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access icon openaccess Simplified approach of maximum electric field distribution on the ground near HVAC–HVDC shared tower transmission lines

This is an open access article published by the IET under the Creative Commons Attribution-NonCommercial-NoDerivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/)
Received 14/08/2018, Accepted 31/08/2018, Published 21/09/2018

This study extends the superposition method proposed by the Electric Power Research Institute to calculate electric field distribution on the ground near high voltage alternating current-high voltage direct current (HVAC-HVDC) shared tower transmission lines under ultra high voltage (UHV). Maximum electric field on the ground can be easily superposed by electric field when two circuits act separately, and when one circuit acts, thhe other circuit is regarded as ground wires. The ac field is calculated by method of images. The dc field is calculated by a finite element method (FEM). A precise time-domain FEM is used to calculate the hybrid electric field for comparison. Dispersion between results of superposition and time-domain FEM confirms that the superposition method is less time consuming and can satisfy engineering precision.

Inspec keywords: finite element analysis; power transmission lines; poles and towers; HVDC power transmission; electric fields

Other keywords: hybrid electric field; ac field; HVAC–HVDC shared tower transmission lines; ground wires; simplified approach; dc field; finite element method; maximum electric field distribution; precise time-domain FEM; superposition method; Electric Power Research Institute

Subjects: Finite element analysis; d.c. transmission; a.c. transmission

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