输电线路树闪故障分析及树线距离预测方法研究

Research on Tree Flash Failure Analysis and Tree Line Distance Prediction Method for Transmission Line

摘要: 为应对线下超高树木引发的树闪故障，通过分析树闪故障隐患，确立树线距离预测的要素，在此基础上，根据树种类型及立地条件，建立树木生长模型，并依据输电线路应力变化以及温度等条件，建立导线弧垂变化模型。利用上述两个模型预测树线间距，提高电网运行的安全性。

Abstract: In order to cope with the tree flash failure caused by the ultra-high trees under the line, the tree line distance prediction factor is established by analyzing the hidden troubles of the tree flash fault. On this basis, the tree growth model is established according to tree type and site conditions, and the cable sag change model is established according to the stress change and temperature change of transmission line. The above two models are used to predict the spacing between tree lines and improve the safety of power grid operation.