CN104897558A - Method for evaluating corrosivity index of transformer station soil to copper grounding grid - Google Patents
Method for evaluating corrosivity index of transformer station soil to copper grounding grid Download PDFInfo
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- CN104897558A CN104897558A CN201510314174.XA CN201510314174A CN104897558A CN 104897558 A CN104897558 A CN 104897558A CN 201510314174 A CN201510314174 A CN 201510314174A CN 104897558 A CN104897558 A CN 104897558A
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- copper evaluation
- solubility
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 132
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 132
- 239000010949 copper Substances 0.000 title claims abstract description 132
- 239000002689 soil Substances 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000011156 evaluation Methods 0.000 claims abstract description 133
- 239000000126 substance Substances 0.000 claims abstract description 7
- 238000005260 corrosion Methods 0.000 claims description 58
- 230000007797 corrosion Effects 0.000 claims description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 230000033116 oxidation-reduction process Effects 0.000 claims description 17
- 229910001369 Brass Inorganic materials 0.000 claims description 13
- 239000010951 brass Substances 0.000 claims description 13
- 238000012360 testing method Methods 0.000 claims description 13
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 12
- 239000008397 galvanized steel Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 5
- 229910000906 Bronze Inorganic materials 0.000 claims description 4
- 239000010974 bronze Substances 0.000 claims description 4
- 239000004927 clay Substances 0.000 claims description 4
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 2
- 239000004576 sand Substances 0.000 claims description 2
- 238000010998 test method Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000011160 research Methods 0.000 description 8
- 238000004458 analytical method Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Abstract
The invention relates to a method for evaluating the corrosivity index of transformer station soil to a copper grounding grid, and aims to solve the problem that impact of two factors of annual mean environmental temperature and soil air capacity of the region of a transformer station are not taken into consideration, so that the evaluation result is inaccurate. The method is characterized by comprising the following steps: step I, collecting a soil sample in the transformer station; step II, conducting physical and chemical property index detection on the soil sample; step III, evaluating the corrosivity index of the soil sample to the copper grounding grid. The method is applied to the field of transformer stations.
Description
Technical field
The present invention relates to transformer station's soil to the corrosive index Evaluation Method of copper & brass.
Background technology
Electric power grounding grid is the important leverage of generating, power transformation and power transmission system safe operation, is the requisite measure ensureing power equipment and personal safety.The point of electric system is connected with the earth by grounded screen, provides the leakage path of fault current and lightning current, stable potential, provides zero potential to join point.Grounded screen is concealed work, and the life-span of its designing requirement and peripheral facilities is suitable, generally should be more than or equal to 30 years.Because earthing device is in the severe running environment in underground for a long time, chemical corrosion and the galvanic corrosion of soil are inevitable, also to bear the corrosion of earth mat diffusing and stray current simultaneously, therefore, affect a lot of because have of ground net corrosion, wherein the corrosion of soil is the factor of most critical, and the physicochemical property of soil determine its corrosive property.
Soil to corrosion of metal with one simply amount just can show, neither be easy to record from soil, it is relevant with many factors.Although many countries at the beginning of last century have just started the research work of soil corrosion, but it is more completely theoretical still can not to form a ratio so far, its main cause be as the soil of corrosive medium compared with general corrosion medium, there is the various features such as diversity, nonflowing character, unevenness, time seasonal and region.
The net result of transformer station's soil corrosion performance analysis evaluates its corrosive nature, and science judges the corrosive nature of soil exactly.Along with the development of electrical network, the expansion of substation capacity, require more and more stricter to the safe reliability of grounded screen, therefore the research method setting up, improve and develop ground net corrosion has important scientific meaning and economic worth, is avoid the requisite measure of grounded screen because being made the safe operation of electrical network be subject to potential threat by soil corrosion.
Abroad, judge that the index Evaluation Method of soil corrosion performance mainly contains the DIN50929 standard of Germany and the ANSI A21.5 evaluation assessment of the U.S., in China, Duo Jia electric power scientific research department is through experimental study for many years, it is also proposed the index Evaluation Method of soil corrosivity, as Jiangxi Province Electric power Science Academe (application publication number CN 103278616 A), Gansu Electric Power Corporation, Electric Power Research Institute (application publication number CN 103278616 A), Electric Power Research Institute of State Grid Hubei Electric Power Company (application publication number CN 103499680 A) and Electric Power Research Institute of State Grid Zhejiang Electric Power Company (application publication number CN 104299032 A) etc., for soil corrosion Journal of Sex Research and judgement provide useful viewpoint.But, in above-mentioned standard and method, mainly for the corrosion evaluation of carbon steel, be not suitable for copper grounding grid; And do not consider the impact of transformer station region year average ambient temperature and these two factors of soil air capacity.Because copper is the widely used grounded screen material of electricity substation, therefore, the present invention, according to experimental study achievement for many years, proposes the evaluation method of transformer station's soil to copper grounding grid corrosive nature.
Summary of the invention
The present invention will solve the impact that existing method does not consider transformer station region year average ambient temperature and these two factors of soil air capacity, cause the inaccurate problem of evaluation result, and provide transformer station's soil to the corrosive index Evaluation Method of copper & brass.
Transformer station's soil, to the corrosive index Evaluation Method of copper & brass, is characterized in that it realizes according to the following steps:
One, transformer station's pedotheque is gathered;
Two, the physics of transformer station's pedotheque and chemical property index are detected;
Three, transformer station's pedotheque is evaluated copper & brass corrosive nature:
According to soil types, soil resistivity, pH value, water cut, solubility Cl
-amount, solubility SO
4 2-the testing result of content, air containment, oxidation-reduction potential and region average temperature of the whole year nine indexs, by the evaluation number defining method of transformer station's soil to galvanized steel ground grid corrosive nature, determines the copper evaluation number Z of each index
i, and calculate overall merit index B
e, adopt soil to evaluate soil to the corrosive nature of galvanized steel ground grid to copper corrosion performance Assessment for classification.
Invention effect:
Copper is excellent grounded screen material, resistivity is little, corrosion resistance is strong, increased gradually in the application of China in recent years, according to achievement in research, the invention provides a kind of transformer station soil to corrosive eight index Evaluation Methods of copper & brass, adopt soil types, resistivity, pH value, water cut, solubility Cl
-content, solubility SO
4 2-content, air containment, oxidation-reduction potential and transformer station's region average temperature of the whole year nine indexs, evaluate soil to galvanized steel material ground net corrosion performance, the method is simple and practical, consider that influence factor is comprehensive, therefore accuracy is good, actual to excavate result close with earth mat, has promotional value more widely.
Solve because soil has the various features such as diversity, nonflowing character, unevenness, time seasonality and region to corrosion of metal, adopt soil types, resistivity, pH value, water cut, solubility Cl
-content, solubility SO
4 2-content, air containment and oxidation-reduction potential nine indexs, propose the erosion analysis method of soil to galvanized steel ground grid first.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention.
Embodiment
Embodiment one: transformer station's soil of present embodiment, to the corrosive index Evaluation Method of copper & brass, is characterized in that it realizes according to the following steps:
One, transformer station's pedotheque is gathered;
Two, the physics of transformer station's pedotheque and chemical property index are detected;
Three, transformer station's pedotheque is evaluated copper & brass corrosive nature:
According to soil types, soil resistivity, pH value, water cut, solubility Cl
-amount, solubility SO
4 2-the testing result of content, air containment, oxidation-reduction potential and region average temperature of the whole year nine indexs, by the evaluation number defining method of transformer station's soil to galvanized steel ground grid corrosive nature, determines the copper evaluation number Z of each index
i, and calculate overall merit index B
e, adopt soil to evaluate soil to the corrosive nature of galvanized steel ground grid to copper corrosion performance Assessment for classification.
Embodiment two: present embodiment and embodiment one unlike: step one is specially:
Select a certain diagonal line in transformer station place, diagonally dig testing pits of 4 each and every one diameter 0.8 ~ 1.0m; Wherein, each spacing 10m of testing pits ~ 11m, the degree of depth of testing pits is identical with the actual depth of burying of this grounding net of transformer substation; In each testing pits, get pedotheque respectively and be about 2kg ~ 2.5kg.
Other step and parameter identical with embodiment one.
Embodiment three: present embodiment and embodiment one or two unlike: step 2 is specially:
According to " material soil corrosion test method " that national soil corrosion test website is write, according to the correlativity between the extent of corrosion of galvanized steel ground grid and soil physico-chemical property, sample collection is carried out to transformer station's soil, to soil types, soil resistivity, pH value, water cut, solubility Cl
-content, solubility SO
4 2-content, air containment and oxidation-reduction potential detect, and obtain the Monitoring Data of region average temperature of the whole year from the weather bureau of transformer station location.
Other step and parameter identical with embodiment one or two.
Embodiment four: one of present embodiment and embodiment one to three unlike: described in step 3 by transformer station's soil to the evaluation number defining method of galvanized steel ground grid corrosive nature, determine the copper evaluation number Z of each index
i(i=1,2,4,5,6,7,8 or 9) is specially:
Soil types (X
1) copper evaluation number Z
1concrete grammar is:
The copper evaluation number Z of sand
1be 2, the copper evaluation number Z of sandy loam
1be 1, the copper evaluation number Z of loam
1be 0, the copper evaluation number Z of loam clay
1be 0, the copper evaluation number Z of clay
1for-1;
Soil resistivity (X
2), Ω m copper evaluation number Z
2concrete grammar is:
Soil resistivity (X
2) > 500 time copper evaluation number Z
2be 1, soil resistivity (X
2) copper evaluation number Z when being 200 ~ 500
2be 1, soil resistivity (X
2) copper evaluation number Z when being 100 ~ 200
2be 1, soil resistivity (X
2) copper evaluation number Z when being 50 ~ 100
2be 0, soil resistivity (X
2) time 20 ~ 50 bronze medal evaluation number Z
2be 0, soil resistivity (X
2) be 10 ~ 20 with soil resistivity (X
2) < 10 bronze medal evaluation number Z
2for-1;
Water cut (X
3), massfraction (%) copper evaluation number Z
3concrete grammar is:
Water cut (X
3copper evaluation number Z during)≤5
3be 0, water cut (X
3) copper evaluation number Z when being 5 ~ 10
3for-1, water cut (X
3) copper evaluation number Z when being 10 ~ 20
3for-2, water cut (X
3) copper evaluation number Z when being 20 ~ 30
3for-1, water cut (X
3) > 30 time copper evaluation number Z
3be 0;
Air containment (X
4), volume fraction (%) copper evaluation number Z
4concrete grammar is:
Air containment (X
4) be copper evaluation number Z during water logging
4for-1, air containment (X
4) copper evaluation number Z when being 0 ~ 10
4be 1, air containment (X
4) copper evaluation number Z when being 10 ~ 20
4be 0, air containment (X
4) copper evaluation number Z when being 20 ~ 30
4for-1, air containment (X
4) > 30 time copper evaluation number Z
4for-2;
PH value (X
5) copper evaluation number Z
5concrete grammar is:
PH value (X
5) > 9 time copper evaluation number Z
5be 2, pH value (X
5) copper evaluation number Z when being 6.5 ~ 9
5be 3, pH value (X
5) copper evaluation number Z when being 5.5 ~ 6.5
5be 1, pH value (X
5) copper evaluation number Z when being 4 ~ 5.5
5for-2, pH value (X
5) < 4 time copper evaluation number Z
5for-4;
Solubility Cl
-content (X
6), mg/kg copper evaluation number Z
6concrete grammar is:
Solubility Cl
-content (X
6) < 100 time copper evaluation number Z
6be 1, solubility Cl
-content (X
6) copper evaluation number Z when being 100 ~ 500
6be 0, solubility Cl
-content (X
6) copper evaluation number Z when being 500 ~ 1000
6be 0, solubility Cl
-content (X
6) copper evaluation number Z when being 1000 ~ 2000
6for-1, solubility Cl
-content (X
6) copper evaluation number Z when being 2000 ~ 5000
6for-1, solubility Cl
-content (X
6) be copper evaluation number Z during > 5000
6for-2;
Solubility SO
4 2-content (X
7), mg/kg copper evaluation number Z
7concrete grammar is:
Solubility SO
4 2-content (X
7) < 100 time copper evaluation number Z
7be 0, solubility SO
4 2-content (X
7) copper evaluation number Z when being 100 ~ 300
7be 0, solubility SO
4 2-content (X
7) copper evaluation number Z when being 300 ~ 500
7be 0, solubility SO
4 2-content (X
7) copper evaluation number Z when being 500 ~ 800
7be 0, solubility SO
4 2-content (X
7) > 800 time copper evaluation number Z
7for-1;
Oxidation-reduction potential Eh7 (X
8), mV copper evaluation number Z
8concrete grammar is:
Oxidation-reduction potential Eh7 (X
8) > 400, oxidation-reduction potential Eh7 (X
8) be 200 ~ 400, oxidation-reduction potential Eh7 (X
8) be 100 ~ 200 with oxidation-reduction potential Eh7 (X
8) < 100 time copper evaluation number Z
8be 0;
Region average temperature of the whole year (X
9), DEG C copper evaluation number Z
9concrete grammar is:
Region average temperature of the whole year (X
9copper evaluation number Z during)≤-5
9be 1, region average temperature of the whole year (X
9) copper evaluation number Z when being-5 ~ 0
9be 0, region average temperature of the whole year (X
9) copper evaluation number Z when being 0 ~ 5
9for-1, region average temperature of the whole year (X
9) copper evaluation number Z when being 5 ~ 10
9for-1, region average temperature of the whole year (X
9) copper evaluation number Z when being 10 ~ 20
9for-2, region average temperature of the whole year (X
9) copper evaluation number Z when being 10 ~ 20
9for-2;
Wherein, described soil is to copper corrosion performance Assessment for classification:
Work as B
eduring value>=-1, spot corrosion or the layer corrosion hole degree of depth are < 0.1mm/a, uniform corrosion rate < 0.02mm/a, and corrosive nature is slight;
Work as B
ewhen value is-2 ,-3 or-4, spot corrosion or the layer corrosion hole degree of depth are 0.1 ~ 0.5mm/a, uniform corrosion rate 0.02 ~ 0.05mm/a, and corrosive nature is weak;
Work as B
ewhen value is-5 or-6, spot corrosion or the layer corrosion hole degree of depth are 0.5 ~ 1.0mm/a, uniform corrosion rate 0.05 ~ 0.10mm/a, and corrosive nature is medium;
Work as B
ewhen value is-7 or-8, spot corrosion or the layer corrosion hole degree of depth are 1.0 ~ 1.5mm/a, uniform corrosion rate 0.10 ~ 0.20mm/a, and corrosive nature is strong;
Work as B
evalue for≤-9 time, spot corrosion or layer corrosion hole the degree of depth be > 1.5mm/a, uniform corrosion rate > 0.20mm/a, corrosive nature is very strong;
Wherein, described B
e=Z
1+ Z
2+ Z
3+ Z
4+ Z
5+ Z
6+ Z
7+ Z
8+ Z
9.
Claims (4)
1. transformer station's soil is to the corrosive index Evaluation Method of copper & brass, it is characterized in that it realizes according to the following steps:
One, transformer station's pedotheque is gathered;
Two, the physics of transformer station's pedotheque and chemical property index are detected;
Three, transformer station's pedotheque is evaluated copper & brass corrosive nature:
According to soil types, soil resistivity, pH value, water cut, solubility Cl
-amount, solubility SO
4 2-the testing result of content, air containment, oxidation-reduction potential and region average temperature of the whole year nine indexs, by the evaluation number defining method of transformer station's soil to galvanized steel ground grid corrosive nature, determines the copper evaluation number Z of each index
i, and calculate overall merit index B
e, adopt soil to evaluate soil to the corrosive nature of galvanized steel ground grid to copper corrosion performance Assessment for classification.
2. transformer station according to claim 1 soil is to the corrosive index Evaluation Method of copper & brass, it is characterized in that step one is specially:
Select a certain diagonal line in transformer station place, diagonally dig testing pits of 4 each and every one diameter 0.8 ~ 1.0m; Wherein, each spacing 10m of testing pits ~ 11m, the degree of depth of testing pits is identical with the actual depth of burying of this grounding net of transformer substation; In each testing pits, get pedotheque respectively and be about 2kg ~ 2.5kg.
3. transformer station according to claim 2 soil is to the corrosive index Evaluation Method of copper & brass, it is characterized in that step 2 is specially:
According to " material soil corrosion test method " that national soil corrosion test website is write, according to the correlativity between the extent of corrosion of galvanized steel ground grid and soil physico-chemical property, sample collection is carried out to transformer station's soil, to soil types, soil resistivity, pH value, water cut, solubility Cl
-content, solubility SO
4 2-content, air containment and oxidation-reduction potential detect, and obtain the Monitoring Data of region average temperature of the whole year from the weather bureau of transformer station location.
4. transformer station according to claim 3 soil is to the corrosive index Evaluation Method of copper & brass, to it is characterized in that described in step 3, by the evaluation number defining method of transformer station's soil to galvanized steel ground grid corrosive nature, determining the copper evaluation number Z of each index
i(i=1,2,4,5,6,7,8 or 9) is specially:
Soil types (X
1) copper evaluation number Z
1concrete grammar is:
The copper evaluation number Z of sand
1be 2, the copper evaluation number Z of sandy loam
1be 1, the copper evaluation number Z of loam
1be 0, the copper evaluation number Z of loam clay
1be 0, the copper evaluation number Z of clay
1for-1;
Soil resistivity (X
2), Ω m copper evaluation number Z
2concrete grammar is:
Soil resistivity (X
2) > 500 time copper evaluation number Z
2be 1, soil resistivity (X
2) copper evaluation number Z when being 200 ~ 500
2be 1, soil resistivity (X
2) copper evaluation number Z when being 100 ~ 200
2be 1, soil resistivity (X
2) copper evaluation number Z when being 50 ~ 100
2be 0, soil resistivity (X
2) time 20 ~ 50 bronze medal evaluation number Z
2be 0, soil resistivity (X
2) be 10 ~ 20 with soil resistivity (X
2) < 10 bronze medal evaluation number Z
2for-1;
Water cut (X
3), massfraction (%) copper evaluation number Z
3concrete grammar is:
Water cut (X
3copper evaluation number Z during)≤5
3be 0, water cut (X
3) copper evaluation number Z when being 5 ~ 10
3for-1, water cut (X
3) copper evaluation number Z when being 10 ~ 20
3for-2, water cut (X
3) copper evaluation number Z when being 20 ~ 30
3for-1, water cut (X
3) > 30 time copper evaluation number Z
3be 0;
Air containment (X
4), volume fraction (%) copper evaluation number Z
4concrete grammar is:
Air containment (X
4) be copper evaluation number Z during water logging
4for-1, air containment (X
4) copper evaluation number Z when being 0 ~ 10
4be 1, air containment (X
4) copper evaluation number Z when being 10 ~ 20
4be 0, air containment (X
4) copper evaluation number Z when being 20 ~ 30
4for-1, air containment (X
4) > 30 time copper evaluation number Z
4for-2;
PH value (X
5) copper evaluation number Z
5concrete grammar is:
PH value (X
5) > 9 time copper evaluation number Z
5be 2, pH value (X
5) copper evaluation number Z when being 6.5 ~ 9
5be 3, pH value (X
5) copper evaluation number Z when being 5.5 ~ 6.5
5be 1, pH value (X
5) copper evaluation number Z when being 4 ~ 5.5
5for-2, pH value (X
5) < 4 time copper evaluation number Z
5for-4;
Solubility Cl
-content (X
6), mg/kg copper evaluation number Z
6concrete grammar is:
Solubility Cl
-content (X
6) < 100 time copper evaluation number Z
6be 1, solubility Cl
-content (X
6) copper evaluation number Z when being 100 ~ 500
6be 0, solubility Cl
-content (X
6) copper evaluation number Z when being 500 ~ 1000
6be 0, solubility Cl
-content (X
6) copper evaluation number Z when being 1000 ~ 2000
6for-1, solubility Cl
-content (X
6) copper evaluation number Z when being 2000 ~ 5000
6for-1, solubility Cl
-content (X
6) be copper evaluation number Z during > 5000
6for-2;
Solubility SO
4 2-content (X
7), mg/kg copper evaluation number Z
7concrete grammar is:
Solubility SO
4 2-content (X
7) < 100 time copper evaluation number Z
7be 0, solubility SO
4 2-content (X
7) copper evaluation number Z when being 100 ~ 300
7be 0, solubility SO
4 2-content (X
7) copper evaluation number Z when being 300 ~ 500
7be 0, solubility SO
4 2-content (X
7) copper evaluation number Z when being 500 ~ 800
7be 0, solubility SO
4 2-content (X
7) > 800 time copper evaluation number Z
7for-1;
Oxidation-reduction potential Eh7 (X
8), mV copper evaluation number Z
8concrete grammar is:
Oxidation-reduction potential Eh7 (X
8) > 400, oxidation-reduction potential Eh7 (X
8) be 200 ~ 400, oxidation-reduction potential Eh7 (X
8) be 100 ~ 200 with oxidation-reduction potential Eh7 (X
8) < 100 time copper evaluation number Z
8be 0;
Region average temperature of the whole year (X
9), DEG C copper evaluation number Z
9concrete grammar is:
Region average temperature of the whole year (X
9copper evaluation number Z during)≤-5
9be 1, region average temperature of the whole year (X
9) copper evaluation number Z when being-5 ~ 0
9be 0, region average temperature of the whole year (X
9) copper evaluation number Z when being 0 ~ 5
9for-1, region average temperature of the whole year (X
9) copper evaluation number Z when being 5 ~ 10
9for-1, region average temperature of the whole year (X
9) copper evaluation number Z when being 10 ~ 20
9for-2, region average temperature of the whole year (X
9) copper evaluation number Z when being 10 ~ 20
9for-2;
Wherein, described soil is to copper corrosion performance Assessment for classification:
Work as B
eduring value>=-1, spot corrosion or the layer corrosion hole degree of depth are < 0.1mm/a, uniform corrosion rate < 0.02mm/a, and corrosive nature is slight;
Work as B
ewhen value is-2 ,-3 or-4, spot corrosion or the layer corrosion hole degree of depth are 0.1 ~ 0.5mm/a, uniform corrosion rate 0.02 ~ 0.05mm/a, and corrosive nature is weak;
Work as B
ewhen value is-5 or-6, spot corrosion or the layer corrosion hole degree of depth are 0.5 ~ 1.0mm/a, uniform corrosion rate 0.05 ~ 0.10mm/a, and corrosive nature is medium;
Work as B
ewhen value is-7 or-8, spot corrosion or the layer corrosion hole degree of depth are 1.0 ~ 1.5mm/a, uniform corrosion rate 0.10 ~ 0.20mm/a, and corrosive nature is strong;
Work as B
evalue for≤-9 time, spot corrosion or layer corrosion hole the degree of depth be > 1.5mm/a, uniform corrosion rate > 0.20mm/a, corrosive nature is very strong;
Wherein, described B
e=Z
1+ Z
2+ Z
3+ Z
4+ Z
5+ Z
6+ Z
7+ Z
8+ Z
9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510314174.XA CN104897558A (en) | 2015-06-09 | 2015-06-09 | Method for evaluating corrosivity index of transformer station soil to copper grounding grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510314174.XA CN104897558A (en) | 2015-06-09 | 2015-06-09 | Method for evaluating corrosivity index of transformer station soil to copper grounding grid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104897558A true CN104897558A (en) | 2015-09-09 |
Family
ID=54030361
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510314174.XA Pending CN104897558A (en) | 2015-06-09 | 2015-06-09 | Method for evaluating corrosivity index of transformer station soil to copper grounding grid |
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| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675475B (en) * | 2015-12-25 | 2018-10-30 | 西安科技大学 | A kind of ground net corrosion speed grade prediction technique |
| CN110542644A (en) * | 2019-08-30 | 2019-12-06 | 国网河北省电力有限公司电力科学研究院 | method for evaluating corrosion degree of trenchless grounding grid of transformer substation |
| CN110794216A (en) * | 2019-11-14 | 2020-02-14 | 云南电网有限责任公司西双版纳供电局 | Grounding state detection device and detection method thereof |
| CN114166732A (en) * | 2021-11-10 | 2022-03-11 | 西南交通大学 | Grounding device service life assessment method considering influence of highly corrosive soil |
-
2015
- 2015-06-09 CN CN201510314174.XA patent/CN104897558A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675475B (en) * | 2015-12-25 | 2018-10-30 | 西安科技大学 | A kind of ground net corrosion speed grade prediction technique |
| CN110542644A (en) * | 2019-08-30 | 2019-12-06 | 国网河北省电力有限公司电力科学研究院 | method for evaluating corrosion degree of trenchless grounding grid of transformer substation |
| CN110542644B (en) * | 2019-08-30 | 2021-12-31 | 国网河北省电力有限公司电力科学研究院 | Method for evaluating corrosion degree of trenchless grounding grid of transformer substation |
| CN110794216A (en) * | 2019-11-14 | 2020-02-14 | 云南电网有限责任公司西双版纳供电局 | Grounding state detection device and detection method thereof |
| CN114166732A (en) * | 2021-11-10 | 2022-03-11 | 西南交通大学 | Grounding device service life assessment method considering influence of highly corrosive soil |
| CN114166732B (en) * | 2021-11-10 | 2022-07-19 | 西南交通大学 | Grounding device service life assessment method considering influence of highly corrosive soil |
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