Study on Optimization of Single Cycle Live Operation of Double Circuit Transmission Lines in The Same Tower

As China’s economy continues to grow and industrialization accelerates, the country’s electricity demand has reached a new height. In order to improve the efficiency of power transmission and reduce the occupation of land resources, the double-circuit transmission technology of the same tower has been widely used throughout the country. This technology can provide greater power transmission capacity and better quality power compared to a single transmission line, but it also brings unique challenges to overhaul during a single run, which requires in-depth research and analysis. The purpose of this paper is to investigate the change of the surface electric field of the maintenance personnel on the side line of the power outage under the single cycle operation of the same tower double-cycle transmission line, and to compare with the situation under the double cycle operation. Through this research, we hope to reduce the risk to operators, ensure the safety and effectiveness of live work, and improve the quality and standardization of operations. To achieve this goal, we built a model of a 750 KV transmission line using SolidWorks software and incorporated a mannequin into the model. Then, we use the finite element simulation software COMSOL to calculate the surface electric field when the personnel are at the key position of the line, and carry out an in-depth analysis of its influencing factors.