Leshchenko O. Determination of ice loads on overhead power transmission lines based on the data modeling and monitoring

Thesis deals with the icing on the conductors of overhead transmission lines, improve the methods for determining ice loads on OHL based on the data modeling and monitoring. The dissertation is a critical analysis of the literature devoted to the study of the features of icing on the overhead lines, the principles of calculation of ice loads on OHL, as well as how to improve the operational reliability of the structural power grids under the influence of ice loads and impacts. With the help of advanced mathematical models Makkonen made numerous studies of icing parameters, the results of which were obtained conductor twisting angles of overhead lines of 35-110kV, depending on their geometric and climatic conditions. Experimental studies icing on overhead lines, the results of which provides limits of weight change ice deposits caused by twisting of conductor. Received sufficient convergence with theoretical assumptions that allowed us to obtain the mass of icing on time accretion. The results of experimental tests measuring device of ice have established that the variability of the wind direction affects the weight and structure of the ice deposits. The method of determination of ice loads on overhead lines, based on monitoring data ice deposits and an automated record-keeping on ice events for the calculation of ice loads on OHL.