CN104332727B - A kind of utilization displacement current improves the centralized earthing device and method for arranging of characteristics of the dispersed flow - Google Patents
A kind of utilization displacement current improves the centralized earthing device and method for arranging of characteristics of the dispersed flow Download PDFInfo
- Publication number
- CN104332727B CN104332727B CN201410640835.3A CN201410640835A CN104332727B CN 104332727 B CN104332727 B CN 104332727B CN 201410640835 A CN201410640835 A CN 201410640835A CN 104332727 B CN104332727 B CN 104332727B
- Authority
- CN
- China
- Prior art keywords
- earthing
- grounding means
- grounding
- centralized
- displacement current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000002689 soil Substances 0.000 claims description 10
- 230000001603 reducing effect Effects 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 8
- 238000004088 simulation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 241000283080 Proboscidea <mammal> Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin
Landscapes
- Manufacturing Of Electrical Connectors (AREA)
Abstract
The invention discloses the centralized earthing device and method for arranging that a kind of utilization displacement current improves characteristics of the dispersed flow, including the first earthing or grounding means, the first described earthing or grounding means is embedded in underground, it is characterized in that, also include the second earthing or grounding means, the second described earthing or grounding means is embedded in the lower section of the first earthing or grounding means, parallel to each other and do not contact with the first earthing or grounding means.The grounding design of centralized earthing device is the composite can be widely applied to, resulting earthing or grounding means has resistance reducing effect substantially, and construction and installation are easy, can greatly improve the security of Operation of Electric Systems.
Description
Technical field
It is more particularly to a kind of to improve diffusing spy using displacement current the present invention relates to power system Lightning protection field
The centralized earthing device and method for arranging of property.
Background technology
Operation of Electric Systems experience have shown that, thunderbolt is the main original for causing most of transformer stations and transmission line of electricity trip accident
Because, and the impulse earthed resistance of its centralized earthing device directly influences transformer station, the lightning protection properties of circuit.In high electric resistance of soil
Rate area, because the impulse earthed resistance of earthing or grounding means is often very big, threatens to system safety operation, therefore the high soil of reduction
The Transient grounding resistance of earth resistivity area concentration earthing or grounding means is significant for the security for improving power system.
The impact drop resistance measure generally used in engineering, which mainly has, to be increased the size of grounding body, utilizes natural grounding substance etc..But these
Method respectively has its relative application conditions, meets desired the design of grounding still very difficult.Blindly increase grounding body
Size, can not reach impact resistance reducing effect well, be likely to result in the waste of material.
Research shows that diffusing of the dash current in soil is mainly by conducting under electric current and displacement current collective effect
Complete.Due to soil and non-conductor, it has medium character simultaneously, therefore, and displacement current account for very big by one in diffusing electric current
Part.Especially for high resistivity area, displacement current has very important commonly greater than conduction electric current during diffusing
Effect.
The content of the invention
In order to solve the technical problem that earthing or grounding means is unable to reach preferably impact resistance reducing effect, the present invention provides one kind just
Improve centralized earthing device and the arrangement side of characteristics of the dispersed flow in the utilization displacement current realized and there is splendid impact resistance reducing effect
Method.
In order to realize above-mentioned technical purpose, the technical scheme is that, one kind improves characteristics of the dispersed flow using displacement current
Centralized earthing device, including the first earthing or grounding means, the first described earthing or grounding means is embedded in underground, also including the second ground connection dress
Put, the second described earthing or grounding means is embedded in the lower section of the first earthing or grounding means, it is parallel to each other and do not contact with the first earthing or grounding means.
A kind of described utilization displacement current improves the centralized earthing device of characteristics of the dispersed flow, and the second described earthing or grounding means is adopted
With with the first earthing or grounding means identical earthing or grounding means.
A kind of described utilization displacement current improves the centralized earthing device of characteristics of the dispersed flow, what centralized earthing device was formed
Electric capacity C is：
C=ε S/d
Wherein, ε is soil dielectric constant, and S is the facing area of the first earthing or grounding means and the second earthing or grounding means, and d is first
The distance between earthing or grounding means and the second earthing or grounding means.
A kind of utilization displacement current improves the method for arranging of the centralized earthing device of characteristics of the dispersed flow, and the first ground connection is buried first
Device, then in embedded second earthing or grounding means of the first earthing or grounding means parallel beneath, and two earthing or grounding means are not in contact with each other.
A kind of described utilization displacement current improves the method for arranging of the centralized earthing device of characteristics of the dispersed flow, described second
Earthing or grounding means is used and the first earthing or grounding means identical earthing or grounding means.
A kind of described utilization displacement current improves the method for arranging of the centralized earthing device of characteristics of the dispersed flow, concentrates ground connection dress
Putting formed electric capacity C is：
C=ε S/d
Wherein, ε is soil dielectric constant, and S is the facing area of the first earthing or grounding means and the second earthing or grounding means, and d is first
The distance between earthing or grounding means and the second earthing or grounding means.
Double-deck centralized earthing device is substantially to improve the capacity effect of grounding body over the ground, i.e. basis
C=ε S/d
Understand to choose the distance between suitable two layers of centralized earthing device to increase electric capacity.Due to lightning current equivalent frequency
Height, and high frequency electric easily circulates in capacitive reactances.Therefore using the high frequency electric feature, electric current is made to run through electric capacity progress
Release to reach the purpose of raising characteristics of the dispersed flow.
The grounding design of centralized earthing device is the composite can be widely applied to, resulting earthing or grounding means has resistance reducing effect
Substantially, construction and installation are easy, can greatly improve the security of Operation of Electric Systems.
Brief description of the drawings
Fig. 1 is the schematic diagram of the double-deck centralized earthing device of the present invention；
Fig. 2 is the equivalent circuit diagram of the double-deck centralized earthing device of the present invention；
Fig. 3 is that centralized earthing device of the present invention is simulated test platform schematic diagram；
Wherein 1 it is the first earthing or grounding means, 2 is the second earthing or grounding means.
Embodiment
The present invention, which proposes a kind of utilization displacement current, improves the earthing or grounding means method for arranging of characteristics of the dispersed flow.It is of the invention main
It is by installing double-deck centralized earthing device, accelerating the velocity of liquid assets of displacement current, increase diffusing area, so as to reach raising punching
Stream efficiency is smashed, the purpose of Transient grounding resistance is reduced, and provides the impact characteristics simulation examination for the centralized earthing device
Platform schematic diagram is tested, to study the impact resistance reducing effect of individual layer and double-deck earthing or grounding means.Just the operating method of the present invention is made below
Further instruction：
Referring to Fig. 1, in the present embodiment, the first earthing or grounding means length of side value in upper strata is 5x5m, and earthing material is zinc-plated
Band steel, laying depth 0.8m；The second earthing or grounding means length of side value in lower floor is 13x13m, and laying depth is 3m.Ground connection dress
The structure put uses common grounding device constructions, i.e., leave the sphere of movements for the elephants type in space for centre by the conductor material split of strip
Structure, the present apparatus can also be implemented using other grounding device constructions.The area of the first earthing or grounding means is smaller in figure, and second connects
The area of ground device is larger, and under this is due to general condition, upper layer of soil resistivity is higher, and lower soil resistivity is relatively low,
The larger earthing or grounding means of lower floor's erection space can improve diffusing efficiency as primary ground pole, while laying area on upper strata
Less auxiliary earthing apparatus, characteristics of the dispersed flow is improved using displacement current, so as to improve the diffusing effect of overall centralized earthing device
Really.And in order to maximize levels facing area, two earthing or grounding means be arranged in parallel.
Referring to Fig. 2, nonlinear resistance R1With R2Represent diffusing during because of caused by cremate effect resistance variations, C1For
Electric capacity between levels earthing or grounding means, C2For earthing or grounding means direct-to-ground capacitance, and C1Much larger than C2.Under dash current effect, due to
Equivalent capacity C1Very big, its capacitive reactance very little, the circulation of favourable displacement current improves the ability that energy is released.
As shown in figure 3, being for verifying that the simulation of a set of centralized earthing device impact characteristics of apparatus of the present invention effect is tried
Experiment device.The simulation test device used in the present invention, which mainly includes impact high-voltage large current generator, simulation the earth, to be tested
Groove, current divider, impulse voltage divider, digital oscilloscope, earthing or grounding means etc..A set of thunder and lightning that can simulate is have developed for this present invention to rush
The packaged type impact high-voltage large current generator pilot system of ripple is hit, the system is by control cabinet, controller and transmission linear system
System constitute, can Based Intelligent Control produce voltage x current and generator body ball stand-off distance from, contact action interface is easily understood,
It is easy to the progress of simulated test.The material of centralized earthing device in the experiment is identical with actual earthing or grounding means, according to impact
The principle of the theory of similarity is tested, size and buried depth press actual conditions scaled down.In experiment using digital oscilloscope record not
With dash current under earthing or grounding means and the waveform of surge voltage, the peak value of surge voltage and dash current, and calculating simulation are read
The impulse earthed resistance of earthing or grounding means.Show by simulated experiment, double-deck earthing or grounding means can be effectively improved impact diffusing effect.
Claims (2)
1. a kind of utilization displacement current improves the centralized earthing device of characteristics of the dispersed flow, including the first earthing or grounding means, described first
Earthing or grounding means is embedded in underground, it is characterised in that also including the second earthing or grounding means, and the second described earthing or grounding means is embedded in first
The lower section of earthing or grounding means, it is parallel to each other and do not contact with the first earthing or grounding means, wherein the area of the first earthing or grounding means is smaller, second
The area of earthing or grounding means is larger, and the second described earthing or grounding means is used to be connect with the first earthing or grounding means identical earthing or grounding means, concentration
The electric capacity C that ground device is formed is：
C=ε S/d
Wherein, ε is soil dielectric constant, and S is the facing area between the first earthing or grounding means and the second earthing or grounding means, and d connects for first
The distance between ground device and the second earthing or grounding means.
2. a kind of utilization displacement current improves the method for arranging of the centralized earthing device of characteristics of the dispersed flow, it is characterised in that bury first
If the first earthing or grounding means, then in embedded second earthing or grounding means of the first earthing or grounding means parallel beneath, and two earthing or grounding means are mutual not
Contact, wherein the area of the first earthing or grounding means is smaller, the area of the second earthing or grounding means is larger, and the second described earthing or grounding means is used
With the first earthing or grounding means identical earthing or grounding means, the electric capacity C that centralized earthing device is formed is：
C=ε S/d
Wherein, ε is soil dielectric constant, and S is the facing area of the first earthing or grounding means and the second earthing or grounding means, and d is the first ground connection
The distance between device and the second earthing or grounding means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410640835.3A CN104332727B (en) | 2014-11-13 | 2014-11-13 | A kind of utilization displacement current improves the centralized earthing device and method for arranging of characteristics of the dispersed flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410640835.3A CN104332727B (en) | 2014-11-13 | 2014-11-13 | A kind of utilization displacement current improves the centralized earthing device and method for arranging of characteristics of the dispersed flow |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104332727A CN104332727A (en) | 2015-02-04 |
| CN104332727B true CN104332727B (en) | 2017-07-11 |
Family
ID=52407410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410640835.3A Active CN104332727B (en) | 2014-11-13 | 2014-11-13 | A kind of utilization displacement current improves the centralized earthing device and method for arranging of characteristics of the dispersed flow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104332727B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106785508B (en) * | 2016-12-13 | 2020-02-21 | 深圳供电局有限公司 | Overhead transmission line shaft tower combination formula ground net |
| CN107102219B (en) * | 2017-03-08 | 2019-09-10 | 国网山西省电力公司大同供电公司 | A kind of impact diffusing pilot system for the compound earthing material of graphite |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201540969U (en) * | 2009-09-03 | 2010-08-04 | 庄严 | Grounding module with capacitor characteristics |
| CN202308338U (en) * | 2011-11-15 | 2012-07-04 | 傅玉洁 | Double-layer structure grounding grid with characteristics of effectively improving electric potential distribution and reducing step voltage |
| JP5876845B2 (en) * | 2013-03-13 | 2016-03-02 | 公益財団法人鉄道総合技術研究所 | Grounding device |
| CN204257834U (en) * | 2014-11-13 | 2015-04-08 | 国家电网公司 | A kind of centralized earthing device utilizing displacement current to improve characteristics of the dispersed flow |
-
2014
- 2014-11-13 CN CN201410640835.3A patent/CN104332727B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104332727A (en) | 2015-02-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Haddad et al. | Experimental investigation of the impulse characteristics of practical ground electrode systems | |
| Banjanin et al. | Lightning protection of overhead transmission lines using external ground wires | |
| CN104332727B (en) | A kind of utilization displacement current improves the centralized earthing device and method for arranging of characteristics of the dispersed flow | |
| Grange et al. | Safety of wind farm grounding systems under fault and lightning currents | |
| Tatematsu et al. | Lightning current simulation of 66-kV substation with power cables using the three-dimensional FDTD method | |
| El Mghairbi et al. | Technique to increase the effective length of practical earth electrodes: Simulation and field test results | |
| Prasad et al. | Soil resistivity and earthing system | |
| CN204257834U (en) | A kind of centralized earthing device utilizing displacement current to improve characteristics of the dispersed flow | |
| Gouda et al. | Parameters affecting the back flashover across the overhead transmission line insulator caused by lightning | |
| Li et al. | Lightning transient characteristics of cable power collection system in wind power plants | |
| CN103647270A (en) | +/-800 kV extra high voltage DC line grounding arrangement method and system | |
| CN202384676U (en) | Grounding net of urban indoor 220kV transformer substation | |
| Elmghairbi et al. | A technique to increase the effective length of horizontal earth electrodes and its application to a practical earth electrode system | |
| CN105426558A (en) | Method for determining electrical connection mode between substation grounding grid and base station grounding grid | |
| Adelian | Improvement of substation earthing | |
| Nikolovski et al. | Frequency and time response of power plant grounding system exposed to lightning strike | |
| Araneo et al. | Transient response of grounding systems of wind turbines under lightning strikes | |
| Lehtonen et al. | Ground potential rise and lightning overvoltages in control systems of large power-plants under high soil resistivity | |
| CN103166141A (en) | Grounding grid of urban full-indoor transformer substation of 220kV | |
| Siahpoosh et al. | Wind farm grounding system analysis | |
| Elmghairbi et al. | Potential rise and safety voltages of wind turbine earthing systems under transient conditions | |
| Rao et al. | Effect of water and salinity on soil behaviour under lightning | |
| Eshaghahmadi et al. | Surge arrester placement in wind turbine system by evaluation overvoltages of direct lightning strike to the wind turbine blades and overhead distribution lines | |
| Xue et al. | Lightning impulse impedance and surface potential distribution of 10 kV distribution line tower: Field test and simulation | |
| Siregar et al. | Lightning Arrester Design as a Security System for Photovoltaic Systems in Pematang Johar Village |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |