Analysis of radiation characteristics of distribution line carriers with the NEC code

The use of a medium-voltage (MV) transmission network as a physical medium for communications with the distribution line carrier (DLC) technique may lead to electromagnetic compatibility problems. Computed and experimental results concerning the undesired electromagnetic fields radiated by the DLC are discussed. The NEC-2 code is used to model a network considered as a radiating structure in the 10-100-kHz band and to estimate the average values of undesired radiated electromagnetic fields. An appropriate NEC user interface has been developed on a Macintosh computer in order to model a realistic complex network. Results obtained with NEC are validated through comparisons of simulated fields with measured ones, and satisfactory agreement is found. A numerical parametric study shows the effects of the network configuration on the undesired radiated fields.<
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