共用走廊的复杂多回输电线路感应电压和感应电流仿真分析

Analysis of Induced Voltage and Induced Current Simulation of Complex Multi-Circuits Transmission Lines in Common Corridor

针对非同塔或非全线同塔存在共用走廊的复杂多回输电线路,当一回线路停运,其他回线路正常运行时,在停运线路上会产生较大的感应电压和感应电流。首先通过EMTP-ATP仿真软件建立了存在单个近线段的双回输电线路模型,并对近线段水平间距、近线段长度、近线段位置、输送功率等影响因素进行了规律分析。基于以上影响因素规律分析,通过EMTP-ATP仿真软件建立了华北地区某实际在运500 kV双回输电线路模型,计算了不同输送潮流下感应电压和感应电流结果,并给出了线路停电检修时的措施,并制定了相应建议,为500 kV双回输电线路出现相关问题提供一定参考。

For complex multi-circuits transmission lines with common corridors in different towers or all different towers,a large induced voltage and induced current will be generated on the out of operation circuit when the primary circuit is out of operation and the other circuit is in normal operation.Firstly,it uses EMTP-ATP electromagetic transient simulation software to build a double circuits transmission line model with a single near line segment.It analyzes the influence factors such as horizontal distance,length,position and transmission power of the near line segment.Based on the analysis of the above influencing factors,the model of an actual 500 kV double circuits transmission lines in north China is established by EMTP-ATP.It calculates the induced voltage and induces current under different transmission currents.It also gives suggestions for the maintenance of power outage which providing some reference for related problems of 500 kV double circuit transmission line.