An Approach to Mitigate the EMI Noise Effect in Vehicle-to-Grid (V2G) System

Today, Smart Grid (SG) is an intelligent and effective way of having endless growth and development possibilities. On the other side, Vehicle-to-Grid (V2G) is also gaining importance due to its attractive features like transferring bi-directional power using the power electronic converters between Electric Vehicles (EVs) and grid, regulating grid voltage/frequency etc. This V2G concept offers benefits to users, utilities, economics and also the environment but in spite of all this, it also needs further insight related to the Electromagnetic Interference (EMI) issues, due to the presence of bi-directional power flow converters, which are left unattended. In order to be competitive in present times the EMI noise signal, which is presented in the actual signal and energy efficiency characteristics should be focused smartly. The present electrical technology is dominated by the converters, which are based on power electronics, so this paper proposes a Wavelet Transform (WT) based time frequency localized approach for EMI noise mitigation in V2G systems. The effectiveness of the proposed method is evaluated in terms of Signal-to-Noise Ratio (SNR) and the investigation is mainly focused on harmonics and the conducted EMI suppression.