Analysis Methods

This chapter first presents the objectives of oscillatory stability and the classification of the analysis methods in the time and frequency domains is presented. The chapter focuses on common frequency-domain impedance-based analysis methods are discussed, including the source-load impedance-based Nyquist criterion, frequency domain modal analysis, and aggregated impedance network model. Next, the time-domain eigenvalue and EMT-simulation analysis methods are discussed briefly. Finally, critical insights into the strengths and limitations of different oscillatory stability analysis methods are presented.