Common-Mode Current Propagation in Power Line Communication Networks Using Multi-Conductor Transmission Line Theory

This paper proposes a new approach to model the common-mode (CM) current propagation path of electrical power line cable for broadband power line communications (PLC). In this approach, a CM current propagation model for a three-wire power line cable is developed using the Multi-conductor Transmission Line (MTL) theory. The model is used to study the electromagnetic interference (EMI) radiation mechanism from the PLC network. The accuracy of the model is verified through numerical simulations and practical measurements conducted on the actual power line network. The developed model allows us to predict the CM current in the power line cable with reasonable accuracy.