Control and stability analysis of VSC-HVDC based transmission system connected to offshore wind farm

Document Type : Article


Department of Electrical and Computer Engineering, University of Kashan, Kashan, P.O. Box 87317-53153, Iran


Offshore wind farms (WFs) with significant capacities have been installed recently all over the world. In order to transmit the WF power to the onshore grid, high voltage direct current (HVDC) transmission system is appropriate technology. This paper analytically studies the impact of system parameters, controllers and operating conditions on the dynamic behavior of HVDC transmission systems based on three-level neutral point clamped voltage source converters (VSC). Also, it investigates modeling, control and stability analysis of VSC-HVDC system connected to the offshore wind farms. The VSC-HVDC system comprises offshore and onshore converters and high voltage dc transmission lines. The paper extracts VSC-HVDC system dynamics at the dc-side and argues the interaction between onshore converter control and HVDC transmission line dynamics. Moreover, the paper presents controller design for the dc-link voltage regulation by the onshore converter and examines the impacts of HVDC line length and dc voltage control bandwidth (BW) on the system stability by the modal analysis and time domain simulations.


1. Egea-Alvarez, A., Bianchi, F., Junyent-Ferre, A., et al. "Voltage control of multiterminal VSC-HVDC transmission systems for offshore wind power plants: Design and implementation in a scaled platform", IEEE Transactions on Industrial Electronics, 60(6),pp. 2381-2391 (2013).
2. 2017 European Statistics. EWEA Std. [Online]. Available: Accessed 15 February 2018.
3. The European Offshore Wind Industry-Key Trends and Statistics 2016 (2017). about-wind/statistics/offshore/european-offshorewind-industry-key-trends-and-statistics-2016.Accessed 26 January 2017.
4. Raza, A., Dianguo, X., Xunwen, S., et al. "A novel multiterminal VSC-HVdc transmission topology for offshore wind farms", IEEE Transactions on Industry Applications, 53(2), pp. 1316-1325 (2017).
5. Haileselassie, T.M. "Control, dynamics and operation of multi-terminal VSC-HVDC transmission systems", Doctoral thesis, NTNU University (2012).
6. Prabhu, N.A., Latha, R., Sankaran, K., et al. "Impact of knowledge management on offshore software development: An exploratory study", In Advanced Computing (ICoAC), 2011 Third International Conference on, pp. 121-128, IEEE (2011).
7. Li, Q. and Wang, H. "Two-stage simulation optimization for optimal development of offshore wind farm under wind uncertainty", In Proceedings of the 2016 Winter Simulation Conference, pp. 2891-2902, IEEE Press (2016).
8. Chodura, P., Gibescu, M., Kling, W.L., et al. "Investigation of the impact of embedded VSC-HVDC active and reactive power control on power system stability", In PowerTech, 2015 IEEE Eindhoven, pp. 1-6, IEEE (Jun., 2015).
9. Erlich, I., Shewarega, F., and Winter, W. "A method for incorporating VSC-HVDC into the overall grid voltage-reactive power control task", In Power Systems Computation Conference (PSCC), IEEE, pp. 1-7, (Jun., 2016).
10. Liu, Y. and Chen, Z. "Voltage sensitivity based reactive power control on VSC-HVDC in a wind farm connected hybrid multi-infeed HVDC system", In PowerTech (POWERTECH), 2013 IEEE Grenoble, IEEE, pp. 1-6, (Jun., 2013).
11. Wei, C.Z., Mou, M., An, W., et al. "Optimization of reactive power and voltage for hybrid AC/VSC-HVDC system", 12th IET International Conference on AC and DC Power Transmission (ACDC 2016) (2016).
12. Perveen, R., Kishor, N., and Mohanty, S.R. "Offshore wind farm development: Present status and challenges",Renewable and Sustainable Energy Reviews, 29, pp. 780-792 (2014).
13. Bahrman, M.P. and Johnson, B.K. "The ABCs of HVDC ransmission technologies", IEEE Power and Energy Magazine, 5(2), pp. 32-44 (2007).
14. Muller, H.K., Torbaghan, S.S., Gibescu, M., et al. "The need for a common standard for voltage levels of HVDC VSC technology", Energy Policy, 63, pp. 244-251 (2013).
15. Muyeen, S.M., Takahashi, R., and Tamura, J. "Operation and control of HVDC-connected offshore wind farm", IEEE Transactions on Sustainable Energy, 1(1), pp. 30-37 (2010).
16. Kunjumuhammed, L.P., Pal, B.C., Gupta, R., et al. "Stability analysis of a PMSG-based large offshore wind farm connected to a VSC-HVDC", IEEE Transactions on Energy Conversion, 32(3), pp. 1166-1176 (2017).
17. Li, Y., Xu, Z., stergaard, J., and Hill, D.J. "Coordinated control strategies for offshore wind farm integration via VSC-HVDC for system frequency support", IEEE Transactions on Energy Conversion, 32(3), pp. 843-856 (2017).
18. Mitra, P., Zhang, L., and Harnefors, L. "Offshore wind integration to a weak grid by VSC-HVDC links using power-synchronization control: A case study", IEEE Transactions on Power Delivery, 29(1), pp. 453-461 (2014).
19. Moawwad, A., El Moursi, M.S., and Xiao, W. "Advanced fault ride-through management scheme for VSC-HVDC connecting offshore wind farms", IEEE Transactions on Power Systems, 31(6), pp. 4923-4934 (2016).
20. Daoud, M.I., Massoud, A.M., Abdel-Khalik, A.S., et al "A  ywheel energy storage system for fault ride through support of grid-connected VSC HVDC-based offshore wind farms", IEEE Transactions on Power Systems, 31(3), pp. 1671-1680 (2016).
21. De Boeck, S., Tielens, P., Leterme, W., et al. "Configurations and earthing of HVDC grids", In Power and Energy Society General Meeting (PES), pp. 1-5 (Jul., 2013).
22. Pinto, R.T. and La Seta, P., Dynamics and Control of VSC-Based HVDC Systems: A Practical Approach to Modeling and Simulation, LAP Lambert Academic Publishing (2012).
23. Vrana, T.K. and Energi, S. "Review of HVDC component ratings: XLPE cables and VSC converters", In Energy Conference (ENERGYCON), 2016 IEEE International, pp. 1-6 (Apr., 2016).
24. Xu, L. and Andersen, B.R. "Grid connection of large offshore wind farms using HVDC", Wind Energy, 9(4), pp. 371-382 (2006).
25. Xiang, D., Ran, L., Bumby, J.R., et al. "Coordinated control of an HVDC link and doubly fed induction generators in a large offshore wind farm", IEEE Transactions on Power Delivery, 21(1), pp. 463-471 (2006).
26. Olguin, R.E.T. "Grid integration of offshore wind farms using hybrid hvdc transmission: Control and operational characteristics", Doctoral thesis, NTNU University (2013).
27. Chinchilla, M., Arnaltes, S., and Burgos, J.C. "Control of permanent-magnet generators applied to variablespeed wind-energy systems connected to the grid", IEEE Transactions on Energy Conversion, 21(1), pp. 130-135 (2006).