基于热稳定计算的架空地线分析研究

Based on the Thermal Stability Calculation Analysis of the Overhead Ground Wire

从地线热稳定角度出发,针对输电线路发生单相接地短路故障,先计算两根架空地线返回的总电流,再确定每根地线分配的电流,最后校核地线热稳定。结合220kV张家坝变至秀山变线路工程实际,通过对地线组合OPGW与铝包钢绞线进行热稳定校核分析,为输电线路架空地线选型、校核提供参考。

This article from the ground thermal stability point of view, in transmission line single-phase grounding short-circuit fault occurs, first calculate the two overhead ground wire returns the total current, and then determine the distribution of each ground wire current, finally checking each ground wire thermal stability. According to the 220kV Zhangjiaba substation to Xiushan substation transmission line engineering, based on the 0PGW and ACSC thermal stability analysis, and provide a theoretical reference for the transmission lines overhead ground wire selection and checking.