Parallel radio interference calculation and optimization method for high voltage AC/DC line

Abstract

The invention relates to a parallel radio interference calculation and optimization method for a high voltage AC / DC line. According the relevant information of an existing actual high voltage AC / DC parallel transmission line, including the AC line voltage level, the number of circuits, the DC circuit voltage level, the line structure and the like, a two-dimensional hybrid radio interference calculation model is established; for input model parameters, considering the interaction between AC and DC, an empirical formula method and an excitation function method are used to calculate the radio interference under the mutual influence of AC and DC lines, and geometrical superposition is performed to obtain a hybrid radio interference value of the transmission line; at the same time, and throughthe calculation of hybrid radio interference for different line heights and parallel distances, the optimization method for radio interference is selected. According to the parallel radio interferencecalculation and optimization method, the radio interference intensity of the high-voltage AC / DC parallel transmission line is reduced, and the purpose of optimizing the electromagnetic environment ofthe high-voltage AC / DC parallel line is achieved.

Description

technical field [0001] The invention belongs to the technical field of radio interference environment evaluation of power transmission lines, and in particular relates to a radio interference calculation and optimization method for parallel high-voltage AC and DC lines. Background technique [0002] With the continuous construction of ultra-high voltage and ultra-high voltage transmission lines in my country, the implementation of projects such as national grid connection of power systems, north-south interconnection, and west-to-east power transmission, the AC-DC parallel transmission pattern of my country's power grid has basically formed. The development of the power grid has made the transmission corridors increasingly scarce, especially in economically developed areas, and the parallel erection of AC and DC lines is inevitable. With the emergence of AC-DC parallel lines, AC-DC hybrid radio interference has attracted more and more attention. [0003] Scholars and resear...

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Problems solved by technology

[0004] Through the foregoing, the inventors found that although domestic and foreign researches have already been able to calculate the method of AC-DC hybrid radio interference, it is mainly calculated separately. In the calculation process, the influence between the AC line and the DC line is ignored, and then superimposed. This makes the calculation accuracy of radio interference of AC and DC parallel lines lacking, and needs to be improved in these aspects

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