Your browser does not support JavaScript!
http://iet.metastore.ingenta.com
1887

access icon openaccess Hybrid ultra-HVDC system with LCC and cascaded hybrid MMC

This is an open access article published by the IET under the Creative Commons Attribution-NonCommercial-NoDerivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/)
Received 23/08/2018, Accepted 19/09/2018, Published 23/10/2018

Nowadays, the hybrid high-voltage direct current (HVDC) system consisting of line commutated converter (LCC) and modular multilevel converter (MMC) has become the most competitive candidate in multi-infeed power systems. Owing to the limitation of insulated-gate bipolar transistor's withstand voltage, the DC voltage rating of MMC is not compatible with the LCC valve. To increase the DC voltage level, the number of sub-modules of each arm should be increased drastically, leading to many technical problems in communication design, optical fibre instalment, cooler system design and so on. To overcome the above problems, a hybrid HVDC system consisting of LCC and cascaded hybrid MMC valves is proposed to realise ultra-HVDC transmission. It can switch two operating modes (single valve/double valve) according to the conditions so that the system can maintain a certain power transmission when one of the valves quit operation during faults or maintenances. Meanwhile, by implementing the hybrid MMC, the system can ride through DC faults. The design of the topology and controllers, the DC fault ride-through strategy and the online switching strategy for MMCs will be presented in this study. Finally, the performance during DC faults and online switching is verified by extensive simulations.

Inspec keywords: HVDC power transmission; power transmission faults; valves; hybrid power systems; power transmission control; voltage-source convertors; HVDC power convertors; switching convertors; short-circuit currents; cascade networks

Other keywords: DC voltage rating; competitive candidate; ultra-HVDC transmission; hybrid MMC valves; multiinfeed power systems; insulated-gate bipolar transistor; DC fault ride-through strategy; hybrid ultra-HVDC system; power transmission; online switching strategy; line commutated converter; modular multilevel converter; LCC valve; high-voltage direct current system

Subjects: Power electronics, supply and supervisory circuits; d.c. transmission; AC-DC power convertors (rectifiers); Control of electric power systems; Power system control; DC-AC power convertors (invertors); Actuating and final control devices

References

    1. 1)
      • 4. Hahn, C., Geuß, A., Luther, M.: ‘Modeling and control design of hybrid-LCC and VSC-based-HVDC systems’. 2016 IEEE/PES Transmission and Distribution Conf. and Exposition (T&D), Dallas, TX, 2016, pp. 1–6.
    2. 2)
      • 9. Tang, G., Xu, Z., Zhou, Y.: ‘Impacts of three MMC-HVDC configurations on ac system stability under DC line faults’, IEEE Trans. Power Syst., 2014, PP, pp. 1–11.
    3. 3)
      • 7. Lee, Y., Cui, S., Kim, S., et al: ‘Control of hybrid HVDC transmission system with LCC and FB-MMC’. 2014 IEEE Energy Conversion Congress and Exposition (ECCE), Pittsburgh, PA, 2014, pp. 475–482.
    4. 4)
      • 2. Zeng, R., Xu, L., Yao, L., et al: ‘Hybrid HVDC for integrating wind farms with special consideration on commutation failure’, IEEE Trans. Power Deliv., 2016, 31, (2), pp. 789–797.
    5. 5)
      • 6. Xu, J., Zhao, C.Y., Li, T., et al: ‘The hybrid HVDC transmission using line commutated converter and full bridge modular multilevel converter’. 2013 IET Renewable Power Generation Conf. (IET RPG), Beijing, China, 2013, pp. 1–4.
    6. 6)
      • 8. Tang, G., Xu, Z.: ‘A LCC and MMC hybrid HVDC topology with DC line fault clearance capability’, Int. J. Electr. Power Energy Syst., 2014, 62, pp. 419–428, 11.
    7. 7)
      • 14. Xiang, W., Lin, W., Xu, L., et al: ‘Enhanced independent pole control of hybrid MMC-HVDC system’, IEEE Trans. Power Deliv., 2018, 33, (2), pp. 861–872.
    8. 8)
      • 5. Xu, Z., Huang, H., Tang, G., et al: ‘Two new techniques to solve the problems with multi-infeed HVDC systems’. 2014 Int. Conf. on Power System Technology, Chengdu, 2014, pp. 2075–2082.
    9. 9)
      • 11. Wang, C., Zhu, L., Chen, B., et al: ‘Analysis on voltage stability of hybrid system with UHVDC hierarchical connection to AC grid’. 2016 IEEE 8th Int. Power Electronics and Motion Control Conf. (IPEMC-ECCE Asia), Hefei, 2016, pp. 690–695.
    10. 10)
      • 1. Cheng, L., Feng, H., He, J.: ‘HVDC development and its reliability in China’. 2013 IEEE Power & Energy Society General Meeting, Vancouver, BC, 2013, pp. 1–5.
    11. 11)
      • 10. Jung, J.J, Cui, S., Lee, J.H., et al: ‘A new topology of multilevel VSC converter for a hybrid HVDC transmission system’, IEEE Trans. Power Electron., 2017, 32, (6), pp. 4199–4209.
    12. 12)
      • 13. Lin, W.X., Jovcic, D., Nguefeu, S., et al: ‘Full-bridge MMC converter optimal design to HVDC operational requirements’, IEEE Trans. Power Deliv., 2016, 31, (3), pp. 1342–1350.
    13. 13)
      • 12. Zeng, R., Xu, L., Yao, L., et al: ‘Precharging and DC fault ride-through of hybrid MMC-based HVDC systems’, IEEE Trans. Power Deliv., 2015, 30, (3), pp. 1298–1306.
    14. 14)
      • 3. Shilpa, G., Manohar, P.: ‘Hybrid HVDC system for multi-infeed applications’. 2013Int. Conf. on Emerging Trends in Communication, Control, Signal Processing and Computing Applications (C2SPCA), Bangalore, 2013, pp. 1–5.
http://iet.metastore.ingenta.com/content/journals/10.1049/joe.2018.8559
Loading

Related content

content/journals/10.1049/joe.2018.8559
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading
Print this page
This is a required field
Please enter a valid email address