考虑架空输电线路状态的线路覆冰监测系统的研究  

Study on monitoring system of transmission line icing considering the state of overhead transmission lines

作　　者：陈金熠[1] 范春菊[1] 胡天强 胡益忠 

机构地区：[1]上海交通大学电气工程系,上海200240 [2]华东送变电工程公司,上海201803 [3]上海欣影电力科技发展有限公司,上海200331

出　　处：《电力系统保护与控制》2012年第15期93-98,共6页Power System Protection and Control

摘　　要：近年来,我国输电线路冰灾情况日益严重,能够准确监测线路覆冰情况,进而采取防冰、除冰的措施显得至关重要。目前国内已经有了些架空线路的覆冰力学模型,但各个模型对于现场线路覆冰的监测还有一定的误差。分析了现有的覆冰力学计算模型,提炼了力学模型的关键计算量,提出基于直线塔受力分析的覆冰计算模型。该模型利用架空线路状态方程计算导线温度和外力变化,导线长度、水平应力和垂直荷载的变化,从而求解出导线覆冰的重量和覆冰的等值厚度。该覆冰模型已经应用在覆冰在线监测系统里面,涵盖覆冰模块的建模以及监测系统的监视和告警功能的展示。通过实例验证,该模型能准确监测输电线路的覆冰情况,并正确做出覆冰告警。Recently, the ice disaster of overhead transmission lines is increasingly severe in China. It＇s very important for us to monitor the icing of transmission lines and take measures to deal with anti-icing and deicing. At present, there are a few mechanical calculation models of overhead lines in China. However, these models have some errors in monitoring the field condition. After analyzing the existing models and extracting the key calculation parameters, an icing calculation model based on the analysis of mechanics on straight tower is proposed. The model takes advantage of the state equation of overhead lines to calculate the length of lines, horizontal stress and vertical load under the change of temperature and external force, then we can get the weight of icing and the equivalent icing thickness. Moreover, the icing model has been applied to the on-line monitoring system, which includes the modeling of icing module, the supervision of warning system and the display of alarm function. An application example shows that the icing model is able to monitor the icing condition of overhead line accurately and make the correct icing alarm.

关 键 词：覆冰 架空线路 直线塔 在线监测系统 告警 

分 类 号：TM755[电气工程—电力系统及自动化]