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DC fault analysis in voltage source converter based HVDC link


Affiliations
1 Koneru Lakshmaiah University, Vaddeswaram, Guntur -522502, Andhra Pradesh, India
2 Central Power Research Institute, Bangalore - 560 080, Karnataka, India
     

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The use of voltage source converter (VSC) based HVDC transmission for the interconnection of various power networks is increasing day by day. However, VSCs susceptibility to DC faults, particularly the potential damage caused to the converter switches due to overcurrent, is an issue. The fault clearing must be done very rapidly, to limit the effect of the fault on neighboring networks. This paper analyses the two terminal behavior of a VSC- based HVDC system under DC fault condition. In this work, HVDC link is connected between the systems of two different frequencies. Simulations are carried out in RSCAD/RTDSTM software and the performance of the system is analyzed for DC faults and the results are presented.

Keywords

Voltage source converter, VSC-HVDC, DC fault, DC voltage controller, AC voltage controller, (Neutral Point diode Clamped) NPC converter.
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  • DC fault analysis in voltage source converter based HVDC link

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Authors

S. K. B. Karishma
Koneru Lakshmaiah University, Vaddeswaram, Guntur -522502, Andhra Pradesh, India
J. Sreedevi
Central Power Research Institute, Bangalore - 560 080, Karnataka, India
P. Noor Cheshma
Central Power Research Institute, Bangalore - 560 080, Karnataka, India
K. Sarada
Koneru Lakshmaiah University, Vaddeswaram, Guntur -522502, Andhra Pradesh, India

Abstract


The use of voltage source converter (VSC) based HVDC transmission for the interconnection of various power networks is increasing day by day. However, VSCs susceptibility to DC faults, particularly the potential damage caused to the converter switches due to overcurrent, is an issue. The fault clearing must be done very rapidly, to limit the effect of the fault on neighboring networks. This paper analyses the two terminal behavior of a VSC- based HVDC system under DC fault condition. In this work, HVDC link is connected between the systems of two different frequencies. Simulations are carried out in RSCAD/RTDSTM software and the performance of the system is analyzed for DC faults and the results are presented.

Keywords


Voltage source converter, VSC-HVDC, DC fault, DC voltage controller, AC voltage controller, (Neutral Point diode Clamped) NPC converter.



DOI: https://doi.org/10.33686/prj.v11i2.189422