To provide a design basis for ultra-high voltage direct current

extra-high voltage alternating current

and DC grounding electrodes sharing the same tower

this study conducts simulation analysis on the electromagnetic environment of a hybrid voltage tower designed for a UHV project.The limiting values of various electromagnetic environment indicators for hybrid voltage same-tower transmission lines are determined.Calculations are performed on electric field intensity

ion current density

radio interference

and audible noise within the transmission corridor using the hybrid voltage same-tower reference model.Through controlled variable analysis

the impacts of four key factors on the electromagnetic environment are investigated:AC conductor arrangement

DC conductor polarity configuration

grounding electrode operation modes

and tower structural layout.Results demonstrate that the ground-level electromagnetic environment indicators of the reference tower model all meet specified limits

while the vertical spacing between conductors in hybrid voltage towers must satisfy insulation requirements.