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1. Find Ybus for figure below assuming that all the transmission links have identical Π-equivalent circuits; series element impedance is 0.01+j0.1 and each(of the two) shunt element admittances is j0.8.
2. We are given the system shown in figure below and the following equations for bus powers:
S1=j19.98 IV1I2 -jV1V2*-j10V1V3*
S2=- j10V2V1*+ j19.98 |V2|2 - j10V2V3*
S3= - j10V3V1-j10V3V2*+ j19.98 IV3|2
Do one step of gauss iteration to find V21 and V31. Start with V20=V30=1
3. For the system below, assume PG2=0.3, IV2I=0.95, and SD3=0.5+j0.2.Starting with Θ20=Θ30=0 and |V3|0=1.0, do one N-R iteration and find IV3I1, Θ21 and Θ31. Evaluate the mismatch vector after this single iteration.
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