A Survey on IBR Penetrated Power System Stability Analysis Using Frequency Scanning
Shuvangkar Chandra Das, Lokesh Saravana, Le Minh Vu, Manh Bui, Tuyen Vu, Jianhua Zhang, Thomas Ortmeyer
TL;DR
This survey addresses stability challenges posed by subsynchronous resonance and oscillations in grids with growing inverter-based resources. It advocates frequency-scanning approaches across positive-sequence, dq-frame, and alpha-beta frames, complemented by perturbation shapes such as single- and multi-tone signals and waveform types including ramp and chirp. Key contributions include a historical synthesis of SSO events, a taxonomy of white-, black-, and gray-box stability analyses, and a systematic comparison of scanning techniques with guidance on interpreting results via combined scans and impedance-ratio criteria. The work offers practical insights for operators and researchers to detect, interpret, and mitigate instability in systems with high renewable penetration, leveraging both Nyquist-based and impedance-based frameworks to enhance grid reliability.
Abstract
The rapid rise in inverter-based renewable resources has heightened concerns over subsynchronous resonance and oscillations, thereby challenging grid stability. This paper reviews approaches to identify and mitigate these issues, focusing on frequency scanning methods for stability assessment. It categorizes white-, black-, and gray-box modeling techniques, compares positive-sequence, dq-frame, and alpha-beta domain scanning, and examines perturbation shapes like step, ramp, and chirp. A comparative study highlights their strengths, limitations, and suitability for specific scenarios. By summarizing past events and surveying available tools, this work guides operators and researchers toward more effective, reliable stability analysis methods in grids with high renewable penetration.