Buried pipeline cathode protection method and system

A technology of buried pipeline and protection method, applied in the field of buried pipeline protection, can solve problems such as low accuracy and lack of standardized operation procedures

Active Publication Date: 2016-07-20
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a cathodic protection method and cathodic protection system for buried pipelines, which are used to solve the problems of low accuracy and lack of standardized operating procedures for cathodic protection of buried pipelines based on experience

Method used

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  • Buried pipeline cathode protection method and system
  • Buried pipeline cathode protection method and system
  • Buried pipeline cathode protection method and system

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Embodiment 1

[0062] The buried pipeline is a hollow buried cylindrical conductor covered with an insulating anti-corrosion layer 5. After the buried pipeline is divided into several small sections, the buried pipeline is equivalent to a hollow buried cylindrical conductor divided into several small sections; The anode protection device (sacrificial anode) can be equivalent to a voltage source and several sections of conductors; the forced drainage device can be equivalent to a current source and several sections of conductors, and the anode bed in the forced drainage method can be regarded as buried The ground cylindrical conductor; the ground electrode is a conductor or a combination of several conductors that are buried in the ground to be connected to the ground, and can also be regarded as a buried cylindrical conductor; because the potential of any point in the soil around the buried conductor is It is jointly generated by the leakage current of all conductors; therefore, when calculat...

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Abstract

The invention discloses a buried pipeline cathode protection method and system, relates to the technical field of buried pipeline protection, and aims at solving the problems that a method for conducting cathode protection on a buried pipeline according to the experience is low in accuracy, and standard operation procedures are lacked. The buried pipeline cathode protection method comprises the steps that the ground potential difference of an initial pipe and the ground potential differences from a first pipe to an nth pipe are obtained; the ground potential difference of a target pipe and a corresponding installation parameter vector are obtained; then, the ground potential difference of the target pipe and the allowed maximum pipe ground potential of the buried pipeline are compared, and when conditions are met, the obtained installation parameter vector corresponding to the ground potential difference of the target pipe is a target result; or otherwise, the number of anodic sacrifice protection devices and the number of forced drainage devices are adjusted till the conditions are met. The buried pipeline cathode protection method is used for optimal arrangement of buried pipeline cathode protection devices.

Description

technical field [0001] The invention relates to the technical field of buried pipeline protection, in particular to a buried pipeline cathodic protection method and a cathodic protection system. Background technique [0002] With the continuous development of the power system, there are more and more long-distance and large-capacity power transmission projects. For such power transmission projects, in the prior art, power transmission is generally realized through a high-voltage direct current transmission system. This HVDC grounded power transmission system will adopt a single-pole ground operation mode at the initial stage of operation, annual maintenance and troubleshooting, and when this mode of operation is adopted, the DC current injected into or extracted from the ground by the ground electrode can be as high as several thousand Ampere; therefore, in this case, when the DC ground electrode is relatively close to the buried pipeline used to transport oil and gas resour...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F13/02
CPCC23F13/02C23F2213/32
Inventor 廖永力张波孟晓波曾嵘邹林李锐海何金良曹方圆陈晓张巍吴新桥张贵峰张曦龚博朱烨
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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