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Joint reserve allocation and risk scheduling considering multi-region frequency security in high-penetration renewable energy systems
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DOI：10.1016/j.epsr.2026.113002.png)
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Abstract
En 中文
The carbon neutrality target has promoted large-scale centralized integration of renewable energy into power grids. The spatial disparity of power sources exacerbates the spatiotemporal imbalance of system inertia distribution, making the conventional scheduling approach based on the center of inertia (COI) assumption inadequate for meeting frequency security requirements. This paper proposes a two-stage risk scheduling model considering multi-area frequency dynamic security and wind power uncertainty. First, wind curtailment and load shedding risks are quantified based on conditional value-at-risk (CVaR), and the acceptable wind power absorption domain (AWAD) formula is derived accordingly. Then, linearized analytical expressions of frequency security constraints for disturbed and non-disturbed regions are derived. Subsequently, reserve capacity is decoupled into conventional reserves and frequency regulation reserves to address wind power fluctuations and support frequency regulation. Finally, the two-stage optimization problem is solved using the column-and-constraint generation (C&CG) algorithm. Case studies demonstrate that the proposed strategy achieves only a 0.56% increase in total cost compared to the conventional COI model while significantly improving frequency security, and enhances inter-area tie-line power transfer, providing an effective solution for cross-regional frequency regulation resource sharing.
Keywords:
Multi-region frequency security
Reserve allocation
Risk scheduling
The acceptable wind power absorption domain
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