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Authors
Kaberere, Keren; Petroianu, Alexander; Folly, Komla

Digital Object Identifier (DOI)
10.3182/20060625-4-CA-2906.00055

Page Numbers:
291-296

Index Terms
eigenvalue analysis,electromechanical mode,speed deviation,turbine model output

Abstract
Power system analytical tools differ in their components modelling. The differences affect electromechanical modes damping. This paper investigates the effect of including rotor speed deviation in stator voltage calculation -with the stator transients neglected- and the modelling of turbine output, on electromechanical mode damping of a single machine infinite bus system. We use a sixth order generator model with different excitation control configurations. We analyse results obtained with EUROSTAG and compare these with results obtained with three other industrial-grade tools. Our results show that: (i) if rotor speed deviation is included in the stator voltage calculation, the results are more conservative than those obtained if speed deviation is neglected. (ii) if the turbine model output is torque, the results are more conservative than those obtained if the output model is power.

References

[1] Dandeno, P.L., P. Kundur and R.P. Schulz (1974).
    Recent Trends and Progress in Synchronous
    Machine Modelling in the Electric Utility
    Industry. Proceedings of the IEEE, Vol. 62, No. 7,
    July, pp. 941-950.
[2] IEEE Committee Report (1973). Dynamic Models for
    Steam and Hydro Turbines in Power System
    Studies. IEEE Transactions on Power Apparatus
    and Systems, Vol. PAS-92, November/December,
    pp. 1904-1915.
[3] IEEE Std 1110 (1991). IEEE Guide for Synchronous
    Generator Modelling Practices in Stability
    Analysis.
[4] Johansson, E., J. Persson, L. Lindkvist and L. Söder
    (2002). Location of Eigenvalues Influenced by
    Different Models of Synchronous Machines,
    presented at the Sixth IASTED International
    Conference Power and Energy Systems, Marina
    del Rey, California, USA, May 13-15.
[5] Kaberere, K.K., M. Ntombela, K.A. Folly, and A.I.
    Petroianu (2005a). Comparison of Industrial-Grade
     Analytical Tools Used in Small-Signal
    Stability Assessment, Proceedings of the AUPEC
    2005, Hobart, Tasmania, Australia, September 25-
    28, vol. 1, pp. 147-152.
[6] Kaberere, K.K., K.A. Folly, M. Ntombela, and A.I.
    Petroianu (2005b). Comparative Analysis and
    Numerical Validation of Industrial-Grade Power
    System Simulation Tools: Application to Small-Signal
     Stability, Proceedings of the 15th PSCC,
    Liege, Belgium, August 22-26.
[7] Krause, P.C., F. Nozari, T.L. Skvarenina, D.W. Olive
    (1979). The Theory of Neglecting Stator
    Transients. IEEE Transactions on Power
    Apparatus and Systems, Vol. PAS-98,
    January/February, pp. 141-148.
[8] Kundur, P. (1994). Power System Stability and
    Control. McGraw-Hill, ISBN 0-07-035958-X
[9] Kyriakides, E. and R.G. Farmer (2004). Modeling of
    Damping for Power System Stability Analysis.
    Electric Power Components and Systems, Vol. 32,
    No. 8, pp. 827-837.
[10] Power System Damping Ad Hoc Task Force (1999),
     Damping representation for power system stability
     studies. IEEE Transactions on Power Systems,
     Vol. 14, No. 1, pp. 151-157.
[11] Rogers, G. (2000). Power System Oscillations.
     Kluwer Academic Publishers, ISBN 0-7923-7712-
     5.
[12] Slootweg, J.G., J. Persson, A.M. van Voorden, G.C.
     Paap, and W.L. Kling (2002). A Study of the
     Eigenvalue Analysis Capabilities of Power
     System Dynamics Simulation Software,
     Proceedings of the 14th PSCC, Sevilla, 24-28
     June.