Harmonic Analysis of Grid Connected Electric Vehicles with Residential Load for Different Filters

Complexity in distributed generation and transmission of electricity is increased in this era, as electrical vehicles are newer electric load introduced into the grid. For Vehicle to Grid or Grid to Vehicle, Voltage Source Converters are used. Switching of semiconductor switches in converters causes' harmonic in voltage and current waveforms, which drastically reduces the performance of the grid. In order to mitigate the harmonics in the grid, harmonic filters are introduced into the system. In this paper, harmonic analysis with L, LC and LCL filter design for two electric vehicles and home load appliances connected to grid is presented. L and LC filters were most widely used filters, but increasing demand of the grid creates more challenges in power superiority, subsequently the value of L increases that makes the system bulky and less cost-effective. LCL filter offers striking replacement for the configuration of L and LC filters. This approach is designed under MATLAB / Simulink software and the current and voltage waveform are presented for comparison.