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Interconnection Protection Issues

Interconnection Protection Issues. Protection related problems in the distribution systems due to presence of D istributed Generation. Problems when a fault occurs …. Islanding Overvoltages Ferroresonance Loss of synchronism Loss of Coordination Sympathetic Trippings. Islanding.

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Interconnection Protection Issues

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  1. Interconnection Protection Issues Protection related problems in the distribution systems due to presence of Distributed Generation

  2. Problems when a fault occurs … • Islanding • Overvoltages • Ferroresonance • Loss of synchronism • Loss of Coordination • Sympathetic Trippings

  3. Islanding • “A condition in which a portion of the utility system that contains both load and distributed resources remains energized while isolated from the remainder utility system” – IEEE Std. 100-2000 • Technical and legal concerns when Distributed Generation supply abnormal voltage and frequency to the utility customers

  4. Overvoltages

  5. Ferroresonance

  6. Out of Synchronism • Between automatic reclosing intervals, the DGs may no longer be in synchronism with the utility • Closing in out of sync generator can result in severe personal and equipment damage

  7. Loss of Coordination

  8. Sympathetic Trippings

  9. Protection Example

  10. References • A. Zamani, T. Sidhu, and A. Yazdani, "A strategy for protection coordination in radial distribution networks with distributed generators," in Power and Energy Society General Meeting, 2010 IEEE, 2010, pp. 1-8. • S. A. M. Javadian, M. R. Haghifam, M. FotuhiFiroozabad, and S. M. T. Bathaee, "Analysis of protection system’s risk in distribution networks with DG," International Journal of Electrical Power & Energy Systems, vol. 44, pp. 688-695, 1// 2013. • K. Kauhaniemi and L. Kumpulainen, "Impact of distributed generation on the protection of distribution networks," in Developments in Power System Protection, 2004. Eighth IEE International Conference on, 2004, pp. 315-318 Vol.1. • R. F. Arritt and R. C. Dugan, "Distributed generation interconnection transformer and grounding selection," in Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century, 2008 IEEE, 2008, pp. 1-7. • P. Barker, "Overvoltage considerations in applying distributed resources on power systems," in Power Engineering Society Summer Meeting, 2002 IEEE, 2002, pp. 109-114 vol.1. • C. J. Mozina, "Impact of Green Power Distributed Generation," Industry Applications Magazine, IEEE, vol. 16, pp. 55-62, 2010. • "IEEE Recommended Practice for Electric Power Distribution for Industrial Plants," IEEE Std 141-1993, pp. 1-768, 1994. • G. Dalke, A. Baum, B. Bailey, J. M. Daley, B. Duncan, J. Fischer, et al., "Risks From Utility Supply Disruption," Industry Applications Magazine, IEEE, vol. 17, pp. 47-56, 2011. • D. A. Tziouvaras and H. Daqing, "Out-of-step protection fundamentals and advancements," in Protective Relay Engineers, 2004 57th Annual Conference for, 2004, pp. 282-307. • Distributed Generation Technical Interconnection Requirements," Hydro One, 2011

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