Study on Characteristics of Electromagnetic Interference Caused by Metro Train Movement

Abstract With the rapid development of urban power grid and metro system, their mutual influence has become more serious. The dc magnetic bias transformer caused by becomes main research direction. In this paper, characteristics dynamic electromagnetic coupling between trains transmission lines are studied. First, motion equation is written out according to running law train, three relations given position train. calculation method induced voltage deduced. Then parallel length distance line on induction increases first then decreases with increase them. It proposed that a single train limited lines, but cannot be ignored when multiple simultaneously.