Frequency and Voltage Stability of the Islanded Microgrid with Multi DC-BUS Based-Inverter using Droop Control

Document Type : Research paper

Authors

1 Department of Electrical Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran

2 Department of Electrical Engineering, Shahid Chmaran University of Ahvaz, Ahvaz, Iran

Abstract

The widespread adoption of microgrids in electric power systems has brought numerous advantages such as decentralized control, reliability, cost-effectiveness, and environmental benefits. However, one of the most critical challenges faced by islanded microgrids is ensuring frequency and voltage stability. This paper addresses these stability issues that arise when microgrids operate independently, disconnected from the main network through the point of common coupling (PCC). These microgrids rely on renewable resources like photovoltaic (PV) systems, wind turbines, and energy storage systems, which often require DC to AC conversion through inverters to simulate synchronous generators. To overcome the frequency and voltage stability challenges, this research utilizes the droop control technique to regulate the active and reactive power of distribution generators (DGs). The droop control technique is implemented and simulated using MATLAB software, specifically employing a multi-DC bus-based inverter. The simulation results demonstrate that the DGs successfully supply the required total power to meet load demands while maintaining frequency and voltage stability. Through the droop control technique, active and reactive power sharing is achieved, ensuring stability at nominal values. The DGs can effectively maintain a constant power profile at desired values, even in the presence of static and dynamic loads.

Keywords

References

  1. Twaisan and N. Barıs¸çı, “Integrated distributed energy resources (der) and microgrids: Modeling and optimization of ders,” Electronics, vol. 11, no. 18, p. 2816, 2022.
  2. Mohebbi-Gharavanlou, S. Nojavan, and K. Zareh, “Energy management of virtual power plant to participate in the electricity market using robust optimization,” J. Oper. Autom. Power Eng., vol. 8, no. 1, pp. 43–56, 2020.
  3. Ali, Z. Zheng, M. Aillerie, J.-P. Sawicki, M.-C. Pera, and D. Hissel, “A review of dc microgrid energy management systems dedicated to residential applications,” Energies, vol. 14, no. 14, p. 4308, 2021.
  4. Khan, N. Islam, S.K. Das, S. Muyeen, S.I. Moyeen, M.F. Ali, Z. Tasneem, M.R. Islam, D.K. Saha, M.F.R. Badal, et al., “Energy sustainability–survey on technology and control of microgrid, smart grid and virtual power plant,” IEEE Access, vol. 9, pp. 104663–104694, 2021.
  5. Venkata, V. Pandya, and A. Sant, “Data mining model based differential microgrid fault classification using svm considering voltage and current distortions,” J. Oper. Autom. Power Eng., vol. 11, no. 3, pp. 162–172, 2023.
  6. Fathi, Q. Shafiee, and H. Bevrani, “Robust frequency control of microgrids using an extended virtual synchronous generator,” IEEE Trans. Power Syst., vol. 33, no. 6, pp. 6289–6297, 2018.
  7. Y. Yap, C.R. Sarimuthu, and J.M.-Y. Lim, “Virtual inertia-based inverters for mitigating frequency instability in grid-connected renewable energy system: A review,” Appl. Sci., vol. 9, no. 24, p. 5300, 2019.
  8. Madiba, R. Bansal, N. Mbungu, M. Bettayeb, R. Naidoo, and M. Siti, “Under-frequency load shedding of microgrid systems: a review,” Int. J. Model. Simul., vol. 42, no. 4, pp. 653–679, 2022.
  9. Singh, S. Prakash Singh, K. Shanker Verma, A. Iqbal, and B. Kumar, “Recent control techniques and management of ac microgrids: A critical review on issues, strategies, and future trends,” Int. Trans. Electr. Energy Syst., vol. 31, no. 11, p. e13035, 2021.
  10. -C. Zhong, “Robust droop controller for accurate proportional load sharing among inverters operated in parallel,” IEEE Trans. Ind. Electron., vol. 60, no. 4, pp. 1281–1290, 2011.
  11. Sun, X. Hou, J. Yang, H. Han, M. Su, and J.M. Guerrero, “New perspectives on droop control in ac microgrid,” IEEE Trans. Ind. Electron., vol. 64, no. 7, pp. 5741–5745, 2017.
  12. M. Bouzid, J.M. Guerrero, A. Cheriti, M. Bouhamida, P. Sicard, and M. Benghanem, “A survey on control of electric power distributed generation systems for microgrid applications,” Renew. Sustain. Energy Rev., vol. 44, pp. 751– 766, 2015.
  13. G. Photovoltaics and E. Storage, “Ieee guide for design, operation, and integration of distributed resource island systems with electric power systems,” 2011.
  14. Alghamdi, H.F. Sindi, A. Al-Durra, A.A. Alhussainy, M. Rawa, H. Kotb, and K.M. AboRas, “Reduction in voltage harmonics of parallel inverters based on robust droop controller in islanded microgrid,” Mathematics, vol. 11, no. 1, p. 172, 2023.
  15. Ilyushin, V. Volnyi, K. Suslov, and S. Filippov, “Stateof-the-art literature review of power flow control methods for low-voltage ac and ac-dc microgrids,” Energies, vol. 16, no. 7, p. 3153, 2023.
  16. Bruno, G. Giannoccaro, C. Iurlaro, M. La Scala, and C. Rodio, “Power hardware-in-the-loop test of a low-cost synthetic inertia controller for battery energy storage system,” Energies, vol. 15, no. 9, p. 3016, 2022.
  17. Zhou, L. Liu, H. Li, and L. Wang, “Real time digital simulation (rtds) of a novel battery-integrated pv system for high penetration application,” in The 2nd IEEE Int. Symp. Power Electron. Gener., pp. 786–790, IEEE, 2010.
  18. C. Vasquez, J.M. Guerrero, M. Savaghebi, J. Eloy-Garcia, and R. Teodorescu, “Modeling, analysis, and design of stationary-reference-frame droop-controlled parallel threephase voltage source inverters,” IEEE Trans. Ind. Electron., vol. 60, no. 4, pp. 1271–1280, 2012.
  19. Khajehzadeh, M. Amirinejad, and S. Rafieisarbejan, “An introduction to inverters and applications for system design and control wave power,” Int. J. Sci. Eng. Res., vol. 5, no. 7, 2014.
  20. B. Cheema, S.A. Hasnain, M.M. Ahsan, M. Umer, and G. Ahmad, “Comparative analysis of spwm and square wave output filtration based pure sine wave inverters,” in 2015 IEEE 15th International Conference on Environment and Electrical Engineering (EEEIC), pp. 38–42, IEEE, 2015.
  21. M. Guerrero, J.C. Vasquez, J. Matas, L.G. De Vicuña, and M. Castilla, “Hierarchical control of droop-controlled ac and dc microgridsa general approach toward standardization,” IEEE Trans. Ind. Electron., vol. 58, no. 1, pp. 158–172, 2010.
  22. Bidram and A. Davoudi, “Hierarchical structure of microgrids control system,” IEEE Trans. Smart Grid, vol. 3, no. 4, pp. 1963–1976, 2012.
  23. M. Guerrero, L. Hang, and J. Uceda, “Control of distributed uninterruptible power supply systems,” IEEE Trans. Ind. Electron., vol. 55, no. 8, pp. 2845–2859, 2008.
  24. M. Guerrero, J.C. Vasquez, J. Matas, M. Castilla, and L.G. de Vicuña, “Control strategy for flexible microgrid based on parallel line-interactive ups systems,” IEEE Trans. Ind. Electron., vol. 56, no. 3, pp. 726–736, 2008.
  25. Rokrok and M.E.H. Golshan, “Adaptive voltage droop scheme for voltage source converters in an islanded multibus microgrid,” IET Gener. Transm. Distrib., vol. 4, no. 5, pp. 562–578, 2010.
  26. P. Lopes, C.L. Moreira, and A. Madureira, “Defining control strategies for microgrids islanded operation,” IEEE Trans. Power Syst., vol. 21, no. 2, pp. 916–924, 2006.
  27. Monica, M. Kowsalya, and P. Tejaswi, “Load sharing control of parallel operated single phase inverters,” Energy procedia, vol. 117, pp. 600–606, 2017.
Journal of Operation and Automation in Power Engineering

Articles in Press, Corrected Proof
Available Online from 06 July 2023

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History

  • Receive Date: 09 February 2023
  • Revise Date: 04 June 2023
  • Accept Date: 08 June 2023

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