The main theme in all our work in security assessment is to identify the set of feasible operating points (i.e., generation dispatches, transfer powers and loads) which guarantee secure operation both in the steady state and dynamic sense. We have developed an efficient algorithm for identifying the binding constraints of the steady-state security region in the generation space. Moreover, we have developed a security index which measures the safety margin of each operating point.When the system operator or planner gives us data about his power system, (such as line data, load and generation profile, operating and security constraints, etc.) then our computer program will generate the critical lines and a graphical representation of the operating region similar to that shown in some of our technical papers listed below.
The following papers illustrate our work in region-wise approach to security assessment:
1. "Performance Indices for Measuring the Robustness of Power System Operation" R. Fischl, F. Mercede, Proc. of 1985 IEEE Int. Symp. on Circuits and Systems, Kyoto, Japan, June 5-7, l985.
2. "The No Gain Theorem and Localized Response for the Decoupled P-q Power Network with Active Power Losses Included," M. Ilic-Spong, M. W. Spong, R. Fischl, IEEE Transactions on Circuits and Systems, Vol. CAS-32, No. 2, pp170 February, l985.
3. "Power System Security Assessment: Monitoring of Contingent Voltage Levels", L. H. Fink, K. Carlen, R. Fischl, H. B. Puttgen, Proc. of 23rd IEEE CDC Conference , Las Vegas, NV, Dec. l2-l4, l984.
4. "On the Selection of a Security Index for Monitoring the Size of Security Regions," J.J. Helferty, R. Fischl, Proc. of 1983 Midwest Power Symposium, Ames, Iowa, October 1983.
5. "A No Gain Theorem for Steady-State Electric Power Systems with Losses", M. Ilic-Spong and M.W. Spong, R. Fischl, Proceedings of the IEEE 1982 International Large Scale Systems Symposium, pp. 448-52, October, 1982.
6. "On the Identification of Power System Steady-State Security Region: The Slack Bus Selection", T.F. Halpin, R. Fischl, Proc. of 12th Annual Midwest Power Symposium, Purdue University, October 1980.
7. "The Identification of Feasible Strategies in the Presence of Uncertainties for Planning and Operating Power Systems", Engineering Foundation Conference on "Analytic Methodologies for Network Analysis and Storage Evaluation", Easton, Maryland, April 1-6, 1979.
8. "Secure Allocation of Regulation Reserve in the Presence of Bus Demand Uncertainty", R.B. Adler, R. Fischl, Paper No. F78-009-3, 1978 IEEE Winter Meeting, New York, N.Y., January 1978.
9. "Security Constrained Economic Dispatch With Participation Factors Based on Worst Case Bus Load Variations", R.B. Adler, R. Fischl, IEEE Trans. on Power Apparatus and Systems, Vol. PAS-96, No. 2, pp. 347-356, March/April 1977.
10. "Identification of Power System Steady-State Security Regions Under Load Uncertainty, " R. Fischl, G.C. Ejebe, J.A. DeMaio, Paper No. A76-495-2, IEEE Summer Meeting, Portland, July, 1976.
11. "Fast Identification of the Steady-State Security Region for Power System Security Enhancement", R. Fischl, and J. DeMaio, Paper No. A-76-076-0, IEEE Winter Power Meeting, New York, January 1976.
