This paper proposes a formal verification strategy of grid frequency control using reachability analysis. Reachability analysis calculates reachable sets, which are all possible evolution of system states, or output variables, given a bounded input uncertainty. Contrary to classical grid frequency control schemes that are generally tuned based on multiple simulations, reachability analysis provides a formal guarantee for the performance of the controller in one computation stage. The proposed method is applied on the IEEE 9-Bus system. The accuracy of reachable sets is validated by simulation results with randomized inputs. In addition, the paper analyses the effect of control parameters and input uncertainties on the reachable sets. Thus, the operator can verify if their tuned frequency controller could violate any mandated grid directives without performing large number of simulations.
|Title of host publication
|Proceedings of 2021 IEEE PES Innovative Smart Grid Technologies Europe : Smart Grids: Toward a Carbon-Free Future, ISGT Europe 2021
|Institute of Electrical and Electronics Engineers Inc.
|Published - 2021
|11th IEEE PES Innovative Smart Grid Technologies Europe, ISGT Europe 2021 - Espoo, Finland
Duration: 18 Oct 2021 → 21 Oct 2021
|11th IEEE PES Innovative Smart Grid Technologies Europe, ISGT Europe 2021
|18/10/2021 → 21/10/2021
|IEEE Power and Energy Society
|Proceedings of 2021 IEEE PES Innovative Smart Grid Technologies Europe: Smart Grids: Toward a Carbon-Free Future, ISGT Europe 2021
- formal verification
- frequency control
- load uncertainty
- reachability analysis
- Reachable sets