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A review of the state of the art of UFLS schemes for isolated power systems

L. Sigrist, L. Rouco, F.M. Echavarren

This paper presents a review of the state of the art of UFLS schemes for isolated power systems. Isolated power systems are especially sensitive to power imbalances and underfrequency load-shedding (UFLS) schemes are crucial to avoid frequency instability. UFLS schemes can be grouped into manual and automatic schemes, where the former are used for frequency restoration and the latter to arrest frequency decay. Automatic schemes can be further divided into conventional and advanced schemes. This paper focuses on the review of the design methods of conventional UFLS schemes as well as the review of architecture and functionalities of advanced schemes. The paper further discusses the main findings and trends.


Keywords: Power system protection; Conventional load shedding; Adaptive load shedding


International Journal of Electrical Power & Energy Systems. Volumen: 99 Páginas: 525-539

Journal Impact Factor: JCR impact factor 3.289 (2016)

DOI reference: DOI icon 10.1016/j.ijepes.2018.01.052    

Publicado en papel: Julio 2018. Publicado on-line: Febrero 2018.


    Líneas de investigación:
  • *Estabilidad: estabilidad de gran perturbación, ajuste de protecciones de deslastre de cargas por frecuencia, control de la excitación, estabilidad de pequeña perturbación, ajuste de estabilizadores del sistema de potencia, identificación de modelos de reguladores

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