Equilibrium-Independent Passivity of Power Systems: A Link Between Classical and Two-Axis Synchronous Generator Models. - Takayuki Ishizaki; Taku Nishino; Aranya Chakrabortty (CoRR, 2023)

Small-Signal Stability Condition of Inverter-Integrated Power Systems: Closed-Form Expression by Stationary Power Flow Variables. - Taku Nishino; Yoshiyuki Onishi; Takayuki Ishizaki (CoRR, 2025)