A fuzzy logic system for calculation of the interference of overhead transmission lines on buried pipelines

The influence of a faulted electrical power transmission line on a buried pipeline is investigated. A calculation tool is suggested. Finite element solutions of field equations are used combined with artificial intelligence methods. The electromagnetic field depends on several parameters, such as the position of the phase conductors, the currents flowing through the conducting materials and the resistivity of the earth. A fuzzy logic system was used to simulate the problem. It was trained using data derived from finite element method (FEM) calculations for different configuration cases (training set) of the above electromagnetic field problem. After the training, the system was tested for several configuration cases, differing significantly from the training cases with satisfactory results. It is shown that the proposed method is very time efficient and accurate in calculating the electromagnetic fields compared to the time straining finite element method. An important feature of the fuzzy logic system is that it consists of a varying rule base and is trained using genetic algorithms. In order to create the rule base for the fuzzy logic system a special operation is used at the beginning of the training. Afterwards, the training of the system is achieved with the use of a genetic algorithm (CA) that implements some special operators. (C) 2001 Elsevier Science B.V. All rights reserved.