Improved characterization for AC-feasible power transfer regions of virtual power plants
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AbstractAggregating distributed energy resources as virtual power plants (VPPs) to participate in transmission-level operations is a promising direction for future grids. However, it is challenging to decide the AC-feasible power transfer region of such a VPP at its point of common coupling with the transmission. This paper proposes an improved method to characterize this region. The proposed method constructs linear constraints to inner-approximate the AC-feasible power transfer regions, by applying Brouwer’s fixed-point theorem to the second-order Taylor expansion of the nonlinear Dist-flow equations. An exploration strategy is proposed to further improve our characterization flexibility. Finally, a transmission-level operation problem with VPP participation is formulated and solved through big-M linearization. The proposed methods are verified by numerical experiments on the IEEE 33-bus and 136-bus test systems.
Acceptance Date16/05/2023
All Author(s) ListWei Lin, Changhong Zhao
Journal nameInternational Journal of Electrical Power & Energy Systems
Volume Number152
Article number109260
Pages1 - 11
LanguagesEnglish-United States

Last updated on 2024-16-04 at 00:32