variation rate (contact resistance of preset requirement can satisfy
Change rate is five) no more than percent.
It should be noted that in another embodiment of measuring contact resistance method provided herein, by first
The expression formula of impedance or the second impedance:
Or
Can learn: due to the frequency direct proportionality of reactance ω L and alternating current, and the change rate of contact resistance by
In meeting insignificant preset requirement, therefore, reactance change range caused by high-frequency ac current and non-high-frequency ac current will
The variation range of contact resistance can be far longer than, the variation of impedance is mainly caused by reactance change, the variation pair of negligible resistance
Measurement result does not cause too much influence, so that the measuring contact resistance method provided by the present application, can not only survey
The ac contactor resistance at preformed armor rods and ground contact port is measured, and can be effectively reduced the error in measurement process, thus
Improve the accuracy of measurement.
As shown in fig. 7, the application also provides a kind of measuring contact resistance device, comprising: obtain module 210, measurement module
220 and processing module 230；Module 210 is obtained for the contact resistance variation rate according to preset requirement, obtains the first exchange respectively
The second frequency of the first frequency of electric current and the second alternating current；Measurement module 220 is used for by respectively in preformed armor rods and ground wire
The second alternating current of the first alternating current and second frequency that first frequency is loaded at port is contacted, measurement obtains preformed respectively
Silk and the first voltage and second voltage at ground contact port；Processing module 230 is used for according to first voltage and second voltage,
Obtain the contact resistance at preformed armor rods and ground contact port.
Measuring contact resistance device provided by the present application has used contact described in any of the above-described method implementation electric
Hinder measurement method.Therefore, measuring contact resistance device provided by the present application has described in any of the above-described method implementation
Whole beneficial effects, details are not described herein.
As described above, in measuring contact resistance device provided by the present application, the contact resistance variation rate of preset requirement is
Refer to the contact resistance variation rate no more than 5 percent.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (10)
1. a kind of measuring contact resistance method, which is characterized in that the method is for measuring at preformed armor rods and ground contact port
Contact resistance, which comprises
Obtain the alternating current for meeting two kinds of different frequencies of contact resistance variation rate of preset requirement；
The alternating current based on described two different frequencies is loaded at preformed armor rods and ground contact port, is measured respectively described pre-
First voltage and second voltage at hank knotting and ground contact port；
According to the first voltage and the second voltage, the contact resistance at preformed armor rods and ground contact port is obtained.
2. measuring contact resistance method according to claim 1, which is characterized in that the acquisition meets connecing for preset requirement
The step of touching the alternating current of two kinds of different frequencies of resistance change rate, comprising:
The first frequency of arbitrarily selected first alternating current obtains corresponding according to the first frequency of first alternating current
One skin depth；
According to the contact resistance variation rate of the first skin depth of first alternating current and preset requirement, the second exchange is obtained
Second skin depth of electric current and the corresponding second frequency of second alternating current.
3. measuring contact resistance method according to claim 2, which is characterized in that described according to the first voltage and institute
The step of stating second voltage, obtaining the contact resistance at preformed armor rods and ground contact port, comprising:
Respectively according to the first voltage and first alternating current and the second voltage and second alternating current
Stream calculates separately to obtain the first impedance and the second impedance at corresponding preformed armor rods and ground contact port；
According to first impedance and second impedance, the contact resistance at preformed armor rods and ground contact port is obtained.
4. measuring contact resistance method according to claim 3, which is characterized in that described according to first impedance and institute
The step of stating the second impedance, obtaining the contact resistance at preformed armor rods and ground contact port, comprising:
According to first impedance and second impedance, the inductance at preformed armor rods and ground contact port is calculated, wherein
Calculating process ignores contact resistance variation rate；
According to the inductance and first impedance or the inductance and second impedance, preformed armor rods and ground wire are calculated
Contact the contact resistance at port.
5. measuring contact resistance method according to claim 3, which is characterized in that described according to first impedance and institute
The step of stating the second impedance, obtaining the contact resistance at preformed armor rods and ground contact port, comprising:
According to first impedance and second impedance, the impedance angle at preformed armor rods and ground contact port is calculated,
In, calculating process ignores contact resistance variation rate；
According to the impedance angle and first impedance or the impedance angle and second impedance, be calculated preformed armor rods with
Contact resistance at ground contact port.
6. measuring contact resistance method according to claim 1, which is characterized in that the contact resistance of the preset requirement becomes
Rate refers to the contact resistance variation rate no more than 5 percent.
7. measuring contact resistance method according to claim 2, which is characterized in that the first frequency is high frequency value, institute
Stating second frequency is non-high frequency value.
8. measuring contact resistance method according to claim 1, which is characterized in that the alternating current of described two different frequencies
The current effective value of stream is identical.
9. a kind of measuring contact resistance device characterized by comprising obtain module, measurement module and processing module；
The alternating current for obtaining module and being used to obtain two kinds of different frequencies of the contact resistance variation rate for meeting preset requirement；
The measurement module is used to load the alternating current based on described two different frequencies at preformed armor rods and ground contact port
Stream measures first voltage and second voltage at the preformed armor rods and ground contact port respectively；
The processing module is used to be obtained at preformed armor rods and ground contact port according to the first voltage and the second voltage
Contact resistance.
10. measuring contact resistance device according to claim 9, which is characterized in that the contact resistance of the preset requirement
Change rate refers to the contact resistance variation rate no more than 5 percent.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811344934.1A CN109188096B (en) | 2018-11-12 | 2018-11-12 | Contact resistance measuring method and device |
| CN202010607619.4A CN111707872B (en) | 2018-11-12 | 2018-11-12 | Contact resistance measuring method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811344934.1A CN109188096B (en) | 2018-11-12 | 2018-11-12 | Contact resistance measuring method and device |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010607619.4A Division CN111707872B (en) | 2018-11-12 | 2018-11-12 | Contact resistance measuring method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109188096A true CN109188096A (en) | 2019-01-11 |
| CN109188096B CN109188096B (en) | 2020-07-28 |
Family
ID=64939360
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811344934.1A Active CN109188096B (en) | 2018-11-12 | 2018-11-12 | Contact resistance measuring method and device |
| CN202010607619.4A Active CN111707872B (en) | 2018-11-12 | 2018-11-12 | Contact resistance measuring method and device |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010607619.4A Active CN111707872B (en) | 2018-11-12 | 2018-11-12 | Contact resistance measuring method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN109188096B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112269060A (en) * | 2020-09-09 | 2021-01-26 | 国联汽车动力电池研究院有限责任公司 | Contact resistance and contact conductivity identification method and system |
| TWI729631B (en) * | 2019-12-18 | 2021-06-01 | 致茂電子股份有限公司 | Method for measuring impedance |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113203894B (en) * | 2021-03-19 | 2022-11-18 | 深圳供电局有限公司 | Impedance testing method and testing device thereof |
| CN113705132A (en) * | 2021-08-20 | 2021-11-26 | 广东电网有限责任公司 | Direct current loop resonance analysis method, device, equipment and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103713198A (en) * | 2014-01-08 | 2014-04-09 | 国家电网公司 | Method for measuring phase to phase mutual impedance of long-distance extra-high voltage common-tower double-circuit transmission line |
| CN105675657A (en) * | 2016-01-12 | 2016-06-15 | 中国地质大学（武汉） | Skin effect-based sample surface coating nondestructive test method and system |
| CN107102208A (en) * | 2017-04-25 | 2017-08-29 | 南方电网科学研究院有限责任公司 | The measuring method and device of a kind of impulse earthed resistance |
| CN108344898A (en) * | 2018-01-31 | 2018-07-31 | 华南理工大学 | A kind of preformed armor rods incision position contact resistance experimental measurement method based on heat to electricity conversion |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101398369A (en) * | 2007-09-30 | 2009-04-01 | 通用电气公司 | Device and method for monitoring surface corrosion |
| FR2985032B1 (en) * | 2011-12-23 | 2014-01-17 | Chauvin Arnoux | GROUND CLAMP FOR MEASURING THE EARTH RESISTANCE OF ELECTRICAL INSTALLATIONS |
| CN108334695B (en) * | 2018-02-01 | 2021-07-20 | 华南理工大学 | Finite element setting method based on contact resistance of ground wire and preformed armor rods |
| CN108416097A (en) * | 2018-02-01 | 2018-08-17 | 华南理工大学 | The finite element thermal analysis equivalent method of ground wire and preformed armor rods contact port contact resistance |
| CN108414837B (en) * | 2018-02-06 | 2019-06-18 | 华南理工大学 | A kind of experimental measurement method of aerial earth wire and preformed armor rods contact port contact resistance |
| CN108761241B (en) * | 2018-06-07 | 2021-04-20 | 中国电子科技集团公司第五十四研究所 | Nonlinear effect modeling method of radio frequency coaxial connector |
-
2018
- 2018-11-12 CN CN201811344934.1A patent/CN109188096B/en active Active
- 2018-11-12 CN CN202010607619.4A patent/CN111707872B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103713198A (en) * | 2014-01-08 | 2014-04-09 | 国家电网公司 | Method for measuring phase to phase mutual impedance of long-distance extra-high voltage common-tower double-circuit transmission line |
| CN105675657A (en) * | 2016-01-12 | 2016-06-15 | 中国地质大学（武汉） | Skin effect-based sample surface coating nondestructive test method and system |
| CN107102208A (en) * | 2017-04-25 | 2017-08-29 | 南方电网科学研究院有限责任公司 | The measuring method and device of a kind of impulse earthed resistance |
| CN108344898A (en) * | 2018-01-31 | 2018-07-31 | 华南理工大学 | A kind of preformed armor rods incision position contact resistance experimental measurement method based on heat to electricity conversion |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI729631B (en) * | 2019-12-18 | 2021-06-01 | 致茂電子股份有限公司 | Method for measuring impedance |
| CN112269060A (en) * | 2020-09-09 | 2021-01-26 | 国联汽车动力电池研究院有限责任公司 | Contact resistance and contact conductivity identification method and system |
| CN112269060B (en) * | 2020-09-09 | 2024-01-02 | 国联汽车动力电池研究院有限责任公司 | Contact resistance and contact conductivity identification method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109188096B (en) | 2020-07-28 |
| CN111707872A (en) | 2020-09-25 |
| CN111707872B (en) | 2023-02-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109188096A (en) | Measuring contact resistance method and device | |
| CN109283380A (en) | The measurement method of line current, device, equipment and storage medium in electric system | |
| CN208207050U (en) | A kind of measuring device of line current | |
| CN104215931A (en) | Automatic electric energy meter calibrating device period investigation method | |
| CN206757021U (en) | High voltage ac/dc voltmeter calibration detection means | |
| CN204405731U (en) | The clamp on amperemeter that a kind of linearity is good | |
| CN109828173A (en) | A kind of load-detecting system and its load detection method | |
| CN105651410B (en) | A kind of method of real-time detection overhead transmission line gold utensil conductor joint heating | |
| CN111239560B (en) | Multi-sensor-based partial discharge positioning method | |
| CN105044463B (en) | online resistivity test system | |
| CN208888303U (en) | A kind of current in wire measuring system | |
| CN109655495A (en) | A kind of soil body layering thermal coefficient is in situ quickly to test probe, system and method | |
| CN206019676U (en) | A kind of resistance sensor for being provided with Wheatstone bridge | |
| WO2015192273A1 (en) | Self-adaptive modeling apparatus for three-phase alternating-current electric arc furnace, and simulation algorithm therefor | |
| CN106786587B (en) | The method for reducing resistance element network harmonic | |
| CN209231486U (en) | High accuracy battery AC internal Resistance detection device | |
| CN103925868A (en) | Resistance strain gauge without influence of resistance of long conductor | |
| CN106124092A (en) | A kind of cooling-water temperature sensor test fixture | |
| CN209707421U (en) | Using PSD device to the measurement experiment device of solid linear expansion coefficient | |
| CN207408489U (en) | Circuit board detection equipment | |
| CN207502098U (en) | A kind of portable electronic fluid pressure detection device | |
| CN206523561U (en) | A kind of plain type resistivity detecting device | |
| CN111487468A (en) | Ground network uncertainty measuring method based on resistivity | |
| CN206470351U (en) | Measure powered investigation instrument of visiting one house after another | |
| CN205843830U (en) | A kind of pincerlike thermal detector |
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 |