Review of RoCoF Estimation Techniques for Low-Inertia Power Systems

Xiaoyu Deng, Ruo Mo, Pengliang Wang, Junru Chen, Dongliang Nan and Muyang Liu ()
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Xiaoyu Deng: School of Electrical Engineering, Xinjiang University, Urumqi 830046, China
Ruo Mo: School of Electrical Engineering, Xinjiang University, Urumqi 830046, China
Pengliang Wang: School of Electrical Engineering, Xinjiang University, Urumqi 830046, China
Junru Chen: School of Electrical Engineering, Xinjiang University, Urumqi 830046, China
Dongliang Nan: Electric Power Research Institute, State Grid Xinjiang Electric Power Co., Ltd., Urumqi 830011, China
Muyang Liu: School of Electrical Engineering, Xinjiang University, Urumqi 830046, China

Energies, 2023, vol. 16, issue 9, 1-19

Abstract: As the traditional generation is gradually replaced by inverter-based resources, a lack of rotational inertia is now a common issue of modern power systems, which leads to an increasingly larger rate of change of frequency (RoCoF) following contingencies and may result in frequency collapse. As a crucial index of the frequency security and stability of power systems, the accurate estimation of the RoCoF can be a foundation for the development of advanced operations and control techniques of the future power system. This paper firstly analyzes the role of the RoCoF in typical blackouts occurring in recent years and discusses the physical and numerical nature of the RoCoF; then, by introducing the frequency spatial distribution of the power system, the paper discusses the concept of the “center” RoCoF that can present the frequency security and stability of the entire system. The estimation and prediction techniques of the maximal power system RoCoF following a contingency and the existing real-time tracking techniques of the power system RoCoF are comprehensively reviewed. Finally, the open questions and related research topics of the RoCoF estimation are discussed.

Keywords: frequency stability; rate of change of frequency (RoCoF); power system stability; phasor measurement unit (PMU) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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