Power stations with integrated energy storage should be set up and operate in ways that optimise the flow of energy between generation and storage.
A recent study from Shanghai Investigation Design and Research Institute explores how different systems maximise this efficiency and reliability, and thus economically viability.
By incorporating energy storage systems, integrated energy power stations can better handle the intermittency and unpredictability of renewable energy sources, leading to more stable and profitable operations.
Renewable energy sources are incredibly promising, but they come with challenges. The sun doesn’t always shine, and the wind doesn’t always blow, making power supply unpredictable. This variability can lead to inefficiencies and higher costs. However, energy storage systems (ESS) like batteries can store excess energy when production is high and release it when production is low, smoothing out these fluctuations.
But not all energy storage solutions are created equal. Managing these systems effectively to maximize their benefits and lifespan is key. This is where the new research comes into play.
Innovative Models for Better Energy Management
Researchers have developed sophisticated models to optimize the configuration and operation of power stations that combine wind, solar (PV), and energy storage. These models focus on balancing the costs and benefits to achieve the best performance.
The study analysed various factors, including the initial costs of setting up these systems, the operational and maintenance costs, and the degradation costs associated with the energy storage devices. It also considered potential revenues from selling energy and providing ancillary services to the grid, like frequency regulation.
By using a two-stage optimization model, the researchers could determine the most efficient way to configure these integrated power stations. This model takes into account both the energy production capabilities and the lifespan of the storage systems, ensuring that the stations operate at peak efficiency while extending the life of their components.
Real-World Impact and Economic Benefits
One of the most significant findings is that optimizing the charging and discharging strategies of the storage systems can significantly extend their lifespan—from an average of 4.93 years to an impressive 7.79 years. This extension not only improves the return on investment by 2.4% but also makes the whole system more sustainable and cost-effective.
The study’s models were tested in a power station in Northwest China, demonstrating their practical applicability. The results were impressive: integrating energy storage with AI-driven optimisation not only smoothed out power fluctuations but also enhanced the overall economic performance of the station.
Source
Configuration and operation model for integrated energy power station considering energy storage, IET Power Generation, 2024-06-29
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