Study and Power Flow Management of DC Bus for Household Loads

This paper proposes the technique to standardize 48V DC power line for homes and offices, energy storage systems (ESSs) are also integrated with solar photovoltaic (SPV) sources to control the effect of intermittency and periodicity. Battery acts as an energy buffer when SPV system could not meet the requirement of load demand. It is well known that SPV provides DC power and stores in ESS, so both of them are integrated to the DC bus. With the help of power electronics step down converter, the 48V DC bus is stepped- down to 24V which is used to power the low voltage devices like laptop, desktop, LEDs and TVs. As some appliances works on AC input, thus, with the help of power inverter 48V DC boosted up to 230V AC to meet the required voltage level. This paper further explains the model in Simulink which consists SPV array system with battery energy storage device. The DC bus uses DC-DC converter, an inverter and a bidirectional converter for charging/discharging of ESS. A Maltab/Simulink platform is used to validate the feasibility of 48V DC power line with ESS under varying irradiances.