A New Method to Detect Line-to-Ground Faults in DC Microgrids Using Instantaneous Power Changes
Subject Areas : electrical and computer engineering
Said Abbasi
1
,
N. Ghaffarzadeh
2
1 -
2 - Imam Khomeini International University
Keywords: DC microgridnon-unit protectionline to ground faultinstantaneous power changesfault detection,
Abstract :
With the increasing of sensitive loads such as data centers, the use of DC microgrids has increased. Line to ground fault is the most common type of fault in this type of microgrid, which causes various damages to the DC microgrid. One of the most important challenges in operating a DC microgrid is the lack of effective protection against this faults type. In this paper, by using local measurements such as voltage and current at the beginning of each line, the instantaneous power changes in them are computed and a new protection scheme that is not based on any communication line is presented. The proposed protection scheme has good accuracy and speed of operation and is able to detect line-to-ground faults in DC microgrids with high-speed. The accuracy and precision of the protection scheme has been tested under different conditions.
[1] W. Javed and D. Chen, "Low voltage DC microgrid protection system-a review," in Proc. IEEE 53rd Int. Universities Power Engineering Conf., UPEC’18, 6 pp., Glasgow, UK, 4-7 Sept. 2018.
[2] M. Starke, L. Tolbert, and B. Ozpineci, "AC vs. DC distribution: a loss comparison," in Proc. IEEE/PES Transmission Distribustion Conf. Exposition, 7 pp., Chicago, IL, USA, 21-24 Apr. 2008.
[3] Q. Deng, Fault Protection in DC Microgrids Based on Autonomous Operation of All Components, Ph.D. Diss., University of South Carolina, 2017.
[4] S. A. Amamra, H. Ahmed, and R. A. El-Sehiemy, "Firefly algorithm optimized robust protection scheme for DC microgrid," Electric Power Components and Systems, vol. 45, no. 10, pp. 1141-1151, Jul. 2017.
[5] D. Salomonsson, L. Soder, and A. Sannino, "Protection of low-voltage DC microgrids," IEEE Trans. on Power Delivery, vol. 24, no. 3, pp. 1045-1053, Jul. 2009.
[6] M. Ghaffarpour Jahromi, G. Mirzaeva, S. D. Mitchell, and D. Gay, "Advanced fault tolerance strategy for DC microgrids in mining excavators," in Proc. IEEE 24th Int. Symp. on Industrial Electronics, ISIE’15, pp. 1502-1507, Buzios, Brazil, 3-5 Jun. 2015.
[7] J. Park, J. Candelaria, L. Ma, and K. Dunn, "DC ring-bus microgrid fault protection and identification of fault location," IEEE Trans. on Power Delivery, vol. 28, no. 4, pp. 2574-2584, Oct. 2013.
[8] S. D. A. Fletcher, P. J. Norman, K. Fong, S. J. Galloway, and G. M. Burt, "High-speed differential protection for smart DC distribution systems," IEEE Trans. Smart Grid, vol. 5, no. 5, pp. 2610-2617, Sept. 2014.
[9] N. Bayati, A. Hajizadeh, and M. Soltani, "Protection in DC microgrids: a comparative review," IET Smart Grid, vol. 1, no. 3, pp. 66-75, Oct. 2018.
[10] S. D. A. Fletcher, P. J. Norman, S. J. Galloway, P. Crolla, and G. M. Burt, "Optimizing the roles of unit and non-unit protection methods within DC microgrids," IEEE Trans. Smart Grid, vol. 3, no. 4, pp. 2079-2087, Dec. 2012.
[11] G. Madingou, M. Zarghami, and M. Vaziri, "Fault detection and isolation in a DC microgrid using a central processing unit," in Proc. IEEE Power & Energy Society Innovative Smart Grid Technologies Conf., ISGT’15, 5 pp., Washington, DC, USA, 18-20 Feb. 2015.
[12] L. Tang and B. Ooi, "Locating and isolating DC faults in multi-terminal DC systems," IEEE Trans. Power Del., vol. 22, no. 3, pp. 1877-1884, Jul. 2007.
[13] A. Meghwani, S. Chakrabarti, and S. C. Srivastava, "A fast scheme for fault detection in DC microgrid based on voltage prediction," in Proc. National Power Systems Conf., NPSC’16, 6 pp., Bhubaneswar, India, 19-21 Dec. 2016.
[14] V. Nougain, V. Nougain, and S. Mishra, "Low-voltage DC ring-bus microgrid protection with rolling mean technique," in Proc. IEEMA Engineer Infinite Conf., eTechNxT’18, 6 pp., New Delhi, India, 13-14 Mar. 2018.
[15] A. Meghwani, S. C. Srivastava, and S. Chakrabarti, "A non-unit protection scheme for DC microgrid based on local measurements," IEEE Trans. on Power Delivery, vol. 32, no. 1, pp. 172-181, Feb. 2017.
[16] K. A. Saleh, A. Hooshyar, and E. F. El-Saadan, "Hybrid passive-over current relay for detection of faults in low-voltage DC grids," IEEE Trans. on Smart Grid, vol. 8, no. 3, pp. 1129-1138, May 2017.
[17] S. Azizi, M. Sanaye Pasand, M. Abedini, and A. Hasani, "A traveling-wave based methodology for wide-area fault location in multiterminal DC systems," IEEE Trans. on Power Delivery, vol. 29, no. 6, pp. 2252-2260, Dec. 2014.
[18] J. Yang, J. E. Fletcher, and J. O'Reilly, "Short-circuit and ground fault analyses and location in VSC-based DC network cables," IEEE Trans. on Industrial Electronics, vol. 59, no. 10, pp. 3827-3837, Oct. 2012.
