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Method and device for calculating direct-current interference on buried metal pipeline

A technology of direct current interference and metal pipes, applied in the field of electric power, can solve problems such as large calculation errors, and achieve accurate evaluation, simple implementation, and accurate calculation

Inactive Publication Date: 2018-02-02
CHINA ELECTRIC POWER RES INST +3
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, the present invention proposes a calculation method and device for direct current interference of buried metal pipelines, aiming to solve the problem of relatively large calculation errors in the existing calculation method for direct current interference of pipelines

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  • Method and device for calculating direct-current interference on buried metal pipeline
  • Method and device for calculating direct-current interference on buried metal pipeline
  • Method and device for calculating direct-current interference on buried metal pipeline

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Embodiment Construction

[0032]Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0033] Method example:

[0034] see figure 1 , figure 1 It is a schematic flowchart of a calculation method for a buried metal pipeline subjected to direct ...

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Abstract

The invention provides a method and a device for calculating direct-current interference on a buried metal pipeline. The method comprises the following steps: acquiring a first polarization curve of acoated pipeline; segmentally and linearly fitting the first polarization curve to obtain coating surface resistivity, a metal working potential and a fitting polarization potential interval of each segment of fitting straight line; segmenting the coated pipeline, and assigning a value to each pipeline segment respectively in order to calculate a polarization potential at each position of the coated pipeline; and performing an iterative calculation on the polarization potential of the coated pipeline till a difference value between two adjacent calculations of the polarization potential at each position of the coated pipeline is within a threshold when the polarization potential of at one position is outside the fitting polarization potential interval, and determining the polarization potential at each position on the coated pipeline. Through adoption of the calculation method provided by the invention, a calculation result is closer to an actual situation under the consideration of the calculation of the polarization effect, so that the accuracy of a calculated result is further increased, and the likelihood of occurrence of electric corrosion is accurately assessed.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method and device for calculating DC interference of buried metal pipelines. Background technique [0002] When a direct current flows into the ground at the ground pole of the direct current transmission system, a direct current field will be formed in the soil near the pole site, accompanied by a rise in earth potential. DC stray currents can flow on the pipe near the ground electrode and cause galvanic corrosion in the area where it exits the pipe. [0003] In the previous calculations of the corrosion effects of DC grounding currents on adjacent buried oil and gas pipelines, the same calculation methods as the impact of AC grounding currents on buried oil and gas pipelines were mostly used, and pipeline anti-corrosion layers were rarely considered in the calculations. DC "polarization effect" at the metal-soil interface at the point of damage. For pipelines withou...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06Q10/06G06Q50/06
CPCG06Q10/0635G06Q50/06G06F30/20G06F2113/16
Inventor 白锋郭剑杜艳霞董亮曹方圆刘元庆谭波曾飞
Owner CHINA ELECTRIC POWER RES INST
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