15th IEEE PowerTech Conference - PowerTech 2023, Belgrade (Serbia). 25-29 June 2023
Summary:
Increasing penetration of renewable energy resources (RES) affects stability and, in particular, frequency stability of island power systems like the Canary Islands. System protection involves underfrequency load shedding (UFLS) as a last resort tool. The objective of this paper is to tune the parameters of a UFLS scheme based on the frequency stability margin (FSM) and compare its performance with conventional UFLS schemes. The performance is assessed by simulating the outage of generating units of a real isolated Spanish power system. The results of this study demonstrate that the introduction of the FSM in the UFLS scheme contributes to a significant improvement in its performance. The load shedding is delayed for moderate rate of change of frequency (ROCOF) values, and the amount of disconnected load is reduced.
Keywords: Island power systems, frequency stability, underfrequency load shedding.
DOI: 
https://doi.org/10.1109/PowerTech55446.2023.10202842
Published in 2023 IEEE Belgrade PowerTech, pp: 1-6, ISBN: 978-1-6654-8779-5
Publication date: 2023-06-29.
Citation:
M. Vadillo, L. Sigrist, U. Rudez, Design and comparison of UFLS schemes of isolated power systems based on frequency stability margin, 15th IEEE PowerTech Conference - PowerTech 2023, Belgrade (Serbia). 25-29 June 2023. In: 2023 IEEE Belgrade PowerTech: Conference proceedings, ISBN: 978-1-6654-8779-5
