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


M. Krishnakumari, P. Bharath Kumar, Dr. P. Sujatha
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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.

M. Krishnakumari, P. Bharath Kumar, Dr. P. Sujatha

DC-side faults, double thyristor switch, fault current suppression, protection of HVDC converters.

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Publication Details

Published in : Volume 3 | Issue 2 | March-April - 2017
Date of Publication Print ISSN Online ISSN
2017-04-30 2395-1990 2394-4099
Page(s) Manuscript Number   Publisher
179-190 IJSRSET173262   Technoscience Academy

Cite This Article

M. Krishnakumari, P. Bharath Kumar, Dr. P. Sujatha, "Protection Scheme for HVDC Converters to Limit Fault Current against Dc-Side Faults", International Journal of Scientific Research in Science, Engineering and Technology(IJSRSET), Print ISSN : 2395-1990, Online ISSN : 2394-4099, Volume 3, Issue 2, pp.179-190 , March-April-2017.
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