http://iet.metastore.ingenta.com
1887

Hierarchical control strategy for MVDC distribution network under large disturbance

Hierarchical control strategy for MVDC distribution network under large disturbance

For access to this article, please select a purchase option:

Buy article PDF
$19.95
(plus tax if applicable)
Buy Knowledge Pack
10 articles for $120.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Name:*
Email:*
Your details
Name:*
Email:*
Department:*
Why are you recommending this title?
Select reason:
 
 
 
 
 
IET Generation, Transmission & Distribution — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

The DC distribution technology brings challenges and opportunities to the penetration of large-scale distributed renewable energy sources. In a medium-voltage DC (MVDC) distribution network, operation mode switch occurs owing to some large disturbances. To manage these disturbances and achieve seamless switch of the operation mode, a hierarchical control strategy with two layers, namely local and global layers, is proposed in this work. The novel local layer controller called P–U–I controller is designed to enhance the voltage stability, improve system controllability and suppress overcurrent under large disturbances. This controller only needs local information and does not rely on fast communication. Furthermore, as the scale of the DC distribution network expands continuously, the number of system operation mode increases in geometric progression. Therefore, a global layer controller based on breadth-first search algorithm is proposed. This controller can automatically identify the system topology and adjust the control mode of converters to optimise the system operating characteristics. Thus, this hierarchical control strategy can accurately control the system power in steady state, suppress overcurrent under large disturbances and suit large-scale DC distribution networks. Finally, a three-terminal MVDC distribution network simulation model established on power systems computer-aided design and RT-LAB validates the proposed strategy.

References

    1. 1)
      • 1. Starke, M., Tolbert, L.M., Ozpineci, B.: ‘AC vs. DC distribution: a loss comparison’. Proc. Int. Conf. Transmission Distribution Conf. Exposition, Chicago, USA, April 2008, pp. 17.
    2. 2)
      • 2. Ma, J., Geng, G., Jiang, Q.: ‘Two-time-scale coordinated energy management for medium-voltage DC systems’, IEEE Trans. Power Syst., 2016, 31, (5), pp. 39713983.
    3. 3)
      • 3. Mohamed, Y.A.R.I., Zeineldin, H.H., Salama, M.M.A., et al: ‘Seamless formation and robust control of distributed generation microgrids via direct voltage control and optimized dynamic power sharing’, IEEE Trans. Power Electron., 2012, 27, (3), pp. 12831294.
    4. 4)
      • 4. Xing, P., Fu, L., Wang, G., et al: ‘Control strategy of seamless operation mode switch for AC/DC hybrid microgrid’. Proc. IEEE Int. Conf. Aircraft Utility Systems., Beijing, China, October 2016, pp. 10301034.
    5. 5)
      • 5. Li, X., Yuan, Z., Fu, J., et al: ‘Nanao multi-terminal VSC-HVDC project for integrating large-scale wind generation’. Proc. Int. Conf. PES General Meeting, National Harbor, MD, USA, July 2014, pp. 15.
    6. 6)
      • 6. Fu, J., Yuan, Z., Wang, Y., et al: ‘Control strategy of system coordination in Nanao multi-terminal VSC-HVDC project for wind integration’. Proc. Int. Conf. PES General Meeting, National Harbor, MD, USA, July 2014, pp. 15.
    7. 7)
      • 7. Zhao, B., Song, Q., Li, J., et al: ‘Full-process operation, control, and experiments of modular high-frequency-link DC transformer based on dual active bridge for flexible MVDC distribution: a practical tutorial’, IEEE Trans. Power Electron., 2017, 32, (9), pp. 67516766.
    8. 8)
      • 8. Zhao, B., Song, Q., Li, J., et al: ‘Modular multilevel high-frequency-link DC transformer based on dual active phase-shift principle for medium-voltage DC power distribution application’, IEEE Trans. Power Electron., 2016, 32, (3), pp. 17791791.
    9. 9)
      • 9. Farhadi, M., Mohammed, O.: ‘Real-time operation and harmonic analysis of isolated and non-isolated hybrid DC microgrid’, IEEE Trans. Ind. Appl., 2014, 50, (4), pp. 29002909.
    10. 10)
      • 10. Zhu, J., Booth, C.: ‘Future multi-terminal HVDC transmission systems using voltage source converters’. Proc. Int. Univ. Power Engineering Conf., Cardiff, UK, September 2010, pp. 16.
    11. 11)
      • 11. Guerrero, J., Hang, L., Uceda, J.: ‘Control of distributed uninterruptible power supply systems’, IEEE Trans. Ind. Electron., 2008, 55, (8), pp. 28452859.
    12. 12)
      • 12. Chaudhuri, N.R., Chaudhuri, B.: ‘Adaptive droop control for effective power sharing in multi-terminal DC (MTDC) grids’, IEEE Trans. Power Syst., 2012, 28, (1), pp. 2129.
    13. 13)
      • 13. Xu, L., Yao, L.: ‘DC voltage control and power dispatch of a multi-terminal HVDC system for integrating large offshore wind farms’, IET Renew. Power Gener., 2011, 5, (3), pp. 223233.
    14. 14)
      • 14. Stamatiou, G., Bongiorno, M.: ‘Power-dependent droop-based control strategy for multi-terminal HVDC transmission grids’, IET Gener. Transm. Distrib., 2017, 11, (2), pp. 383391.
    15. 15)
      • 15. Abdelwahed, M.A., El-Saadany, E.: ‘Power sharing control strategy of multiterminal VSC-HVDC transmission systems utilizing adaptive voltage droop’, IEEE Trans. Sustain. Energy, 2017, 8, (2), pp. 605615.
    16. 16)
      • 16. Li, Y., He, L., Liu, F., et al: ‘Flexible voltage control strategy considering distributed energy storages for DC distribution network’, IEEE Trans. Smart Grid, 2017, pp, (99), pp. 110.
    17. 17)
      • 17. Feng, W., Tuan, A.L., Tjernberg, L., et al: ‘A new approach for benefit evaluation of multiterminal VSC-HVDC using a proposed mixed AC/DC optimal power flow’, IEEE Trans. Power Deliv., 2014, 29, (1), pp. 432443.
    18. 18)
      • 18. Asgharian, V., Istemihan Genc, V.M.: ‘Multi-objective optimization for voltage regulation in distribution systems with distributed generators’. Proc. IEEE Power Energy Conf., Ottawa, Canada, October 2016, pp. 16.
    19. 19)
      • 19. Zhao, B., Song, Q., Liu, W., et al: ‘Overview of dual-active-bridge isolated bidirectional dc-dc converter for high-frequency-link power-conversion system’, IEEE Trans. Power Electron., 2014, 29, (8), pp. 40914106.
    20. 20)
      • 20. Wang, Y., Song, Q., Sun, Q., et al: ‘Multilevel MVDC link strategy of high-frequency-link DC transformer based on switched capacitor for MVDC power distribution’, IEEE Trans. Ind. Electron., 2017, 64, (4), pp. 28292835.
    21. 21)
      • 21. Saad, H., Peralta, J., Dennetière, S., et al: ‘Dynamic averaged and simplified models for MMC-based HVDC transmission systems’, IEEE Trans. Power Deliv., 2013, 28, (3), pp. 17231730.
    22. 22)
      • 22. Cormen, T.H., Leiserson, C.E., Rivest, R.L.: ‘Introduction to algorithms’ (MIT Press, Cambridge, MA, USA, 2005, 3rd edn.).
http://iet.metastore.ingenta.com/content/journals/10.1049/iet-gtd.2017.1642
Loading

Related content

content/journals/10.1049/iet-gtd.2017.1642
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading
This is a required field
Please enter a valid email address