配电线路感应雷电流及磁场的仿真分析

摘要

Through the utilization of electromagnetic analysis technology in ANSYS finite element software and the combination with the mathematical model of regulation algorithm, lines parameters and environment factors, simulation analysis was made to the changes characteristics of online induction lightning current and the magnetic field strength of 35 kV three-phase overhead power distribution lines caused by the nearby lightening. Simulation results show that lightning near the overhead lines will cause magnetic field strength change violently on the wire. The closer the lightning point line, the greater the induction lightning current. Induction current, relative to lightning current, has obvious hysteresis quality. The simulation analysis provides the improvement of safety and reliability of distribution lines and valuable references for the design and reform of lightning protection on the distribution lines.%　　利用ANSYS有限元分析软件的电磁场分析技术，并结合规程算法数学模型与线路参数、周围环境因素，对35 kV配电线路由于附近受雷击引起线路上的感应雷电流及磁场强度的变化特征进行仿真分析。结果表明：雷击架空线路附近将引起线路上磁场强度激烈变化，越靠近雷击点的线路感应雷电流越大，并且相对雷击电流具有明显的滞后性。仿真分析为提高配电线路的安全可靠性及线路防雷设计、改造提供有价值的参考依据。