Sensitivity of Nyquist Plot in Impedance Analysis and Usage in Multiparameter Tuning

The impedance analysis, as a well-established technique to analyze the small-signal stability of interconnected systems, has gained increasing popularity in recent years. To promote the performance of impedance analysis in the multiparameter coordinated tuning, the exclusive sensitivity for Nyquist plot and its computing algorithm are developed in this article, thus a sensitivity- and optimization-based parameter tuning method is further proposed. Finally, a multiterminal dc distribution system and a two-stage power supply system are studied to demonstrate the effectiveness of the proposed sensitivity and parameter tuning method.