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New Method to Quantify the Operation Condition for Zone 3 Impedance Relays during Low-Frequency Power Swings

  • Li, Shenghu (School of Electrical Engineering and its Automation, Hefei University of Technology, China)
  • Published : 2008.03.01

Abstract

With long time setting, zone 3 impedance relays are considered insensitive to power swings, and their operation condition during power swings is seldom analyzed. Instead of ti me-consuming simulation to the swing loci, their operation condition is directly quantified by polynominal functions in this paper to find the critical swing angle and frequency for relay operation under different relay settings and system parameters. It is found: (1) the swing loci are more densely populated inside than outside of the protection region, which corresponds to long residence time and possible relay operations; (2) the relays may be sensitive to load encroac hments and stable power swings with different relay settings and system parameters; (3) the critical swing frequency may be in the range of low-frequency power swings.

References

  1. M. Klein, G.J. Rogers, and P. Kundur, 'A fundamental study of inter-area oscillations in power systems', IEEE Trans. Power Syst., vol. 6, no. 3, pp. 914-921, Aug. 1991 https://doi.org/10.1109/59.119229
  2. D.N. Kosterev, C.W. Taylor, and W.A. Mittelstadt, 'Model validation for the August 10, 1996 WSCC system outage', IEEE Trans. Power Syst., vol. 14, no. 3, pp. 967-979, Aug. 1999 https://doi.org/10.1109/59.780909
  3. B. Yu, J. Sun, S. Tang, X. Wu, and H. Liang, 'Analysis of low frequency oscillation in Hubei electric power system', Automation of Electric Power Syst., vol. 25, no. 15, pp. 39-42, Aug. 2001
  4. A. Mechraoui and D. W. P. Thomas, 'A new blocking principle with phase and earth fault detection during fast power swings for distance protection', IEEE Trans. Power Del., vol. 10, no. .3, pp. 1242-1248, July 1995 https://doi.org/10.1109/61.400902
  5. L. Zou, Q. Zhao, X. Lin, and P. Liu, 'Improved phase selector for unbalanced faults during power swings using morphological technique', IEEE Trans. Power Del., vol. 21, no. 4, pp. 1847-1855, Oct. 2006 https://doi.org/10.1109/TPWRD.2006.874608
  6. IEEE PSRC. (2005). Power Swing and Out-of-Step Considerations on Transmission Lines. Online. Available: http://www.pes-psrc.org
  7. S.H. Horowitz and A.G. Phadke, 'Third zone revisited', IEEE Trans. Power Del., vol. 21, no. 1, pp. 23-29, Jan. 2006 https://doi.org/10.1109/TPWRD.2005.860244
  8. S. Li and M. Ding, 'The vulnerability analysis of transmission system based on the performance of mho relay and SVC', Int. J. Emerging Electric Power Syst., vol. 8, no. 1, 1-15, 2007
  9. S. Li, N. Yorino, and Y. Zoka, 'Controllability analysis for operation margin of zone 3 impedance relay', IEEJ Trans. Power and Energy, vol. 127, no. 3, 502-506, Mar. 2007 https://doi.org/10.1541/ieejpes.127.502
  10. S. Li, N. Yorino, and Y. Zoka, 'Operation margin analysis of zone 3 impedance relay based on sensitivities to power injection', IET Gener. Transm. and Distrib., vol. 1, no. 2, pp. 312-317, Mar. 2007 https://doi.org/10.1049/iet-gtd:20060083
  11. NERC. (2005). Working Paper on a Proposed Transmission Relay Loadability Standard. Online. Available: http://www.nerc.com
  12. AREVA-TD, PRAG Network Protection & Automation Guide. Online. Available: http://www. areva-td.com
  13. D. Tziouvaras. Relay Performance during Major System Disturbances. Online. Available: www.selinc. com
  14. G. Gangadharan and A. Anbalagan, 'Microprocessor based three step quadrilateral distance relay for the protection of EHV/UHV transmission line', IEEE Trans. Power Del., vol. 7, no. 1, pp. 91-97, Jan. 1992 https://doi.org/10.1109/61.108894
  15. J. He, Y. Li, B. Li, Z. Guo, and X. Dong, 'Relay protection for UHV transmission lines, part II disposition of relay protection', Automation of Electric Power Syst., vol. 26, no. 24, pp. 1-6, Dec. 2002