Passive Interference Characteristics of Transmission Lines on Rough Ground and Optimization of Protection Spacing

• Published in: IEEE transactions on electromagnetic compatibility 2023-02, Vol.65 (1), p.1-12
• Main Authors: Yu, Pengcheng, Jiao, Chaoqun, Zhang, Jiangong, Gan, Zheyuan
• Format: Article
• Language: English
• Subjects: Algorithms; Correlation; Electromagnetic scattering; Interference; Optimization; Passive interference; Permittivity; power transmission line; Power transmission lines; protective distance; Radio stations; rough ground; Sandy loam; Shielding; Short wave radio transmission; Soil; Transmission line measurements; Transmission lines
• ISSN: 0018-9375; 1558-187X
• DOI: 10.1109/TEMC.2022.3218690

In order to more accurately calculate the passive interference level of the transmission line, combined with the topographic features of the transmission lines in China, four types of rough ground were selected. The influence of the presence or absence of rough ground on the passive interference of transmission lines is studied, the results show that the level of passive interference when the ground is rough ground is 49.1% lower than that when the ground is a pure conductor. Then, the influence of four different ground types on the passive interference of transmission lines is studied. The results show that under the excitation of short-wave radio stations, the sandy loam land has the strongest influence on the passive interference of transmission lines and surrounding environment. Finally, the traditional method of solving the shielding distance between the transmission line and the surrounding radio stations is optimized, and it is applied to the solution of the shielding distance between the medium and short-wave radio stations. The results show that there is a 6.7% error between the traditional algorithm and the optimized algorithm, and the protection distance value obtained by the optimized algorithm is more representative and accurate.