The Role of Extended Horizon Methodology in Renewable-Dense Grids With Inter-Day Long-Duration Energy Storage
arxiv(2024)
摘要
This study addresses the challenges in optimizing long-duration energy
storage (LDES) dispatch within future power systems featuring high integration
of variable renewable energy (VRE). The research focuses on conducting a
comparative analysis between traditional and extended horizon methods for the
optimization of LDES dispatch, using open-source and commercial production cost
models (PCMs), tested on a futuristic Electric Reliability Council of Texas
(ERCOT) grid. The findings indicate that, despite its complexity and longer
solution times, the extended horizon approach demonstrates superior performance
in LDES dispatch and effectively reduces the impact of degenerate solutions in
sequential simulations. This study underscores the trade-offs between
computational efficiency and improvement in storage dispatch, which is crucial
for future energy systems. The analysis highlights the necessity of addressing
the degeneracy issue in storage dispatch in grids dominated by zero operating
cost VRE generators and low operating cost energy storage devices.
Additionally, the research reveals revenue discrepancies for LDES operators
across different models, a consequence of the persistent presence of degeneracy
in high VRE systems. These findings suggest an urgent need for refined modeling
techniques in the planning and operation of future energy systems.
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