Computer Methods in Power System Analysis

AIEE American Electric Power basic cut-set basic loop branch bus admittance matrix Bus code bus currents bus impedance matrix bus voltages buses coefficient components connected graph determined differential equation digital computer Ek+1 element p-q equal Euler method fault current faulted bus Gauss Gauss-Seidel method given in Table incidence matrix internal voltage angles iterative method iterative solution load flow calculation load flow solution loop admittance matrix loop currents machine at bus Megawatts mutually coupled network elements network matrices Newton-Raphson Newton-Raphson method node obtained operations partial network performance equation phase positive sequence pq.pq primitive admittance reactance reactive power reference 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 ρα Ура