Admittance-Based Stability Analysis: Bode Plots, Nyquist Diagrams or Eigenvalue Analysis?

By Lingling Fan, Zhixin Miao. IEEE Transactions on Power Systems, 2020

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In the literature, Bode plots and Nyquist diagrams are used extensively in stability analysis for admittance-based models. In this letter, we demonstrate that eigenvalues obtained from the total admittance lead to accurate prediction of stability while Bode plots and Nyquist diagrams show limitations. A voltage source converter with weak grid interconnection is used as an illustrative example to demonstrate the pros and cons of the three methods applied to <inline-formula><tex-math notation="LaTeX">$dq$</tex-math></inline-formula>-frame admittance matrices.

Subfields: Control and Systems Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/10b7c5b46088672f950a09ed6d3d26702749f24b