NON ISOLATED BIDIRECTIONAL DC-DC CONVERTER FOR PV & EV

Fossil fuel is the primary source of energy in power-generating units of thermal power plants. More such units to meet increased load demand is harmful to the environment because of its induced effect on pollution and global warming. In the last decade, there has been a major shift towards generating green power using renewable energy sources across the globe as per different SDGs of the UN. Photovoltaic (PV) and wind turbine-based power generation hold the majority of the percentage of renewable energy adaptation. However, the intermittent nature of PV, and wind power which depends on sun irradiation and wind speed respectively makes power extraction from these sources difficult. Storage units are essential for these systems, especially with PV. Storage units are of low voltage and high current type. Series connection of multi storage units is not possible due to charge imbalance problem Generally, storage units (low-cost lead acid battery) are of 24V-48V DC system. PV panels also inherently generate low DC voltage which can’t be converted to single-phase RMS 230V AC voltage. Thus, a high gain single-stage boost converter is essential which can increase PV panel voltage to 300V-380V DC voltage so that by using an inverter single phase line voltage of 230V RMS can be generated. A similar system is required for the three-phase AC system. Therefore, the storage unit should be interfaced to 300V-380V constant DC link voltage.