In a significant stride towards bolstering wind energy technology, researchers have developed a novel dual-rotor machine system for wind turbines, addressing the growing challenge of power grid support. The study, led by Yanan Li from the Maritime College at Tianjin University of Technology, introduces a unique modeling approach and control strategy that could enhance the efficiency and grid compatibility of wind power generation.
The research, published in the journal *Nature Scientific Reports* (formerly known as *Scientific Reports*), tackles the issue of insufficient power grid support, particularly for larger wind turbines. The team proposes a dual-rotor machine integrated with a gearbox and synchronous generator, serving as a front-end speed control system. This setup eliminates the need for a converter to connect electricity to the grid, making dual-rotor wind power generation more grid-friendly.
Li explains, “Given the unique construction of the dual-rotor machine in this proposed system, the conventional mathematical model is no longer suitable for representing such machinery.” To address this, the researchers developed a mathematical model for the inner rotor using a “rotating relative coordinate system” and a “relative stationary coordinate system.” This model forms the basis for the dual-rotor system’s overall mathematical representation.
The study’s simulations, conducted using MATLAB, validated the viability of the unique mathematical model and demonstrated the power generation efficiency of the two-rotor wind turbine system. This approach underscores the potential of dual-rotor technology in advancing wind energy, particularly for maritime applications where space and grid integration can be challenging.
For the maritime sector, this innovation presents several opportunities. Offshore wind farms, which are increasingly important for renewable energy generation, could benefit from the enhanced efficiency and grid compatibility offered by dual-rotor systems. The technology could also be integrated into maritime vessels, such as wind-assisted cargo ships, to reduce fuel consumption and emissions.
Moreover, the control strategy developed in this study could improve the reliability and performance of wind turbines in harsh maritime environments. This could lead to more widespread adoption of wind energy solutions in the maritime industry, contributing to sustainability goals and reducing carbon footprints.
As the world continues to seek clean and renewable energy sources, advancements like the dual-rotor machine system offer promising solutions. The research by Li and their team highlights the importance of innovative modeling and control strategies in overcoming the challenges of integrating wind energy into the power grid, particularly in the maritime sector.