CN103036076B - A kind of reduction Transient grounding resistance value device and method - Google Patents
A kind of reduction Transient grounding resistance value device and method Download PDFInfo
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- CN103036076B CN103036076B CN201210574791.XA CN201210574791A CN103036076B CN 103036076 B CN103036076 B CN 103036076B CN 201210574791 A CN201210574791 A CN 201210574791A CN 103036076 B CN103036076 B CN 103036076B
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- 230000001052 transient effect Effects 0.000 title claims abstract description 42
- 230000009467 reduction Effects 0.000 title claims abstract description 27
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- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 4
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Abstract
The invention discloses a kind of reduction Transient grounding resistance value device, comprise the drainage conductor being arranged at shaft tower horizontal grounding and extremely going up, the outer peripheral face of described drainage conductor is provided with some shunt conductor, and each described shunt conductor is uniform successively along the bearing of trend of the axis of described drainage conductor.In the course of work, by welding multiple shunt conductor on drainage conductor, inhibit " end effect " of earth electrode, making diffusing more even, fully employ the middle part diffusing ability of conductor, more abundant to the utilization of earthing conductor, whole assembly structure is simple and reliable, and the course of work is simple and easy to do, can significantly reduce Transient grounding resistance value, significantly improve the lightning withstand level of power transmission and transformation line, reduce the trip phenomenon caused because of thunderbolt, ensure that power system safety and stability ground runs.The invention also discloses a kind of reduction Transient grounding resistance value method applying above-mentioned reduction Transient grounding resistance value device.
Description
Technical field
The present invention relates to power transmission and transforming equipment auxiliary appliance technical field, particularly one reduces Transient grounding resistance value device.The invention still further relates to a kind of reduction Transient grounding resistance value method of this device of application.
Background technology
In current power system operation maintenance process, most of power transmission and transformation line accident is all that the trip phenomenon caused due to transmission line of lightning strike or shaft tower causes.Improve the lightning withstand level of power transmission and transformation line, reducing the safe operation of tripping rate with lightning strike to electric power system has very important meaning.In the design of overhead line structures, the Transient grounding resistance value of its earthing device, directly has influence on the lightning protection effect of circuit.Therefore, optimize the structural design of earth electrode, reduce impedance ground value, have great importance.
In the equipment of current existing lightning protection earth polar, it normally adopts the composite construction be made up of multilayer materials such as carbon fiber tension muscle and the outer carbon fiber and graphites of muscle, although this kind of structure can meet basic anti-lightning strike needs, but because itself mechanism is complicated, manufacture process and later maintenance are comparatively loaded down with trivial details, cause inconvenience to normal power system device operation and later maintenance.
Therefore, how more easily the Transient grounding resistance value reduced in power equipment running is the important technological problems that those skilled in the art need to solve at present.
Summary of the invention
The object of this invention is to provide a kind of reduction Transient grounding resistance value device, this device can reduce the Transient grounding resistance value in power equipment running more easily.Another object of the present invention is to provide a kind of reduction Transient grounding resistance value method applying above-mentioned reduction Transient grounding resistance value device.
For solving the problems of the technologies described above, the invention provides a kind of reduction Transient grounding resistance value device, comprise the drainage conductor being arranged at shaft tower horizontal grounding and extremely going up, the outer peripheral face of described drainage conductor is provided with some shunt conductor, and each described shunt conductor is uniform successively along the bearing of trend of the axis of described drainage conductor.
Preferably, described drainage conductor and described shunt conductor are all specially galvanized steel conductor.
Preferably, described drainage conductor and described shunt conductor are all specially round steel conductor, and the length of described drainage conductor be 1m ~ 2m, diameter is 16mm, the length of described shunt conductor is 0.1m ~ 0.2mm, diameter is 16mm.
Preferably, described drainage conductor and described shunt conductor are all specially band steel conductor, and the length of described drainage conductor be 1m ~ 2m, width is 50mm, thickness is 10mm, the length of described shunt conductor is 0.1m ~ 0.2mm, width is 50mm, thickness is 10mm.
The present invention also provides a kind of and reduces Transient grounding resistance value method, comprises step:
Drainage conductor is located, by drainage conductor arrangement in end 20% ~ 70% place apart from shaft tower horizontal grounding pole;
Determine shunt conductor length, according to actual condition, the length of shunt conductor is taken as 10% of drainage conductor length;
Shunt conductor is located, and shunt conductor is arranged in impulse current decanting point 20% ~ 80% place apart from drainage conductor;
Determine shunt conductor spacing, according to actual condition, shunt conductor spacing is taken as 10% of drainage conductor length.
Relative above-mentioned background technology, reduction Transient grounding resistance value device provided by the present invention, comprise the drainage conductor being arranged at shaft tower horizontal grounding and extremely going up, the outer peripheral face of described drainage conductor is provided with some shunt conductor, and each described shunt conductor is uniform successively along the bearing of trend of the axis of described drainage conductor.In the course of work, by welding multiple shunt conductor on drainage conductor, inhibit " end effect " of earth electrode, making diffusing more even, fully employ the middle part diffusing ability of conductor, more abundant to the utilization of earthing conductor, whole assembly structure is simple and reliable, and the course of work is simple and easy to do, can significantly reduce Transient grounding resistance value, significantly improve the lightning withstand level of power transmission and transformation line, reduce the trip phenomenon caused because of thunderbolt, ensure that power system safety and stability ground runs.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The assembly structure schematic diagram of the reduction Transient grounding resistance value device that Fig. 1 provides for a kind of embodiment of the present invention;
Fig. 2 is the assembly structure schematic diagram of drainage conductor part in Fig. 1;
The flow chart of the reduction Transient grounding resistance value method that Fig. 3 provides for a kind of embodiment of the present invention.
Embodiment
Core of the present invention is to provide a kind of reduction Transient grounding resistance value device, and this device can reduce the Transient grounding resistance value in power equipment running more easily; Meanwhile, a kind of reduction Transient grounding resistance value method applying above-mentioned reduction Transient grounding resistance value device is provided.
In order to make those skilled in the art person understand the present invention program better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 1 and Fig. 2, the assembly structure schematic diagram of the reduction Transient grounding resistance value device that Fig. 1 provides for a kind of embodiment of the present invention; Fig. 2 is the assembly structure schematic diagram of drainage conductor part in Fig. 1.
In a specific embodiment, reduction Transient grounding resistance value device provided by the present invention, comprise the drainage conductor 12 be arranged on shaft tower horizontal grounding pole 11, the outer peripheral face of drainage conductor 12 is provided with some shunt conductor 13, and each shunt conductor 13 is uniform successively along the bearing of trend of the axis of drainage conductor 12.In the course of work, by arranging multiple shunt conductor 13 on drainage conductor 12, inhibit " end effect " of earth electrode, making diffusing more even, fully employ the middle part diffusing ability of conductor, more abundant to the utilization of earthing conductor, whole assembly structure is simple and reliable, and the course of work is simple and easy to do, can significantly reduce Transient grounding resistance value, significantly improve the lightning withstand level of power transmission and transformation line, reduce the trip phenomenon caused because of thunderbolt, ensure that power system safety and stability ground runs.
Further, drainage conductor 11 and shunt conductor 12 are all specially galvanized steel conductor.By arranging galvanized steel metallic conductor, significantly reduce impulse earthed resistance value, and its stock utilization is high, has saved a large amount of conductor materials.
More specifically, drainage conductor 11 and shunt conductor 12 are all specially round steel conductor, and the length of drainage conductor 11 be 1m ~ 2m, diameter is 16mm, the length of shunt conductor 12 is 0.1m ~ 0.2mm, diameter is 16mm.
On the other hand, drainage conductor 11 and shunt conductor 12 are all specially band steel conductor, and the length of drainage conductor 11 be 1m ~ 2m, width is 50mm, thickness is 10mm, the length of shunt conductor 12 is 0.1m ~ 0.2mm, width is 50mm, thickness is 10mm.
Certainly, shape and the size thereof of drainage conductor 11 and shunt conductor 12 are not limited to described in foregoing embodiments, as long as can meet the actual use needs of described reduction Transient grounding resistance value device.
Please refer to Fig. 3, the flow chart of the reduction Transient grounding resistance value method that Fig. 3 provides for a kind of embodiment of the present invention.
In a specific embodiment, coil dimension method of measurement provided by the present invention, comprising:
Step 101: drainage conductor is located;
By drainage conductor arrangement in end 20% ~ 70% place apart from shaft tower horizontal grounding pole.Earth electrode is different under power current effect under impulse current effect, and earth electrode will present inductive effect, hinders electric current to flow to earth electrode far-end.If earth electrode is long, then under impulse current effect, only some is utilized.Consider that electric power line pole tower often adopts horizontal grounding to extend extremely continuously and reduces earth resistance, described drainage conductor should avoid horizontal grounding pole tail region; Consider the screen effect of electric current, described drainage conductor also should avoid the head end region of horizontal grounding pole.In the present invention, by 20% ~ 70% place of drainage conductor arrangement in shaft tower horizontal grounding pole.
Step 102: determine shunt conductor length;
According to actual condition, the length of shunt conductor is taken as 10% of drainage conductor length.As shunt conductor length is too short, the spark location that described shunt conductor produces is positioned within the spark location of described drainage conductor itself, at this moment, described shunt conductor is remarkable by the impact of described drainage conductor screen effect, and the shunt conductor of this length does not reach the object improving earth electrode impulse grounding characteristic.Though the measure increasing described shunt conductor length can reduce impulse earthed resistance to a certain extent, the principal element affecting impulse earthed resistance value is earth electrode end conductor effect but not conductor length.Therefore, the length of shunt conductor is one of Important Parameters needing to determine, the spark location that rational shunt conductor length should ensure shunt conductor end under impulse current by the spark location of drainage conductor own shielding and affect.For effectively improving the impact characteristics of earth electrode and improving the utilization ratio of conductor, take into full account economical, in the present invention, the length of described shunt conductor is taken as 10% of described drainage conductor.
Step 103: shunt conductor is located;
Shunt conductor is arranged in impulse current decanting point 20% ~ 80% place apart from drainage conductor.When described shunt conductor is positioned at first and last two ends of described drainage conductor, all there is shielding action in the diffusing of described shunt conductor end and described drainage end conductor.In addition, the impact characteristics influenced each other when also can be positioned at end to described shunt conductor of the repulsive interaction of impulse current and Analysis of End Electric Field has an impact.Therefore, when earthing conductor is arranged shunt conductor, described shunt conductor should be arranged in drainage conductor zone line and be advisable.In the present invention, described shunt conductor to be arranged in described drainage conductor impulse current decanting point as starting point, is arranged in 20% ~ 80% place of drainage conductor.
Step 104: determine shunt conductor spacing;
According to actual condition, shunt conductor spacing is taken as 10% of drainage conductor length.The layout density of the described shunt conductor of suitable increase, reduce arrangement pitch and can improve diffusing ability in the middle part of earthing conductor, improve the utilance of earthing conductor, but described shunt conductor spacing too closely can cause diffusing value to reduce because of " screen effect " between described shunt conductor, be unfavorable for reducing Transient grounding resistance.For effectively improving the Transient grounding resistance characteristic of earthing device and taking into full account economical, in the present invention, described shunt conductor spacing is taken as 10% of described drainage conductor length.
In summary, the reduction Transient grounding resistance value device provided in the present invention, comprise the drainage conductor being arranged at shaft tower horizontal grounding and extremely going up, the outer peripheral face of described drainage conductor is provided with some shunt conductor, and each described shunt conductor is uniform successively along the bearing of trend of the axis of described drainage conductor.In the course of work, by welding multiple shunt conductor on drainage conductor, inhibit " end effect " of earth electrode, making diffusing more even, fully employ the middle part diffusing ability of conductor, more abundant to the utilization of earthing conductor, whole assembly structure is simple and reliable, and the course of work is simple and easy to do, can significantly reduce Transient grounding resistance value, significantly improve the lightning withstand level of power transmission and transformation line, reduce the trip phenomenon caused because of thunderbolt, ensure that power system safety and stability ground runs.
In addition, the reduction Transient grounding resistance value method of application provided by the invention above-mentioned reduction Transient grounding resistance value device, its operating process is simple and easy to do, can effectively reduce Transient grounding resistance value.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
Above reduction Transient grounding resistance value device provided by the present invention and the reduction Transient grounding resistance value method of applying this reduction Transient grounding resistance value device are described in detail.Apply specific case herein to set forth principle of the present invention and execution mode, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection range of the claims in the present invention.
Claims (3)
1. one kind is reduced Transient grounding resistance value device, it is characterized in that: comprise the drainage conductor being arranged at shaft tower horizontal grounding and extremely going up, the outer peripheral face of described drainage conductor is provided with some shunt conductor, and each described shunt conductor is uniform successively along the bearing of trend of the axis of described drainage conductor, described shunt conductor is arranged in impulse current decanting point 20% ~ 80% place apart from described drainage conductor;
Described drainage conductor and described shunt conductor are all specially round steel conductor, and the length of described drainage conductor be 1m ~ 2m, diameter is 16mm, the length of described shunt conductor is 0.1m ~ 0.2mm, diameter is 16mm;
Or described drainage conductor and described shunt conductor are all specially band steel conductor, and the length of described drainage conductor be 1m ~ 2m, width is 50mm, thickness is 10mm, the length of described shunt conductor is 0.1m ~ 0.2mm, width is 50mm, thickness is 10mm.
2. reduction Transient grounding resistance value device as claimed in claim 1, is characterized in that: described drainage conductor and described shunt conductor are all specially galvanized steel conductor.
3. reduce a Transient grounding resistance value method, it is characterized in that, comprise step:
Drainage conductor is located, by drainage conductor arrangement in end 20% ~ 70% place apart from shaft tower horizontal grounding pole;
Determine shunt conductor length, according to actual condition, the length of shunt conductor is taken as 10% of drainage conductor length;
Shunt conductor is located, and shunt conductor is arranged in impulse current decanting point 20% ~ 80% place apart from drainage conductor, and makes shunt conductor uniform successively along the Axis Extension direction of drainage conductor;
Determine shunt conductor spacing, according to actual condition, shunt conductor spacing is taken as 10% of drainage conductor length.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210574791.XA CN103036076B (en) | 2012-12-25 | 2012-12-25 | A kind of reduction Transient grounding resistance value device and method |
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| CN201210574791.XA CN103036076B (en) | 2012-12-25 | 2012-12-25 | A kind of reduction Transient grounding resistance value device and method |
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| CN103036076B true CN103036076B (en) | 2016-02-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103474791A (en) * | 2013-09-29 | 2013-12-25 | 国家电网公司 | Radial grounding device with impact impedance reducing function |
| CN106451030A (en) * | 2016-12-01 | 2017-02-22 | 国网山西省电力公司大同供电公司 | Device and method for reducing grounding resistance of grounding grid |
| CN111541121A (en) * | 2020-05-14 | 2020-08-14 | 国网湖北省电力有限公司十堰供电公司 | Method for reducing impact grounding impedance of power transmission line tower |
| CN111740243A (en) * | 2020-07-13 | 2020-10-02 | 河南四达电力设备股份有限公司 | Grounding device with spark plug |
| CN117592159A (en) * | 2023-11-27 | 2024-02-23 | 国网宁夏电力有限公司电力科学研究院 | Analytical design method for conductor grounding device for reducing resistance and equalizing voltage |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201243091Y (en) * | 2008-06-27 | 2009-05-20 | 江苏省电力公司连云港供电公司 | Composite grounding body for electrical equipment |
| CN202352841U (en) * | 2011-12-14 | 2012-07-25 | 重庆市潼南县供电有限责任公司 | Multipole grounding device for power transmission line tower |
| CN102983420A (en) * | 2012-12-12 | 2013-03-20 | 重庆大学 | Grounding device for reducing shock ground impedance of electric transmission line tower |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101268586B (en) * | 2005-09-19 | 2010-04-14 | Abb技术有限公司 | Grounding electrode |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201243091Y (en) * | 2008-06-27 | 2009-05-20 | 江苏省电力公司连云港供电公司 | Composite grounding body for electrical equipment |
| CN202352841U (en) * | 2011-12-14 | 2012-07-25 | 重庆市潼南县供电有限责任公司 | Multipole grounding device for power transmission line tower |
| CN102983420A (en) * | 2012-12-12 | 2013-03-20 | 重庆大学 | Grounding device for reducing shock ground impedance of electric transmission line tower |
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