L. Erickson, “Reducing greenhouse gas emissions and improving air quality: Two global challenges”, Environ. Prog. Sustainable Energy, vol. 36, pp. 982-988, 2017.
 F. Salah, J. Ilg, C. Flath, H. Basse and C. Dinther, “Impact of electric vehicles on distribution substations: A Swiss case study”, Appl. Energy, vol. 137, pp.88-96, 2015.
 H. Rashidizadeh, H. Najafi, A. Moghaddam and J. Guerrero, “Optimal decision making framework of an electric vehicle aggregator in future and pool markets”, J. Oper. Autom. Power Eng., vol. 6, pp. 157-168, 2018.
 K. Hedegaard, H. Ravn, N. Juul and P. Meibom, “Effects of electric vehicles on power systems in Northern Europe”, Energy, vol. 48, pp.356-368, 2012.
 H. Lund and W. Kempton, “Integration of renewable energy into the transport and electricity sectors through V2G”, Energy Policy, vol. 36, pp. 3578-3587, 2008.
 K. Tan, V. Ramachandaramurthy and J. Yong, “Integration of electric vehicles in smart grid: A review on vehicle to grid technologies and optimization techniques”, Renewable Sustainable Energy, vol. 53, pp.720-732, 2016.
 M. Sarker, Y. Dvorkin and M. Vazquez, “Optimal participation of an electric vehicle aggregator in day-ahead energy and reserve markets”, IEEE Trans. Power Syst., vol. 31, pp. 3506-3515, 2016.
 A. Akbarimajd
, M. Olyaee
, H. Shayeghi
and B. Sobhani
, “Distributed multi-agent load frequency control for a large-scale power system optimized by grey wolf optimizer, J. Oper. Autom. Power Eng.
, vol. 5, pp. 151-162, 2017.
 S. Saxena, “Load frequency control strategy via fractional-order controller and reduced-order modeling”, Elect Power & Energy Syst., vol. 104, pp. 603-614, 2019.
 H. Jia, X. Li, Y. Mu, C. Xu, Y. Jiang, X. Yu, J. Wu and C. Dong, “Coordinated control for EV aggregators and power plants in frequency regulation considering time-varying delays”, Applied Energy, vol. 210, pp. 1363-1376, 2018.
 T. Pham and H. Trinh, “Load frequency control of power systems with electric vehicles and diverse transmission links using distributed functional observers”, IEEE Trans. Smart Grid, vol. 7, pp. 238-252, 2016.
 H. Liu, Z. Hu, Y. Song, J. Wang and X. Xie, “Vehicle-to-grid control for supplementary frequency regulation considering charging demands”, IEEE Trans. Power Syst., vol. 30, pp. 3110-3119, 2015.
 T. Masuta and A. Yokoyama, “Supplementary load frequency control by use of a number of both electric vehicles and heat pump water heaters”, IEEE Trans. Smart Grid, vol. 3, pp. 1253-1262, 2013.
 M. Gheisarnejad and M. Khooban, “Secondary load frequency control for multi-microgrids: HiL real-time simulation”, Soft Comput., vol. 23, pp. 5785–5798, 2019.
 H. Ali, G. Magdy, B. Li, G. Shabib, A. Elbaset, D. Xu and Y. Mitani, “A new frequency control strategy in an islanded microgrid using virtual inertia control-based coefficient diagram method”, IEEE Access., vol. 7, pp.16979- 16990, 2019.
 M. Khooban, T. Niknam, M. Shasadeghi, T. Dragicevic and F. Blaabjerg, “Load frequency control in microgrids based on a stochastic noninteger controller”, IEEE Trans. Sustainable Energy, vol. 9, pp. 853-861, 2018.
 A. Safari, F. Babaei and M. Farrokhifar, “A load frequency control using a PSO-based ANN for micro-grids in the presence of electric vehicles”, Int. J. Ambient Energy, pp.1-13, 2019.
 T. Pham, S. Nahavandi, H. Trinh and K. Wong, “Static output feedback frequency stabilization of time-delay power systems with coordinated electric vehicles state of charge control”, IEEE Trans. Power Syst., vol. 32, pp. 3862-3874, 2017.
 S. Debbarma and A. Dutta, “Utilizing electric vehicles for LFC in restructured power systems using fractional order controller”, IEEE Trans. Smart Grid., vol. 8, pp. 2554-2564, 2017.
 H. Fan, L. Jiang, C. Zhang and C. Mao, “Frequency regulation of multi-area power systems with plug-in electric vehicles considering communication delays”, IET Gener. Transm. Distrib., vol. 10, pp. 3481-3491, 2016.
 S. Debbarma and A. Dutta, “Utilizing electric vehicles for LFC in restructured power systems using fractional order controller”, IEEE Trans. Smart Grid, vol. 8, pp. 2554-2564, 2017.
 V. Çelik, M. Özdemir and G. Bayrak, “The effects on stability region of the fractional-order PI controller for one-area time-delayed load–frequency control systems”, Trans. Inst. Meas. Control, vol. 39, pp. 1509-1521, 2017.
 P. Ojaghi and M. Rahmani, “LMI-based robust predictive load frequency control for power systems with communication delays”, IEEE Trans. Power Syst., vol. 32, pp. 4091-4100, 2017.
 K. Ko and D. Sung, “The effect of EV aggregators with time-varying delays on the stability of a load frequency control system," IEEE Trans. Power Syst., vol. 33, pp. 669-680, 2018.
 S. Mirjalili, “SCA: a sine cosine algorithm for solving optimization problems”. Knowl. Syst., vol. 96, pp. 120-133, 2016.
 R. Khezri, A. Oshnoei, M. Tarafdar and S. Muyeen, “Coordination of heat pumps, electric vehicles and AGC for efficient LFC in a smart hybrid power system via SCA-based optimized FOPID controllers”, Energies, vol. 11, pp. 420-441, 2018.