Phase-Shifted Energy Balance Control for Multilevel Inverters in Grid-Connected PV Systems

Cascaded multilevel converters are promising candidates for grid-connected PV systems, but low-frequency ripples may exist in a DC link. Such not just inherent; they can occur due to environmental factors, such as variations certain range of irradiance the PV. To address this issue, article proposes clock phase-shifted (CPS) energy balance control method cascaded inverters photovoltaic (PV) systems. The proposed scheme prevent ripple link propagating power grid. Furthermore, it is feasible principle and no adjustment parameters needed. simulation experimental results verify effectiveness feasibility approach.