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Voltage source converters (VSC) are increasingly being used in high voltage direct current (HVDC) systems and with higher power ratings of these converters, the interest for usage with long transmission system is also increasing. With long overhead transmission dc links, many faults would be transient or temporary in nature. Such faults are mainly caused by lightning. The objective of this paper lies...
HVDC breakers, capable of interrupting DC fault currents within only a few milliseconds are currently under development. Application of such breakers allows for selective DC fault clearing which previously has limited the practical application of large-scale DC grids. However, for reliable operation of such systems, the underlying protection algorithms must be able to distinguish between different...
This paper demonstrates the performance of a three-terminal DC grid test system modelled in a real-time digital simulator (RTDS) platform at ABB's DC Grid Simulation Center. In this hardware-in-the-loop simulation arrangement, all the converter stations, AC network equivalents, transformers, cables and the DC switchyards including DC breakers are modelled inside RTDS following a dual time-step strategy...
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