CN101937022B - Method for measuring ground resistance of double ground network - Google Patents
Method for measuring ground resistance of double ground network Download PDFInfo
- Publication number
- CN101937022B CN101937022B CN2010102387082A CN201010238708A CN101937022B CN 101937022 B CN101937022 B CN 101937022B CN 2010102387082 A CN2010102387082 A CN 2010102387082A CN 201010238708 A CN201010238708 A CN 201010238708A CN 101937022 B CN101937022 B CN 101937022B
- Authority
- CN
- China
- Prior art keywords
- ground
- resistance
- network
- measuring
- double
- 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.)
- Expired - Fee Related
Links
Images
Abstract
The invention relates to a method for measuring the ground resistance of a double ground network when an external ground network is introduced to reduce the ground resistance. The method comprises the following steps: 1, determining the mutual resistance r0 of the double ground network; 2, measuring the ground resistance r1 of a primary network and the ground resistance r2 of a secondary network; and 3, determining the ground resistance R of the double ground network. The method is simple and convenient in computation and obvious in physical significance and solves the problem that it is troublesome to measure the wiring of the double ground network in engineering application.
Description
Technical field:
The present invention relates to the measuring method of a kind of measuring method of stake resistance, particularly a kind of pair of ground network ground resistance, be applicable to the measurement of two earth mat ground connection stake resistances when drawing earth mat outside adopting in the power engineering construction field reduces stake resistance.
Background technology:
The western hydroelectric resources of China is abundant, has built a lot of large-scale water power power house in recent years, these power stations through UHV (ultra-high voltage) or extra-high voltage AC and DC transmission line of electricity to the east urban electricity supply.Yet power house and supporting transformer station or current conversion station and transmission line of electricity mainly are positioned at the mountain area, and residing geologic structure complicacy is various, and the soil resistivity of some areas has brought very large difficulty for the design of earthed system up to thousands of Europe rice.At present, the method that reduces ground network ground resistance is many, and for making full use of the geographical conditions in mountain area, near the low-resistance region (river, pond) the transformer station capable of using is laid auxiliary earth mat, reaches the purpose that reduces stake resistance through the auxiliary outer earth mat that draws.Drawing auxiliary earth mat outward is a kind of important resistance measure of falling, and when two earth mat a good distance offs, adopts conventional measurement to measure relatively difficulty of its stake resistance.
Summary of the invention:
Adopt the outer realistic problem of being separated by and far being difficult to measure because of major network and auxilliary net when drawing earth mat and reducing stake resistance to high soil resistivity; The measuring method that the purpose of this invention is to provide a kind of pair of earth mat earthed system stake resistance, this method can reduce the length of arrangement wire when measuring two ground network ground resistance or solve the problem of difficult wiring.
The present invention mainly is through measuring the major network stake resistance, and the mutual resistance between auxilliary net stake resistance and major network and the auxilliary net is measured the stake resistance of pair earth mats with round-about way, and specifically, the present invention realizes that the technical scheme that its purpose adopts may further comprise the steps:
The first step, the mutual resistance r of the two earth mats of measurement
0Measuring method adds power supply and reometer on the connecting line between two earth mats shown in accompanying drawing 2, through measuring electric current I and voltage U, can try to achieve the mutual resistance r of two earth mats
0:
In second step, measure major network and the auxilliary stake resistance r that nets
1, r
2, can measure according to GB/T 17949.1-2000 " soil resistivity of earthed system, impedance ground and ground potential are measured guide rule ".
The 3rd step:, press formula and confirm two ground network ground resistance R according to mutual resistance, major network stake resistance and auxilliary net stake resistance:
Technique effect of the present invention is to adopt indirect way, and having solved two ground network ground resistances measurements needs several kilometers far away by rules requirement wiring, the problem of difficult wiring.
Description of drawings
Accompanying drawing 1 is workflow synoptic diagram of the present invention
Accompanying drawing 2 is two earth mat mutual resistance instrumentation plans
Concrete embodiment
Below in conjunction with accompanying drawing, the present invention is done further detailed description.Workflow diagram of the present invention is seen shown in the accompanying drawing 1.Promptly the present invention includes following steps:
The first step adds power supply and reometer (shown in accompanying drawing 2) between the connecting line between major network and the auxilliary net, the reading U and the I of recording power and reometer, and then calculate r by following formula
0:
Such as Yunnan 500kV transformer station, surveying out U according to accompanying drawing 2 methods is 100V, and I is 11.4A, can calculate the mutual resistance r between major network and the auxilliary net thus
0It is 8.8 ohm.
In second step, measure major network and the auxilliary stake resistance r that nets
1And r
2In the above-listed instance, can adopt rules recommend method (being GB/T 17949.1-2000 " soil resistivity of earthed system, impedance ground and ground potential are measured guide rule ") to record major network stake resistance r
1Be 7.6 ohm, auxilliary net stake resistance r
2It is 4.4 ohm.
In the 3rd step,, can confirm the stake resistance R of two earth mats by following formula according to above-mentioned two pacing amount results.The ground network ground resistance value is 3.5 ohm in this instance.
It is thus clear that the present invention adopts indirect method, solved the problem that two ground network ground resistances are measured difficult wiring, obtained the stake resistance of two earth mats.
Claims (1)
1. the measuring method of two ground network ground resistances is characterized in that comprising following step:
The first step adds power supply and reometer on the connecting line between two earth mats, through measuring electric current I and voltage U, can try to achieve the mutual resistance r of two earth mats
0:
In the formula, I is an electric current, and U is a voltage;
In second step, measure major network and the auxilliary stake resistance r that nets respectively
1, r
2
The 3rd step: confirm two ground network ground resistance R according to following formula:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102387082A CN101937022B (en) | 2010-07-28 | 2010-07-28 | Method for measuring ground resistance of double ground network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102387082A CN101937022B (en) | 2010-07-28 | 2010-07-28 | Method for measuring ground resistance of double ground network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101937022A CN101937022A (en) | 2011-01-05 |
| CN101937022B true CN101937022B (en) | 2012-08-22 |
Family
ID=43390459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102387082A Expired - Fee Related CN101937022B (en) | 2010-07-28 | 2010-07-28 | Method for measuring ground resistance of double ground network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101937022B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0864873A1 (en) * | 1997-03-12 | 1998-09-16 | Siemens Aktiengesellschaft | Procedure for determining the grounding resistance and house wiring adapted for same |
| CN101458728A (en) * | 2008-11-18 | 2009-06-17 | 中国电力工程顾问集团西南电力设计院 | Computation method for ground network ground resistance in vertical double-layer soil |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4652236B2 (en) * | 2005-01-25 | 2011-03-16 | 長谷川電機工業株式会社 | Ground resistance measuring device |
| KR100609713B1 (en) * | 2005-04-27 | 2006-08-08 | 한국전자통신연구원 | Grounding resistance measurement and soil structure detection using the slope degree of voltage differences |
| JP2009216599A (en) * | 2008-03-11 | 2009-09-24 | Chugoku Electric Power Co Inc:The | Device and method for measuring earth resistance |
| US20100134114A1 (en) * | 2008-12-03 | 2010-06-03 | Korea Electric Power Corporation | Apparatus and Method for Three-Pole Type Measuring Specific Soil Resistance Measurement for Distribution Grounding |
-
2010
- 2010-07-28 CN CN2010102387082A patent/CN101937022B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0864873A1 (en) * | 1997-03-12 | 1998-09-16 | Siemens Aktiengesellschaft | Procedure for determining the grounding resistance and house wiring adapted for same |
| CN101458728A (en) * | 2008-11-18 | 2009-06-17 | 中国电力工程顾问集团西南电力设计院 | Computation method for ground network ground resistance in vertical double-layer soil |
Non-Patent Citations (4)
| Title |
|---|
| JP特开2006-234800A 2006.09.07 |
| JP特开2009-216599A 2009.09.24 |
| 周炜明，等.接地模块对地网接地电阻的影响.《电瓷避雷器》.2008,(第2期),全文. * |
| 曹晓斌,等.一类垂直双层土壤中地网接地电阻的简易计算公式.《中国电机工程学报》.2009,第29卷(第1期),全文. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101937022A (en) | 2011-01-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102221644B (en) | System and method for online monitoring grounding networks of power stations and substations | |
| CN107609208B (en) | Traction network modeling method considering tunnel section comprehensive grounding system structure | |
| CN104698313B (en) | DC magnetic bias current influences the Forecasting Methodology of website under many direct current grounding pole different running methods | |
| CN206002050U (en) | A kind of frost zone thickness monitor device | |
| CN106093534A (en) | A kind of method testing earth mat step voltage and contact voltage | |
| CN101900764A (en) | Method for measuring grounded resistance of grounded screen by short range measuring method | |
| CN101900766A (en) | Method for determining position of voltage electrode in measurement of grounding resistance in transformer substation by short-distance method | |
| CN108647438A (en) | A kind of new soil equivalent resistance model modeling method | |
| CN107462802B (en) | State evaluation method for 500kV underground substation grounding system | |
| CN103326139B (en) | Hollow aluminum alloy tube grounding device capable of being assembled | |
| CN110068735B (en) | Method for measuring and calculating contact resistance between grounding body and soil | |
| CN106021652B (en) | A kind of method for building up of the earth soil solid resistance network model | |
| CN107192885A (en) | Using alien frequencies, the method for high-current test large hydropower station Grounding impedance | |
| CN110119544B (en) | Spiral grounding electrode size parameter design method suitable for complex environment area | |
| CN205104914U (en) | Perpendicular type earthing pole arrangement structure of high voltage direct current | |
| CN104953434A (en) | Design method of novel multi-pin vertical earthing system | |
| CN104318003A (en) | TDCM (three-dimensional combined-layer soil model)-based transformer substation ESP (earth surface potential) calculation and address selection detection method | |
| Nassereddine et al. | Estimation of apparent soil resistivity for two-layer soil structure | |
| CN101937022B (en) | Method for measuring ground resistance of double ground network | |
| CN101900765A (en) | Method for building equivalent grounding network computation model | |
| Wang et al. | Seasonal variations of tower footing impedance in various transmission line grounding systems | |
| CN205982675U (en) | Test system is gathered in parallel electric method datacycle | |
| Adelian | Improvement of substation earthing | |
| CN205875130U (en) | Reduce underground substation ground resistance's building pile foundation | |
| CN109188333A (en) | A kind of Resistance of Grounding Grids small scale test model and modification method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120822 Termination date: 20140728 |
|
| EXPY | Termination of patent right or utility model |