Analysis of the Shielding Effect of Distribution Lines on Electric Field Intensity Near UHVAC Transmission Lines

To effectively solve the problem of electric field exceeding the limit at sensitive environmental points near the built ultra-high voltage AC transmission lines, a method of using adjacent medium and low voltage distribution lines to control the electric field was proposed. In this method, a three-dimensional electric field simulation model with ultra-high voltage AC transmission lines, distribution lines, and buildings is established. Meanwhile, the finite element method is used to calculate the shielding effectiveness of the distribution lines and the relationship between the position of the distribution lines and shielding effect. The calculation results show that when the building is within the shielding range of the distribution lines, it can effectively reduce the power frequency electric field intensity generated by the UHVAC transmission lines. Meanwhile, an optimal installation position of the distribution line is proposed to improve the shielding effect on the building.