高土壤电阻率山区输电管廊接地特性研究OA

Power transmission in pipeline corridors is of great significance in solving the problem of new energy transmission,and its grounding system is related to the safe operation of the equipment.The au-thor uses CDEGS modeling to systematically analyze the effects of soil resistivity,length of the pipeline corridor,and spanning distance between the through ground and the main structural reinforcement on the electrical characteristics of the grounding system.The results show that the increase of soil resistivity leads to the linear increase of grounding impedance,and the growth rate is faster in short corridors;the increase of corridor length can gradually reduce the grounding impedance,but when the length of the hall is more than 4 km,the effect of resistance reduction is no longer apparent;the shortening of the spanning distance between the ground penetration line and the reinforcement bars of the main structure can effec-tively reduce the grounding impedance,in which the spanning distance of 100～125 m is more suitable.A comprehensive comparison of the electrical characteristics of the artificial and shield grounding systems in the pipeline corridor found that the shield grounding system is more effective in controlling the voltage distribution in the pipeline corridor in a high-resistance long-distance power transmission environment.The research provides theoretical support for optimizing the grounding scheme for transmission corridors in high-resistance areas,which contributes to the safe and stable operation of transmission corridors.