A novel energy management optimization strategy for integrated photovoltaic-storage LVDC systems using dynamic multi-mode switching under energy market-oriented conditions

Abstract

The shift toward market-oriented energy policies introduces challenges in maximizing renewable energy utilization and optimizing power trading revenue. Photovoltaic (PV)-Storage-integrated low-voltage direct current (LVDC) systems offer strong potential; however, conventional strategies often lack the flexibility to adapt to dynamic operating conditions. This paper proposes a dynamic multi-mode switching energy management strategy that enhances traditional coordination controls through energy storage protection, grid guarantee acquisition, and market positioning. A refined classification of operating modes enables seamless transitions among grid-connected, islanded, and hybrid modes, supporting adaptive scheduling and stable operation. The developed multi-mode switching strategy, based on dynamic coordinated energy management theory, ensures optimal energy management and facilitates seamless transitions between different operation modes—grid-connected, islanded, and hybrid—to balance power consumption and maximize system performance. A comprehensive analysis of the system’s operation and control modes was conducted, followed by a detailed comparison of green power consumption rates and revenue outcomes under various strategies. Simulation results indicate that the proposed strategy effectively maintains the storage system’s state of charge variation within 0–10%, thereby extending battery life and enhancing reliability. Renewable energy consumption increases by up to 30 percent, while green power revenue improves by up to 20%. These outcomes confirm the effectiveness of the proposed strategy in enhancing the performance and economic value of PV-storage LVDC systems in evolving energy market-oriented conditions.