Research on calculated method for space electric field around HVDC transmission lines with buildings nearby

Abstract

High voltage direct current (HVDC) transmission technology has incomparable advantages in long‐distance and large‐capacity transmission. With the development of HVDC transmission technology, transmission lines inevitably pass through some densely populated and economically developed areas. Due to environmental considerations, the space electric field around the buildings that are adjacent to HVDC transmission lines has aroused increasing attention. However, it is hard to be predicted by simulation because of the calculation complexity. This paper proposed a new calculated method to obtain the composite electric field around HVDC transmission lines with adjacent residential buildings, and the validity and correctness of the method are verified by the experimental results. Then, the distortion of the electric field around the building and its impact on the design of the safe corridor width of the HVDC transmission line is analyzed. The proposed method, unlike existing methods, can be used to predict the space composite electric field distribution around HVDC transmission lines and their adjacent residences, which are of arbitrary material, shape, and size. It can provide guide for the optimal design of transmission line corridors.

Numerical Analysis of Ion Flow in One-Bipole HVDC Transmission Line Using Revised Charge Injection Methods

“…Most methods introduced so far probably show reasonable agreement with experimental results [13], [14]. In other words, even if the method of calculating the surface charge around the conductor changes, the electric field distribution on the ground cannot be practically altered much.…”

“…Recently, several advanced methods have been developed for the simultaneous numerical calculation of the electric field and ion current density near the ground. These methods not only aim for precision but also strive for reduced computation time and enhanced efficiency, reflecting the evolving technological field [13]. The finite-element method (FEM) was initially proposed in 1979 by G.Cela [6], [7].…”