In the rapidly evolving world of power conversion and energy storage, a new study published in the journal *Energies* (formerly known as Energies) is making waves. Researchers have developed an innovative control strategy that could significantly enhance the efficiency of modular multilevel converters (MMCs) integrated with battery storage systems. This breakthrough, led by Marzio Barresi from the Department of Electronics, Information, and Bioengineering at Politecnico di Milano, holds promising implications for the energy sector, particularly in distributed energy storage integration.
MMCs are already widely used in power conversion applications due to their scalability, high efficiency, and reduced harmonic distortion. However, integrating battery storage systems into MMC submodules using dual active bridge (DAB) converters has presented challenges. Voltage fluctuations due to the battery’s state of charge can compromise the zero-voltage switching (ZVS) operation of a DAB, leading to increased reactive power circulation, higher losses, and reduced system performance.
Barresi and his team addressed these challenges by investigating an active control strategy for submodule voltage regulation in MMCs with DAB-based battery integration. “Our goal was to optimize the efficiency of these systems, especially at low power levels,” Barresi explained. The researchers evaluated two control strategies under single-phase-shift modulation. The first strategy regulated the DAB voltage on one side to match the battery voltage on the other, scaled by the high-frequency transformer turns ratio. This approach facilitated ZVS operation and reduced reactive power. The second strategy optimized the voltage to minimize total power-conversion losses.
The results were impressive. The proposed control strategies improved efficiency by several percentage points compared to maintaining a constant voltage, particularly at low power levels. This enhancement could have significant commercial impacts, making energy storage systems more efficient and cost-effective.
The study’s findings are particularly relevant for the energy sector, where the integration of battery storage systems with power conversion technologies is becoming increasingly important. As the demand for renewable energy sources grows, the need for efficient and reliable energy storage solutions becomes ever more critical. This research could shape future developments in the field, paving the way for more advanced and efficient power conversion and storage systems.
Barresi’s work not only addresses current challenges but also opens up new possibilities for innovation. As the energy sector continues to evolve, such breakthroughs will be crucial in meeting the demands of a sustainable and efficient energy future. The study’s publication in *Energies* underscores its significance and potential impact on the industry.