CN107937921A - A kind of means of defence for preventing direct current earth current from being influenced on Metal pipeline corrosion - Google Patents

A kind of means of defence for preventing direct current earth current from being influenced on Metal pipeline corrosion Download PDF

Info

Publication number
CN107937921A
CN107937921A CN201711204930.9A CN201711204930A CN107937921A CN 107937921 A CN107937921 A CN 107937921A CN 201711204930 A CN201711204930 A CN 201711204930A CN 107937921 A CN107937921 A CN 107937921A
Authority
CN
China
Prior art keywords
protective layer
numerical value
pipeline
high resistant
resistant protective
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.)
Granted
Application number
CN201711204930.9A
Other languages
Chinese (zh)
Other versions
CN107937921B (en
Inventor
胡蕴斌
肖芳磊
张竞涵
高毓群
谷裕
韩永霞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
South China University of Technology SCUT
Guangzhou Bureau of Extra High Voltage Power Transmission Co
Original Assignee
South China University of Technology SCUT
Guangzhou Bureau of Extra High Voltage Power Transmission Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by South China University of Technology SCUT, Guangzhou Bureau of Extra High Voltage Power Transmission Co filed Critical South China University of Technology SCUT
Priority to CN201711204930.9A priority Critical patent/CN107937921B/en
Publication of CN107937921A publication Critical patent/CN107937921A/en
Application granted granted Critical
Publication of CN107937921B publication Critical patent/CN107937921B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/20—Conducting electric current to electrodes
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/04—Controlling or regulating desired parameters
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F2213/00—Aspects of inhibiting corrosion of metals by anodic or cathodic protection
    • C23F2213/10—Controlling or regulating parameters
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F2213/00—Aspects of inhibiting corrosion of metals by anodic or cathodic protection
    • C23F2213/30—Anodic or cathodic protection specially adapted for a specific object
    • C23F2213/32—Pipes

Abstract

The invention discloses a kind of means of defence for preventing electric system earth current from being influenced on metallic conduit.The method comprises the following steps：According to Practical Project parameter model, the numerical value of simulation analysis leakage current density of pipeline when not increasing resistance protective layer；Determined to need the multiple for limiting corrosion current according to corrosive pipeline size of current；It is then determined that the size of current limited is needed after increasing resistance layer；The numerical value that should be reduced to of leakage current density after laying high resistant protective layer is calculated；Simulation calculation adds the numerical value of leakage current density on pipeline after high resistant protective layer；Whether the numerical value that comparing the numerical value of Leakage Current density on pipeline after the addition high resistant protective layer being calculated should reduce with the leakage current density calculated approaches, and the resistivity and thickness of high resistant protective layer are adjusted according to comparative result.The method has stronger applicability, is avoided that most pipelines are influenced by electric system earth current, is provided simultaneously with the advantages that later maintenance is simple.

Description

A kind of means of defence for preventing direct current earth current from being influenced on Metal pipeline corrosion
Technical field
The present invention relates to the field that HVDC transmission system influences underground metal piping system, more particularly to one kind are anti- The means of defence that only direct current earth current influences Metal pipeline corrosion.
Background technology
With the continuous development of China's power grid, D.C. high voltage transmission because of its advantage on long-distance and large-capacity power transmission, Have been more and more widely used.DC transmission engineering built at present is nearly all the side using bipolar both ends neutral ground Formula, this mode allow to run using monopolar ground return.Under the monopolar ground return method of operation, straight-flow system has very big DC current flow into the earth, heavy corrosion, threat tube normal operation can be produced to the metal oil-gas pipeline in nearby.
At present, for influence of the earth current to metallic conduit, mainly there are three kinds of means of defences：1) Jona's method.It is logical Cross reduces pipeline potential difference by duct segments, reduces the electric current for flowing through pipeline so that the corrosion for weakening pipeline.The method can not only Weaken the corrosion of pipeline, moreover it is possible to reduce pipe to soil potential, but abnormal rise situation, and insulating joint price occurs in respective location Height, O＆M input is big, other safeguard procedures need to be coordinated to be used together.2) electric drainage by grounding method.Using the principle of sacrificial anode, use The metal that the activity such as zinc, magnesium are better than iron is corroded instead of steel pipe.The optional pipeline all insulation of earthing mode, distal end ground connection, connect entirely Three kinds of ground, wherein being grounded entirely, the effect for influencing to suppress caused by earth current is best, but can shorten the cathode of pipeline in itself and protect The protection domain of equipment is protected, can also increase the stray electrical current of pipeline absorption.3) cathode current method is forced.This method is actually Cathode protection method, forces to make sense of current flow ipe, is flowed out from impressed current anode by the DC power supply applied outside.This method pair Cathodic protection plant capacity is more demanding, is generally mated other pipeline protection measures use.Each measure is needed because its applicability is different Selected according to different condition, it is complex, it is proposed that a kind of stronger method of versatility protects pipeline.
The content of the invention
In order to solve the above problem present in existing metallic conduit guard technology, the present invention, which provides one kind, prevents power train The means of defence that system earth current influences metallic conduit, this method hinder D.C. high voltage transmission by embedded high resistant protective layer The earth current of system flows to metallic conduit surface, so that effect of the metallic conduit from earth current electrochemical corrosion is protected, It is versatile.
The present invention solves above-mentioned technical problem using following technical scheme：One kind prevents electric system earth current to gold The means of defence that metal conduit influences, includes the following steps：
S1, according to direct current transportation earthed system parameter in Practical Project, earthing pole surrounding conduit parameter, earthing pole around Soil model etc., establishes earthing pole pipe-line system model, and the leakage current of simulation analysis pipeline when not increasing resistance protective layer is close The numerical value of degree；
S2, according to the corrosion condition in Practical Project on pipeline, determine the corrosion current size on pipeline, it is rotten with reference to electric current The related standard limit of pipeline is lost, determines to need the multiple for limiting corrosion current；
S3, obtained from step S1 and step S2 without high resistant protective layer when pipeline leakage current density and need to reduce Corrosion current numerical value, the numerical value that should be reduced to of leakage current density after laying high resistant protective layer is calculated；
High resistant protective layer is added on S4, the pipeline in the earthing pole pipe-line system model, high resistant is determined according to estimation The resistivity and its thickness of protective layer, simulation calculation add the numerical value of leakage current density on pipeline after high resistant protective layer；
S5, numerical value and step by Leakage Current density on pipeline after the addition high resistant protective layer being calculated in step S4 The numerical value that leakage current density should reduce in S3 is contrasted, if both are closer to, the high resistant protective layer that will currently select Resistivity and thickness parameter as final argument；If the numerical value that step S4 is calculated is more than the numerical value that step S3 is calculated, Increase the resistivity and thickness of high resistant protective layer, repeat step S4；If the numerical value that step S4 is calculated is counted much smaller than step S3 The numerical value of calculation, then reduce the resistivity and thickness of high resistant protective layer, repeat step S4.
Preferably, the earthing pole pipe-line system model is established in CDEGS.
Preferably, the resistivity of the high resistant protective layer and its thickness are obtained by CDEGS simulation calculations.
As can be known from the above technical solutions, the present invention is tried to achieve when not adding protective layer first according to Practical Project parameter model Leakage current density；Determine that high resistant protective layer protects multiple then according to actual corrosion current size；It is then determined that increase resistance layer The size of current limited is needed afterwards；The resistivity and thickness parameter of high resistant protective layer are obtained further according to simulation calculation；Compare calculating The numerical value of Leakage Current density and the leakage current density calculated should reduce on pipeline after obtained addition high resistant protective layer Whether numerical value approaches, and the resistivity and thickness of high resistant protective layer are adjusted according to comparative result..Compared with prior art, it is of the invention Have the following advantages that and beneficial effect：
1st, there is stronger applicability, be avoided that most pipelines are influenced by electric system earth current, have at the same time The advantages such as standby later maintenance management is convenient, maintenance cost is low.
2nd, versatility is stronger, and corruption of the direct current earth current to metallic conduit can be effectively reduced under different soil Erosion.
Brief description of the drawings
Fig. 1 is D. C. Electric transmission earthed pole and pipe-line system illustraton of model；
Fig. 2 is the structure diagram of high resistant protective layer protection metallic conduit.
Embodiment
With reference to embodiment and attached drawing, patent of the present invention is further described in detail, but embodiments of the present invention Not limited to this.
The present invention prevents the means of defence that electric system earth current influences metallic conduit, includes the following steps：
S1, according to direct current transportation earthed system parameter in Practical Project, earthing pole surrounding conduit parameter, earthing pole around Soil model etc., establishes earthing pole pipe-line system model in CDEGS, and simulation analysis pipeline when not increasing resistance protective layer is let out The numerical value of leakage current density.
In the present embodiment, according to ichthyosauru ridge earthing pole and the second west to east gas pipeline project pipe parameter, direct current transportation ground connection is established Pole and pipe-line system model are as shown in Figure 1.Wherein, ichthyosauru ridge ground connection extremely 940 polar rings of Φ and 700 polar rings of Φ is together to form Double annulus earthing poles, inner and outer ring buried depth are respectively 3.5m and 4m, and maximum allowable earth current is 3470.5A.Pipeline is by two sections points The part composition of not long 6km and 14.1km, pipeline and the nearest distance of earthing pole are about 9km.Soil is multilayer extracting, point Layer soil resistivity is as shown in table 1：
1 stratified soil resistivity of table
It is 2.9mA/m that simulation calculation, which obtains pipeline maximum leakage current density,2。
S2, according to the corrosion condition in Practical Project on pipeline, determine the corrosion current size on pipeline, it is rotten with reference to electric current The related standard limit of pipeline is lost, determines to need the multiple for limiting corrosion current.
The present embodiment is according to the typical case of pipeline anticorrosion coating notch, it is assumed that there are a diameter d is lacking for 2cm on pipeline Mouthful, indentation, there pipeline potential shift Δ U takes threshold limit value 100mV, then the corrosion electric current density J of the indentation, there can be counted as the following formula Calculate：
It is 0.18A/m that corrosion electric current density J, which is calculated,2, according to China's power industry relevant criterion《D.C. high voltage transmission The earth returns to runtime designing technique regulation》(DL/T5224-2014) regulation, leakage current should be less than 0.01A/m in2, because Leakage current need to be reduced to original 1/18 by this, it is met standard limit.
S3, obtained from step S1 and step S2 without high resistant protective layer when pipeline leakage current density and need to reduce Corrosion current numerical value, the numerical value that should be reduced to of leakage current density after laying high resistant protective layer is calculated.
According to the data calculated in step S1 and step S2, in order to which corrosion current is reduced in the range of code, need to set High resistant protective layer, makes the leakage current density on pipeline be less than 0.16mA/m2。
High resistant protective layer is added on S4, the pipeline in CDEGS earthing pole pipe-line system models, high resistant is determined according to estimation The resistivity and its thickness of protective layer, simulation calculation add the numerical value of leakage current density on pipeline after high resistant protective layer.
It is 20k Ω m to take high resistant protection layer resistivity, and thickness 1m, imitates the leakage current density on pipeline again True to calculate, it is 0.31mA/m that maximum leakage current density, which is calculated,2。
The pipeline configuration of high resistant protective layer is additionally arranged as shown in Fig. 2, high resistant protective layer 2 is coated in 1 outer surface of metallic conduit, Each arrow 3 is current direction.
S5, numerical value and step by Leakage Current density on pipeline after the addition high resistant protective layer being calculated in step S4 The numerical value that leakage current density should reduce in S3 is contrasted, if both are closer to, the high resistant protective layer that will currently select Resistivity and thickness parameter as final argument；If the numerical value that step S4 is calculated is more than the numerical value that step S3 is calculated, Increase the resistivity and thickness of high resistant protective layer, repeat step S4；If the numerical value that step S4 is calculated is counted much smaller than step S3 The numerical value of calculation, then reduce the resistivity and thickness of high resistant protective layer, repeat step S4.
In the present embodiment, since maximum leakage current density is still unsatisfactory for requiring after having added the high resistant protective layer, by high resistant Protection layer resistivity increases to 41k Ω m, repeat step S4, and maximum leakage current density on pipeline is calculated and is reduced to 0.16mA/m2, therefore it is 41k Ω m, thickness 1m to select high resistant protection layer resistivity.
Above-described embodiment is the preferable embodiment of the present invention, but embodiments of the present invention and from above-described embodiment Limitation, other any Spirit Essences without departing from the present invention with made under principle change, modification, replacement, combine, simplification, Equivalent substitute mode is should be, is included within protection scope of the present invention.

Claims (3)

1. a kind of means of defence for preventing electric system earth current from being influenced on metallic conduit, it is characterised in that including following step Suddenly：
S1, according to the soil around direct current transportation earthed system parameter in Practical Project, earthing pole surrounding conduit parameter, earthing pole Model etc., establishes earthing pole pipe-line system model, simulation analysis leakage current density of pipeline when not increasing resistance protective layer Numerical value；
S2, according to the corrosion condition in Practical Project on pipeline, the corrosion current size on pipeline is determined, with reference to electrolytic corrosion pipe The related standard limit in road, determines to need the multiple for limiting corrosion current；
S3, obtained from step S1 and step S2 without high resistant protective layer when pipeline leakage current density and the corruption that need to reduce Current values are lost, the numerical value that should be reduced to of leakage current density after laying high resistant protective layer is calculated；
High resistant protective layer is added on S4, the pipeline in the earthing pole pipe-line system model, high resistant protection is determined according to estimation The resistivity and its thickness of layer, simulation calculation add the numerical value of leakage current density on pipeline after high resistant protective layer；
S5, add what is be calculated in step S4 after high resistant protective layer on pipeline in the numerical value and step S3 of Leakage Current density The numerical value that leakage current density should reduce is contrasted, if both are closer to, by the electricity of the high resistant protective layer currently selected Resistance rate and thickness parameter are as final argument；If the numerical value that step S4 is calculated is more than the numerical value that step S3 is calculated, increase The resistivity and thickness of high resistant protective layer, repeat step S4；What if the numerical value that step S4 is calculated was calculated much smaller than step S3 Numerical value, then reduce the resistivity and thickness of high resistant protective layer, repeat step S4.
2. the means of defence according to claim 1 for preventing electric system earth current from being influenced on metallic conduit, its feature It is, the earthing pole pipe-line system model is established in CDEGS.
3. the means of defence according to claim 1 for preventing electric system earth current from being influenced on metallic conduit, its feature It is, the resistivity and its thickness of the high resistant protective layer are obtained by CDEGS simulation calculations.
CN201711204930.9A 2017-11-27 2017-11-27 A kind of means of defence for preventing direct current earth current from influencing on Metal pipeline corrosion Active CN107937921B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711204930.9A CN107937921B (en) 2017-11-27 2017-11-27 A kind of means of defence for preventing direct current earth current from influencing on Metal pipeline corrosion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711204930.9A CN107937921B (en) 2017-11-27 2017-11-27 A kind of means of defence for preventing direct current earth current from influencing on Metal pipeline corrosion

Publications (2)

Publication Number Publication Date
CN107937921A true CN107937921A (en) 2018-04-20
CN107937921B CN107937921B (en) 2019-08-30

Family

ID=61949982

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711204930.9A Active CN107937921B (en) 2017-11-27 2017-11-27 A kind of means of defence for preventing direct current earth current from influencing on Metal pipeline corrosion

Country Status (1)

Country Link
CN (1) CN107937921B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114606500A (en) * 2020-12-09 2022-06-10 中国石油天然气集团有限公司 Method, device and equipment for determining direct current stray current protection scheme of buried pipeline

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103075607A (en) * 2011-10-25 2013-05-01 北京安科管道工程科技有限公司 Pipeline component and method for protecting cathode of same
CN103899883A (en) * 2014-04-03 2014-07-02 中国石油集团工程设计有限责任公司 Oil and gas pipeline comprehensive protection method for high-voltage direct-current grounding electrode interference
CN105780014A (en) * 2016-04-29 2016-07-20 南方电网科学研究院有限责任公司 Buried pipeline cathode protection method and system
CN105805456A (en) * 2016-04-27 2016-07-27 南方电网科学研究院有限责任公司 Fuel conveying pipeline, construction method of fuel conveying pipeline and fuel conveying system
CN106676541A (en) * 2017-01-09 2017-05-17 国网浙江省电力公司电力科学研究院 Stray current corrosion protection method for metal pipeline

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103075607A (en) * 2011-10-25 2013-05-01 北京安科管道工程科技有限公司 Pipeline component and method for protecting cathode of same
CN103899883A (en) * 2014-04-03 2014-07-02 中国石油集团工程设计有限责任公司 Oil and gas pipeline comprehensive protection method for high-voltage direct-current grounding electrode interference
CN105805456A (en) * 2016-04-27 2016-07-27 南方电网科学研究院有限责任公司 Fuel conveying pipeline, construction method of fuel conveying pipeline and fuel conveying system
CN105780014A (en) * 2016-04-29 2016-07-20 南方电网科学研究院有限责任公司 Buried pipeline cathode protection method and system
CN106676541A (en) * 2017-01-09 2017-05-17 国网浙江省电力公司电力科学研究院 Stray current corrosion protection method for metal pipeline

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
曹方圆: "直流接地极对埋地金属管道影响的电路模型及应用", 《电网技术》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114606500A (en) * 2020-12-09 2022-06-10 中国石油天然气集团有限公司 Method, device and equipment for determining direct current stray current protection scheme of buried pipeline
CN114606500B (en) * 2020-12-09 2024-03-01 中国石油天然气集团有限公司 Buried pipeline direct current stray current protection scheme determination method, device and equipment

Also Published As

Publication number Publication date
CN107937921B (en) 2019-08-30

Similar Documents

Publication Publication Date Title
CN109668820B (en) Comprehensive evaluation method for corrosion risk outside buried pipeline
CN105780014B (en) A kind of buried pipeline cathode protection method and cathodic protection system
CN107657072A (en) Computational methods and device of the buried metal pipeline by DC influence
Hanson et al. AC corrosion on a pipeline located in a HVAC utility corridor
CN104674228A (en) Detection method for cathode protection of directionally drilled and crossed pipeline
CN105975768B (en) A kind of method and device of arrangement buried pipeline graded insulation
CN107142482B (en) The determination and means of defence that shape high voltage DC earthing pole interferes buried metal works
CN101696758B (en) Corrosion control method of trenchless construction large diameter pipeline
CN107893231B (en) The means of defence of limitation direct current grounding pole corrosion buried metal pipeline and buried system
CN103618154A (en) Anti-corrosion grounding device for electric transmission line tower and manufacturing method thereof
CN107937921B (en) A kind of means of defence for preventing direct current earth current from influencing on Metal pipeline corrosion
CN107245720B (en) Gas station region cathodic protection Optimization Design based on the Big Dipper
CN106021866B (en) The unified calculation method that direct current grounding pole influences AC network and oil-gas pipeline
CN108595850A (en) The computational methods of parallel pipeline cathodic protection length under a kind of impressed current system
CN114606500B (en) Buried pipeline direct current stray current protection scheme determination method, device and equipment
Ahmed et al. Designing in-house cathodic protection system to assess the long-term integrity of natural gas pipelines
CN116029244A (en) Buried metal pipeline equivalent circuit model under influence of direct current ground current
CN104483578B (en) It is a kind of to assess the method that D.C. magnetic biasing influences on power system grounded screen
Lervik et al. Optimizing electrical heating system of subsea oil production pipelines
CN111945170A (en) Cathodic protection system based on oil and gas pipeline
Shukla et al. A Simplified Model to Simulate Electrolytic Coupling in Cased Pipeline Crossings
Kiselev et al. Main trends in increasing technical and economic efficiency of underground power pipelines cathodic protection
CN112287589A (en) Finite element positioning method for buried steel pipeline anticorrosive coating damage point
Kiselev et al. Optimization of the amount of coke filling usage in cathodic protection systems for an anode grounding model in the form of a hemisphere
Peabody et al. The effects of high-voltage AC transmission lines on buried pipelines

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant