TIME-FREQUENCY ANALYSE FOR INTER-AREA OSCILLATIONS OF LONGITUDINAL POWER SYSTEM
The main objective of this paper is to report the small-signal stability analysis for a power system which is under fast development and has a longitudinal grid pattern. Spontaneous low-frequency oscillations are potential to occur in the exchange of regional power flow under normal operation, especially in the operation of an interconnected power system with a longitudinal network structure. The inter-area oscillations often have features of being low frequency, lightly damped, and affecting relatively more generating units located in multiple areas. The method of eigen- analysis is utilized to perform the study of the inter-area oscillations with an emphasis on the oscillation mode with low frequency and light damping. The eigenvalues with associated eigenvectors and participation factors are calculated and analyzed in details. It is found that the smallsignal stability analysis will provide useful information in the planning and operation of the study system.
P. Kundur, Power System Stability and Control, McGraw-Hill, 1994.
P. M. Anderson, A. A. Fouad, Power System Control and Stability, IEEE Press, 1994.
G. Rogers, Power System Oscillation, Kluwer Academic Publishers, Norway, MA, 2000.
M. Klein, G. J. Rogers, S. Moorty, and P. Kundur, “Analytical investigation of factors influencing power system stabilizer performance,” IEEE Trans. on Energy Conversion, 7(3), pp. 382-388, 1992.
X. Yang and A. Feliachi, “Stabilization of inter-area oscillation modes through excitation systems,” IEEE Transactions on Power Systems, 9(1), pp. 494-500, 1994.
P.-H. Huang and T.-H. Tseng, “Voltage feedback controller for power system damping improvement,” Journal of Computational Information Systems, 6(14), pp. 4683- 4690, 2010.
Y.-Y. Hsu, S.-W. Shyue, and C.-C. Su, “Low frequency oscillations in longitudinal power systems: experience with dynamic stability of Taiwan power systems,’’ IEEE Transactions on Power Systems, 2(1), pp. 92-98, 1987.
P.-H. Huang and Y.-Y. Hsu, “Eigenstructure assignment in a longitudinal power system via excitation control,” IEEE Transactions on Power Systems, 5 (1), pp. 96-102, 1990.
C.-L. Chang, C.-S. Liu, and C.-K. Ko, “Experience with power system stabilizers in a longitudinal power system,” IEEE Transactions on Power Systems, 10(1), pp. 539-545, 1995.
T. D. Hoang, A. T. Nguyen, and T. T. Nguyen, “Vietnam power system — overview and challenges”, in Proceedings of 2011 EPU-CRIS International Conference on Science and Technology, Hanoi, Vietnam, November 16, pp. 1-5, 2011.
S. H. Ngo and T. H. Nguyen, “Operational problems and challenges in power system of Vietnam,” in Proceedings of 2011 EPU-CRIS International Conference on Science and Technology, Hanoi, Vietnam, November 16, pp. 1-5, 2011.
T. Tran-Quoc, T. Tran-Anh, S. Lam Du, T. Tran-Anh, B. Nguyen, A. Nguyen-Hong, R. Feuillet, and C. Praing, “Stability study for the Vietnam power system,” in Proceedings of 2003 IEEE PES Transmission and Distribution Conference and Exposition, Vol. 2, pp. 729-735, 2003.