CN206990679U - A kind of power line steel tower grounding resistance In-circiut tester based on voltage drive - Google Patents
A kind of power line steel tower grounding resistance In-circiut tester based on voltage drive Download PDFInfo
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- CN206990679U CN206990679U CN201720309280.3U CN201720309280U CN206990679U CN 206990679 U CN206990679 U CN 206990679U CN 201720309280 U CN201720309280 U CN 201720309280U CN 206990679 U CN206990679 U CN 206990679U
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Abstract
The utility model discloses a kind of power line steel tower grounding resistance In-circiut tester based on voltage drive, earth resistance tester, earth resistance tester includes Tourniquet clamping head driver unit, without chuck driver unit, electric current sender electrode, voltage sampling electrode and signal processing circuit board, a set of Tourniquet clamping head driver unit is installed on a piece down conductor of power line steel tower, a set of no chuck driver unit is respectively installed on remaining down conductor.The utility model on-line measurement function allows the data of power line steel tower grounding resistance directly to be uploaded by way of Internet of Things, realize network monitoring, effectively substitute the manual inspection mode of electric power tower, it is greatly enhanced the efficiency of detection, in addition, key parameter is obtained by contact measurement, the precision of test is ensure that, greatly reduces difficulty and cost in production.
Description
Technical field
It the utility model is related to the earth resistance technology of power line steel tower, it is more particularly to a kind of based on voltage drive
Power line steel tower grounding resistance In-circiut tester.
Background technology
It is well known that to ensure ultra-high-tension power transmission line safe and stable operation, the harm that thunderbolt is brought, high voltage power transmission iron are reduced
Tower is all equipped with ground networks., will also be each by overhead line in addition to single steel tower ground networks of itself to improve earthing effect
Steel tower is sequentially communicated, and by single steel tower, itself earth mat flows into the earth to earth current, and the ground of neighbouring an iron rake with three to six teeth is passed through also by overhead line
Net flows into the earth.Obviously, the grounding resistance of each steel tower is required for control within the specific limits.Currently employed steel tower ground connection
Resistance measurement mode mainly has two kinds, and a kind of is to disconnect the down conductor of steel tower, using mechanical megger formula or electronically
Resistance instrument is measured by trilinear method, and another kind is that the problem of pincerlike meter occurred in recent years is measured, measured using existing trilinear method is
Down conductor is have to be off, causes manually to participate in, makes detection efficiency low, each steel tower can only detect limited every year
Several times, the measurement of pincerlike meter assumes that the parallel resistance of other steel towers is minimum, and this hypothesis does not tally with the actual situation, meanwhile,
Its metering system is when steel tower has double down conductors even more down conductors, due to the influence of downlead itself, Wu Fajin
Row measurement.
The earth mat resistance of each steel tower is monitored using Internet of Things, the work side of that conventional manual inspection can be substituted
Formula, detection efficiency, frequency and flexibility are greatly enhanced, are a kind of real demand, but must solve what is manually participated in first
Problem, and it is exactly most important premise not turn off down conductor.
Not turning off down conductor for solution just can measure steel tower grounding resistance, and existing patent proposes the base in trilinear method
By increasing the method for examining the electric current that streamline circle measures each downlead on plinth, say it is feasible in principle, but this measuring method
It is required that inspection streamline circle needs very high precision when measuring electric current, thus it is comparatively more complicated on the implementation.Meanwhile tradition
Ground resistance meter can not be in accurate the problem of testing electric power tower grounding resistance under the conditions of not turning off downlead.
Utility model content
The technical problems to be solved in the utility model is the defects of overcoming prior art, there is provided a kind of based on voltage drive
Power line steel tower grounding resistance In-circiut tester.
In order to solve the above-mentioned technical problem, the utility model provides following technical scheme：
A kind of power line steel tower grounding resistance In-circiut tester based on voltage drive of the utility model, including grounding resistance
Tester, the earth resistance tester include Tourniquet clamping head driver unit, without chuck driver unit, electric current sender electrode, voltage
Sampling electrode and signal processing circuit board, the Tourniquet clamping head driver unit from top to bottom comprising it is upper sampling chuck, excitation coil and
Lower sampling chuck, and on a down conductor of power line steel tower, the excitation coil with down conductor is non-connects
Touch, the upper sampling chuck and lower sampling chuck are fastenedly connected with down conductor, and the no chuck driver unit then only wraps
It is non-contact with down conductor containing an excitation coil, and on the other down conductor of power line steel tower, connect to double
The situation of ground downlead, it is only necessary to which one without chuck driver unit, to the situation of more down conductors, is then swashed except being provided with chuck
Encourage outside that root down conductor of part, remaining each down conductor is both needed to installation one without chuck driver unit, described
Electric current sender electrode and voltage sampling electrode determine that distance is inserted into ground necessarily according to conventional three-wire method earthing test standard
Depth, the test under single sine wave freuqency are divided into two stages, in the first stage, tested to connect between steel tower, other steel towers and tower
Wiring forms an electric loop, contains two resistance in loop model, a grounding resistance Rg for tested steel tower, another
The individual equivalent resistance Rt to be made up of the other steel towers and overhead line in addition to tested steel tower, this stage current sender electrode disconnect not
Work, excitation coil in the Tourniquet clamping head driver unit and excited in the loop without the excitation coil in chuck driver unit
Go out electromotive force, now, upper sampling chuck is connected with the ground of signal processing circuit board, the electricity that the lower sampling chuck is taken out
Pressure signal is the electromotive force that coil excitation goes out, and the voltage that voltage sampling electrode is taken out is then on tested steel tower grounding resistance
Pressure drop, this two paths of signals is sent into signal processing circuit board and handled, and can obtain in loop model two resistance Rg, Rt
Ratio, second stage, the excitation coil and upper sampling chuck disconnect and not worked, and the electric current sender electrode, voltage take
Sample electrode, lower sampling chuck connection, it is two resistance Rg, Rt that resistance Rg, Rt, which form resistance in parallel, measured in this stage,
Parallel value Ra, hereafter, utilize the connection in series-parallel relation in two stages, it is possible to calculate a grounding resistance of tested steel tower
Rg, in order to improve jamproof ability, above-mentioned test process is repeated using multiple random frequencies, obtains a series of grounding resistance
Value, by statistical disposition, provides an optimal testing result, the measurement output valve as tested steel tower grounding resistance.
As a kind of optimal technical scheme of the present utility model, the Tourniquet clamping head driver unit and without in chuck driver unit
Excitation coil, the multi-turn enamel-covered wire wound by iron core and outside collectively forms, the Tourniquet clamping head driver unit and without chuck
Driver unit is made up of two independences and identical semicolumn part in structure.
As a kind of optimal technical scheme of the present utility model, the Tourniquet clamping head driver unit and without in chuck driver unit
Excitation coil, parameter also requires identical, and each excitation coil is driven using same driving source.
As a kind of optimal technical scheme of the present utility model, the drive voltage signal of the excitation coil is believed for sine wave
Number, the signal is provided by signal processing circuit board, can inspire the electromotive force of sine wave in the loop.
As a kind of optimal technical scheme of the present utility model, signal frequency is randomly provided in bandpass filter passband, it is more
The processing of same flow obtains a resistance value sequence under individual different frequency sine wave signal, then carries out statistical disposition.
Operation principle of the present utility model is：Power line steel tower is due to the presence of overhead line so that is grounded in tested steel tower
When downlead does not turn off, a circuit loop containing two resistance is equivalent to, a resistance is the grounding resistance of tested steel tower
Rg, another is an equivalent resistance Rt caused by remaining steel tower in addition to tested steel tower and overhead line collective effect, using excitation
Coil inspires electromotive force in the loop, the suitable voltage measurement point of reselection, can measure the two resistance Rt, Rg ratio
Value ρ, when only turning on electric current sender electrode, lower sampling chuck and voltage sampling electrode, lower sampling chuck connects a sample resistance
To signal processing circuit board publicly, electric current sender electrode sends electric current to Rs, voltage and sampling electricity on voltage sampling electrode
The ratio of voltage in resistance, representative is Rt | | Rg+Rs and Rs ratio；Obtaining the ratio of two resistance and two resistance
After parallel resistance value, it can resolve to obtain the ground networks resistance value Rg of tested steel tower；Under the conditions of multiple random frequencies
Test, a series of computing the resistor value result can be obtained, statistical disposition algorithm use to these results, provide one optimize estimate
Value, antijamming capability can be improved by so doing；Test process under each frequency is divided into two stages, first stage,
Signal processor control relay, connect excitation coil, upper sampling chuck, lower sampling chuck, voltage sampling electrode, remaining connects
Line disconnects, this sample chuck and signal processing circuit board at present publicly between without sample resistance Rs, upper sampling chuck and signal
The ground of process circuit plate is connected, and with sine wave drive excitation coil, is taken respectively at lower sampling chuck and voltage sampling electrode
Voltage signal vd, vp1, it is sent into by bandpass filtering and A/D conversions in signal processor, processing obtains the ratio ρ of two resistance
=Rt/Rg=(vd-vp1)/vp1, second stage, signal processor control relay, makes electric current sender electrode, voltage sampling
Electrode is connected with lower sampling chuck, and remaining wiring disconnects, and this samples chuck and is connected to a sample resistance Rs to signal transacting at present
Publicly, sine wave is sent circuit board through signal code sender electrode, is picked up from voltage sampling electrode and sample resistance Rs
Voltage signal vp2, vs, by the first stage, same bandpass filter and A/D change circuit and are sent into signal processor, are calculated
The resistance of two resistor coupled in parallel turns Ra=Rt | | Rg=Rs (vp2/vs-1)；Based on connection in series-parallel relation, tested steel tower is obtained
Grounding resistance Rg=Ra × (1+1/ ρ)；A wherein downlead for steel tower installs a Tourniquet clamping head driver unit, under remaining draws
Respectively installation one without chuck driver unit, the excitation coil in these driver units, is driven line using same driving source, and each
The parameter of excitation coil is consistent, and it is hereby ensured that the current potential at lower sampling chuck is connected with downlead the tie point of ground networks
The difference of place's current potential can be ignored, and the potential difference of the current potential and steel tower at upper sampling chuck can be ignored.
Compared with prior art, the beneficial effects of the utility model are as follows：
1. the utility model on-line measurement function allows the side that the data of power line steel tower grounding resistance pass through Internet of Things
Formula directly uploads, realizes network monitoring, effectively substitutes the manual inspection mode of electric power tower, be greatly enhanced detection efficiency,
Frequency and flexibility ratio, make the grounding resistance monitoring of power line steel tower more convenient reliable.
2. the utility model determines the resistance of resistance ratio and resistor coupled in parallel by measuring voltage ratio, key parameter is all
Obtained by contact measurement, ensure that the precision of test, and the electromotive force size come is motivated to excitation coil in theory and not had
Have quantitative requirement, if having certain amplitude just can meet test needs, therefore implement it is simpler reliably, drop significantly
Difficulty and cost in low production.
3. repeatedly being measured under the conditions of multiple random frequencies with same flow, multiple grounding resistance measuring and calculating values are obtained, are used in combination
Statistic algorithm obtains an optimal estimate, and this mode can further improve jamproof ability, even if there is multiple iron
Tower measures at the same time, it is also possible to obtain the accurate earth resistance result of tested steel tower, ensure that on test philosophy
No longer need that down conductor and steel tower are disconnected and could measured, reached direct-on-line test ground networks resistance value size
Purpose.
Brief description of the drawings
Accompanying drawing is used for providing further understanding to of the present utility model, and a part for constitution instruction, with this practicality
New embodiment is used to explain the utility model together, does not form to limitation of the present utility model.In the accompanying drawings：
Fig. 1 is test wiring schematic diagram of the present utility model；
Fig. 2 is measuring loop equivalent resistance schematic diagram of the present utility model；
Fig. 3 is the signal flow schematic diagram of coil stimulating stage test of the present utility model；
Fig. 4 is the signal flow schematic diagram of coil excitation phase test of the present utility model；
In figure：1st, earth resistance tester；2nd, Tourniquet clamping head driver unit；3rd, without chuck driver unit；4th, electric current sends electricity
Pole；5th, voltage sampling electrode；6th, signal processing circuit board；7th, upper sampling chuck；8th, excitation coil；9th, lower sampling chuck；10、
Bandpass filter.
Embodiment
Preferred embodiment of the present utility model is illustrated below in conjunction with accompanying drawing, it will be appreciated that described herein excellent
Select embodiment to be merely to illustrate and explain the utility model, be not used to limit the utility model.
Embodiment 1
As Figure 1-4, the utility model provides a kind of power line steel tower grounding resistance based on voltage drive and surveyed online
Try instrument, including earth resistance tester 1, earth resistance tester 1 include Tourniquet clamping head driver unit 2, without chuck driver unit 3,
Electric current sender electrode 4, voltage sampling electrode 5 and signal processing circuit board 6, Tourniquet clamping head driver unit 2 include above take from top to bottom
Sample chuck 7, excitation coil 8 and lower sampling chuck 9, and on a down conductor of power line steel tower, excitation coil 8
Non-contact with down conductor, upper sampling chuck 7 and lower sampling chuck 9 are fastenedly connected with down conductor, no chuck excitation
Part 3 then only includes an excitation coil 8, and on the other down conductor of power line steel tower, with down conductor
It is non-contact, to the situation of double down conductors, it is only necessary to which one, without chuck driver unit 3, to the situation of more down conductors, is then removed
It is provided with outside that root down conductor of chuck driver unit 2, remaining each down conductor is both needed to installation one without folder
Head driver unit 3, electric current sender electrode 4 and voltage sampling electrode 5 determine distance so according to conventional three-wire method earthing test standard
Insert certain depth in ground afterwards, the test under single sine wave freuqency is divided into two stages, in the first stage, be tested steel tower, its
Its steel tower and overhead line form an electric loop, and two resistance, the ground connection for tested steel tower are contained in loop model
Resistance Rg, another is the equivalent resistance Rt being made up of the other steel towers and overhead line in addition to tested steel tower, and this stage current is sent out
Sending electrode 4, which disconnects, not to work, excitation coil 8 in Tourniquet clamping head driver unit 2 and without the excitation coil in chuck driver unit 3
8 inspire electromotive force in the loop, and now, upper sampling chuck 7 is connected with the ground of signal processing circuit board 6, lower sampling folder
First 9 voltage signals taken out are the electromotive force that coil excitation goes out, and the voltage that voltage sampling electrode 5 is taken out is then tested
Pressure drop on steel tower grounding resistance, this two paths of signals are sent into signal processing circuit board 6 and handled, can be obtained in loop model
Two resistance Rg, Rt ratio, second stage, excitation coil 8 and upper sampling chuck 7 disconnect and not worked, and electric current sends electricity
Pole 4, voltage sampling electrode 5, lower sampling chuck 9 connect, and it is two that resistance Rg, Rt, which form resistance in parallel, measured in this stage,
Individual resistance Rg, Rt parallel value Ra, hereafter, utilize the connection in series-parallel relation in two stages, it is possible to calculate the one of tested steel tower
Individual grounding resistance Rg, in order to improve jamproof ability, above-mentioned test process is repeated using multiple random frequencies, obtains a system
The grounding resistance of row, by statistical disposition, an optimal testing result is provided, the measurement as tested steel tower grounding resistance
Output valve.
Tourniquet clamping head driver unit 2 and without the excitation coil 8 in chuck driver unit 3, winds more by iron core and outside
Circle enamel-covered wire collectively forms, Tourniquet clamping head driver unit 2 and in structure be independent and identical by two without chuck driver unit 3
Semicolumn part form, a complete component is tightened to after being installed on down conductor, one is played and complete swashs
Encourage the same function of part.
Tourniquet clamping head driver unit 2 and without the excitation coil 8 in chuck driver unit 3, parameter also requires identical, each excitation
Coil 8 is driven using same driving source.
The drive voltage signal of excitation coil 8 is sine wave signal, and the signal is provided by signal processing circuit board 6, can
The electromotive force of sine wave is inspired in the loop, can effectively improve jamproof ability.
It is randomly provided signal frequency in the passband of bandpass filter 10, same flow under multiple different frequency sine wave signals
Processing obtains a resistance value sequence, then carries out statistical disposition.
Specifically, as shown in Figure 1：Tourniquet clamping head driver unit 2 is installed respectively on two down conductors and swashed without chuck
Part 3 is encouraged, notices that installation direction does not turn-over, it is (right further according to the mode of connection insertion electric current sender electrode 4 of traditional ground resistance meter
Induced current pole C) and voltage sampling electrode 5 (corresponding voltage pole P).Tourniquet clamping head driver unit 2, without chuck driver unit 3, electric current send out
Sending electrode 4 and voltage sampling electrode 5 is all leaded is connected by connector with tester main frame, signal processing circuit board 6 is pacified
In tester main frame.Tourniquet clamping head driver unit 2 is consistent with the parameter without the excitation coil 8 in chuck driver unit 3.Band
Chuck driver unit 2 and be all independent part without chuck driver unit 3, except the upper sampling chuck 7 of key, excitation coil 8, take
Outside sample chuck and lead-out wire, it should also include the attached part such as fastening, waterproof, to ensure that installation is convenient reliably and can be out of office
Outer long-term use.
As shown in Figure 2：One resistance is tested steel tower grounding resistance Rg, another for remaining steel tower grounding resistance and
The equivalent resistance Rt of the compositions such as overhead line.After upper sampling chuck 7 is connected with the ground of signal processing circuit board 6, with excitation
Coil 8 motivates electromotive force in the loop, similar to adding a voltage source in the loop, the electricity on two resistance Rg, Rt
Pressure ratio value is equal with the ratio of two resistance.If cancel the effect of excitation coil 8 and upper voltage sampling electrode 5, and by electric current
Sender electrode 4 sends electric current, returns to the ground of signal processing circuit board 6 after a sample resistance Rs from lower sampling chuck 9, this
When both of the aforesaid resistance Rg, Rt parallel relationship is in new loop, by the voltage vs on sample resistance Rs and from voltage
The ratio for the voltage vp2 that sampling electrode 5 is taken, two resistance Rg, Rt resistance Ra=Rt in parallel can be calculated | | Rg.Profit
The resistance value ratio obtained with above-mentioned two situations and resistance in parallel, with reference to connection in series-parallel relation, the ground connection of tested steel tower can be conversed
Resistance Rg=Ra × (1+1/ ρ).
As shown in Figure 3：Now loop model be resistance Rg, Rt series connection, excitation coil 8 produce in the loop one it is electronic
Gesture.It it is the coil stimulating stage into the first stage so that FPGA makees signal processing chip as an example, FPGA control relays make excitation line
Circle 8, upper sampling chuck 7, lower sampling chuck 9, the circuit of voltage sampling electrode 5 are connected, and remaining line disconnects, now upper sampling chuck
7 connect with the ground of signal processing circuit board 6；After connecting stabilization, FPGA produces a sinusoidal wave data sequence, is changed by D/A
Circuit output sine wave, the frequency of the sine wave have randomness, but in bandpass filter flat gain area；After conversion
Sine wave provides sufficiently large electric current and the sine waveform of intimate standard through overdrive circuit again, while drives Tourniquet clamping head to encourage
Part 2 and without the excitation coil 8 in chuck driver unit 3；By the voltage got at voltage sampling electrode 5 letter vp1 processes one
It is sent into FPGA, the voltage signal vd that will be got at lower voltage sampling electrode 5, passes through after road bandpass filtering and all the way A/D conversions
It is sent into after another way bandpass filtering and another way A/D conversions in FPGA；FPGA is solved using Fourier Transform Algorithm, and conversion obtains
Two resistance Rg, Rt ratio ρ=Rt/Rg=(vd-vp1)/vp1 in loop model.
As shown in Figure 4：Now loop model is resistance Rg, Rt in parallel.It is coil excitation phase into second stage,
FPGA control relays make lower sampling chuck 9, electric current sender electrode 4 be connected with the line of voltage sampling electrode 5, and remaining wiring is broken
Open, this samples chuck 9 and has met a sample resistance Rs to the ground of signal processing circuit board 6 at present；After relay is connected, FPGA is still
Sine wave signal is produced with same circuit, and the signal is by electric current sender electrode 4 to the earth, by ground resistance network Rg and equivalent
Return to the ground of signal processing circuit board 6 after resistance Rt by sample resistance Rs again by lower sampling chuck 9, now resistance Rg, Rt
Form parallel-connection structure；The voltage signal vp2 that voltage sampling electrode 5 obtains is sent into FPGA after bandpass filtering and A/D conversions,
Voltage signal vs on sample resistance Rs is sent into FPGA after another way bandpass filtering and A/D conversions；FPGA processing is sent into
Two paths of signals, conversion obtain the value Ra=Rt of parallel resistance | | Rg=Rs (vp2/vs-1).After the completion of two stage tests,
The value Ra=Rt for the parallel resistance that the ratio ρ=Rt/Rg and second stage for two resistance being calculated by the first stage are obtained |
| Rg, using connection in series-parallel relation, resolve and obtain measured value Rg=Ra × (a 1+1/ ρ) of tested steel tower ground resistance.
Changing sine wave freuqency and remake above-mentioned same measurement, flow is identical, and only sine wave freuqency changes at random,
The data that FPGA inputs according to A/D randomly produce a new sinusoidal wave data sequence, and its frequency still needs to be limited to foregoing model
Within enclosing, a new measured value of tested steel tower ground resistance is obtained according to aforementioned process；Tested steel tower can and so on be obtained
One sequence sets of resistance, the resistance value of tested steel tower final output is obtained by statistical disposition mode.
The measuring circuit in two stages in measuring above is integral, is only reached each by Control break-make
Circuit function.When not measuring, each relay is all to disconnect, and circuit board disconnects with all aerial lugs, in relay
Piezo-resistance is added afterwards carrys out further protection circuit plate.
Signal processor can use FPGA, can also use the chip such as single-chip microcomputer, DSP, no matter using any chip,
Fourier transformation, the calculating of resistance value and statistical method can be completed by, which requiring, obtains final resistance calculations result.
In addition, parameter phase in each driver unit on down conductor is arranged on sine-wave excitation by same driving source
Same excitation coil 8, then coordinated by upper sampling chuck 7, lower sampling chuck 9 and voltage sampling electrode 5 in test loop model
Ratio ρ=Rt/Rg of resistance, with the use of electric current sender electrode 4, voltage sampling electrode 5, lower sampling chuck 9 and sample resistance
Measure the resistance Ra=Rt in parallel of two resistance in loop | | Rg, solve to obtain tested steel tower using connection in series-parallel relation
Resistance value Rg.
1. the utility model on-line measurement function allows the side that the data of power line steel tower grounding resistance pass through Internet of Things
Formula directly uploads, realizes network monitoring, effectively substitutes the manual inspection mode of electric power tower, be greatly enhanced detection efficiency,
Frequency and flexibility ratio, make the grounding resistance monitoring of power line steel tower more convenient reliable.
2. the utility model determines the resistance of resistance ratio and resistor coupled in parallel by measuring voltage ratio, key parameter is all
Obtained by contact measurement, ensure that the precision of test, and the electromotive force size come is motivated to excitation coil in theory and not had
Have quantitative requirement, if having certain amplitude just can meet test needs, therefore implement it is simpler reliably, drop significantly
Difficulty and cost in low production.
3. repeatedly being measured under the conditions of multiple random frequencies with same flow, multiple grounding resistance measuring and calculating values are obtained, are used in combination
Statistic algorithm obtains an optimal estimate, and this mode can further improve jamproof ability, even if there is multiple iron
Tower measures at the same time, it is also possible to obtain the accurate earth resistance result of tested steel tower, ensure that on test philosophy
No longer need that down conductor and steel tower are disconnected and could measured, reached direct-on-line test ground networks resistance value size
Purpose.
Finally it should be noted that：Preferred embodiment of the present utility model is the foregoing is only, is not limited to this
Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art
For, it can still modify to the technical scheme described in foregoing embodiments, or to which part technical characteristic
Carry out equivalent substitution.All any modification, equivalent substitution and improvements within the spirit and principles of the utility model, made etc.,
It should be included within the scope of protection of the utility model.
Claims (5)
1. a kind of power line steel tower grounding resistance In-circiut tester based on voltage drive, including earth resistance tester (1), its
It is characterised by, the earth resistance tester (1) includes Tourniquet clamping head driver unit (2), sent out without chuck driver unit (3), electric current
Sending electrode (4), voltage sampling electrode (5) and signal processing circuit board (6), the Tourniquet clamping head driver unit (2) are wrapped from top to bottom
Containing upper sampling chuck (7), excitation coil (8) and lower sampling chuck (9), and installed in a down conductor of power line steel tower
On, the excitation coil (8) and down conductor are non-contact, it is described it is upper sampling chuck (7) and it is lower sample chuck (9) with ground connection
Downlead is fastenedly connected, and the no chuck driver unit (3) then only includes an excitation coil (8), and is arranged on power line iron
It is non-contact with down conductor on the other down conductor of tower, to the situation of double down conductors, it is only necessary to which one is swashed without chuck
Part (3) is encouraged, to the situation of more down conductors, then in addition to that root down conductor for being provided with chuck driver unit (2),
Remaining each down conductor is both needed to installation one and taken without chuck driver unit (3), the electric current sender electrode (4) and voltage
Sample electrode (5) determines that distance is inserted into certain depth in ground, single sinusoidal wave frequency according to conventional three-wire method earthing test standard
Test under rate is divided into two stages.
2. a kind of power line steel tower grounding resistance In-circiut tester based on voltage drive according to claim 1, it is special
Sign is, the Tourniquet clamping head driver unit (2) and without the excitation coil (8) in chuck driver unit (3), by iron core and outside
The multi-turn enamel-covered wire of winding collectively forms, and the Tourniquet clamping head driver unit (2) and without chuck driver unit (3) is in structure
It is made up of two independences and identical semicolumn part.
3. a kind of power line steel tower grounding resistance In-circiut tester based on voltage drive according to claim 2, it is special
Sign is, the Tourniquet clamping head driver unit (2) and without the excitation coil (8) in chuck driver unit (3), and parameter also requires phase
Together, each excitation coil (8) is driven using same driving source.
4. a kind of power line steel tower grounding resistance In-circiut tester based on voltage drive according to claim 3, it is special
Sign is that the drive voltage signal of the excitation coil (8) is sine wave signal, and the signal is carried by signal processing circuit board (6)
For the electromotive force of sine wave can be inspired in the loop.
5. a kind of power line steel tower grounding resistance In-circiut tester based on voltage drive according to claim 1, it is special
Sign is, is randomly provided signal frequency in bandpass filter (10) passband, same flow under multiple different frequency sine wave signals
Processing obtain a resistance value sequence, then carry out statistical disposition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720309280.3U CN206990679U (en) | 2017-03-28 | 2017-03-28 | A kind of power line steel tower grounding resistance In-circiut tester based on voltage drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720309280.3U CN206990679U (en) | 2017-03-28 | 2017-03-28 | A kind of power line steel tower grounding resistance In-circiut tester based on voltage drive |
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| Publication Number | Publication Date |
|---|---|
| CN206990679U true CN206990679U (en) | 2018-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720309280.3U Expired - Fee Related CN206990679U (en) | 2017-03-28 | 2017-03-28 | A kind of power line steel tower grounding resistance In-circiut tester based on voltage drive |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110086005A (en) * | 2019-04-24 | 2019-08-02 | 吕奇华 | A kind of double grounding safety systems promoting reliability |
| CN110261680A (en) * | 2019-07-08 | 2019-09-20 | 金茂联合(北京)科技发展有限公司 | Detection method, device, system and the monitoring network of earthed system resistance parameter |
| CN110261680B (en) * | 2019-07-08 | 2024-04-12 | 金茂联合(北京)科技发展有限公司 | Method, device and system for detecting resistance parameters of grounding system and monitoring network |
-
2017
- 2017-03-28 CN CN201720309280.3U patent/CN206990679U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110086005A (en) * | 2019-04-24 | 2019-08-02 | 吕奇华 | A kind of double grounding safety systems promoting reliability |
| WO2020215527A1 (en) * | 2019-04-24 | 2020-10-29 | 吕奇华 | Double-ground safety system capable of improving reliability |
| CN110261680A (en) * | 2019-07-08 | 2019-09-20 | 金茂联合(北京)科技发展有限公司 | Detection method, device, system and the monitoring network of earthed system resistance parameter |
| CN110261680B (en) * | 2019-07-08 | 2024-04-12 | 金茂联合(北京)科技发展有限公司 | Method, device and system for detecting resistance parameters of grounding system and monitoring network |
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