Calculation and optimization method for high-voltage alternating current/direct current parallel line mixed electric field

Abstract

The invention provides a calculation and optimization method for a high-voltage alternating current / direct current parallel line mixed electric field. The method comprises the following steps that: determining the relevant information of a high-voltage alternating current / direct current parallel line, and constructing a two-dimensional mixed electric field calculation model according to the relevant information; aiming the voltage class of a corresponding high-voltage alternating current / direct current power transmission circuit and an interval space between an alternating current circuit anda direct current circuit, adopting a meshfree method to carry out a solving operation on a calculation model to obtain mixed electric field intensity when the high-voltage alternating current / direct current is parallel, and changing the height and the parallel interval of the circuit; and obtaining an optimal mixed electric field environment. When the method is implemented, the high-voltage alternating current / direct current parallel line mixed electric field can be predicted, the height and the interval distance of the high-voltage alternating current / direct circuit can be analyzed and regulated so as to lower the mixed electric field intensity of the high-voltage alternating current / direct current power transmission circuit, and a purpose that the electromagnetic environment of the high-voltage alternating current / direct current parallel line is optimized is achieved.

Description

technical field [0001] The invention relates to the technical field of electromagnetic environment evaluation of transmission lines, in particular to a calculation method for a mixed electric field of a high-voltage AC / DC parallel line. Background technique [0002] With the rapid development of urbanization, the demand for electric energy is increasing, and more and more high-voltage transmission lines will be put into construction. Due to the shortage of land resources, in order to save power transmission corridors, parallel transmission of high-voltage AC lines and DC lines will be inevitable. [0003] Scholars and research institutions at home and abroad have found that the ion flow field generated by the high-voltage DC line has a great influence on the electric field on the ground, and when the DC line and the AC line are transmitted in parallel, the ion flow field in the space is different from the case of only DC transmission. , leading to the difficulty of predicti...

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Problems solved by technology

[0004] However, the inventors have found that although domestic and foreign researches have been able to calculate the method of the AC-DC mixed electric field, there are still deficiencies in the calculation accuracy and calculation speed, and it is necessary to improve these aspects

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