The Ionized Fields and the Ion Current on a Human Model Under \pm 800-kV HVDC Transmission Lines

The ultra-high-voltage direct-current (UHVDC) system has many advantages in long-distance power transmission. This paper is aimed at analyzing the distributions of the ionized fields and the ion current on the human model under ±800-kV UHVDC transmission lines; therefore, a numerical method which combines the 3-D charge simulation method and Deutsch's assumption is used. And the validity of the presented method is demonstrated through a test in the laboratory. For ±800-kV UHVDC transmission lines, the ionized fields and the ion current on the human model are calculated, and numerical results show that the ionized fields and the ion current density on the top of the human model increase evidently when the human model stands under ±800-kV UHVDC transmission lines. And the total ion current flowing on the human model is far lower than the permitted limit.