SMIB - PowerWorld

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SMIB Participation Factors • From the block diagram for PIDGOV, the state “Governor PI” is right after the point where Rperm contributes to the feedback loop • The positive eigenvalue is indeed due to the governor • Note that this discussion is the same regardless of whether you use the Gen_50513_1 case or the full WestExample T11: SMIB Training © 2012 PowerWorld Corporation 22
SMIB Eigenvalues Example • Also, you can easily make certain models for a particular generator inactive to see how it impacts the SMIB eigenvalues • This can help you narrow down some of the other sources of positive eigenvalues • Recall that bus 57236 currently has the largest maximum eigenvalue with 3.5259 • Run Validation and AutoCorrection; then, for bus 57236, make everything inactive except the machine, GENROU • Re-Initialize and do the analysis again Disabling all geneator models except GENROU makes SMIB Eigenvalues negative • This generator now has only negative eigenvalues • Can we narrow down which model is contributing to this smallsignal instability? T11: SMIB Training © 2012 PowerWorld Corporation WestExample.pwb 23
Page 1 and 2: Transient Stability Analysis with P
Page 3 and 4: SMIB Eigenvalues • Click Run SMIB
Page 5 and 6: SMIB Eigenvalues Example • Open t
Page 7 and 8: Extremely Large Negative Minimum Ei
Page 9 and 10: SMIB Eigenvalues Example • After
Page 11 and 12: SMIB Eigenvalues Dialog • Some of
Page 13 and 14: SMIB Eigenvalues Dialog • A Matri
Page 15 and 16: SMIB Eigenvalues Dialog Pole locati
Page 17 and 18: SMIB Eigenvalues Example • Going
Page 19 and 20: SMIB Two-Bus Equivalent • Now ope
Page 21: SMIB Participation Factors • Open
Page 25 and 26: SMIB Eigenvalues Example • Howeve
Page 27 and 28: SMIB Eigenvalues Example • Let’

SMIB - PowerWorld

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