Method for calculating electromagnetic interference of power grid to buried pipe network

A technology of electromagnetic interference and calculation method, applied in the direction of calculation, computer-aided design, complex mathematical operation, etc., can solve the problems of high pipeline-to-ground voltage, affecting the normal work of construction, maintenance or measurement personnel, pipeline corrosion, etc., to achieve harmony symbiotic effect

Pending Publication Date: 2022-01-18
STATE GRID ZHEJIANG ELECTRIC POWER CO LTD SHAOXING POWER SUPPLY CO +3
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Problems solved by technology

If the AC transmission line is too close to the oil and gas pipeline or the parallel coupling relationship is too strong, the pipeline's ground voltage wil

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  • Method for calculating electromagnetic interference of power grid to buried pipe network
  • Method for calculating electromagnetic interference of power grid to buried pipe network
  • Method for calculating electromagnetic interference of power grid to buried pipe network

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Embodiment Construction

[0075] The electromagnetic interference of AC transmission lines on adjacent buried metal pipelines is mainly caused by the AC current in the line in the space electromagnetic field and the ground current. From the mechanism level, it can be divided into inductive coupling effects, resistive coupling effects and capacitive coupling effects. Three categories. The analysis of electromagnetic influence mechanism is the basis for determining electromagnetic influence objects and calculation methods, and also helps to formulate relevant limit values, determine safety distances and implement protective measures.

[0076] Inductive coupling: The alternating current in the transmission line will generate an alternating magnetic field in its surrounding space, causing the buried metal pipeline to generate induced voltage. The alternating magnetic field exists not only in the air but also in the ground. When the buried metal pipeline is relatively close to the transmission line, the mag...

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Abstract

The invention discloses a method for calculating electromagnetic interference of a power grid to a buried pipe network, which comprises the following steps of: dividing a conductor into conductor micro-sections, enabling a potential difference between two ends of the outer surface of each conductor micro-section to be equal to a potential difference between two ends in each conductor micro-section, and establishing an equation set according to the characteristics of continuity, calculating the potential difference between two ends of the outer surface of the conductor micro-segment according to the leakage current, and calculating the potential difference between two ends in the conductor micro-segment according to the product of the impedance of the conductor micro-segment and the axial current; and according to the Kirchhoff's law, obtaining a relational expression between axial current and leakage current on each conductor micro-segment, comprehensively establishing a group of linear algebraic equations, and solving the linear algebraic equations to obtain leakage current distribution on the conductor. The result is used for evaluating the influence of electromagnetic interference on the buried pipe network, so that the risk is controlled in advance, and harmonious co-existence of the power grid and the oil-gas pipe network is realized.

Description

technical field [0001] The invention relates to power grid engineering technology, in particular to the electromagnetic interference analysis technology of the power grid to the buried pipe network. Background technique [0002] Oil and gas pipelines and power grids are the lifeblood of energy security. The rapid economic development in recent years has increased my country's demand for energy. However, my country's special geographical environment has created a geographically reversed energy layout and power consumption dominated by fossil energy. This makes large-scale, long-distance energy transmission inevitable. As of now, my country has 160,000 kilometers of oil and gas pipelines in operation. In order to give full play to the advantages of limited land resources, power lines and oil and gas pipelines are inevitably There will be crossing of paths, and in some land-constrained areas, there are even long-distance shared public corridors. A large number of power channels a...

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Application Information

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IPC IPC(8): G06F30/18G06F30/20G06F17/12G06F111/10G06F113/04G06F113/14
CPCG06F30/18G06F30/20G06F17/12G06F2111/10G06F2113/14G06F2113/04
Inventor 张金鹏丁梁寇晓适郭磊张科董曼玲徐碧川
Owner STATE GRID ZHEJIANG ELECTRIC POWER CO LTD SHAOXING POWER SUPPLY CO
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