基于覆冰拉力监测系统的耐张塔线路等值冰厚计算模型

输电线路覆冰严重影响电网的安全稳定运行,准确监测线路覆冰情况具有重要的工程意义和应用价值.为了精准判断线路覆冰厚度,提出一种基于覆冰拉力监测系统的复合荷载作用下耐张塔线路等值冰厚计算模型,以在线监测终端监测拉力和角度为输入参量,计及耐张绝缘子串非均布荷载和风荷载影响,并修正重力方向荷载对计算模型加以改进.与雪峰山自然观冰站试验数据和南方电网重覆冰区段监测终端运行数据对比,验证了该计算模型的准确性.结合工程实际应用,验证了其对判断耐张塔线路覆冰情况具有一定的指导作用.

Equivalent Ice Thickness Calculation Model of Strain Tower Based on Iced Tensile Monitoring System

The ice coating on the transmission line seriously affects the safe and stable operation of the power grid. It is of great engineering significance and application value to accurately monitor the ice coverage of the line. In order to accurately judge the icing thickness of transmission lines, a calculation model of equivalent icing thickness of strain tower lines under combined loads based on the icing tension monitoring system is proposed, in which the tension and angle of strain tower lines are monitored on-line as input parameters, the effects of non-uniform distributed loads and wind loads of strain insulator strings are taken into account, and the calculation model is improved by modifying gravity direction loads. Compared with the test data of Xuefengshan Natural View Ice Station and the operation data of monitoring terminal in the overlying ice section of the South China Power Grid, the accuracy of the calculation model is verified. Combining with the engineering practice, this paper has a certain guiding role in judging the icing situation of the strain tower.