Load frequency control in variable inertia systems

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Conventional load frequency control primarily relies on large synchronous generation units to ensure regulation of the system frequency. However, its performance deteriorates as the system parameters, including inertia and droop coefficients, deviate from original system design. This letter proposes an augmented load frequency control (ALFC) to ensure robust frequency regulation under diurnal variations in system parameters that are expected in the future, renewables-rich power system. The superior performance of ALFC is demonstrated by several case studies, and its stability is assessed by small-signal analysis.
Original languageEnglish
Number of pages3
JournalIEEE Transactions on Power Systems
Early online date6 Aug 2020
Publication statusE-pub ahead of print - 6 Aug 2020


  • converter
  • inertia
  • load frequency control

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