CN109361080A - Resistance method efficiently drops in a kind of substation - Google Patents
Resistance method efficiently drops in a kind of substation Download PDFInfo
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- CN109361080A CN109361080A CN201811167762.5A CN201811167762A CN109361080A CN 109361080 A CN109361080 A CN 109361080A CN 201811167762 A CN201811167762 A CN 201811167762A CN 109361080 A CN109361080 A CN 109361080A
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- substation
- soil
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- charcoal bed
- resistivity
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Of Electrical Connectors (AREA)
Abstract
The invention discloses a kind of substations efficiently to drop resistance method, the following steps are included: the first step, survey soil, establish soil model, survey crew survey soil resistivity, frost penetration and the soil layering situation in substation location region using Soil K+adsorption instrument, and soil model is established according to the transversely layered data of the soil of exploration and longitudinal layered data, the earthing or grounding means in design station in substation location region carries out security verification to the earthing or grounding means of design.Resistance method efficiently drops in the substation; by being embedded to charcoal bed in substation location region; and use high-silicon chromium iron stick as the leading body of charcoal bed electrode; the friction reducer in metal bucket or metal trough is poured into cooperation, can effectively reduce the resistivity between grounding body and soil, and improve and keep the electric conductivity of substation location regional soil; to keep ground resistance up to standard; improve resistance reducing effect, improves Transformer Substation Lightning Protection performance, effective protection substation, transformer station personnel and equipment.
Description
Technical field
The present invention relates to electric power project engineering field, resistance method efficiently drops in specially a kind of substation.
Background technique
Substation, which refers in electric system, converts voltage and current, receives electric energy and distributes the place of electric energy,
Substation in power plant is primary substation, and effect is to be fed to high-voltage fence after the electric energy that generator issues boosts
In, there have been substation since being established first electric system truly, substation can not as electric system
Or scarce part, and electric system joint development more than 100 years, in this more than 100 years development course, substation was building field
Huge variation all has occurred in ground, voltage class and equipment situation etc., on the build the side of substation, by original complete
Gradually there is indoor substation and some underground substations, the occupied area and original of substation in portion's open type outdoor substation
The open type outdoor substation come is many compared to reducing.
Substation grounding device is the indispensable measure of electrical safety, and conventional ground connection is to connect round steel or band steel manufacturing artificial
Ground, for reducing ground resistance, but artificial earthing is influenced by place and geological conditions, and ground resistance has not up to standard often
Situation, unstable for the drop resistance of substation, resistance reducing effect is poor, causes Transformer Substation Lightning Protection poor, for substation, substation people
There are larger harm for member and equipment.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of substations efficiently to drop resistance method, solves ground resistance
Often there is situation not up to standard, unstable for the drop resistance of substation, resistance reducing effect is poor, and cause Transformer Substation Lightning Protection poor, for
There is larger endanger in substation, transformer station personnel and equipment.
To achieve the above object, the invention provides the following technical scheme: resistance method efficiently drops in a kind of substation, including it is following
Step:
Step 1: exploration soil, establishes soil model
Survey crew are using Soil K+adsorption instrument to soil resistivity, frost penetration and the soil layering in substation location region
Situation is surveyed, and establishes soil model according to the transversely layered data of the soil of exploration and longitudinal layered data, in substation
Earthing or grounding means in design station in the region of site carries out security verification to the earthing or grounding means of design, obtains check results, save school
It is qualified as a result, simultaneously the best check results in constituency draw construction drawing to test, and construction personnel carries out site operation according to construction drawing；
Step 2: digging pit and burying the arrangement in hole
One is dug on the soil layer in substation location region according to vertical-type or the requirement of horizontal type construction method according to construction drawing
After a truncated cone-shaped or rectangle dell, a zinc-plated truncated cone-shaped metal bucket or hot galvanizing rectangle metal trough are put into the bottom in hole, iron
Bucket is put into truncated cone-shaped heatable adobe sleeping platform, and metal trough is put into rectangle trench；
Step 3: embedded charcoal bed
It is put into charcoal bed ground connection in the bottom of metal bucket or metal trough, the leading body using high-silicon chromium iron stick as charcoal bed electrode, using YJV
High-silicon chromium iron stick is led on grounded screen steel by insulating sheath cable, by the new process of exothermic weld to grounded screen steel and height
The junction of silicochromium iron staff is welded, and is sealed anti-corrosion to Exothermic welded connections using epoxy resin, uses friction reducer
The bottom that connecting line on metal bucket or metal trough is welded on high-silicon chromium iron stick is drawn on galvanized sheet, high-silicon chromium iron stick top lead-out wire
Weld together with major network zinc-coated flat steel sheet, then pours into the friction reducer being stirred in advance in metal bucket or metal trough, friction reducer is put into
Number should be lower than 30 millimeters of metal bucket or metal trough upper end；
Step 4: pit slot backfills
Into the metal bucket or metal trough for buried charcoal bed, the fine clay for setting and being stirred in advance is filled out in layering, and every layer of backfill thickness is about 300
Millimeter or so, until the upper end of metal bucket or metal trough is completely covered in fine clay, then in fine clay surface uniform sprinkling；
Step 5: charcoal bed buries the compacting in hole
Weathering is paved at the gap of truncated cone-shaped metal bucket or hot galvanizing rectangle metal trough and dell and at the top of metal bucket or metal trough
Rock ballast bed course, smooth location completely ram one time, levelling, spread geotextiles again, are rolled eight times with vibrating roller.
Preferably, the charcoal bed is layered with 95% or more carbon containing petroleum calcined coke and is laid with, and charcoal bed surface uses waveform
Design, charcoal bed are located at -0.8 meter~-1.2 meters, and the length of high-silicon chromium iron stick is 2.4 meters~2.5m meters, and grounded screen steel use 60*
8 zinc-coated flat steel sheets, the area of section of band steel are greater than 300 square millimeters, and thickness is greater than 6 millimeters of band steel.
Preferably, the new process by exothermic weld to the lead junction of grounded screen steel and high-silicon chromium iron stick into
Before row welding, grounded screen steel need to be cleaned out, and when welding first solder joint, welding powder dosage should be slightly less than grounded screen
The lead connector of steel and high-silicon chromium iron stick makes grounded screen steel and mold coincide good, avoids welding fluid stream using C-type clamp tool
Out.
Preferably, the survey crew are selected using Soil K+adsorption instrument to the soil resistivity in substation location region
The central point in substation location region is arranged apart from the symmetrical two groups of measuring electrodes of survey child's central point, utilizes described at least two
Group measuring electrode measures the substation location regional soil resistivity, and two groups of measuring electrodes exchange electrode is corrected
Measurement obtains correction substation location regional soil resistivity, when the substation location regional soil resistivity and correction power transformation
When the error of site regional soil resistivity is less than preset value, then by the substation location regional soil repeatedly measured electricity
Resistance rate average value is determined as substation location regional soil resistivity.
Preferably, when prepared by the high-silicon chromium iron stick, implement casting according to the following ratio.
Component list
| Serial number | Title | Required value |
| 1 | Silicon | 14.25~15.25% |
| 2 | Manganese | ≤0.5% |
| 3 | Carbon | <1.4% |
| 4 | Phosphorus (P) | <0.25% |
| 5 | Sulphur (S) | <0.1% |
| 6 | Chromium | 4%~5% |
| 7 | Molybdenum | ≤0.2% |
| 8 | Copper | ≤0.5% |
| 9 | Iron | Surplus |
Technical indicator meets following require
Physical characteristic
| Serial number | Title | Index |
| 1 | Resistivity (Ω-cm) at 20 DEG C | < 0.5 |
| 2 | Compression strength (MPa) | > 690 |
| 3 | Tensile strength (MPa) | > 103 |
| 4 | Specific gravity (g/cm3) | 6.85—7 |
| 5 | Fusing point (DEG C) | > 1150 |
| 6 | Expansion rate (1/ DEG C) | < 1.3 × 10-5 |
It has the beneficial effect that:
(1) resistance method efficiently drops in the substation, by substation location region be embedded to charcoal bed, and use high-silicon chromium iron stick as
The leading body of charcoal bed electrode, cooperation are poured into the friction reducer in metal bucket or metal trough, can effectively be reduced between grounding body and soil
Resistivity, and improve and keep the electric conductivity of substation location regional soil, to keep ground resistance up to standard, improve drop resistance
Effect improves Transformer Substation Lightning Protection performance, effective protection substation, transformer station personnel and equipment.
(2) resistance method efficiently drops in the substation, by the undulated design on charcoal bed surface, and with carbon containing with 95% or more
Petroleum calcined coke layering is laid with, and can effectively improve the compression strength and electric conductivity of charcoal bed, prevents charcoal bed when backfill from rupturing,
The difficulty for reducing substation's drop resistance construction effectively reduces the adverse effect in place and ground confrontation worker construction, solves artificial earthing
It is influenced by place and geological conditions, ground resistance has situation not up to standard often, hinders unstable, lightning protection for the drop of substation
Property is poor, for power station, transformer station personnel and equipment there are problems that it is larger endanger, by the new process of exothermic weld to ground connection
Net steel and the junction of high-silicon chromium iron stick are welded, and are sealed anti-corrosion to Exothermic welded connections using epoxy resin,
So that charcoal bed, high-silicon chromium iron stick and grounded screen steel is preferably adapted to the soil environment of strong acid and strong base, is not easy to be corroded, it is effective to protect
Permanently effective good conductive ability has been demonstrate,proved, the bond stress of high-silicon chromium iron stick Yu charcoal bed has been increased, reduces contact resistance, into one
Step improves the substation and efficiently drops resistance method to the stability of substation's drop resistance.
(3) resistance method efficiently drops in the substation, by digging a truncated cone-shaped or length on the soil layer in substation location region
After rectangular dell, a zinc-plated truncated cone-shaped metal bucket or hot galvanizing rectangle metal trough are put into the bottom in hole, prevent substation location
The soil layer in region is directly contacted with charcoal bed, corrosion charcoal bed, high-silicon chromium iron stick and grounded screen steel, by the top of metal bucket or metal trough
Portion is paved with weathering rock ballast bed course, smooth location, completely rams one time, levelling, spreads geotextiles again, rolls eight times with vibrating roller, effectively
It prevents drop resistance equipment from collapsing or damaging, can be further improved the stability that the drop resistance of resistance method efficiently drops in the substation, avoid dropping
Equipment damage is hindered, Transformer Substation Lightning Protection effect is caused to be deteriorated.
Specific embodiment
Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
The present invention provides a kind of technical solution: resistance method efficiently drops in a kind of substation, comprising the following steps: step 1: surveying
Soil is surveyed, soil model is established
Survey crew are using Soil K+adsorption instrument to soil resistivity, frost penetration and the soil layering in substation location region
Situation is surveyed, and establishes soil model according to the transversely layered data of the soil of exploration and longitudinal layered data, in substation
Earthing or grounding means in design station in the region of site carries out security verification to the earthing or grounding means of design, obtains check results, save school
It is qualified as a result, simultaneously the best check results in constituency draw construction drawing to test, and construction personnel carries out site operation according to construction drawing,
Survey crew, to the soil resistivity in substation location region, select the center in substation location region using Soil K+adsorption instrument
Point, setting measure substation location apart from the symmetrical two groups of measuring electrodes of survey child's central point, using at least two groups measuring electrode
Two groups of measuring electrode exchange electrodes are corrected measurement and obtain correction substation location regional soil electricity by regional soil resistivity
Resistance rate, when the error of substation location regional soil resistivity and correction substation location regional soil resistivity is less than preset value
When, then the substation location regional soil resistivity average value repeatedly measured is determined as substation location regional soil resistance
Rate；
Step 2: digging pit and burying the arrangement in hole
One is dug on the soil layer in substation location region according to vertical-type or the requirement of horizontal type construction method according to construction drawing
After a truncated cone-shaped or rectangle dell, a zinc-plated truncated cone-shaped metal bucket or hot galvanizing rectangle metal trough are put into the bottom in hole, iron
Bucket is put into truncated cone-shaped heatable adobe sleeping platform, and metal trough is put into rectangle trench；
Step 3: embedded charcoal bed
It is put into charcoal bed ground connection in the bottom of metal bucket or metal trough, the leading body using high-silicon chromium iron stick as charcoal bed electrode, using YJV
High-silicon chromium iron stick is led on grounded screen steel by insulating sheath cable, by the new process of exothermic weld to grounded screen steel and height
The junction of silicochromium iron staff is welded, and is sealed anti-corrosion to Exothermic welded connections using epoxy resin, uses friction reducer
The bottom that connecting line on metal bucket or metal trough is welded on high-silicon chromium iron stick is drawn on galvanized sheet, high-silicon chromium iron stick top lead-out wire
Weld together with major network zinc-coated flat steel sheet, then pours into the friction reducer being stirred in advance in metal bucket or metal trough, friction reducer is put into
Number should be lower than 30 millimeters of metal bucket or metal trough upper end, charcoal bed is layered with 95% or more carbon containing petroleum calcined coke and is laid with, charcoal bed
Surface uses undulated design, and charcoal bed is located at -0.8 meter~-1.2 meters, and the length of high-silicon chromium iron stick is 2.4 meters~2.5m meters, is connect
Earth mat steel use 60*8 zinc-coated flat steel sheet, and the area of section of band steel is not less than 300 square millimeters, and thickness is flat not less than 6 millimeters
Steel need to will connect before being welded by the new process of exothermic weld to the lead junction of grounded screen steel and high-silicon chromium iron stick
Earth mat steel are cleaned out, and when welding first solder joint, welding powder dosage should be slightly less than grounded screen steel and high-silicon chromium iron
The lead connector of stick makes grounded screen steel and mold coincide good, welding fluid is avoided to flow out using C-type clamp tool；
Step 4: pit slot backfills
Into the metal bucket or metal trough for buried charcoal bed, the fine clay for setting and being stirred in advance is filled out in layering, and every layer of backfill thickness is about 300
Millimeter or so, until the upper end of metal bucket or metal trough is completely covered in fine clay, then in fine clay surface uniform sprinkling；
Step 5: charcoal bed buries the compacting in hole
Weathering is paved at the gap of truncated cone-shaped metal bucket or hot galvanizing rectangle metal trough and dell and at the top of metal bucket or metal trough
Rock ballast bed course, smooth location completely ram one time, levelling, spread geotextiles again, are rolled eight times with vibrating roller.
When prepared by high-silicon chromium iron stick, implement casting according to the following ratio.
Component list
| Serial number | Title | Required value |
| 1 | Silicon | 14.25~15.25% |
| 2 | Manganese | ≤0.5% |
| 3 | Carbon | <1.4% |
| 4 | Phosphorus (P) | <0.25% |
| 5 | Sulphur (S) | <0.1% |
| 6 | Chromium | 4%~5% |
| 7 | Molybdenum | ≤0.2% |
| 8 | Copper | ≤0.5% |
| 9 | Iron | Surplus |
Technical indicator meets following require
Physical characteristic
| Serial number | Title | Index |
| 1 | Resistivity (Ω-cm) at 20 DEG C | < 0.5 |
| 2 | Compression strength (MPa) | > 690 |
| 3 | Tensile strength (MPa) | > 103 |
| 4 | Specific gravity (g/cm3) | 6.85—7 |
| 5 | Fusing point (DEG C) | > 1150 |
| 6 | Expansion rate (1/ DEG C) | < 1.3 × 10-5 |
Operating method: resistance method efficiently drops in the substation, by the soil in exploration substation location region, establishes soil mould
Type facilitates construction personnel to construct, and selects suitable friction reducer and charcoal bed size according to the resistivity of exploration and frost penetration, leads to
The arrangement for digging pit and burying hole is crossed, is put into after metal bucket or metal trough and is burying charcoal bed ground connection in the bottom of metal bucket or metal trough again, using height
High-silicon chromium iron stick is led on grounded screen steel by leading body of the silicochromium iron staff as charcoal bed electrode using YJV insulating sheath cable,
Then into the metal bucket or metal trough for buried charcoal bed, the fine clay for setting and being stirred in advance is filled out in layering, is finally buried hole to charcoal bed and is rammed
Real, effective solution ground resistance has situation not up to standard often, and unstable for the drop resistance of substation, resistance reducing effect is poor,
Cause Transformer Substation Lightning Protection poor, there are problems that larger endanger for substation, transformer station personnel and equipment.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. resistance method efficiently drops in a kind of substation, it is characterised in that: the following steps are included:
Step 1: exploration soil, establishes soil model
Survey crew are using Soil K+adsorption instrument to soil resistivity, frost penetration and the soil layering in substation location region
Situation is surveyed, and establishes soil model according to the transversely layered data of the soil of exploration and longitudinal layered data, in substation
Earthing or grounding means in design station in the region of site carries out security verification to the earthing or grounding means of design, obtains check results, save school
It is qualified as a result, simultaneously the best check results in constituency draw construction drawing to test, and construction personnel carries out site operation according to construction drawing；
Step 2: digging pit and burying the arrangement in hole
One is dug on the soil layer in substation location region according to vertical-type or the requirement of horizontal type construction method according to construction drawing
After a truncated cone-shaped or rectangle dell, a zinc-plated truncated cone-shaped metal bucket or hot galvanizing rectangle metal trough are put into the bottom in hole, iron
Bucket is put into truncated cone-shaped heatable adobe sleeping platform, and metal trough is put into rectangle trench；
Step 3: embedded charcoal bed
It is put into charcoal bed ground connection in the bottom of metal bucket or metal trough, the leading body using high-silicon chromium iron stick as charcoal bed electrode, using YJV
High-silicon chromium iron stick is led on grounded screen steel by insulating sheath cable, by the new process of exothermic weld to grounded screen steel and height
The junction of silicochromium iron staff is welded, and is sealed anti-corrosion to Exothermic welded connections using epoxy resin, uses friction reducer
The bottom that connecting line on metal bucket or metal trough is welded on high-silicon chromium iron stick is drawn on galvanized sheet, high-silicon chromium iron stick top lead-out wire
Weld together with major network zinc-coated flat steel sheet, then pours into the friction reducer being stirred in advance in metal bucket or metal trough, friction reducer is put into
Number should be lower than 30 millimeters of metal bucket or metal trough upper end；
Step 4: pit slot backfills
Into the metal bucket or metal trough for buried charcoal bed, the fine clay for setting and being stirred in advance is filled out in layering, and every layer of backfill thickness is about 300
Millimeter or so, until the upper end of metal bucket or metal trough is completely covered in fine clay, then in fine clay surface uniform sprinkling；
Step 5: charcoal bed buries the compacting in hole
Weathering is paved at the gap of truncated cone-shaped metal bucket or hot galvanizing rectangle metal trough and dell and at the top of metal bucket or metal trough
Rock ballast bed course, smooth location completely ram one time, levelling, spread geotextiles again, are rolled eight times with vibrating roller.
2. resistance method efficiently drops in a kind of substation according to claim 1, it is characterised in that: the charcoal bed is with 95% or more
Carbon containing petroleum calcined coke, which is layered, to be laid with, and charcoal bed surface uses undulated design, and charcoal bed is located at -0.8 meter~-1.2 meters, high silicon
The length of ferrochrome stick is 2.4 meters~2.5m meters, and grounded screen steel use 60*8 zinc-coated flat steel sheet, and the area of section of band steel is greater than 300
Square millimeter, thickness are greater than 6 millimeters of band steel.
3. resistance method efficiently drops in a kind of substation according to claim 1, it is characterised in that: described by exothermic weld
Before new process welds the lead junction of grounded screen steel and high-silicon chromium iron stick, grounded screen steel need to be cleaned out,
And when welding first solder joint, welding powder dosage should be slightly less than the lead connector of grounded screen steel Yu high-silicon chromium iron stick, adopt
So that grounded screen steel and mold is coincide with C-type clamp tool good, welding fluid is avoided to flow out.
4. resistance method efficiently drops in a kind of substation according to claim 1, it is characterised in that: the survey crew use soil
Earth detector selectes the central point in substation location region, setting distance should to the soil resistivity in substation location region
The symmetrical two groups of measuring electrodes of virgin central point are surveyed, measure the substation location region soil using at least two groups measuring electrode
Two groups of measuring electrodes exchange electrode is corrected measurement and obtains correction substation location regional soil resistance by earth resistivity
Rate is preset when the error of the substation location regional soil resistivity and correction substation location regional soil resistivity is less than
When value, then the substation location regional soil resistivity average value repeatedly measured is determined as substation location regional soil
Resistivity.
5. resistance method efficiently drops in a kind of substation according to claim 1, it is characterised in that: the high-silicon chromium iron stick preparation
When, implement casting according to the following ratio.
6. component list
Technical indicator meets following require
Physical characteristic
。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811167762.5A CN109361080A (en) | 2018-10-08 | 2018-10-08 | Resistance method efficiently drops in a kind of substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811167762.5A CN109361080A (en) | 2018-10-08 | 2018-10-08 | Resistance method efficiently drops in a kind of substation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109361080A true CN109361080A (en) | 2019-02-19 |
Family
ID=65348504
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811167762.5A Pending CN109361080A (en) | 2018-10-08 | 2018-10-08 | Resistance method efficiently drops in a kind of substation |
Country Status (1)
| Country | Link |
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| CN (1) | CN109361080A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112147463A (en) * | 2020-09-25 | 2020-12-29 | 云南电网有限责任公司红河供电局 | Method and device for reducing grounding impedance of transformer substation grounding grid by additionally arranging capacitor module |
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| CN104901030A (en) * | 2015-06-09 | 2015-09-09 | 河北省电力勘测设计研究院 | Construction method of resistance reduction and grounding device of transformer station |
| CN204720575U (en) * | 2015-07-02 | 2015-10-21 | 云南宇恬防雷材料有限公司 | DC earthing electrode |
| CN108051647A (en) * | 2017-12-01 | 2018-05-18 | 湖北省电力勘测设计院有限公司 | A kind of method of wind power plant soil resistivity correction measurement |
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| CN101067184A (en) * | 2007-06-06 | 2007-11-07 | 任国登 | High-silicon-chrome-molybdenum-copper cast iron |
| CN102394389A (en) * | 2011-06-17 | 2012-03-28 | 国网电力科学研究院武汉南瑞有限责任公司 | High ferrochrome silicon electrode for direct-current grounding electrode |
| CN102856671A (en) * | 2012-04-25 | 2013-01-02 | 辽宁省电力有限公司丹东供电公司 | Environment-friendly leak-proof moisturizing grounding device and construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112147463A (en) * | 2020-09-25 | 2020-12-29 | 云南电网有限责任公司红河供电局 | Method and device for reducing grounding impedance of transformer substation grounding grid by additionally arranging capacitor module |
| CN112147463B (en) * | 2020-09-25 | 2022-11-04 | 云南电网有限责任公司红河供电局 | Method and device for reducing grounding impedance of transformer substation grounding grid by additionally arranging capacitor module |
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Application publication date: 20190219 |