Table 1.
Stability analysis methods.
| Method | Focus | Strength | Limitation | Role in R-EAPC |
|---|---|---|---|---|
| Small-signal | Eigenvalue shifts | Quick insight into damping | Linearized; local only | Shows improved damping under R-EAPC |
| Frequency-domain | Bode/Nyquist plots | Reveals stability margins | Ignores nonlinear effects | Confirms sufficient control bandwidth |
| CPF (continuation power flow) | Loadability curves | Captures voltage stability margin | Computationally heavy | Demonstrates feeder margin extension |
| Lyapunov | Global stability | Rigorous theoretical proof | Requires assumptions | Ensures overall stability guarantee |