Interruption of DC is more challenging than that of AC because of the absence of DC zero-
crossings. This thesis proposes an alternative counter-voltage (ACV) DC hybrid circuit …

The DC circuit breaker (DCCB) is a critical device that ensures the safe and reliable
operation of the DC transmission system. As the level of DC voltage and transmission power …

Hybrid high voltage direct current circuit breakers (DCCBs) are capable of interrupting fault
current within a few milliseconds, but this technology has high capital cost, especially in a …

We developed a current commutated hybrid direct current circuit breaker (DCCB) for high-
voltage direct current transmission systems. The transmission losses of the developed …

Direct current (dc) power system protection presents a major challenge due to its unique
characteristics, namely the absence of natural zero current crossing points. Thanks to their …

A reliable and cost-effective mechanical direct current circuit breaker (DCCB) is a promising
solution for DC interruption. However, the typical mechanical DCCB has difficulty in …

The use of a DC circuit breaker to open and isolate DC faults in a flexible DC grid is one of
the simplest and most reliable methods for handling DC faults. However, current limiting …

Multiport hybrid dc circuit breakers (M-HCBs) have been recognized as suitable devices for
protecting dc grids. Most M-HCB topologies include load current switch (LCS), leads to …

Two key challenges in meshed multi-terminal dc (MTdc) grids are line power flow
management and fault current interruption, which can be solved by current flow controllers …

Hybrid dc circuit breakers (HCBs) are recognized as suitable devices for protecting high-
voltage direct-current (HVDC) systems, along with other dc circuit breakers (DCCB) …