Abstract
Recently, a modular multilevel converter (MMC) has been employed to feed the power generated by renewable sources into the grid because of its inherent advantages like modularity, scalability, and high-power quality. Moreover, the infusion of energy storage elements, like batteries, into the MMC can provide a smoother and more reliable operation. A battery-integrated MMC-based solar PV inverter is introduced in this paper. The objective of the proposed topology is to offer an inbuilt energy storage system for MMC-based topology, especially when the MMC is employed to process the power generated by renewable sources. As renewable sources are stochastic, an inbuilt energy storage system can provide a smoother operation to any renewable energy-based power plant. Moreover, this architecture ensures the battery is an integral part of the system. This battery storage requires battery balancing that could be provided by active battery balancing through the MMC sorting algorithm. Further, the main DC bus of MMC is utilized as an evacuation port for solar photovoltaic (PV) arrays or any other renewable energy source.
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