High-accuracy power sharing in parallel inverters in an islanded microgrid using modified sliding mode control approach

Document Type : Article

Authors

1 Faculty of Electrical Engineering, Shiraz University of Technology, Shiraz, Islamic Republic of Iran

2 Faculty of Electrical Engineering, Shiraz University of Technology, Shiraz, Islamic Republic of Iran.

Abstract

Increasing the penetration level of distributed generation (DG) units in micro grids which feeds the large loads in parallel connections creates the concept of power sharing phenomena in recent researches. In island mode of micro grid the voltage and the frequency control are done using the high inertia inverter. Therefore, the internal control loop is executed in such way to avoid all of DGs not to be overloaded. consequently, the reactive power-sharing error is eliminated and the voltage is also kept constant within the permissible range. This paper, presents a modified control method based on sliding mode approach. The proposed control method is tested using several different disturbances and three scenarios. Also, the fractional order calculus is applied to proposed control strategy to increase the convergence speed and the system accuracy. finally, the proposed method is compared to other well-known controlling approaches while the achieved results confirms the superiority of proposed one.

Keywords

References

  1. Refrences:

    1. Akhavan, A. and Mohammadi, H.R. A new control method for grid-connected quasi-Z-source multilevel inverter based photovoltaic system", Scientia Iranica, Transactions D, Computer Science & Engineering, Electrical, 22(6), p. 2505 (2015).
    2. Akhbari, A. and Rahimi, M. Performance and stability analysis of grid connected single phase inverters used in solar photovoltaic systems", Scientia Iranica, Transactions D, Computer Science & Engineering, Electrical, 26(3), pp. 1637{1651 (2017).
    3. Farahani, H.F., Khalili, M., Rabiee, A., et al. On the application of plug-in hybrid electric vehicle to compensate network harmonics: A multiobjective approach", Scientia Iranica, Transaction D, Computer Science and Engineering, Electrical, 21(6), pp. 2177{ 2185 (2014).
    4. Asad, R. and Kazemi, A. A novel practical fair nodal price for DC microgrids and distribution systems" Scientia Iranica, Transaction D, Computer Science & Engineering, Electrical, 21(6), pp. 2232{2242 (2014).
    5. D'Arco, S. and Suul, J.A. Equivalence of virtual synchronous machines and frequency-droops for converterbased microgrids", IEEE Transactions on Smart Grid, 5(1), pp. 394{395 (2014). 6. Fang, T., Shen, L., He, W., et al. Distributed control and redundant technique to achieve superior reliability for fully modular input-series-output-parallel inverter system", IEEE Transactions on Power Electronics, 32(1), pp. 723{735 (2017). 7. Cingoz, F., Elrayyah, A., and Sozer, Y. Optimized droop control parameters for e_ective load sharing and voltage regulation in DC microgrids", Electric Power Components and Systems, 43(8{10), pp. 879{ 889 (2015). 8. de Souza, W.F., Severo-Mendes, M.A., and Lopes, L.A. Power sharing control strategies for a threephase microgrid in di_erent operating condition with droop control and damping factor investigation", IET Renewable Power Generation, 9(7), pp. 831{839 (2015). 9. Nasirian, V., Sha_ee, Q., Guerrero, J.M., et al. Droop-free distributed control for AC microgrids", IEEE Transactions on Power Electronics, 31(2), pp. 1600{1617 (2016). 10. Palizban, O. and Kauhaniemi, K. Hierarchical control structure in microgrids with distributed generation: Island and grid-connected mode", Renewable and Sustainable Energy Reviews, 44(1), pp. 797{813 (2015). 11. Milczarek, A., Malinowski, M., and Guerrero, J.M. Reactive power management in islanded microgrid- Proportional power sharing in hierarchical droop control", IEEE Transactions on Smart Grid, 6(4), pp. 1631{1638 (2015). 12. Gudey, S.K. and Gupta, R. Recursive fast terminal sliding mode control in voltage source inverter for M.A. Bina et al./Scientia Iranica, Transactions D: Computer Science & ... 27 (2020) 3128{3139 3139 a low-voltage microgrid system", IET Generation, Transmission and Distribution, 10(7), pp. 1536{1543 (2016). 13. Huang, Y.J., Kuo, T.C., and Chang, S.H. Adaptive sliding-mode control for nonlinearsystems with uncertain parameters", IEEE Transactions on Systems, Man, and Cybernetics, Part B (Cybernetics), 38(2), pp. 534{539 (2008). 14. Ghiasi, M.I., Golkar, M.A., and Hajizadeh, A. Lyapunov based-distributed fuzzy-sliding mode control for building integrated-DC microgrid with plug-in electric vehicle", Ieee Access, 5, pp. 7746{7752 (2017). 15. He, J., Li, Y.W., and Blaabjerg, F. An enhanced islanding microgrid reactive power, imbalance power, and harmonic power sharing scheme", IEEE Transactions on Power Electronics, 30(6), pp. 3389{3401 (2015). 16. Zhong, Q.C., Wang, Y., and Ren, B. UDE-based robust droop control of inverters in parallel operation", IEEE Transactions on Industrial Electronics, 64(9), pp. 7552{7562 (2017). 17. Han, H., Liu, Y., Sun, Y., et al. An improved droop control strategy for reactive power sharing in islanded microgrid", IEEE Transactions on Power Electronics, 30(6), pp. 3133{3141 (2015). 18. Mahmood, H., Michaelson, D., and Jiang, J. Accurate reactive power sharing in an islanded microgrid using adaptive virtual impedances", IEEE Transactions on Power Electronics, 30(3), pp. 1605{1617 (2015). 19. Guerrero, J.M., Loh, P.C., Lee, T.L., et al. Advanced control architectures for intelligent microgrids-Part II: Power quality, energy storage, and AC/DC microgrids", IEEE Transactions on Industrial Electronics, 60(4), pp. 1263{1270 (2013). 20. Krishnasamy, V.S., Mashayekhi, S., and Razzaghi, M. Numerical solutions of fractional di_erential equations by using fractional Taylor basis", IEEE/CAA Journal of Automatica Sinica, 4(1), pp. 98{106 (2017). 21. Bekir, A., Guner, O., and Cevikel, A. The expfunction method for some time-fractional di_erential equations", IEEE/CAA Journal of Automatica Sinica, 4(2), pp. 315{321 (2017). 22. Salehi, Y. and Schiesser, W.E. Numerical integration of space fractional partial di_erential equations: vol 2-applications from classical integer PDEs", Synthesis Lectures on Mathematics and Statistics, 9(3), pp. 1{ 205 (2017). 23. Patnaik, R.K. and Dash, P.K. Fast adaptive backstepping terminal sliding mode power control for both the rotor-side as well as grid-side converter of the doubly fed induction generator-based wind farms", IET Renewable Power Generation, 10(5), pp. 598{610 (2016). 24. Mobayen, S. An adaptive chattering-free PID sliding mode control based on dynamic sliding manifolds for a class of uncertain nonlinear systems", Nonlinear Dynamics, 82(1{2), pp. 53{60 (2015). 25. Gallegos, J.A. and Duarte-Mermoud, M.A. On the Lyapunov theory for fractional order systems", Applied Mathematics and Computation, 287, pp. 161{170 (2016).
Scientia Iranica
Volume 27, Issue 6 - Serial Number 6
Transactions on Computer Science & Engineering and Electrical Engineering (D)
November and December 2020
Pages 3128-3139

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