Participation Analysis in Impedance Models: The Grey-Box Approach for Power System Stability

This paper develops a grey-box approach to small-signal stability analysis of complex power systems that facilitates root-cause tracing without requiring disclosure the full details internal control structure apparatus connected system. The enables participation in impedance models, which is popular electronics and increasingly accepted for analysis. Impedance factor proposed defined terms residue whole-system admittance matrix. It proved that, so equals sensitivity eigenvalue with respect impedance. classic state related via chain-rule. Based on chain-rule, three-layer approach, three degrees transparency, different depths, i.e. apparatus, states, parameters, according available information. association points re-tuning would stabilize can be measured field or calculated from black-box spectra little prior knowledge required.