同走廊内多回交流线路对在建线路的感应电压电流影响研究

多回电力线路同走廊架设可以避免对土地资源的分割，降低对地方规划和发展的影响，但是同走廊内先期运行的线路会在后建线路导地线架设时产生感应电压和感应电流，影响施工安全。本文针对同走廊内多回交流线路在一在建的直流线路上产生的感应电压电流进行了理论分析和仿真研究，对影响因素包括系统运行方式、线间距离、放线长度等进行了分析，仿真结果表明同走廊内的交流线路由于线间距离较远，感应电压电流不显著，但当在建线路放线长度较长时，需注意放线过程中沿线的感应电压影响。研究成果对电力线路邻近带电线路施工架线具有指导意义。

Influence Research on Induced Voltage and Current of Multi AC Transmission Lines to the Power Line Under Construction in the Same Corridor

Multi power transmission lines arranged in the same corridor can avoid the land division, and reduce the adverse effect on the local planning and development, but the personal safety of operators in the process of towers and conductors erection of subsequent power lines should be seriously considered as a result of the induced voltage and current of the energized transmission lines in the corridor. One DC line under construction taken as an example, induced voltage and current generated from multi AC transmission lines in the same corridor were calculated and studied with ATP-EMTP electromagnetic transient program. The influence factors including the operating mode of the system, the distance between power lines and length of stringing conductors were analyzed at the same time. The research shows that the induced voltage and current are not significant because of lines under construction far from energized lines in the same corridor, while the induced voltage along the stringing conductors will be paid much attention to when the length of stringing conductors are much longer. The research results also have guiding significance to power lines′ construction which is adjacent to live lines.