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arXiv · 2503.11040

Evaluation of the Impact of IBR on the Frequency Dynamics in the Brazilian Power System

Bruno Pinheiro·M. C. Llerena Velasquez·Giovane Faria·A. F. C. Aquino·Diego Issicaba·Daniel Dotta
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Abstract

In this paper, the impact of inverter-based resources (IBRs) on the frequency dynamics of the Brazilian Interconnected Power System (BIPS) is evaluated. A measurement-based framework is proposed to assess the impact of IBR penetration on the system-wide and regional/local frequency dynamic. The analysis leverages data from a low-voltage wide area monitoring system (WAMS) and publicly available historical generation records from the Brazilian System Operator. A methodology is introduced to extract local frequency fluctuations across regions using a variational mode decomposition (VMD) approach. The findings reveal a continuous degradation in the system-wide frequency and local frequency variations, underscoring the need for enhanced regional monitoring and evaluation metrics to maintain frequency stability in large-scale interconnected systems.

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Bruno Pinheiro, M. C. Llerena Velasquez, Giovane Faria, A. F. C. Aquino, Diego Issicaba, Daniel Dotta. 2025-03-14. Evaluation of the Impact of IBR on the Frequency Dynamics in the Brazilian Power System. https://doi.org/10.1016/j.segan.2025.101827

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