Fault Diagnosis in Distribution Networks with Distributed Generation

Amany M. El-Zonkoly

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DOI: 10.4236/sgre.2011.21001                

Abstract

The penetration of distributed generation (DG) in distribution power system would affect the traditional fault current level and characteristics. Consequently, the traditional protection arrangements developed in distribution utilities are difficult in coordination. Also, the reclosing scheme would be affected. With the rapid developments in distribution system automation and communication technology, the protection coordination and reclosing scheme based on information exchange for distribution power system can be realized flexibly. This paper proposes a multi-agent based scheme for fault diagnosis in power distribution networks with distributed generators. The relay agents are located such that the distribution network is divided into several sections. The relay agents measure the bus currents at which they are located such that it can detect and classify the fault, and determine the fault location. The proposed technique uses the entropy of wavelet coefficients of the measured bus currents. The performance of the proposed protection scheme is tested through simulation of two systems. The first system is a benchmark medium voltage (MV) distribution system and the second system is practical 66 kV system of the city of Alexandria.

Keywords

Cooperative Systems, Relay Agent, Fault Diagnosis, Distributed Generation, Wavelet Transform, Entropy Calculation

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Z. Chen and W. Kong, “Protection Coordination Based on Multi-Agent for Distribution Power System with Distribution Generation Units, 2007, pp. 1-5. http://vbn.aan.dk/fbpretrieve/14217079
[2]	P. Barker and R. W. de Mello, “Determining the Impact of Distributed Generation on Power Systems: Part 1—Radial Power Systems,” Proceedings of IEEE Power Engineering Society Summer Meeting, Seattle, July 2000, pp. 1645-1658.
[3]	N. Perera, A. D. Rajapakse and T. E. Buchholzer, “Isolation of Faults in Distribution Networks with Distributed Generators,” IEEE Transactions on Power Delivery, Vol. 23, No. 4, October 2008, pp. 2347-2355. doi:10.1109/TPWRD.2008.2002867
[4]	“IEEE Standard for Interconnecting Distributed Resources with Electric Power Systems,” IEEE Std., 2003.
[5]	A. K. Pradhan, A. Routray and S. M. Gudipalli, “Fault Direction Estimation in Radial Distribution System Using Phase Change in Sequence Current,” IEEE Transactions on Power Delivery, Vol. 22, No. 4, 2007, pp. 2065-2071. doi:10.1109/TPWRD.2007.905340
[6]	W. El-Khattam and S. Sidhu, “Restoration of Directional Overcurrent Relay Coordination in Distributed Generation Systems Utilizing Fault Current Limiter,” IEEE Transactions on Power Delivery, Vol. 23, No. 2, 2008, pp. 576-585. doi:10.1109/TPWRD.2008.915778
[7]	H. H. Zeineldin and J. L. Kirtley, “A Simple Technique for Islanding Detection with Negligible Nondetection Zone,” IEEE Transactions on Power Delivery, Vol. 24, No. 2, April 2009, pp.779-786. doi:10.1109/TPWRD. 2009.2013382
[8]	S. M. Brahma and A. A. Girgis, “Development of Adaptive Protection Scheme for Distribution Systems with High Penetration of Distributed Generation,” IEEE Transactions on Power Delivery, Vol. 19, No. 1, 2004, pp. 56-63. doi:10.1109/TPWRD.2003.820204
[9]	Z. Y. He, X. Q. Chen and G. M. Luo, “Wavelet Entropy Measure Definition and Its Application for Transmission Line Fault Detection and Identification (Part I: Definition and Methodology),” Proceedings of International Conference on Power System Technology, Chongqing, 2006, pp. 1-6.
[10]	Z. Y. He, X. Q. Chen and G. M. Luo, “Wavelet Entropy Measure Definition and Its Application for Transmission Line Fault Detection and Identification (Part III: Transmission Line Faults Transients Identification),” Proceedings of International Conference on Power System Technology, Chongqing, 2006, pp.1-6.
[11]	Z. M. Li, W. X. Li and R. Y. Liu, “Applications of Entropy Principles in Power System: A Survey,” IEEE/PES of Transmission and Distribution Conference and Exhibition, Dalin, 5 December 2005, pp. 1-4.
[12]	Y. Tomita, C. Fukui, H. Kudo, J. Koda and K. Yabe, “A Cooperative Protection System with an Agent Model,” IEEE Transactions on Power Delivery, Vol. 13, No. 4, 6 October 1998, pp. 1060-1066. doi:10.1109/61.714454
[13]	S. Sheng, K. K. Li, W. L. Chan, X. J. Zeng and X. Z. Duan, “Agent-Based Self-Healing Protection System,” IEEE Transactions on Power Delivery, Vol. 21, No. 2, April 2006, pp. 610-618. doi:10.1109/TPWRD.2005.860243
[14]	D. V. Coury, J. S. Thorp, K. M. Hopkinson and K. P. Birman, “An Agent-Based Current Differential Relay for Use with a Utility Intranet,” IEEE Transactions on Power Delivery, Vol. 17, No. 1, 2002, pp. 47-53. doi:10.1109/61.974186
[15]	K. Rudion, Z. A. Styczynski, N. Hatziargyiou, S. Papathanassiou, K. Strunz, O. Ruhle, A. Orths and B. Rozel, “Development of Benchmarks for Low and Medium Voltage Distribution Networks with High Penetration of Dispersed Generation,” 2007, pp.1-7. http://users.nuta.gr/stpapath/paper-2.61.pdf