Calculo de las corrientes de corto circuito por medio de la matriz Ybus
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For the direct determination of the Z bus matrix we first eliminate all the voltage sources from the system. Step-1: Start with bus-1. Assume that no other buses or lines exist in the system. We add this bus to the reference bus with the impedance of j 0.25 per unit. Then the Z bus matrix is
(3.43)
Step-2 : We now add bus-2 to the reference bus using above eq. The system impedance diagram is shown in Fig. 3.10. We then can modify (3.43) as
