Interpreting the Value of Flexibility in AC Security-Constrained Transmission Expansion Planning via a Cooperative Game Framework
arxiv(2023)
摘要
Security-constrained transmission expansion planning (SCTEP) is an inherently
complex problem that requires simultaneously solving multiple contingency
states of the system (usually corresponding to N-1 security criterion).
Existing studies focus on effectively finding optimal solutions; however,
single optimal solutions are not sufficient to interpret the value of
flexibility (e.g., from energy storage systems) and support system planners in
well-informed decision making. In view of planning uncertainties, it is
necessary to estimate the contributions of flexibility to various objectives
and prioritise the most effective investments. In this regard, this work
introduces a SCTEP tool that enables interpreting the value of flexibility in
terms of contributions to avoided load curtailment and total expected system
cost reduction. Inspired by cooperative game theory, the tool ranks the
contributions of flexibility providers and compares them against traditional
line reinforcements. This information can be used by system planners to
prioritise investments with higher contributions and synergistic capabilities.
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