The present work is devoted to research the influence of impulse noise on data transmission in computer networks employing Power Line Communication (PLC) technology. Electrical interference in such networks is regarded as a kind of solar interference. In this interpretation, the source of interference (an analogue of the Sun) is on the same axis with the Sender-Receiver communication line. This approach is described by a model in which the source of impulse noise is expedient to locate close to the PLC equipment. In this case, noisy sub-carriers of the Sender (an analogue of Satellite) will be excluded from the transmitted signal. The correctness of the proposed approach is tested and confirmed by the network modeling in MatLab / Simulink package.