A Rapid Prediction Method of Three‐Dimensional Total Electric Field Under UHVDC Transmission Lines With Buildings Nearby

ABSTRACT The proliferation of ultra‐high voltage direct current (UHVDC) transmission technology has heightened regulatory oversight of electromagnetic fields around buildings. In conventional direct current (DC) line design, the presence of residential areas was typically not taken into account. GB 39220‐2020 now requires environmental assessments for residential balconies and platforms. The impact of nearby residential buildings has to be taken into account during the design of DC lines, necessitating the calculation of the three‐dimensional total electric field. This study introduces a parallel charge simulation method‐flux tracing method to quickly calculate the 3D total electric field near buildings in proximity to UHVDC lines, which is crucial for engineering design and environmental assessment. The method significantly speeds up calculations, with a 4–15 times faster ratio using 16–32 threads. It also analyses how UHVDC line dimensions, distances to buildings and parameters of residential buildings affect the maximum electric field on platforms. By using regression analysis, the formula for predicting the maximum electric field is obtained, and the traditional calculation time is improved. This advancement provides efficient predictions and detailed 3D electric field distributions for engineering and environmental assessments.