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Solid-State Transformers (SSTs) are a promising technology since they combine a high efficiency with the integration of new functionalities and services in the grid. A SST establishes the interface between a MV AC three-phase grid and a LV AC or DC grid. For this reason a SST is subject to electrical stresses due to faults occurring in the grid. The MV and LV grids are in return exposed to failures...
Recent advancements in power electronics are making it feasible to build high power DC distribution systems. Their adoption is expected to bring new solutions in terms of Power Quality and integration of energy storage systems and electronic drives on board. The increasing interest in high-power onboard applications, such as in ships or railway transportation, led to the rise in voltage levels, which...
The aim of this paper is to investigate how Transient Recovery Voltage (TRV) characteristics are varied due to network and Vacuum Circuit Breaker (VCB) parameters. The role of RC damping branch to mitigate TRV is observed for Short Circuit (SC) and inductive load interruption. For this, a numerical method is taken to solve network and VCB equations simultaneously just after Current Zero (CZ). To evaluate...
An improved mathematical model for transient simulations of commutator machines is presented in this paper. This model can simulate and predict the line current harmonics during healthy and faulty operation conditions. A lumped parameter model that considers every single coil in the stator and rotor as a separate electrical and magnetic circuit is proposed. Self and mutual inductances of the coils...
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