Enhanced Energy Harvesting and Efficient Power Management for Grid-Connected DC Microgrid Using Landsman Converter and Modified MPPT

This study introduces a new method for optimizing energy harvesting and power management through the use of a Landsman converter. This system is based on the Modified Incremental Conductance (InC) based Maximum Power Point Tracking (MPPT) algorithm, which maximizes energy recovery from renewable sources, particularly photovoltaic (PV) systems. The integration of a bidirectional DC-DC converter establishes a key link between the PV system and the battery, ensuring that the PV panels produce the maximum voltage. This design not only maximizes energy capture, but also assures a steady power supply despite fluctuations in solar energy availability. To improve operating efficiency, a Pulse Width Modulation (PWM) generator is coupled to the Landsman converter, allowing for precise control of power flow within the system. Proportional-Integral (PI) controllers closely monitor the operation of both the battery and the grid interface, resulting in smooth energy distribution. In addition, a three-phase voltage source inverter (VSI) is utilized to convert DC to AC, which is subsequently filtered with an LC filter before being fed into the grid. The proposed design has been thoroughly evaluated, and simulation results provided on the MATLAB platform show a reduction in Total Harmonic Distortion (THD) of 1.68%. This comprehensive approach not only encourages renewable energy use but also ensures constant power delivery, thereby boosting the resilience and efficiency of present energy systems.