10th IEEE PES/IAS Power Africa Conference - PAC 2023, Marrakech (Morocco). 06-10 November 2023
Summary:
A frequency constrained unit commitment (FCUC) formulates the non-linear, non-convex frequency dynamics to obtain the generation dispatch of island power systems (IPSs). Even with FCUC, under frequency load shedding (UFLS) is inevitable for sufficiently large contingencies. The objective of this paper is to assess how generation dispatches obtained by FCUC affect and change optimal settings of UFLS schemes and the associated dynamic performance. By using a real-world Spanish island, the UFLS scheme is optimally tuned for both the standard unit commitment (STUC) and the FCUC. The dynamic performance of both UFLS schemes are compared in terms of average shed load and frequency nadir values after each generator outage. Results show that FCUC increases the IPS cost by 10.8%, but the improvement in the dynamic frequency response is not fully exploited unless the UFLS scheme settings are re-tuned for the new optimal dispatch.
Spanish layman's summary:
Este artículo analiza como un despacho optimo de generación con restriccines de frecuencia afectan y cambian el ajuste óptimo de los esquemas de deslastre de cargas en un sistema insular.
English layman's summary:
This paper assesses how generation dispatches obtained by frequency constrained unit commitments (FCUC) affect and change optimal settings of UFLS schemes and the associated dynamic performance.
Keywords: island power systems, load shedding, unit commitment, frequency stability
DOI: 
https://doi.org/10.1109/PowerAfrica57932.2023.10363303
Published in IEEE PES/IAS PowerAfrica 2023, pp: 1-5, ISBN: 979-8-3503-3756-3
Publication date: 2023-12-22.
Citation:
E. Lobato, L. Sigrist, M. Rajabdorri, I. Egido, Impact assessment of FCUC on optimal design of UFLS settings in Island Power Systems, 10th IEEE PES/IAS Power Africa Conference - PAC 2023, Marrakech (Morocco). 06-10 November 2023. In: IEEE PES/IAS PowerAfrica 2023: Conference proceedings, ISBN: 979-8-3503-3756-3
