High pressure overhead power line power frequency electric field shielding analysis method

Abstract

The invention discloses a high voltage overhead transmission line power frequency electric field shielding analysis method, which comprises building a physical model for a high voltage overhead transmission line according to the arc sag lowest point, considering the high voltage overhead transmission line at the lowest point as a round transmission line parallel with ground, adopting the physical model as a two-dimension physical model formed by the section of the round transmission line, and utilizing charge simulation method to calculate the electric field intensity at any point of the shielded high voltage overhead transmission line. The invention adopts a simple method to confirm the maximum value of the electromagnetic field distribution of a transmission line in a controllable range of the calculated result, thereby completely considering the safety of the electromagnetic condition around the transmission line in the analysis of the invention, the invention can process the comparative analysis of the line at various condition, can realize the research about the field distribution change of the line under various shielding devices, and can quickly provide an optimization scheme of the shield on the power frequency electric field of a prior overhead high voltage transmission line, to find an ideal overhead line scheme.

Description

technical field [0001] The invention relates to a method for analyzing the safety of a transmission line, in particular to a method for analyzing the shielding of a power frequency electric field of a high-voltage overhead transmission line. Background technique [0002] The unsafe factors of high-voltage overhead transmission lines to the surrounding environment are mainly generated by the power frequency electric field. In the prior art, the influence of the power frequency electric field on the surrounding environment is generally eliminated by using shielded wires or shielding nets. As for the power frequency electric field distribution after shielding, a unified and simple analysis method is needed, which is conducive to taking shielding measures in a targeted manner. [0003] The existing power frequency electromagnetic field calculation software under the transmission line mainly performs a single field distribution calculation, which is not efficient and lacks intuit...

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Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide a high-voltage overhead transmission line power frequency electric field shielding analysis method, which can overcome the comparative analysis defects of the existing power frequency electromagnetic field calculation software under the power transmission line, and analyze in a simple way, which can ensure The maximum value of the electromagnetic field distribution of the transmission line is within the range controlled by the calculation results, so the analysis of the problem can fully consider the safety of the electromagnetic environment around the transmission line, and can carry out comparative analysis of various situations of the line and erection of various The research on the change of the field distribution behind the shielding device can quickly propose an optimization plan for the shielding treatment of the power frequency electric field of the existing overhead high-voltage transmission line, so as to find out the ideal wiring method

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