Development for 3D Visualization Application System of Transmission Line Crossing Construction Under Micro-meteorology

Currently, there is no consistent conclusion on the relationship between air humidity and the corona onset field of the conductor which cannot be directly applied to the calculation of corona onset field of transmission lines under micro-meteorology, and there is no specialized three-dimensional visualization application system of transmission line crossing construction under micro-meteorology in China. Firstly, this paper proposes a correction formula for corona onset field considering air humidity and a calculation formula for relative air humidity and air relative dielectric constant; Besides, in order to improve the calculation accuracy and speed of corona onset field strength, a three-dimensional visualization application system is established using the simulated charge method instead of the finite element method. Secondly, this paper introduces the functional requirements and design scheme of the application system including the design of hardware system and software system. Finally, the 3D visualization application system is established and simulation tests are successfully completed on three-phase AC transmission lines with 500 kV. The results show that the maximum relative error between the three-dimensional simulated charge method and the finite element method is within 5%, and the results prove the effectiveness of the system.