Modelo matemático de linhas de transmissão, contemplando influências ambientais, para o trecho Guamá-Utinga, localizado em Belém, pertencente à Eletronorte

Abstract

Theoretically, the prediction of failure in the chain of insulators can be found by checking the behavior, of the harmonic current through the insulators, called leakage current. This is because the capacitance of a chain of insulators allows the passage of components of higher order harmonics of the current line, however the design and planning of transmission lines, only take into account the size and geometry of the line, forgetting or ignoring the effects environment in a line of transmission, the omission of such effects can confuse the diagnosis of failure in the system of isolation of the line, so it was necessary to develop a methodology for determining the values of electrical parameters, electrical resistance and capacitance as a function of environmental variables as: temperature, solar radiation, relative humidity, wind speed and wind direction, particularly the determination of the behavior of capacitance as a function of environmental variables was so innovative and experimental, in order to obtain a mathematical model of line transmission of more realistic and dynamic, that can more precisely identify the electrical parameters under the influence of environmental variables, such work is developed this model, which will be fed with real environmental and electrical data, it made the study of the harmonic decomposition of current leakage, and the comparison with results of other existing models, are still held, virtual simulations of failures, which bought the efficiency and limitations of the model, and suggest a way of monitoring in real time and low cost.