Magnetic Field Calculation Under Unconventional Lines with Increased Power Delivery

To achieve net-zero emission in America by 2050, high voltage transmission capacity must expand approximately 60% by 2030 and triple by 2050 to connect further renewable(wind and solar) facilities to demand. We will fail to achieve a net-zero America through 100% renewables by 2050 unless high-capacity overhead lines are developed in conjunction with other technological advances. To tackle this problem, we developed a revolutionary and flexible design for transmission lines(TL) by changing phase configurations and sub-conductors into unconventional way, geometrically optimal arrangements within the space. To realize these unconventional high surge impedance loading (HSIL) lines, different line design aspects need to be studied. This paper calculates and studies the magnetic field under the aforementioned lines. When calculating the magnetic field from conventional lines at/or near ground level, we can assume an equivalent conductor located in the center of each bundle, however this is not the case for unconventional HSIL lines. As the distance between subconductors is comparable with their height from the ground, we have to calculate the magnetic field generated by each subconductor, so the equivalent conductor mentioned above does not work.