Share This Article:

Sizing of STATCOM to Enhance Voltage Stability of Power Systems for Normal and Contingency Cases

Full-Text HTML Download Download as PDF (Size:900KB) PP. 8-18
DOI: 10.4236/sgre.2014.51002    5,394 Downloads   7,427 Views   Citations


The electric power infrastructure that has served huge loads for so long is rapidly running up against many limitations. Out of many challenges it is to operate the power system in secure manner so that the operation constraints are fulfilled under both normal and contingent conditions. Smart grid technology offers valuable techniques that can be deployed within the very near future or which are already deployed nowadays. Flexible AC Transmission Systems (FACTS) devices have been introduced to solve various power system problems. In literature, most of the methods proposed for sizing the FACTS devices only consider the normal operating conditions of power systems. Consequently, some transmission lines are heavily loaded in contingency case and the system voltage stability becomes a power transfer-limiting factor. This paper presents a technique for determining the proper rating/size of FACTS devices, namely the Static Synchronous Compensator (STATCOM), while considering contingency cases. The paper also verifies that the weakest bus determined by eigenvalue and eigenvectors method is the best location for STATCOM. The rating of STATCOM is specified according to the required reactive power needed to improve voltage stability under normal and contingency cases. Two case system studies are investigated: a simple 5-bus system and the IEEE 14-bus system. The obtained results verify that the rating of STATCOM can be determined according to the worst contingency case, and through proper control it can still be effective for normal and other contingency cases.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

H. Hassan, Z. Osman and A. Lasheen, "Sizing of STATCOM to Enhance Voltage Stability of Power Systems for Normal and Contingency Cases," Smart Grid and Renewable Energy, Vol. 5 No. 1, 2014, pp. 8-18. doi: 10.4236/sgre.2014.51002.


[1] N. G. Hingorani and L. Gyugi, “Understanding FACTS— Concepts and Technology of Flexible AC Transmission System,” Wiley-IEEE Press, New York, 2000.
[2] S. Gerbex, R. Cherkaoui and A. J. Germond, “Optimal Location of Multi-type FACTS Devices in a Power System by Means of Genetic Algorithms,” IEEE Transactions on Power Systems, Vol. 16, No. 3, 2001 pp. 537-544.
[3] H. R. Baghaee, B. Vahidi, S. Jazebi, G. B. Gharehpetian and A. Kashefi, “Power System Security Improvement by Using Differential Evolution Algorithm Based FACTS Allocation,” Joint International Conference on Power System Technology and IEEE Power India Conference, 2008, pp. 1-6.
[4] K. Morison, L. Wang and P. Kundur, “Power System Security Assessment,” IEEE Power and Energy Magazine, Vol. 2, No. 5, 2004, pp. 30-39.
[5] M. Di Santo, A. Vaccaro, D. Villacci and E. Zimeo, “A Distributed Architecture for Online Power Systems Security Analysis,” IEEE Transactions on Industrial Electronics, Vol. 51, No. 6, 2004, pp. 1238-1248.
[6] IEE/PES Power System Stability Subcommittee Special Publication, “Voltage Stability Assessment: Concepts, Practices and Tools,” Product No. SP101PSS, Final Document, 2002.
[7] N. K. Sharma, A. Ghosh and R. K. Verma, “A Novel Placement Strategy for FACTS Controllers,” IEEE Transactions on Power Delivery, Vol. 18, No. 3, 2003, pp. 982-987.
[8] R. Mingus, F. Milano, R. Zarate-Minano and A. J. Conejo, “Optimal Network Placement of SVC Devices,” IEEE Transactions on Power Systems, Vol. 22, No. 4, 2007, pp. 1851-1860.
[9] O. A. Oke, D. W. P. Thomas and G. M. Asher, “A New Probabilistic Load Flow Method for Systems with Wind Penetration” 2011 IEEE Conference on PowerTech, Trondheim, 19-23 June 2011, pp. 1-6.
[10] M. A. PAI, “Computer Techniques in Power System Analysis,” 2nd Edition, McGraw Hill Publishing Company, New York, 2006.
[11] S. Kamel, M. Abdel-Akher and M. K. El-Nemr, “Hybrid Power and Current Mismatches Newton-Raphson LoadFlow Analysis for Solving Power Systems with Voltage Controlled Devices,” Proceeding of the 14th International Middle East Power System Conference (MEPCON’10), Cairo, 19-21 December 2012, Paper ID 280.
[12] N. Yorino, E. E. El-Araby, H. Sasaki and Sh. Harada, “A New Formulation for FACTS Allocation for Security Against Voltage Collapses,” IEEE Transactions on Power Systems, Vol. 18, No. 1, 2003, pp. 3-10.
[13] L. N. Giang, N. T. D. Thuy and T. T. Ngoat, “Assessment Study of STATCOM’s Effectiveness in Improving Transient Stability for Power System,” TELKOMNIKA, Vol. 11, No. 10, 2013, pp. 6095-6104.
[14] S. Greene, et al., “Contingency Ranking for Voltage Collapse via Sensitivities from a Single Nose Curve,” IEEE Transactions on Power System, Vol. 14, No. 1, 1999, pp. 232-238.
[15] G. C. Ejebe, et al., “Methods for Contingency Screening and Ranking for Voltage Stability Analysis of Power Systems,” IEEE Transactions on Power Systems, Vol. 11, No. 1, 1996, pp. 350-356.
[16] E. Vaahedi, et al., “Voltage Stability Contingency Screening Ranking,” IEEE Transactions on Power Systems, Vol. 14, No. 1, 1999, pp. 256-261.
[17] M. Alinezhad and M. A. Kamarposhti, “Static Voltage Stability Assessment Considering the Power System Contingencies using Continuation Power Flow Method,” International Journal of Energy and Power Engineering, Vol. 3, No. 1, 2010, p. 6.
[18] L. T. Ha and T. K. Soha, “Investigation of Power Loss and Voltage Stability Limits for Large Wind Farm Connections to a Subtransmission Network,” IEEE Power Engineering Society General Meeting, Denver, 6-10 June 2004, pp. 2251-2256.
[19] A. Chakrabarti, D. P. Kolhari and A. K. Mukhopadhyay, “Reactive Power Control and Voltage Stability in Power Transmission System,” PHI Private Limited, New Delhi, 2010.
[20] S. Halder and A. Chakrabarti, “Power System Analysis Operation and Control,” Prentice-Hall of India Private Limited, New Delhi, 2006.
[21] Enrique Acha, et al., “FACTS, Modelling and Simulation in Power Networks,” John Wiley & Sons, New York, 2004.

comments powered by Disqus

Copyright © 2018 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.