In the ever-evolving landscape of energy distribution, a groundbreaking study has emerged that could redefine how we integrate energy storage systems into low-voltage distribution stations. Published in the English-language journal “IEEE Access,” the research introduces a novel topology and robust power flow control strategy, promising to enhance the efficiency and reliability of grid-forming energy storage systems.
At the heart of this innovation is Shuang Zheng, a researcher from the State Grid Jibei Electric Power Company Ltd. Tangshan Power Supply Company in Tangshan, China. Zheng and his team have developed a high-power density flexible interconnection topology that includes a three-phase parallel converter, three single-phase series converters, and a multiple-active-bridge (MAB) converter. This configuration allows all DC ports of converters, energy storage, and PV panels to be coupled through the MAB converter, eliminating the need for series transformers and significantly improving power density.
“The proposed topology not only simplifies the system but also enhances its robustness and efficiency,” Zheng explained. “By avoiding the use of series transformers, we can achieve a more compact and cost-effective design, which is crucial for low-voltage distribution stations.”
The study also introduces a robust power flow control strategy that models and analyzes the power flow within the interconnection station. By reconstructing the series converter and line impedance system and adding a state variable with integral action, the researchers designed a control law to suppress unknown disturbances effectively.
“This control strategy ensures stable and reliable power flow, even in the presence of uncertainties and disturbances,” Zheng noted. “It’s a significant step forward in making grid-forming energy storage systems more resilient and adaptable.”
The implications of this research for the energy sector are substantial. As the demand for renewable energy integration grows, the need for efficient and reliable energy storage solutions becomes increasingly critical. The proposed topology and control strategy offer a promising solution for low-voltage distribution stations, enabling better management of power flow and enhancing the overall stability of the grid.
“This research has the potential to shape the future of energy distribution,” said an industry expert familiar with the study. “By improving the integration of energy storage systems, we can enhance the flexibility and resilience of the grid, paving the way for a more sustainable energy future.”
As the energy sector continues to evolve, innovations like those presented in this study will play a pivotal role in shaping the future of power distribution. With the publication of this research in “IEEE Access,” the stage is set for further advancements in grid-forming energy storage and robust power flow control, ultimately benefiting both energy providers and consumers alike.