One of the key problems in security assessment has been the determination if the system is transient stable or unstable following a contingency. To be able to perform this assessment on-line new direct methods for predicting if a system is stable of not have been proposed. We have done an extensive literature review of direct methods currently available for determining if a system is transient stable or unstable. Our interest in this area is to develop an Automatic Contingency Selection algorithm for ranking contingencies from the stability point of view to determine which are more insecure in terms of transient stability. Clearly, one critical issue is the tradeoff between the accuracy of the model (specifically the load model) and the accuracy of the indices used in ranking the contingencies.
The following papers illustrate our work in transient stability prediction:
1. "A Comparison of Dynamic Security Indices Based on Direct Methods," F. Mercede, R. Fischl, F. Wu, H-D Chiang, International Journal of Electrical Power and Energy Systems, Vol. 10, No. 4, pp. 210-232, Oct. 1988.
2. "A Comparison of Dynamic Security Indices Based on Direct Methods," F. Mercede, R. Fischl, F. F. Wu, H-D Chiang, 9th Power Systems Computation Conference, Aug. 30-Sept. 4, 1987, Lisbon, Portugal.
3. "A Review of Dynamic Security Indices Based on Direct Methods", R. Fischl, F. Mercede, F. F. Wu and H-D Chiang, Proc. of the 24th IEEE Conference on Decision and Control, Fort Lauderdale, FL, Dec.ll-l3, l985.
4. "On the Modeling of Dynamic Security Regions of Power Systems,", F. Mercede, R. Fischl, Proc. of the 1984 Midwest Power Symposium, Drexel University, Philadelphia, PA, October 1984. "A Method for Improving Power System Transient Stabilities Using Dynamically Responsive DC Transmission Lines", W. Puntel, R. Fischl, Paper No.70 CP 671-PWR, IEEE Summer Power Meeting, Los Angeles, California, 1970.
