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Protection Scheme for HVDC Converters to Limit Fault Current against Dc-Side Faults

Author

Listed:
  • M. Krishnakumari
  • P. Bharath Kumar
  • P. Sujatha

Abstract

This paper presents a protection scheme for HVDC converters against DC-side faults with current suppression capability by combining and connecting double thyristor switch scheme across ac output terminals of the HVDC converter.The severity of dc-side faults can be limited by connecting double thyristor switches across the semiconductor devices.By turning them on, the ac current contribution into the dc side is eliminated and the dc-link current will freely decay to zero.This protection scheme provides advantages, such as lower dv/dt stresses and lower voltage rating of thyristor switches in addition to providing full seperation between the converter semiconductor devices and ac grid during dc-side faults.A simulation case study has been carried out to demonstrate the effectiveness of the proposed scheme.

Suggested Citation

  • M. Krishnakumari & P. Bharath Kumar & P. Sujatha, 2017. "Protection Scheme for HVDC Converters to Limit Fault Current against Dc-Side Faults," International Journal of Scientific Research in Science, Engineering and Technology, International Journal of Scientific Research in Science, Engineering and Technology, vol. 3(2), pages 179-190, April.
    • Handle: RePEc:ijs:ijsrse:v3:y2017:i2:id:hijsrset173262
    Note: Article URL: https://ijsrset.com/IJSRSET173262
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