CN104678182B - Method for measuring tower grounding resistance without disassembling grounding wire - Google Patents
Method for measuring tower grounding resistance without disassembling grounding wire Download PDFInfo
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- CN104678182B CN104678182B CN201510051500.2A CN201510051500A CN104678182B CN 104678182 B CN104678182 B CN 104678182B CN 201510051500 A CN201510051500 A CN 201510051500A CN 104678182 B CN104678182 B CN 104678182B
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- earth lead
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Abstract
The invention discloses a method for measuring tower grounding resistance without disassembling a grounding wire. The method is characterized by supplying power to multiple voltage jaws through the same power supply, and enabling equivalent voltage sources, which act on all grounding wires, of all the voltage jaws to be completely equal, wherein the number of the voltage jaws is greater than or equal to the number of all grounding wires of a to-be-tested tower. No matter how many the grounding wires of the tower are, the grounding resistance of the tower can be measured, each grounding wire does not need to be disconnected, and the problem existing in the prior art can be solved; meanwhile, the structure is simple, the operation is convenient, and the requirement on the level of a user is not high.
Description
Technical field
The present invention relates to a kind of pole tower ground resistance measurement method for not dismantling earth lead, has many especially for tested shaft tower
During root earth lead, measurement process does not dismantle the measuring method of earth lead.
Background technology
Current on the market double jaw ground resistance tester high precisions, strong antijamming capability, it is simple to operate be easy to carry about with one,
Digital processing capabilities are powerful, ground loop resistance can be detected in the case of not power-off, it is to avoid consumption is needed in traditional method
The shortcomings of taking a large amount of engineering laying auxiliary earth polars, need disconnection grounding body to be connected with electrical equipment, present needs are both adapted to constantly
The requirement of the work of electric power system of electricity, saves many manpower and materials, again with larger practical value.
But the shaft tower sometimes surveyed often more than one earth lead, when a plurality of earth lead is run into, using double jaws
Earth resistance tester requires the grounding device of tested shaft tower all earth lead wholes and bar in addition to tested earth lead when measuring
Tower disconnects, and with tested ground connection line parallel, as integral ground device earth resistance measuring, i.e., only retain one
Earth lead is connected with shaft tower.At this moment the advantage (need not disconnect earth lead) of double jaw ground resistance testers is just difficult to body
It is existing, also sometimes the earth lead of shaft tower is also not allow to disconnect or be difficult to disconnecting, and at this moment common double jaw earth resistances are surveyed
Examination instrument cannot just measure pole tower ground resistance.
Therefore it is badly in need of one kind at present in the case where all of earth lead is not all turned off, the measurement of grounding resistance can be measured
Method.
The content of the invention
For the problems referred to above, the present invention provides a kind of pole tower ground resistance measurement method for not dismantling earth lead, no matter bar
How many root tower earth lead can measure pole tower ground resistance, and every earth lead need not all disconnect, to user of service
Level requirement is not high, easy to operate.
To realize above-mentioned technical purpose, above-mentioned technique effect is reached, the present invention is achieved through the following technical solutions：
A kind of pole tower ground resistance measurement method for not dismantling earth lead, it is characterised in that by same power supply
Multiple voltage clamp confessions electricity is given, makes the equivalent voltage source that each voltage jaw is acted on every earth lead essentially equal, wherein,
Quantity of the quantity of voltage jaw more than or equal to all earth leads of shaft tower to be measured.
It is preferred that, specifically include following steps：
S01：The voltage jaw of identical quantity is selected according to the radical of earth lead, is clipped on every earth lead respectively, its
In, all of voltage jaw is connected with the voltage socket of earth resistance tester main frame；
S02：Apart from voltage jaw bottom certain distance, electric current jaw is clipped on any one earth lead, the electric current
Jaw is connected with the current sockets of earth resistance tester main frame；
S03：Earth resistance tester main frame is opened, the resistance value shown on main frame is read；
S04：With the resistance value shown on main frame divided by the radical of earth lead, that is, obtain earth resistance finally to be measured
Value.
The invention has the beneficial effects as follows：
No matter how many root of tower grounding line can measure pole tower ground resistance, and every earth lead need not all break
Open, largely overcome the problem of prior art presence, and it is simple structure, easy to operate, it is not high to user of service's level requirement.
Description of the drawings
Fig. 1 is the pole tower ground resistance measuring principle equivalent circuit diagram that the present invention does not dismantle earth lead；
Fig. 2 is the requirement for measuring shaft tower quantity in parallel on directly grounded lightning conducter in the track section of place；
Fig. 3 is a kind of structural representation of the pole tower ground resistance measurement apparatus for not dismantling earth lead of the present invention；
Fig. 4 is that the present invention is used for schematic diagram when measuring；
Fig. 5 is the enlarged drawing of left part in Fig. 4；
The labelling implication of accompanying drawing is as follows：
1：Earth resistance tester main frame；2：Voltage jaw；3：Electric current jaw；4：Multiplex roles adapter；5：Upper wire；6：
Lower wire；7：Earth resistance；8：Earth lead；9：Equivalent voltage source；10：Electric current jaw electric current to be measured.
Specific embodiment
Technical solution of the present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, wherein take connecing
The quantity of ground wire is illustrated for 2, so that those skilled in the art can be better understood from the present invention and can be practiced,
But illustrated embodiment is not as a limitation of the invention.
A kind of pole tower ground resistance measurement apparatus for not dismantling earth lead, Fig. 1 assume that shaft tower during two earth leads 8
Grounding resistance measurement equivalent circuit diagram, in the entire network, earth resistance to be surveyed 7, if its resistance is R, other each groundings
Resistor coupled in parallel value is R0=R1//R2//R3//...//Rn, when n is larger, R0＜ ＜ R.When on lightning conducter in surveyed track section
When shaft tower quantity in parallel meets Fig. 2, it is possible to using split-core type meter measurement of Grounding Resistance 7.
The present invention is powered to multiple voltage jaws 2 by same power supply, each voltage jaw 2 is acted on per root
Equivalent voltage source on earth lead 8 is essentially equal, wherein, the quantity of voltage jaw 2 is connect more than or equal to all of shaft tower to be measured
The quantity of ground wire 8, no matter to be clipped in the earth resistance numerical value that main frame is measured on which root earth lead all equal for electric current jaw.
It is described as follows：Do not dismantle 7 measuring principle of pole tower ground resistance of earth lead 8 by same power supply to
Multiple voltage jaws 2 are powered, and make each voltage jaw 2 act on the equivalent voltage source 9 on every earth lead 8 essentially equal, table
U is shown as, two essentially equal voltage sources are in parallel, and its total voltage is constant.Electric current in each equivalent voltage source 9 is the electricity of Fig. 1
Stream jaw electric current to be measured 10 must be equal, is expressed as I, no matter so electric current jaw 3 is clipped in what main frame on which root earth lead 8 was measured
7 numerical value of earth resistance is all equal, the current value that all electric currents are flow through in summing to earth resistance 7.If there are n root earth leads
8, the electric current for flowing through each equivalent voltage source 9 is n/mono- for flowing through 7 electric current of earth resistance, therefore the current value that main frame is measured
R*=U/I, actual earth resistance R=R*/ n=U/ (nI).
As shown in figure 3, a kind of pole tower ground resistance measurement apparatus for not dismantling earth lead, including earth resistance tester master
Machine 1, its at least provided with a current sockets and voltage socket, wherein, voltage socket is connected with multiplex roles adapter 4, electric current insert
Mouth is connected with electric current jaw 3.Multiplex roles adapter 4 plays a part of to expand interface, and its interface quantity can be according to actual measurement
Need to arrange, or, can cascade to meet the quantitative requirement of interface by multiple multiplex roles adapters 4.
Multiplex roles adapter 4 is connected with several voltage jaws 2, and the quantity of the voltage jaw 2 is equal to or more than to be measured
The radical of the earth lead 8 of shaft tower, it is preferable that the voltage jaw 2 is removably arranged on multiplex roles adapter 4, measurement
When, the quantity of voltage jaw 2 is equal to the radical of earth lead 8.When earth resistance tester main frame 1 includes multiple voltage sockets,
If the voltage source of voltage socket is identical, voltage jaw 2 directly can be connected with voltage socket.
In order to avoid each impact of 8 internal resistance of earth lead to electric current in equivalent voltage source 9 as far as possible, it is preferable that measurement apparatus are also
Including upper wire 5 and lower wire 6, wherein, upper wire 5 is used for the earth lead 8 for connecting all 2 upper ends of voltage jaw, and lower wire 6 is used
In all of earth lead 8 in 3 lower end of connection electric current jaw, i.e., all of earth lead 8 is located under passing through at the lower section of electric current jaw 3 and leads
Line 6 connects.
As shown in Figure 4 and Figure 5, a kind of pole tower ground resistance measurement method for not dismantling earth lead, comprises the steps：
S01：The voltage jaw 2 of equal number is selected according to the radical of earth lead 8, is clipped on every earth lead 8 respectively, its
In, all of voltage jaw 2 is connected with the voltage socket of earth resistance tester main frame 1；
S02：Apart from 2 bottom certain distance of voltage jaw, electric current jaw 3 is clipped on any one earth lead 8, the electricity
Stream jaw 3 is connected with the current sockets of earth resistance tester main frame 1；
S03：Earth resistance tester main frame 1 is opened, the resistance value shown on main frame is read；
S04：With the resistance value shown on main frame divided by the radical of earth lead 8, that is, obtain earth resistance 7 finally to be measured
Value.
It is preferred that, also comprise the steps between step S02 and step S03：Connect all voltage jaws 2 with wire 5
The earth lead 8 of upper end, all of earth lead in 3 lower end of the connection of lower wire 6 electric current jaw 8.
In step S01, all of voltage jaw 2 is by multiplex roles adapter 4 and the electricity of earth resistance tester main frame 1
Pressure socket is connected, and accordingly, when 8 quantity of earth lead reaches certain numerical value, is cascaded by multiple multiplex roles adapters 4 and is caused often
Individual voltage jaw 2 is connected with the voltage socket of earth resistance tester main frame 1.
The invention has the beneficial effects as follows：No matter how many root of tower grounding line 8 can measure pole tower ground resistance 7, and
And every earth lead 8 need not all disconnect, the problem of prior art presence is largely overcomed, and it is simple structure, easy to operate,
It is not high to user of service's level requirement.Reequiped on the basis of existing earth resistance tester, reequiped low cost, with good
Good market prospect.
The preferred embodiments of the present invention are these are only, the scope of the claims of the present invention is not thereby limited, it is every using this
Equivalent structure or equivalent flow conversion that bright description and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, be included within the scope of the present invention.
Claims (2)
1. a kind of pole tower ground resistance measurement method for not dismantling earth lead, it is characterised in that given by same power supply
Multiple voltage jaws（2）Power supply, makes each voltage jaw（2）Act on every earth lead（8）On the complete phase of equivalent voltage source
Deng, wherein, voltage jaw（2）Quantity more than or equal to shaft tower to be measured all earth leads（8）Quantity；
Specifically include following steps：
S01：According to earth lead（8）Radical select identical quantity voltage jaw（2）, every earth lead is clipped in respectively（8）
On, wherein, all of voltage jaw（2）With earth resistance tester main frame（1）Voltage socket be connected；
S02：Apart from voltage jaw（2）Bottom certain distance, by electric current jaw（3）It is clipped in any one earth lead（8）On, it is described
Electric current jaw（3）With earth resistance tester main frame（1）Current sockets be connected；
S03：Open earth resistance tester main frame（1）, read the resistance value shown on main frame；
S04：With the resistance value shown on main frame divided by earth lead（8）Radical, that is, obtain earth resistance finally to be measured（7）
Value；
Also comprise the steps between step S02 and step S03：Use wire（5）Connect all voltage jaws（2）Upper end
Earth lead（8）, lower wire（6）Connection electric current jaw（3）The all of earth lead in lower end（8）.
2. a kind of pole tower ground resistance measurement method for not dismantling earth lead according to claim 1, it is characterised in that
In step S01, all of voltage jaw（2）By multiplex roles adapter and earth resistance tester main frame（1）Voltage socket
It is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510051500.2A CN104678182B (en) | 2015-01-30 | 2015-01-30 | Method for measuring tower grounding resistance without disassembling grounding wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510051500.2A CN104678182B (en) | 2015-01-30 | 2015-01-30 | Method for measuring tower grounding resistance without disassembling grounding wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104678182A CN104678182A (en) | 2015-06-03 |
| CN104678182B true CN104678182B (en) | 2017-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510051500.2A Expired - Fee Related CN104678182B (en) | 2015-01-30 | 2015-01-30 | Method for measuring tower grounding resistance without disassembling grounding wire |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105021897A (en) * | 2015-08-17 | 2015-11-04 | 国网辽宁省电力有限公司抚顺供电公司 | Tower grounding resistance measurement apparatus without dismounting of grounding down lead, and measurement method thereof |
| CN106771639B (en) * | 2016-12-14 | 2019-11-15 | 国家电网有限公司 | High pressure pole tower ground resistance on-line monitoring system |
| CN107748293B (en) * | 2017-10-18 | 2020-11-17 | 国家电网公司 | Grounding wire, test system and method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1828313A (en) * | 2006-02-21 | 2006-09-06 | 武汉高压研究所 | Pole tower earthing resistance quick testing method without unfastening wire and device |
-
2015
- 2015-01-30 CN CN201510051500.2A patent/CN104678182B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1828313A (en) * | 2006-02-21 | 2006-09-06 | 武汉高压研究所 | Pole tower earthing resistance quick testing method without unfastening wire and device |
Non-Patent Citations (2)
| Title |
|---|
| 两种常用输电线路杆塔接地电阻测量方法的对比分析;周庆东;《电气计测》;20121231;第48-49页 * |
| 几种杆塔接地电阻测量仪器和方法的比较;刘泽生 等;《高电压技术》;20011031;第27卷(第5期);第76-80页 * |
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| Publication number | Publication date |
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| CN104678182A (en) | 2015-06-03 |
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