A Transformer Less Bi-directional Converter With P-Q Control Scheme for BESS, V2G and G2V Applications in Single Phase Utilities

Many developing countries are now facing the problem of managing the peak demand deficit. Renewable energy resources are the best solution for this problem. Power storage devices like batteries can act as another viable solution for this by off-peak charging and peak time discharging. Efficient bidirectional converters are essential requirement for proper operation of the system. For economics, efficient and for easy applications, light weight transformer less converters exhibit superior performance over the conventional types. The work discussed below presents design and analysis of a transformer less bidirectional converter with dual power (P & Q) control scheme. The operation of this converter is controlled based on the corresponding current signal generated by the P-Q control. The proposed prototype finds its application in Battery Energy Storage System (BESS), Vehicle 2 Grid & Grid 2 Vehicle applications, where portability and efficiency are most important. Simulations are performed using Matlab.