High-Speed Differential Protection for Smart DC Distribution Systems

Solid-state Over-current Protection for Industrial DC Distribution Systems

We describe a concept for circuit protection and fault current limitation in DC power systems based on the use of solid-state power switches. The approach could be useful in the increasingly widespread application of DC power distribution networks. During normal operation the power switch is always “on”. During faults, the gate of the solid-state switch is pulse modulated to prevent the circuit...

Fault inductance based protection for DC distribution systems

The fault protection is a critical element to ensure the reliable and secure operation of DC distribution systems. Most DC distribution systems are tightly coupled systems with low line impedances which may result in fast current increase during a fault. Thus, it is challenging to develop a fast and reliable DC fault protection method. This paper proposes and develops a novel fault inductance b...

Guest Editorial: Special Section on Smart DC Distribution Systems

High Speed 2kW DC/DC Converter

This report investigates the possibilities of constructing a DC/DC converter to power an industrial ABB robot so that it can operate without any access to a 3-phase socket. The work is performed at Mälardalens University in Västerås. The paper is initiated with a theoretical part explaining some fundamentals of power semiconductors in order to provide a deeper understanding of how they behave i...

Multi-Terminal DC System line Protection Requirement and High Speed Protection Solutions

For long distance and high power transmission, high-voltage direct current (HVDC) transmission is a preferred solution due to its technical and economic advantages. A multi-terminal HVDC (MTDC) transmission system either based on voltage source converters (VSC) or line-commutated converters (LCC) has also been introduced recently. With the development of fast and high breaking capability HVDC c...