输电线路覆冰厚度监测技术研究与应用

发布时间：2018-04-20 15:52

本文选题：输电线路 + 覆冰厚度　；参考：《华北电力大学》2014年硕士论文

【摘要】：在潮湿低温的环境下输电线路很容易产生覆冰现象，输电线路覆冰会导致断线、金具损坏、绝缘子串冰闪、基础下沉或倾斜，甚至杆塔倒塌、导线接地等事故，，严重威胁了电力系统的正常运行，影响了人们正常的生产和生活。因此，加强对输电线路覆冰厚度监测技术的研究，实时掌握输电线路的覆冰状态对于电力系统的安全稳定运行具有十分重要的现实意义。本文提出了一种输电线路覆冰在线监测系统总体方案设计，利用张力传感器、角度传感器、工业摄像机、温度湿度传感器以及风速风向传感器采集现场数据，通过GPRS网络和Internet网络将现场采集到的数据传送到电力系统监控中心主站，最终经输电线路覆冰厚度计算软件得出输电线路的覆冰厚度。在总体方案设计的基础上，对张力传感器、角度传感器、GPRS传输模块、电源的选择原则进行了总结，并且给出了具体的选型方案。针对输电线路覆冰在线监测方案中的核心模块——输电线路覆冰厚度计算模块，本文提出了一种基于力学测量的输电线路覆冰厚度计算模型。该模型考虑了有风与无风两种情况，以耐张段轴向导线张力、悬挂点倾角和悬垂绝缘子串张力等数据为模型的基本特征参数计算输电线路覆冰厚度。通过模拟试验的方法对本文提出的输电线路覆冰厚度计算模型进行了验证，利用铝线模拟实际输电线路，利用小型拉力传感器与悬挂吊环模拟绝缘子串，在输电线路上均匀涂抹面团来模拟输电线路覆冰。对单独耐张段以及三档连续导线的试验结果显示本文提出的输电线路覆冰厚度计算模型计算误差较小，能够满足计算精度的要求。
[Abstract]:In humid and low temperature conditions, it is easy for transmission lines to be covered with ice. The icing of transmission lines can lead to breakage, damage to hardware, ice flashes of insulators, sinking or tilting of foundations, even collapse of towers, grounding of conductors, and so on. It seriously threatens the normal operation of power system and affects people's normal production and life. Therefore, it is of great practical significance to strengthen the research on the monitoring technology of the icing thickness of the transmission line and to grasp the icing state of the transmission line in real time for the safe and stable operation of the power system. In this paper, an overall scheme of on-line monitoring system for transmission line icing is proposed, which uses tension sensor, angle sensor, industrial camera, temperature and humidity sensor and wind speed and wind direction sensor to collect field data. The data collected in the field are transmitted to the main station of the power system monitoring center through GPRS network and Internet network. Finally, the ice thickness of the transmission line is obtained by the software of icing thickness calculation of transmission line. On the basis of the overall scheme design, the selection principle of the tension sensor, angle sensor GPRS transmission module and power supply is summarized, and the specific selection scheme is given. In view of the core module of on-line monitoring of transmission line icing, the calculation module of transmission line icing thickness, a calculation model of transmission line icing thickness based on mechanical measurement is proposed in this paper. In this model, both wind-free and wind-free conditions are taken into account. The basic characteristic parameters of the model, such as the tension of the axial conductor, the inclination of the suspension point and the tension of the suspended insulator string, are used to calculate the ice thickness of the transmission line. The calculation model of icing thickness of transmission line proposed in this paper is verified by simulation test. The actual transmission line is simulated by aluminum wire, and insulator string is simulated by small tension sensor and suspension ring. Apply dough evenly over the transmission line to simulate the icing of the transmission line. The experimental results of single stretch section and three-stage continuous conductor show that the calculation error of the model proposed in this paper is small and can meet the requirement of calculation accuracy.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM752

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