Computer Methods in Power System Analysis

admittance form AIEE American Electric Power augmented matrix basic cut-set basic loop branch bus admittance matrix Bus code bus currents bus impedance matrix bus voltages buses coefficient connected graph determined differential equation digital computer Ek+1 element p-q Euler method fault current faulted bus Gauss Gauss-Seidel method given in Table incidence matrix internal voltage angles iterative method iterative solution linear load flow solution loop admittance matrix loop currents machine at bus mutually coupled network elements network matrices Newton-Raphson method obtained operations parameters partial network performance equation positive sequence pq pq pq.pq primitive admittance primitive network reactance reactive power relay representation Runge-Kutta method sample system sequence impedances short circuit shown in Fig slack bus solved submatrices Substituting from equation symmetrical components system for Prob three-phase tion Trans transformation transient stability variables vector Y₁ YBUS ZBUS zero sequence ZLOOP ρα Ура