2009 Volume 50 Issue 3 Pages 158-161
In order to identify the characteristics of radio noise emitted from the operation of electric railway systems and evaluate the effects of countermeasures to reduce it, time- and cost-intensive measuring tests are currently necessary. To reduce the amount of time and the costs involved, our institute started a study in 2005 to establish a method of calculating the strength of noise radiated from electric railway systems. As a result of this study, a basic method of determining trends in fluctuations of the strength of radio noise emitted from running electric vehicles has been developed using the moment method. This paper outlines the characteristics of radio noise emitted from electric railway systems and reports on the results of a basic study to establish the calculation method.