In the dynamic world of renewable energy, wind power plants (WPPs) are increasingly being called upon to support power systems during critical moments of instability. A groundbreaking study led by Zhengyang Hu, from the School of Electrical Engineering at Southeast University in Nanjing, China, has unveiled a novel strategy that could revolutionize how wind turbines contribute to grid stability. The research, published in the Chinese Society for Electrical Engineering Journal of Power and Energy Systems, delves into the often-overlooked potential of wind turbines operating under derated conditions.
Traditionally, WPPs have been tasked with providing temporary frequency support during power shortages, but their capabilities in this area have been limited, particularly when turbines are not operating at full capacity. Hu’s research addresses this gap by proposing a bi-level optimized temporary frequency support (OTFS) strategy. This approach not only enhances the frequency support capabilities of individual wind turbines but also coordinates multiple turbines to work in harmony, minimizing the impact of frequency drops.
At the heart of this strategy is a dynamic power control approach developed for wind turbine controllers. This innovation allows turbines to release more kinetic energy without causing a secondary frequency drop, a significant advancement in the field. “By synergizing the temporary frequency support of wind turbines with the secondary frequency control of synchronous generators, we can achieve a more stable and efficient power system,” Hu explains.
The second layer of the OTFS strategy involves a model predictive control system for the WPP controller. This system ensures that multiple wind turbines operating within an expanded stable region are coordinated to minimize the magnitude of frequency drops. The result is a more resilient power grid that can better withstand contingencies involving significant power shortages.
The implications of this research are far-reaching. As the energy sector continues to shift towards renewable sources, the ability of wind power plants to provide reliable frequency support will become increasingly crucial. Hu’s findings could pave the way for more efficient and stable integration of wind energy into power grids, reducing the reliance on traditional fossil fuel-based backup systems.
The study’s validation through comprehensive case studies on a real-time simulation platform adds a layer of credibility to the proposed strategy. The results demonstrate the potential for significant improvements in grid stability and efficiency, which could have substantial commercial impacts. Energy providers could see reduced costs associated with frequency control and improved reliability, ultimately benefiting consumers and the environment.
As the energy sector continues to evolve, research like Hu’s will be instrumental in shaping future developments. By optimizing the frequency support capabilities of wind power plants, we move closer to a more sustainable and resilient energy future. The publication of this research in the Chinese Society for Electrical Engineering Journal of Power and Energy Systems underscores its significance and potential impact on the global energy landscape.
