Attenuation Characteristics of High Voltage Power Line Communication Channels for Underground Pipe Gallery

In the underground pipe gallery environment, high voltage (HV) power lines have been commonly placed to improve signal transmission performance, so as to meet the growing demand for electricity. Due to diverse conduit materials and potential electromagnetic interference can significantly impact the signal propagation in the HV power line communication (HV-PLC) channels, the attenuation characteristics of HV-PLC channels in underground pipe gallery is crucial. In this paper, the simulation channel transmission model based on the HV power line carrier circuit are correctly established, in which the key parameters such as cable types, conduit materials, signal frequencies, and environmental conditions are considered. Finally, the research of attenuation characteristics of HV-PLC in the underground pipe gallery is carried out in detail, which becomes possible to predict and analyze the attenuation levels of the transmitted signals. Simulation results show that influence different arrangements of power cable line on the attenuation of the HV-PLC channels in the pipe gallery is clearly different. Besides, attenuation of the underground power cables has a significant increase compared with the over-head power cables, which has great significance for the future design and optimization of HV-PLC systems in the urban underground power pipe gallery.