The maintenance of adequate system voltage profiles, particularly in the event of potential system disturbances or contingencies, is a vital concern in system operation. The problems of declining or sagging system voltages under heavy loading conditions and the loss of voltage stability or voltage collapse following a major disturbance has been of interest lately. Specifically, the problem of modeling the voltage collapse phenomenon. We have developed a framework which takes into account both the static and dynamic mechanism of voltage collapse (VC). Although this framework cannot encompass all the phenomena exhibited (such as bifurcation and multiple load flows), it has enabled us to evaluate the effectiveness of the various methods found in the literature. Moreover, we have obtained criteria for evaluating how effective the currently used VC indices and criteria are in predicting voltage collapse.
The following papers illustrate our work in voltage collapse:
1. "An Extended Study of Dynamic Voltage Collapse Mechanism," C.C. Liu, K. Vu, R. Fischl and J-C Chow, Proc . of the 28th CDC Conference, Dec. 1989, Tampa, Fl.
2. "Performance Indexes for Predicting Voltage Collapse," R. Fischl, EPRI Report No. EL-6461, July 1989.
3. "On The Evaluation of Voltage Collapse Criteria," J-C Chow, R. Fischl and H. Yan, Proc. of the 16th PICA Conference, May 1-5, 1989, Seattle, WA.
4. "Decision Support Framework For Evaluating Voltage Collapse Criteria," R.Fischl, Proceedings of Engineering Foundation Workshop on Bulk Power Voltage Phenomena - Voltage Stability and Security, EPRI Report No. EL-6183, pp 7-59 - 7-109, Jan. 1989
5. "A Comparison of Indices for Predicting Voltage Collapse In Power Systems,", R. Fischl, J-C Chow, H. Yan, F. Mercede and F.F. Wu, Proc. of 27th CDC Conference, Dec. 1988, Austin, TX.
6. "A Framework to Predict Voltage Collapse in Power Systems," F. Mercede, J-C Chow, H. Yan and R. Fischl, IEEE Trans. on Power Systems, vol. PWRS-3, No.4, pp. 1807-13, Nov. 1988.
7. "A Comparison of Dynamic Security Indices Based on Direct Methods," R. Fischl, F. Mercede, F. Wu and H-D Chiang, International Journal of Electrical Power and Energy Systems, pp. 210-232, Oct. 1988.
8. "Can Voltage Security Indices Predict Voltage Collapse Problems in Large Scale Power Networks," R. Fischl and F. Mercede, Proc. of 1988 IEEE Int. Symp. on Circuits and Systems, Helsinki, Finland, June 1988, pp. 665-668.
9. "A Comparison of Dynamic Security Indices Based on Direct Methods," R. Fischl, F. Mercede, F. Wu and H-D Chiang, Proc. of 9th PSCC, August 30-Sep. 4, 1987.
10. "A Review of Methods for Predicting Voltage Collapse," L. Zaragocin, R. Fischl, F. Mercede, H. Yan, R. O'Connell, J. Chow, C. Tsay, 1986 North American Power Symposium, Cornell University, Oct. 1986.
11. "Power System Models for Voltage Collapse," with L. Zaragocin, F. Mercede, H. Yan, Proc. of International Symposium on Circuits and Systems, San Jose, CA., May, 1986.
