Impact of Islanding on Governor Signal of Distributed Resources
- 1
- 2
- 3
Abstract
Technical and economical impacts of distributed resources have encouraged big industry managers and distribution systems’ owners to utilize small type of electric generations. One important preventive issue to develop these units is islanding situation. Expert diagnosis system is needed to distinguish network cut off from normal occurrences. It should detect islanding in time to disconnect the unit and prevent any additional failures in equipment. An important part of synchronous generator is automatic load-frequency controller (ALFC). This controller is designed properly to respond to load variations and to fix frequency at constant value when working alone as an islanding system and to control output power when operating in parallel with the main. In this paper, a new approach based on monitoring ALFC re-sponse with regard to input signal to governor is introduced. Numbers of initial crossing value are introduced as an index for islanding detection. Simulation results show that input signal to governor has different characteristics in common disturbances.
- IEEE Standard for Interconnecting Distributed Sources with Electric Power Systems, IEEE Standard 1547, 2003.
- M. A. Refern, O. Usta and G. Fielding, “Protection against Loss of Utility Grid Supply for a Dispersed Storage and Generation Unit,” IEEE Transaction on Power Delivery, Vol. 8, No. 3, July 1993, pp. 948-954. doi:10.1109/61.252622
- M. Ropp, K. Aaker, J. Haigh and N. Sabhah, “Using Power Line Carrier Communications to Prevent Islanding,” Proceedings of 28th IEEE Photovoltaic Specialist Conference, 2000, pp. 1675-1678.
- M. A. Redfern, J. I. Barren and O. Usta, “A New Microprocessor Based Islanding Protection Algorithm for Dispersed Storage and Generation Units,” IEEE Transactions on Power Delivery, Vol. 10, No. 3, July 1995, pp. 1249- 1254. doi:10.1109/61.400903
- J. Warin and W. H. Allen, “Loss of Mains Protection,” Proceedings of 1990 ERA Conference on Circuit Protection for industrial and Commercial Installation, London, pp. 1-12.
- S. Jang and K. Kim, “Development of a Logical Rule- Based Islanding Detection Method for Distributed Resources,” Proceedings of IEEE Power Engineering Society Winter Meeting, Vol. 2, 2002, pp. 800-806.
- S. I. Jang and K. H. Kim, “An Islanding Detection Method for Distributed Generations Using Voltage Unbalance and Total Harmonic Distortion of Current,” IEEE Transactions on Power Delivery, Vol. 19, No. 2, April 2004, pp. 745-752. doi:10.1109/TPWRD.2003.822964
- P. D. Hopewell, N. Jenkins and A. D. Cross, “Loss of Mains Detection for Small Generators,” IEE Proceedings of Electric Power Applications, Vol. 143, No. 3, May 1996, pp. 225-230. doi:10.1049/ip-epa:19960286
- G. A. Smith, P. A. Onions and D. G. Infield, “Predicting Islanding Operation of Grid Connected PV Inverters,” IEE Proceedings of Electric Power Applications, Vol. 147, January 2000, pp. 1-6. doi:10.1049/ip-epa:20000004
- M. E. Ropp, M. Begovic and A. Rohatgi, “Analysis and Performance Assessment of the Active Frequency Drift Method of Islanding Prevention,” IEEE Transactions on Energy Conversion, Vol. 14, No 3, September 1999, pp. 810-816. doi:10.1109/60.790956
- A. Cardenas, K. Agbossou and M. L. Doumbia, “Islanding Detection Method for Multi-Inverter Distributed Generation,” Journal of Electromagnetic Analysis & Applications, September 2009.
- V. Menon and M. H. Nehrir, “A Hybrid Islanding Detection Technique Using Voltage Unbalance and Frequency Set Point,” IEEE Transactions on Power Systems, Vol. 22, No. 1, Feburary 2007, pp. 442-448. doi:10.1109/TPWRS.2006.887892