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

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...

AI Technical Summary

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 will be high, which may affect the normal work of construction, maintenance or measurement personnel, and in severe cases will cause corrosion of the pipeline

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