In a significant advancement for the energy sector, researchers have proposed a novel energy management strategy (EMS) for microgrids that integrates renewable energy sources and hybrid energy storage systems (HESS). This innovative approach addresses the critical challenge of forecast errors associated with photovoltaic (PV) energy generation and load demands, which can undermine the economic viability of these systems.
Lead author Kaikai Zhang, affiliated with the Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education at Shandong University in Ji’nan, China, emphasizes the importance of this research. “Our strategy not only stabilizes energy generation from renewables but also optimizes the economic benefits by mitigating the impacts of forecast errors,” Zhang stated.
The study introduces an optimization model that takes into account the depreciation costs of batteries, a crucial factor in the long-term sustainability of energy storage solutions. By implementing a day-ahead EMS that operates under various scenarios—balancing minimum fluctuations with optimal economic performance—the researchers lay the groundwork for a more resilient energy infrastructure.
One of the standout features of this research is the development of an intraday rolling energy management strategy (REMS). This strategy adapts in real time to forecast results and operational feedback, effectively reducing the adverse effects of forecast inaccuracies. Zhang noted, “By incorporating real-time data, we can dynamically adjust our energy management tactics, which is vital for maintaining system efficiency and reliability.”
Moreover, the introduction of the real-time state of charge (SOC) of supercapacitors into the management model enhances the adjustment process. This innovation prevents supercapacitors from operating in charge/discharge restricted zones for extended periods, which can degrade performance and efficiency. The findings from case analyses demonstrate that the proposed REMS significantly lessens the impact of forecast errors, thereby promoting a more stable and economically sound microgrid operation.
As the energy sector increasingly pivots toward renewable sources, this research has far-reaching implications. It not only fosters a more reliable energy supply but also enhances the financial viability of renewable energy projects. By improving energy management strategies, stakeholders can expect better integration of renewables into the grid, ultimately leading to reduced costs for consumers and more sustainable energy practices.
This groundbreaking work was published in the ‘International Journal of Electrical Power & Energy Systems’, showcasing the potential for innovative solutions in the face of growing energy demands and environmental concerns. For more information about the lead author’s work, you can visit Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education, Shandong University.
