Application of Voltage Stability Indices for Proper Placement of STATCOM under Load Increase Scenario
A. S. Telang;
P. P. Bedekar
In today’s world, electrical energy has become an indispensable component of all aspects of modern human life. Reliability, security and stability are the key aspects of any power system. Failure to meet any of these three aspects results into a great impediment to modern life. Modern power systems are being subjected to heavily stressed conditions leading to voltage stability problems. If the voltage stability problems are not mitigated properly through proper voltage stability assessment methods, cascading events may occur which may lead to voltage collapse or blackout events. Modern FACTS devices like STATCOM are one of the measures to overcome the blackout problems. As these devices are very costly, they must be installed properly at suitable locations, mostly at weak bus. Line voltage stability indices such as FVSI, Lmn and LQP play important role for identification of a weak bus. This paper presents evaluation of these line stability indices for the assessment of reliable information about the closeness of the power system to voltage collapse. PSAT is a user-friendly MATLAB toolbox, of which CPF is an important feature which has been extensively used for the placement of STATCOM to assess the stability. Novelty of the present research work lies in that the active and reactive load has been changed simultaneously at all the load buses under consideration. MATLAB code has been developed for the same and tested successfully on various standard IEEE test systems. The results for standard IEEE14 bus test system, specifically, are presented in this paper.
C. A. Canizares, A. C. Z. de Souza and V. H. Quintana, "Comparison of performance indices for detection of proximity to voltage collapse," IEEE Trans. on Power Systems, vol. 11, no. 3, pp. 1441-1450, August 1996.
H. H. Goh, Q. S. Chua, S. W. Lee, B. C. Kok, K. C. Goh, K. T. K. Teo, "Comparative Study of Line Voltage Stability Indices for Voltage Collapse Forecasting in Power Transmission System," International Journal of Electrical, Computer, Electronics and Communication Engineering, vol. 9, no. 2, pp. 132-137, 2015.
Hsiao-Dong Chiang, Ian Dobson, Robert J. Thomas, James S. Thorp and Lazhar Fekih-Ahmad, "On Voltage Collapse in Electric Power Systems," IEEE Trans. on Power Systems, vol. 5, no. 2, May1990.
I. Musirin, T.K.A. Rahman, "Estimating Maximum Loadability for Weak Bus Identification Using FVSI," IEEE Power Engineering Review, pp. 50-52, November 2002.
I. Musirin, T.K.A. Rahman, "Novel Fast Voltage Stability Index (FVSI) for Voltage Stability Analysis in Power Transmission System,"2002 Student Conference on Research and Development Proceedings, Shah Alam, Malasia, pp. 265-268, July 2002.
 M. Moghavvemi, F.M. Omar, "Technique for Contingency Monitoring and Voltage Collapse Prediction," IEEE Proceeding on Generation, Transmission and Distribution, vol. 145, pp. 634-640, November 1998.
 M.V. Suganyadevi, C.K. Babulal, "Estimating of Loadability Margin of a Power System by comparing Voltage Stability Indices,'' International Conference on Control, Automation, Communication and Energy Conservation, pp.1-4, June-2009.
 A. Kazemi, V. Vahidinasab, A. Mosallanejad, "Study of STATCOM and UPFC Controllers for Voltage Stability Evaluated by Saddle-Node Bifurcation Analysis," First International Power and Energy Conference PECon-2006, pp.191-195, November 28-29, 2006.
 Aniruddha Ray, Prof. Jayalakshmi. O. Chandle, "Voltage Stability Enhancement during Excess Load Increments through Optimal Locationof UPFC Devices," IEEE International Conference on Technological Advancements in Power & Energy, pp. 443-448, 2015.
 J. Lakkireddy, R. Rastgoufard, I. Leevongwat and P. Rastgoufard, "Steady State Voltage Stability Enhancement Using Shunt and Series FACTS Devices," IEEE-2015
 Federico Milano, "An Open Source Power System Analysis Toolbox," IEEE Transaction on Power Systems, vol. 20, no. 3, pp.1199-1206, August 2005.
 Milano F., Power System Analysis Toolbox Documentation for PSAT version 2.1.8., http://thunderbox.uwaterloo.ca/~fmilano, (2006).
P. A. Lof, T. Smed, G. Anderson and D. J. Hill, "Fast calculation of a voltage stability index," IEEE Trans. on Power Systems, vol. 7, no. 1, pp. 54-64, February 1992.
P. Kundur, J. Paserba, V. Ajjarapu, G. Andersson, A.Bose, C. Canizares, N. Hatziargyriou, D. Hill, A. Stankovic, C. Taylor, T. Van Cutsem and V. Vittal, "Definition and classification of power system stability IEEE/CIGRE joint task force on stability terms and definitions," Power Systems, IEEE Trans. vol. 19, pp. 1387 – 1401, 2004.
P.A. Lof, G. Andersonand D.J. Hill, "Voltage stability indices for stressed power systems," IEEE Trans. Power Syst.8, (1), pp. 326-335, February 1993.
T. Van Cutsem and C. Vournas, "Voltage Stability of Electric Power Systems," Massachusetts, USA: Kluwer Academic Publishers, 1998.