As the world grapples with the urgent need to transition to renewable energy, the challenges posed by the inherent volatility of sources like solar power cannot be overlooked. A significant breakthrough in this area has emerged from research conducted by Shaobo Yang at the Research Institute of Electric Power Science, part of the State Grid Hebei Electric Power Co. in China. In a recent article published in the journal ‘Energies,’ Yang and his team propose a sophisticated control strategy aimed at smoothing power fluctuations at distribution network substations, particularly those integrating distributed photovoltaic (PV) systems.
The rapid expansion of the distributed PV industry, driven by global dual carbon targets, has led to an increasing integration of solar energy into power grids. However, this shift brings with it a host of challenges. “The randomness and volatility of distributed energy sources can significantly disrupt the stability of the power system,” Yang explained. His research addresses this critical issue by tapping into the regulation potential of feeder loads, energy storage systems, and distributed PV resources.
The proposed strategy operates on two distinct time scales. In the day-ahead phase, traditional voltage regulation devices such as on-load tap changers (OLTCs) and capacitor banks (CBs) are pre-dispatched based on forecasts of energy supply and demand. This proactive approach minimizes equipment adjustments while optimizing substation power values, effectively smoothing out fluctuations before they occur. “By coordinating these devices, we can significantly enhance the operational stability of substations,” Yang noted.
During the intraday phase, the strategy utilizes faster regulation devices like photovoltaic inverters and static var compensators (SVCs) to closely track real-time substation trends. This dual-layered approach not only reduces potential solar energy curtailment but also bolsters the economic efficiency of distribution networks. The research demonstrates that by optimizing the regulation of adjustable resources, substations can maintain a more stable output, thereby improving the overall reliability of the grid.
The implications of this research are profound for the energy sector. As more distributed PV systems come online, the ability to manage their fluctuations could mean the difference between a resilient power grid and one that is susceptible to outages and instability. Yang emphasizes the importance of these advancements, stating, “Our work paves the way for a more integrated and responsive energy system that can better accommodate the growing role of renewable sources.”
For energy companies and grid operators, this research signals a shift towards more sophisticated, data-driven control mechanisms that can enhance the viability of renewable energy integration. The findings not only contribute to the scientific understanding of power systems but also offer practical solutions that can be implemented in real-world scenarios, potentially leading to significant cost savings and improved service reliability.
As the energy sector continues to evolve, strategies like those proposed by Yang will be crucial in shaping a sustainable future. The ability to effectively manage power fluctuations will not only support the increasing penetration of renewable energy but also align with global efforts to mitigate climate change.
For further insights into this groundbreaking research, visit the Research Institute of Electric Power Science.
