Journal
IEEE TRANSACTIONS ON POWER DELIVERY
Volume 31, Issue 1, Pages 20-27Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPWRD.2015.2401056
Keywords
HVDC transmission; power system faults; power system simulation; power system transients; PSCAD
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Funding
- ABB Switzerland Ltd.
- Siemens AG
- Alstom Grid
- Swiss Federal Office of Energy (BfE)
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HVDC short-circuit calculation standards will be required to simplify the dimensioning and selection of circuit breakers (CBs) in future HVDC networks. This paper proposes new analytical formulas for the calculation of the ac-side contribution through the blocked half-bridge-based converters during pole-to-ground faults in multiterminal HVDC cable networks. Analytic approximations are derived for the steady-state short-circuit currents and the peak of the transient response for point-to-point HVDC links and extended to multiterminal HVDC cable networks with arbitrary grid topology. The results of the proposed expressions are compared with simulations in PSCAD and provide accurate calculations for the transient peak and steady-state values of the ac-side fault current contribution to the prospective CB current.
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