S. Kouhi, M. Ranjbar, M. Mohammadian, and M. Khavaninzadeh, "Economic aspect of fuel cell power as distributed generation," 2014. N. A. Ashtiani, M. Gholami, and G. Gharehpetian, "Optimal allocation of energy storage systems in connected microgrid to minimize the energy cost," in Electrical Power Distribution Networks (EPDC), 2014 19th Conference on, 2014, pp. 25-28: IEEE. M. Redfern, O. Usta, and G. Fielding, "Protection against loss of utility grid supply for a dispersed storage and generation unit," IEEE transactions on power delivery, vol. 8, no. 3, pp. 948-954, 1993. W. Xu, K. Mauch, and S. Martel, "An Assessment of DG Islanding Detection Methods and Issues for Canada, report# CETC-Varennes 2004-074 (TR), CANMET Energy Technology Centre–Varennes," Natural Resources Canada, 2004. G.-K. Hung, C.-C. Chang, and C.-L. Chen, "Automatic phase-shift method for islanding detection of grid-connected photovoltaic inverters," IEEE Transactions on energy conversion, vol. 18, no. 1, pp. 169-173, 2003. H. Zeineldin and S. Kennedy, "Sandia frequency-shift parameter selection to eliminate nondetection zones," IEEE Transactions on Power Delivery, vol. 24, no. 1, pp. 486-487, 2009. H. Zeineldin and S. Conti, "Sandia frequency shift parameter selection for multi-inverter systems to eliminate non-detection zone," IET Renewable Power Generation, vol. 5, no. 2, pp. 175-183, 2011. H. H. Zeineldin and M. M. Salama, "Impact of load frequency dependence on the NDZ and performance of the SFS islanding detection method," IEEE Transactions on Industrial Electronics, vol. 58, no. 1, pp. 139-146, 2011.  L. A. Lopes and H. Sun, "Performance assessment of active frequency drifting islanding detection methods," IEEE Transactions on Energy Conversion, vol. 21, no. 1, pp. 171-180, 2006.  P. Du, Z. Ye, E. E. Aponte, J. K. Nelson, and L. Fan, "Positive-feedback-based active anti-islanding schemes for inverter-based distributed generators: basic principle, design guideline and performance analysis," IEEE transactions on power electronics, vol. 25, no. 12, pp. 2941-2948, 2010.  A. Yafaoui, B. Wu, and S. Kouro, "Improved active frequency drift anti-islanding detection method for grid connected photovoltaic systems," IEEE transactions on power electronics, vol. 27, no. 5, pp. 2367-2375, 2012.  H. Karimi, A. Yazdani, and R. Iravani, "Negative-sequence current injection for fast islanding detection of a distributed resource unit," IEEE Transactions on power electronics, vol. 23, no. 1, pp. 298-307, 2008.  M. E. Ropp, M. Begovic, A. Rohatgi, G. A. Kern, R. Bonn, and S. Gonzalez, "Determining the relative effectiveness of islanding detection methods using phase criteria and nondetection zones," IEEE transactions on energy conversion, vol. 15, no. 3, pp. 290-296, 2000.  T. Funabashi, K. Koyanagi, and R. Yokoyama, "A review of islanding detection methods for distributed resources," in Power Tech Conference Proceedings, 2003 IEEE Bologna, 2003, vol. 2, p. 6 pp. Vol. 2: IEEE.  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, pp. 745-752, 2004.  W. Freitas, Z. Huang, and W. Xu, "A practical method for assessing the effectiveness of vector surge relays for distributed generation applications," IEEE Transactions on Power Delivery, vol. 20, no. 1, pp. 57-63, 2005.  M. T. Hagh and N. Ghadimi, "Radial basis neural network based islanding detection in distributed generation," International Journal of Engineering-Transactions A: Basics, vol. 27, no. 7, pp. 1061-1070, 2013.  H. Zeineldin and J. L. Kirtley, "Performance of the OVP/UVP and OFP/UFP method with voltage and frequency dependent loads," 2009.  B.-Y. Bae, J.-K. Jeong, J.-H. Lee, and B.-M. Han, "Islanding detection method for inverter-based distributed generation systems using a signal cross-correlation scheme," Journal of Power Electronics, vol. 10, no. 6, pp. 762-768, 2010.