Smart inadvertent islanding detection employing p-type μPMU for an active distribution network

Smart inadvertent islanding detection employing p-type μPMU for an active distribution network

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In the smart-grid paradigm, since distribution systems are controlled by various independent operators, it becomes inevitable for all dispatchers to have a wide-area view of the network for situational awareness and protection. This visualisation is accomplished with the aid of protection (p) type micro-phasor measurement unit (μPMU) installed at the bus of the respective distributed generation (DG). One of the pressing issues with DG's is the concern of inadvertent islanding that disrupts orderly reconnection besides posing hazards to utility workers. In view of this, this study proposes a real-time inadvertent islanding detection by μPMU. The voltage and current phasors obtained from these μPMUs by discrete Fourier transform are further processed by Fortescue transform to compute the angle of sequence components. The absolute angle difference between positive and zero components is used to initiate signal for accomplishing intelligent islanding under islanded condition. The simulation results prove the method to be robust, computationally efficient, non-detection zone free and feasible. Most significantly, as measuring equipment and relay are already present in p type μPMU, therefore unlike other detection methods, no extra arrangements are required in this method making it economically viable and easy to implement.


    1. 1)
      • 1. Cossent, R., Gómez, T., Frías, P.: ‘Towards a future with large penetration of distributed generation: Is the current regulation of electricity distribution ready? Regulatory recommendations under a european perspective’, Energy. Policy., 2009, 37, (3), pp. 11451155.
    2. 2)
      • 2. Dyśko, A., Booth, C., Anaya-Lara, O., et al: ‘Reducing unnecessary disconnection of renewable generation from the power system’, IET Renew. Power Gener., 2007, 1, (1), pp. 4148.
    3. 3)
      • 3. Katiraei, F., Iravani, M.R., Lehn, P.W.: ‘Micro-grid autonomous operation during and subsequent to islanding process’, IEEE Trans. Power Deliv., 2005, 20, (1), pp. 248257.
    4. 4)
      • 4. Dutta, S., Sadhu, P.K., Reddy, M.J.B., et al: ‘Shifting of research trends in islanding detection method – a comprehensive survey’, Protection Control Modern Power Syst., 2018, 3, (1), p. 1.
    5. 5)
      • 5. Redfern, M.A., Usta, O., Fielding, G.: ‘Protection against loss of utility grid supply for a dispersed storage and generation unit’, IEEE Trans. Power Deliv., 1993, 8, (3), pp. 948954.
    6. 6)
      • 6. Freitas, W., Xu, W., Affonso, C.M., et al: ‘Comparative analysis between ROCOF and vector surge relays for distributed generation applications’, IEEE Trans. Power Deliv., 2005, 20, (2), pp. 13151324.
    7. 7)
      • 7. Pai, F.S., Huang, S.J.: ‘A detection algorithm for islanding-prevention of dispersed consumer-owned storage and generating units’, IEEE Trans. Energy Convers., 2001, 16, (4), pp. 346351.
    8. 8)
      • 8. Jang, S.I., Kim, K.H.: ‘An islanding detection method for distributed generations using voltage unbalance and total harmonic distortion of current’, IEEE Trans. Power Deliv., 2004, 19, (2), pp. 745752.
    9. 9)
      • 9. Liu, F., Kang, Y., Zhang, Y., et al: ‘Improved SMS islanding detection method for grid-connected converters’, IET Renew. Power Gener., 2010, 4, (1), pp. 3642.
    10. 10)
      • 10. Lopes, L.A., Sun, H.: ‘Performance assessment of active frequency drifting islanding detection methods’, IEEE Trans. Energy Convers., 2006, 21, (1), pp. 171180.
    11. 11)
      • 11. Trujillo, C.L., Velasco, D., Figueres, E., et al: ‘Analysis of active islanding detection methods for grid-connected microinverters for renewable energy processing’, Applied Energy, 2010, 87, (11), pp. 35913605.
    12. 12)
      • 12. Karimi, H., Yazdani, A., Iravani, R.: ‘Negative-sequence current injection for fast islanding detection of a distributed resource unit’, IEEE Trans. Power Electr., 2008, 23, (1), pp. 298307.
    13. 13)
      • 13. Samui, A., Samantaray, S.R.: ‘Wavelet singular entropy-based islanding detection in distributed generation’, IEEE Trans. Power Deliv., 2013, 28, (1), pp. 411418.
    14. 14)
      • 14. Mohanty, S.R., Kishor, N., Ray, P.K., et al: ‘Comparative study of advanced signal processing techniques for islanding detection in a hybrid distributed generation system’, IEEE Trans. Sustain. Energy, 2015, 6, (1), pp. 122131.
    15. 15)
      • 15. Sánchez-Ayala, G., Agüerc, J.R, Elizondo, D., et al: ‘Current trends on applications of PMUs in distribution systems’. EEE PES Innovative Smart Grid Technologies Conf., February 2013, pp. 16.
    16. 16)
      • 16. Jamei, M., Scaglione, A., Roberts, C., et al: ‘Automated anomaly detection in distribution grids using μPMU measurements’. Hawaii Int. Conf. on System Sciences, 2017, pp. 31843193.
    17. 17)
      • 17. Meier, A.V., Culler, D., McEachern, A., et al: ‘Micro-synchrophasors for distribution systems’. IEEE Innovative Smart Grid Technologies Conf., February 2014, pp. 15.
    18. 18)
      • 18. Phadke, A.G., Thorp, J.S.: ‘History and applications of phasor measurements’. IEEE Power Systems Conf. and Exposition, 2006, pp. 331335.
    19. 19)
      • 19. Liang, Z., Abur, A.: ‘Multi area state estimation using synchronized phasor measurements’, IEEE Trans. Power Syst., 2005, 20, (2), pp. 611617.
    20. 20)
      • 20. Murthy, C., Mishra, A., Ghosh, D., et al: ‘Reliability analysis of phasor measurement unit using hidden Markov model’, IEEE Syst. J., 2014, 8, (4), pp. 12931301.
    21. 21)
      • 21. Carta, A., Locci, N., Muscas, C., et al: ‘A flexible GPS-based system for synchronized phasor measurement in electric distribution networks’, IEEE Trans. Instrum. Meas., 2008, 57, (11), pp. 24502456.
    22. 22)
      • 22. Borghetti, A., Nucci, C.A., Paolone, M., et al: ‘Synchronized phasors monitoring during the islanding maneuver of an active distribution network’, IEEE Trans. Smart Grid, 2011, 2, (1), pp. 8291.
    23. 23)
      • 23. Kersting, W.H.: ‘Radial distribution test feeders’. IEEE Power Engineering Society Winter Meeting, 2001, pp. 908912.
    24. 24)
      • 24. Menon, V.K., Nehrir, M.H.: ‘A hybrid islanding detection technique using voltage unbalance and frequency set point’, IEEE Trans. Power Syst., 2007, 22, (1), pp. 442448.
    25. 25)
      • 25. Phadke, A.G., Kasztenny, B.: ‘Synchronized phasor and frequency measurement under transient conditions’, IEEE Trans. Power Deliv., 2009, 24, (1), pp. 8995.
    26. 26)
      • 26. Fortescue, C.L.: ‘Method of symmetrical co-ordinates applied to the solution of polyphase networks’, Trans. Am. Inst. Electr. Eng., 1918, 37, (2), pp. 10271140.
    27. 27)
      • 27. Meier, A.V., Stewart, E., McEachern, A., et al: ‘Precision micro-synchrophasors for distribution systems: a summary of applications’, IEEE Trans. Smart Grid, 2017, 8, (6), pp. 29262936.
    28. 28)
      • 28. Paz, M.C.R., Ferraz, R.G., Bretas, A.S., et al: ‘System unbalance and fault impedance effect on faulted distribution networks’, Comput. Math. Appl., 2010, 60, (4), pp. 11051114.
    29. 29)
      • 29. Phadke, A.G., Thorp, J.S. (Eds.): ‘Phasor estimation at off-nominal frequency inputs’, in ‘Synchronized phasor measurements and their applications’ (Springer Publication, New York, NY, USA, 2008), pp. 4979.
    30. 30)
      • 30. Teng, J.H.: ‘A direct approach for distribution system load flow solutions’, IEEE Trans. Power Deliv., 2003, 18, (3), pp. 882887.
    31. 31)
      • 31. Teng, J.H.: ‘Modelling distributed generations in three-phase distribution load flow’, IET Gener. Transm. Distrib., 2008, 2, (3), pp. 330340.
    32. 32)
      • 32. Teng, J.H.: ‘Fast short circuit analysis method for unbalanced distribution systems’. IEEE Power Engineering Society General Meeting, 2003, pp. 240245.
    33. 33)
      • 33. Phadke, A.G., Thorp, J.S. (Eds.): ‘Protection systems with phasor inputs’, in ‘Synchronized phasor measurements and their applications’ (Springer Publication, New York, NY, USA, 2008), pp. 197221.

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