Distributed Generator Placement for Loss Reduction and Improvement in Reliability

Distributed Power generation has gained a lot of attention in recent times due to constraints associated with conventional power generation and new advancements in DG technologies .The need to operate the power system economically and with optimum levels of reliability has further led to an increase in interest in Distributed Generation. However it is important to place Distributed Generator on an optimum location so that the purpose of loss minimization and voltage regulation is dully served on the feeder. This paper investigates the impact of DG units installation on electric losses, reliability and voltage profile of distribution networks. In this paper, our aim would be to find optimal distributed generation allocation for loss reduction subjected to constraint of voltage regulation in distribution network. The system is further analyzed for increased levels of Reliability. Distributed Generator offers the additional advantage of increase in reliability levels as suggested by the improvements in various reliability indices such as SAIDI, CAIDI and AENS. Comparative studies are performed and related results are addressed. An analytical technique is used in order to find the optimal location of Distributed Generator. The suggested technique is programmed under MATLAB software. The results clearly indicate that DG can reduce the electrical line loss while simultaneously improving the reliability of the system.

Authors:

• Priyanka Paliwal
• N.P. Patidar

Keywords:

• AENS
• CAIDI
• Distributed Generation
• lossreduction
• Reliability
• SAIDI

References:

[1] P. Barker, Robert W. De Mello, "Determining the impact of Distributed
Generation on Power Systems: Part 1- Radial Distribution Syst-ems", in
proceedings of IEEE PES Summer Meeting, Vancouver, Canada, July: pp
1645-1646.
[2] Vu Van T, Woyte A, Soens J, Driesen J and Belmans, R.2003, " Impact
of Distributed Generation on Distribution System Power Quality" In
proceedings of Electric Power Quality Utilization, Cracow, Poland.
[3] Carmen L.T. Borges, Djalma M. Falco, "Impact of Distributed generation
allocaion and sizing on Reliability, losses and Voltage Profile", 2003,
IEEE, Bologna Power Tech conference.
[4] R. L. Alvarado, "Locational aspects of Distributed Generation",
Proceeding of IEEE PES winter meeting, volume 1, pp.140, Ohio 2001.
[5] Caisheng Wang, M. Hashem Nehrir, "Analytical approaches for optimal
placement of Distributed Generation sources in Power systems", IEEE
transactions on Power System vol.19, No.4.
[6] N. Hadjsaid, J. F. Canard, and F. Dumas, "Dispersed generation impact
on distribution networks," IEEE Comput. Appl. Power, vol. 12, pp22-28,
Apr. 1999
[7] T.Griffin, K. Tomsovic, D. Secrest, and A. Law, "Placement of dispersed
generation systems for reduced losses," in Proc. 33rd Annu. Hawaii
Int.Conf. Systems Sciences, Maui, HI, 2000.
[8] H. L. Willis, "Analytical methods and rules of thumb for modeling DG-
distribution interaction," in Proc. 2000 IEEE Power Engineering Society
Summer Meeting, vol. 3, Seattle,WA, July 2000, pp. 1643-1644.
[9] K.-H. Kim, Y.-J. Lee, S.-B. Rhee, S.-K. Lee, and S.-K. You, "Dispersed
generator placement using fuzzy-GA in distribution systems," in Proc.
2002 IEEE Power Engineering Soc. Summer Meeting, vol. 3, Chicago,
IL, July 2002, pp. 1148-1153.
[10] Puttgen, H. B., Macgregor, P. R., and Lambert F.C., "Distributed
Generation: Semantic Hype or the Dawn of a New Era?," IEEE Power
&Energy Magazine, pp. 22-29, January/February 2003.
[11] R. E. Brown and L. A. Freeman, "Analyzing the Reliability Impact of
Distributed Generation", Proceedings of the IEEE Summer Meeting, pp.
1013-1018, July 2001.
[12] R. Billinton and R. Allan, "Reliability Evaluation of Engineering
Systems: Concepts and Techniques", Plenum Press - New York, Second
Edition, 1992.
[13] R. Billinton and R. Allan, "Reliability Evaluation of Power Systems",
Plenum Press - New York, Second Edition, 1996.
[14] Y. He, G. Anderson and R. N. Allan, "Determining Optimum Locatand
Number of Automatic Switching Devices in Distribution Systems",
Proceedings of IEEE Power Tech-99 Conference, Budapest, Hungary,
1999.