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Modern Power System Analysis and Operation: Insights from J. B. Gupta’s Contributions power system jb gupta pdf download
| Step | Methodology (Classical → Modern) | Outcome | |------|----------------------------------|---------| | 1. Base Load‑Flow | Newton‑Raphson (Gupta) → Fast Decoupled with PV‑specific Jacobian adjustments | Converged within 5 iterations; voltage profiles within limits. | | 2. OPF | Economic dispatch (linear cost) → AC‑OPF with renewable curtailment penalties | Minimum total generation cost achieved with 4 % solar curtailment. | | 3. Small‑Signal Stability | Eigenvalue analysis of generator swing equations → Inclusion of inverter control states | Damping ratios > 7 % for critical modes, confirming stable operation. | | 4. Fault Ride‑Through | Symmetrical component fault currents → Time‑domain simulation with inverter ride‑through controls | All fault currents cleared within 0.15 s; no loss of synchronism. | | 5. Protection Review | Traditional distance relays → Adaptive distance relays using PMU‑based impedance estimation | Reduced mis‑operations during high‑PV periods by 85 %. | 7 % for critical modes