Cross-layer design for real-time grid operation: Estimation, optimization and power flow

Open access
Date
2022-11Type
- Journal Article
Abstract
In this paper, we propose a combined Online Feedback Optimization (OFO) and dynamic estimation approach for a real-time power grid operation under time-varying conditions. A dynamic estimation uses grid measurements to generate the information required by an OFO controller, that incrementally steers the controllable power injections set-points towards the solutions of a time-varying AC Optimal Power Flow (AC-OPF) problem. More concretely, we propose a quadratic programming-based OFO that guarantees satisfying the grid operational constraints, like admissible voltage limits. Within the estimation, we design an online power flow solver that efficiently computes power flow approximations in real time. Finally, we certify the stability and convergence of this combined approach under time-varying conditions, and we validate its effectiveness on a simulation with a test feeder and high resolution consumption data. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000561005Publication status
publishedExternal links
Journal / series
Electric Power Systems ResearchVolume
Pages / Article No.
Publisher
ElsevierSubject
AC optimal power flow; Dynamic state estimation; Online optimization; Power flow solver; Voltage regulationOrganisational unit
09478 - Dörfler, Florian / Dörfler, Florian
03751 - Lygeros, John / Lygeros, John
More
Show all metadata