Method for setting analog charges in wire in power transmission line electric field calculation

Abstract

The invention discloses a method for setting analog charges in a wire in electric field calculation of a power transmission line, which comprises the following steps of: a, uniformly setting a plurality of analog wire charges on a certain concentric circle of each phase of equivalent wire, and setting corresponding matching points and check points on the surface of the wire; b, calculating an analog charge matrix; c, calculating the potential error of the check point; and d, obtaining the radius of a simulated charge distribution circle which minimizes the potential error of the check point byusing a particle swarm optimization (PSOCSM) simulated charge method, calculating the coordinates and charge quantity of the corresponding simulated charge group, and finally calculating the electricfield around the power transmission line according to the simulated charge group. According to the method, the optimal setting of the analog charge in the wire can be effectively realized, and compared with the conventional setting method (central single-wire method) of the analog charge in the wire, the potential error of the check point is greatly reduced, and the electric field calculation precision is improved.

Description

technical field [0001] The invention belongs to the field of electric field calculation, and in particular relates to a method for setting analog charges in conductors in electric field calculation of transmission lines. Background technique [0002] With the rapid development of my country's economy, various high-voltage transmission projects have been constructed one after another, so the electromagnetic environment around the transmission line has also begun to receive close attention. Among them, the power frequency electric field generated by the high-voltage transmission line is the main factor in the electromagnetic environment problem. Compared with the field measurement, the numerical calculation of the electric field can save a lot of manpower, material resources and time, and the electric field distribution of the whole field can be obtained by calculation. Therefore, by calculating the power frequency electric field around the high-voltage transmission line, it ...

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Problems solved by technology

However, the calculation accuracy of the method of setting one line charge is limited, and it cannot well satisfy the potential boundary conditions of the wire; the empirical formula method is not suitable for the case where there are 2 to 5 simulated line charges in the wire, and if too many line charges are set It will significantly increase the amount of calculation, and at the same time, the determination of its position depends on human experience, which cannot guarantee the optimal CSM

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