Study on 18-step Back-to-Back Voltage Source Converter for HVDC Application

직류송전 적용을 위한 18-스텝 Back-to-Back 전압원 컨버터에 관한 연구

  • Published : 2009.04.01


This paper proposes a 18-step back-to-back voltage source converter using four sets of 3-Level converter module with auxiliary circuit to increase the number of steps. The proposed back-to-back voltage source converter has an independent control capability of active power and reactive power at the interconnected ac system. The operational feasibility of proposed system was verified through computer simulations with PSCAD/EMTDC software. The feasibility of hardware implementation was verified through experimental results with a scaled hardware model. The proposed back-to-back converter can be widely applied for interconnecting the renewable energy source to the power grid.


  1. L. Y onghe, J. Arrillaga, N. Watson, 'EMTDC Assessment of a New Type of VSC for Back to back HVDC Interconnections', International Conference on Power system Transients-IPST 2003 in New Orleans, USA, pp. 1-5
  2. K. Oguchi, Y. Maki, Y. Sunaga 'Three-Phase Multilevel Voltage Source Converters with Low Switching Frequencies and Less-Distorted Input Voltages', Industry Applications Society Annual Meeting, Conference Record of the 1993 IEEE, vol.2, pp. 870-878 2-8 Oct. 1993
  3. S. Masukawa and S. Iida, 'A Method for Reducing Harminics in Output Voltages of a Double-Connected Inverter', IEEE Trans. on Power Electronics, Vol. 9, No.5, pp. 543-550, September 1994
  4. D. Ramey, 'Design, Installation, and Operation of American Electric Power (AEP) 320MVA Unified Power Flow Controller (UPFC)', EPRI (Electric Power Research Institute), Palo Altos, CA, Tech. Rep. TR-113839, Nov. 1999
  5. C. Schauder, et. aI., 'Development of a ±100Mvar static condenser for voltage control of transmission systems', IEEE Trans. on Power Delivery, Vol. 10, No.3, pp. 1486-1493, July, 1995
  6. L. Yonghe, J. Arrillaga, N. Watson, 'Multi-level voltage sourced conversion by voltage reinjection at six times the fundamental frequency', IEE Proc. on Electrical Power Application, Vol. 149, No.3, pp. 201-207, May 2002
  7. B. Han, S. Baek, B. Bae, J. Choi, 'Back-to-Back HVDC system using a 36-step voltage source converter', lEE Proc. Gener. Transm. Distrib. Vol. 153, No.6, pp. 677-683, November 2006