As the world increasingly turns to renewable energy sources, wind power has emerged as a critical player in the quest for sustainable electricity generation. However, with the rapid integration of wind energy into regional power grids, challenges related to frequency stability have surfaced, primarily due to the diminishing system inertia. A groundbreaking study led by Changjiang Sun from Power China Huadong Engineering Corporation Ltd. proposes a novel solution to enhance the inertial frequency response of doubly-fed induction generator-based wind turbines (DFIG-WTs).
In the paper published in IEEE Access, Sun and his team introduce a rotational reference frame (RRF) control method that significantly improves the ability of DFIG-WTs to respond to frequency deviations. “By introducing an anti-frequency-deviation phase delay into the phase angle measured by the phase-locked loop, we can rotate the dq-RRF of the control system in such a way that it mimics the behavior of a synchronous generator,” Sun explains. This innovative approach not only strengthens the stability of the system but also enhances its robustness against variations in control parameters.
The implications of this research are profound for the energy sector. As wind power continues to gain traction, ensuring the reliability of power grids becomes paramount. The RRF controller demonstrated in the study shows promise in providing more effective inertial support compared to traditional synthetic inertia control (SIC) methods. “Our findings indicate that the RRF controller offers a simpler structure while delivering a stronger response to frequency drops,” Sun adds, highlighting the potential for more resilient energy systems.
The research involved comprehensive simulation studies and hardware-in-the-loop experiments, which confirmed the controller’s effectiveness in managing frequency and active power response. As more countries aim to increase their renewable energy portfolios, technologies like the RRF control method could play a crucial role in stabilizing power grids, ensuring that the transition to green energy does not compromise reliability.
This work not only pushes the boundaries of current wind turbine technology but also sets the stage for future developments in energy management systems. With the growing urgency to address climate change and enhance energy security, such advancements are essential. As Changjiang Sun and his colleagues pave the way for more robust wind energy solutions, the energy sector stands to benefit significantly, potentially reshaping how we harness and distribute renewable energy.
For more insights from Changjiang Sun and his team, you can visit Power China Huadong Engineering Corporation Ltd..
