Finite Element Method designing of Ionic current density and Electric field for Hybrid Transmission Lines and HVDC

The requirement for renewable energy sources and power is rising, which necessitates the expansion of both the capacities of distribution & transmission. Extra power can be transferred more cheaply when utilizing DC because the RMS and peak voltages are the same, however building new transmission lines is also frequently accompanied by difficult approval processes, competing interests, & higher costs. Therefore, sharing HVDC and HVAC lines on the same tower called hybrid lines is a more economical way to meet the demand. Coronal charges lead to issues like loss of power, loud noise, & interference in radio signals. Additionally, the electromagnetic field beneath the transmission lines at ground level makes people uncomfortable by making a sensation on their hair. Consequently, a systematic analysis of the ion current density, electric field & impact of space charges at ground level is required. This paper uses COMSOL Multiphysics software to calculate the ion current density on the ground & electric field influenced by space charges for hybrid transmission lines & HVDC. Numerous designs in HVDC, including monopolar &bipolar were investigated. For monopolar & bipolar, the effects of wind & ground conductors on space charges were investigated. This paper presents a confirmed HVDC model that may be used to investigate how space charges from DC conductors affect the current density and electric field.