Evaluating the Impact of a Load Admittance Approximation in Transient Stability-Constrained Optimal Power Flow
The paper proposes a practical method to simplify Transient Stability-Constrained Optimal Power Flow (TSC-OPF) by approximating constant power loads as constant admittances using a 1 p.u. voltage assumption. This allows for precomputing the reduced admittance matrix outside the optimization, significantly reducing computational effort and solving convergence issues without substantially affecting rotor dynamics during the fault.