架空输电线路在线监测覆冰力学计算模型  

A Mechanical Calculation Model for On-line Icing-monitoring System of Overhead Transmission Lines

作　　者：阳林[1] 郝艳捧[1] 黎卫国[1] 戴栋[1] 李立浧[1] 朱功辉[2] 罗兵[2] 

机构地区：[1]华南理工大学电力学院,广东省广州市510640 [2]中国南方电网公司电网技术研究中心,广东省广州市510623

出　　处：《中国电机工程学报》2010年第19期100-105,共6页Proceedings of the CSEE

基　　金：中央高校基本科研业务费专项资金资助项目(2009ZZ0008);国家重点基础研究发展计划项目(973项目)(2009CB-724507);"十一五"国家科技支撑计划重大项目(2009BAA23B02)~~

摘　　要：架空输电线路覆冰在线监测系统要求准确监测输电线路覆冰状况。为准确计算覆冰,提出了以绝缘子串悬挂点拉力和倾斜角为基本参量,考虑风偏因素,将导线力学参量归算到风偏平面,并通过风偏平面内竖直方向上的静力学受力平衡计算覆冰厚度的力学计算模型。针对贵州电网覆冰在线监测系统运行数据,利用该模型计算的导线覆冰结果与监测系统采集的现场微气象和监测照片数据均吻合较好,验证了该计算模型的准确性和灵敏性。Accurate calculation on the icing condition of overhead transmission lines is a must for the on-line monitoring and pre-warning system. Therefore, a new mechanical calculation model was established based on the parameters of obliquities and tension at suspended point of insulator strings of the towers considering the deviation angel of insulator strings due to wind. In this model, mechanics parameters of conductors were turned into the new coordinates after deviation angel of insulator strings due to wind. A statics force balance equation was built in the vertical direction of the new coordinates after deviation. According to the real time operation condition of on-line icing monitoring system in Guizhou Power Grid, both the micro-climate data and the monitoring photos about the same transmission line tower were in accord with the calculation results of icing, verifying the accuracy and sensitivity of this newly developed mechanical calculation model.

关 键 词：覆冰 架空输电线路 在线监测 力学计算模型拉力 角度 

分 类 号：TM75[电气工程—电力系统及自动化]