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 …

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) …

The increasing demand for development and utilization of renewable energy sources has
led to a growing interest in DC transmission and distribution systems. However, lack of a …

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 lack of effective DC fault protection technology remains a major barrier for the DC
paradigm shift. In addressing the key challenges, Direct Current Fault Protection: Basic …

A new series-type hybrid circuit breaker (S-HCB) concept for dc fault protection is reported
that is fundamentally different from other prior-art hybrid circuit breakers (HCB) or solid-state …

High voltage direct current (HVDC) systems are now well integrated into AC systems in
many jurisdictions. The integration of renewable energy sources (RESs) is a major focus …

In recent years, dc distribution grids have become increasingly popular because of the
interest in the diffusion of distributed renewable energy. In this scenario, dc distribution grids …

Since most of renewable energy resources are dc type, dc microgrids find more attention in
deregulated power systems for improvement of reliability and efficiency of the system. In dc …

Voltage Source Converter-High Voltage Direct Current (VSC-HVDC) is the most efficient and
reliable method for electrical power transmission over long distances. The greatest …