Volume Rendering of Electromagnetic Field
Visualization of the electromagnetic field on the high voltage transmission line is important for the electrical engineering society and also for environmental agencies. The latter do not directly calculate the field values, but need a visual representation for their analysis. The proposed visualization system is based on precise 3D calculations of electromagnetic fields on double circuit 400 kV transmission lines. The volume ray casting visualization technique is employed. The intensity is calculated using local maximum intensity projection, where the first local maxima of the sampled values exceeding the pre-specified threshold are displayed. Finally, a look-up table of the heat map colour scale is used to obtain the final image. The proposed system enables observers to move and observe the electromagnetic radiation within the 3D space. Interactive change of the scale is possible for the influential areas. Voxel representation of electromagnetic field is created as a graphical application and enables users to display the field independently from the numerical program tools.