CN104678182A - 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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- CN104678182A CN104678182A CN201510051500.2A CN201510051500A CN104678182A CN 104678182 A CN104678182 A CN 104678182A CN 201510051500 A CN201510051500 A CN 201510051500A CN 104678182 A CN104678182 A CN 104678182A
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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 not dismantling ground wire, when especially having many ground wires for tested shaft tower, measuring process does not dismantle the measuring method of ground wire.
Background technology
At present two jaw ground resistance tester precision are on the market high, antijamming capability is strong, be simple to operately easy to carry about with one, digital processing capabilities is powerful, ground loop resistance can be detected when not power-off, avoiding in classic method needs at substantial engineering to lay auxiliary earth polar, needs to disconnect grounding body and the shortcoming such as electrical equipment is connected, both the requirement of the work of electric power system of needs not power-off has now been adapted to, in turn save a lot of manpower and materials, there is larger practical value.
But sometimes surveyed a shaft tower often more than ground wire, when running into many ground wires, require that the earthing device of tested shaft tower all ground wires except tested ground wire all disconnect with shaft tower when using two jaw ground resistance tester to measure, and it is in parallel with tested ground wire, the stake resistance of earthing device is measured as a whole, namely only retains a ground wire and is connected with shaft tower.At this moment the advantage (namely not needing to disconnect ground wire) of two jaw ground resistance tester is just difficult to embody, moreover sometimes the ground wire of shaft tower is also do not allow to disconnect or be difficult to disconnecting, and at this moment common two jaw ground resistance testers just cannot measure pole tower ground resistance.
Therefore be badly in need of a kind of when all ground wires do not disconnect at present, the measuring method of grounding resistance can be measured.
Summary of the invention
For the problems referred to above, the invention provides a kind of pole tower ground resistance measurement method not dismantling ground wire, no matter tower grounding line has how many can measure pole tower ground resistance, and every root ground wire does not need to disconnect, not high to user of service's level requirement, easy to operate.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention is achieved through the following technical solutions:
A kind of pole tower ground resistance measurement method not dismantling ground wire, it is characterized in that, multiple voltage clamp confession electricity is given by same power supply, the equivalent voltage source that each voltage jaw is acted on every root ground wire is completely equal, wherein, the quantity of voltage jaw is more than or equal to the quantity of all ground wires of shaft tower to be measured.
Preferably, specifically comprise the steps:
S01: the voltage jaw selecting identical quantity according to the radical of ground wire, is clipped on every root ground wire respectively, and wherein, all voltage jaws are connected with the voltage socket of earth resistance tester main frame;
S02: certain distance bottom distance voltage jaw, be clipped in by electric current jaw on any ground wire, described electric current jaw is connected with the current sockets of earth resistance tester main frame;
S03: open earth resistance tester main frame, reads the resistance value that main frame shows;
S04: with the radical of the resistance value that main frame shows divided by ground wire, namely obtain the grounding resistance finally will measured.
The invention has the beneficial effects as follows:
No matter tower grounding line has how many can measure pole tower ground resistance, and every root ground wire does not need to disconnect, and largely overcome prior art Problems existing, and structure is simple, easy to operate, not high to user of service's level requirement.
Accompanying drawing explanation
Fig. 1 is the pole tower ground resistance measuring principle equivalent circuit diagram that the present invention does not dismantle ground wire;
Fig. 2 is the requirement of 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 not dismantling the pole tower ground resistance measurement mechanism of ground wire of the present invention;
Fig. 4 be the present invention for measuring time schematic diagram;
Fig. 5 is the enlarged drawing of left part in Fig. 4;
The mark implication of accompanying drawing is as follows:
1: earth resistance tester main frame; 2: voltage jaw; 3: electric current jaw; 4: multiplex roles connector; 5: upper conductor; 6: lower wire; 7: stake resistance; 8: ground wire; 9: equivalent voltage source; 10: electric current jaw electric current to be measured.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, technical solution of the present invention is described in further detail, the quantity of wherein getting ground wire is 2 and is described, can better understand the present invention to make those skilled in the art and can be implemented, but illustrated embodiment is not as a limitation of the invention.
Do not dismantle a pole tower ground resistance measurement mechanism for ground wire, Fig. 1 is that hypothesis has pole tower ground resistance during two ground wires 8 to measure equivalent circuit diagram, and in the entire network, survey stake resistance 7, if its resistance is R, other each grounding resistor coupled in parallel values are R
0=R
1//R
2//R
3// ... //R
n, when n is larger, R
0< < R.When shaft tower quantity in parallel on lightning conducter in surveyed track section meets Fig. 2, just split-core type meter measurement of Grounding Resistance 7 can be used.
The present invention powers to multiple voltage jaw 2 by same power supply, the equivalent voltage source that each voltage jaw 2 is acted on every root ground wire 8 is completely equal, wherein, the quantity of voltage jaw 2 is more than or equal to the quantity of all ground wires 8 of shaft tower to be measured, and it is all equal no matter electric current jaw is clipped in the stake resistance numerical value that on which root ground wire, main frame is measured.
Be described as follows: pole tower ground resistance 7 measuring principle not dismantling ground wire 8 is powered to multiple voltage jaw 2 by same power supply, the equivalent voltage source 9 that each voltage jaw 2 is acted on every root ground wire 8 is completely equal, be expressed as U, two complete equal voltage sources are in parallel, and its total voltage is constant.The electric current jaw electric current to be measured 10 of the electric current in each equivalent voltage source 9 and Fig. 1 must be equal, be expressed as I, so electric current jaw 3 no matter to be clipped in stake resistance 7 numerical value that main frame on which root ground wire 8 measures all equal, all electric currents are added up the current value equaling to flow through in stake resistance 7.If there is n root ground wire 8, the electric current flowing through each equivalent voltage source 9 is n/mono-flowing through stake resistance 7 electric current, therefore the current value R that measures of main frame
*=U/I, actual stake resistance R=R
*/ n=U/ (nI).
As shown in Figure 3, a kind of pole tower ground resistance measurement mechanism not dismantling ground wire, comprises earth resistance tester main frame 1, it is at least provided with a current sockets and voltage socket, wherein, voltage socket is connected with multiplex roles connector 4, and current sockets is connected with electric current jaw 3.Multiplex roles connector 4 plays the effect of expanding interface, and its interface quantity can be arranged according to practical measurement requirement, or, can by the cascade of multiple multiplex roles connector 4 to meet the quantitative requirement of interface.
Multiplex roles connector 4 is connected with several voltage jaws 2, the quantity of described voltage jaw 2 is equal to or greater than the radical of the ground wire 8 of shaft tower to be measured, preferably, described voltage jaw 2 is removably arranged on multiplex roles connector 4, during measurement, the quantity of voltage jaw 2 equals the radical of ground wire 8.When earth resistance tester main frame 1 comprises multiple voltage socket, if the voltage source of voltage socket is identical, then voltage jaw 2 directly can be connected with voltage socket.
In order to avoid each ground wire 8 internal resistance on the impact of electric current in equivalent voltage source 9 as far as possible, preferably, measurement mechanism also comprises upper conductor 5 and lower wire 6, wherein, upper conductor 5 is for connecting the ground wire 8 of all voltage jaw 2 upper ends, lower wire 6 is for connecting all ground wires 8 in electric current jaw 3 lower end, and the below place that namely all ground wires 8 are positioned at electric current jaw 3 is connected by lower wire 6.
As shown in Figure 4 and Figure 5, a kind of pole tower ground resistance measurement method not dismantling ground wire, comprises the steps:
S01: the voltage jaw 2 selecting equal number according to the radical of ground wire 8, be clipped on every root ground wire 8 respectively, wherein, all voltage jaws 2 are connected with the voltage socket of earth resistance tester main frame 1;
S02: certain distance bottom distance voltage jaw 2, be clipped in by electric current jaw 3 on any ground wire 8, described electric current jaw 3 is connected with the current sockets of earth resistance tester main frame 1;
S03: open earth resistance tester main frame 1, reads the resistance value that main frame shows;
S04: with the radical of the resistance value that main frame shows divided by ground wire 8, the stake resistance 7 namely obtaining finally will measuring is worth.
Preferably, between step S02 and step S03, also comprise the steps: the ground wire 8 connecting all voltage jaw 2 upper ends with upper conductor 5, lower wire 6 connects all ground wires 8 in electric current jaw 3 lower end.
In step S01, all voltage jaws 2 are connected with the voltage socket of earth resistance tester main frame 1 by multiplex roles connector 4, accordingly, when ground wire 8 quantity reaches certain numerical value, by the cascade of multiple multiplex roles connector 4, each 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 tower grounding line 8 has how many can measure pole tower ground resistance 7, and every root ground wire 8 does not need to disconnect, largely overcome prior art Problems existing, and structure is simple, easy to operate, not high to user of service's level requirement.Existing earth resistance tester basis is reequiped, and repacking cost is low, has good market outlook.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in the technical field that other are relevant, be all in like manner included in scope of patent protection of the present invention.
Claims (4)
1. do not dismantle the pole tower ground resistance measurement method of ground wire for one kind, it is characterized in that, the power supply of multiple voltage jaw (2) is given by same power supply, the equivalent voltage source that each voltage jaw (2) is acted on every root ground wire (8) is completely equal, wherein, the quantity of voltage jaw (2) is more than or equal to the quantity of all ground wires (8) of shaft tower to be measured.
2. a kind of pole tower ground resistance measurement method not dismantling ground wire according to claim 1, is characterized in that, specifically comprise the steps:
S01: the voltage jaw (2) selecting identical quantity according to the radical of ground wire (8), is clipped on every root ground wire (8) respectively, and wherein, all voltage jaws (2) are connected with the voltage socket of earth resistance tester main frame (1);
S02: distance voltage jaw (2) bottom certain distance, be clipped in by electric current jaw (3) on any ground wire (8), described electric current jaw (3) is connected with the current sockets of earth resistance tester main frame (1);
S03: open earth resistance tester main frame (1), reads the resistance value that main frame shows;
S04: with the radical of the resistance value that main frame shows divided by ground wire (8), namely obtains stake resistance (7) value finally will measured.
3. a kind of pole tower ground resistance measurement method not dismantling ground wire according to claim 2, it is characterized in that, between step S02 and step S03, also comprise the steps: the ground wire (8) connecting all voltage jaw (2) upper ends with upper conductor (5), lower wire (6) connects all ground wires (8) in electric current jaw (3) lower end.
4. a kind of pole tower ground resistance measurement method not dismantling ground wire according to claim 2, is characterized in that, in step S01, all voltage jaws (2) are connected by the voltage socket of multiplex roles connector with earth resistance tester main frame (1).
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 |
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| Publication Number | Publication Date |
|---|---|
| CN104678182A true CN104678182A (en) | 2015-06-03 |
| CN104678182B 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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Cited By (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 |
| CN106771639A (en) * | 2016-12-14 | 2017-05-31 | 国家电网公司 | High pressure pole tower ground resistance on-line monitoring system |
| CN107748293A (en) * | 2017-10-18 | 2018-03-02 | 国家电网公司 | Ground 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 |
|---|
| 刘泽生 等: "几种杆塔接地电阻测量仪器和方法的比较", 《高电压技术》 * |
| 周庆东: "两种常用输电线路杆塔接地电阻测量方法的对比分析", 《电气计测》 * |
Cited By (4)
| 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 |
| CN106771639A (en) * | 2016-12-14 | 2017-05-31 | 国家电网公司 | High pressure pole tower ground resistance on-line monitoring system |
| 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 |
| CN107748293A (en) * | 2017-10-18 | 2018-03-02 | 国家电网公司 | Ground wire, test system and method |
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| Publication number | Publication date |
|---|---|
| CN104678182B (en) | 2017-05-03 |
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