Remote Monitoring And Information Processing Of Transmission Line Icing

Transmission lines are important power transmission facilities which are composed of conductor, insulator, fittings and tower, the safe and stable operation of transmission lines is related to national economic development as well as the security and stability of society. However, they exposure to the wild all year, and can be easily destroyed by the natural factors, where conductor icing is one of the main factors affecting the security of the transmission line, The overload and galloping of the conductor caused by the icing can lead to phase flashover, equipment damage, power failure, tower falling down, wire break and other serious accidents, so the early discovery and forecasting of conductor icing become important.Ice monitoring system is composed of two parts: the ice monitoring device and the upper manage system. This paper designs the overall program of icing and meteorological information remote monitoring system for transmission line, meanwhile studies the overall system architecture based on GPRS wireless networks and also with the data transmission and software modules in detail design. This paper focuses on the analysis and research of the methods of information processing of upper ice manage system, with the basis on the acquired weather information and icing image, it studies the models of icing and method of frequency analysis, and proposes a new calculation method of the thickness of transmission line icing based on image segmentation so as to estimate the severity of the icing, it uses improved level set algorithm with mixed functional model to extract the image edge and calculates the increased area, the final thickness and equivalent load of the conductor icing can be gained by comparing with the intrinsic size of the conductor area and conductor diameter, also the growth rate of the conductor icing will be known by calculating the difference of two ice thickness in a certain period of time, thus the situation and trend of transmission line icing can be evaluated correctly.Finally, this paper studies the detailed implementation of the monitoring system, including design of database and implementation of functional modules, moreover it completes analysis of icing frequency base on the sample of maximum ice thickness every year and gets the design value for transmission line, it calculates the ice thickness base on transmission line models using the icing images and the weather information obtained by the monitoring system, and finally it focus on the calculation of ice thickness based on image segmentation. Experimental results show that this algorithm can get a good segmentation of icing image with the advantages of high precision and low time cost. The result of icing thickness is closed to the actual value by comparing to the measured data which can correctly reflect the equivalent icing status of the conductor.