Voltage and current balancing in Low and Medium Voltage grid by means of Smart Transformer

The Smart Transformer: Impact on the Electric Grid and Technology Challenges

“…The reactive power represents a degree of freedom for the ST: it can be controlled separately from phase to phase [23] and it is decoupled from the LV reactive power request due to the presence of the DC links. This feature enables a basic service, that is the possibility to work with unity power factor, and advanced services, like harmonic compensation and voltage support in MV side.…”

Investigation on Common-Mode Voltage Suppression in Smart Transformer-Fed Distributed Hybrid Grids

“…The Smart Transformer (ST), as shown in Fig. 1, where the medium voltage (MV) DC bus can be used for fast charging station, large wind and PV, the low voltage (LV) DC link integrates the storage system, and both LV AC and DC grid can integrate distributed generators and charging station, is a candidate to enable the hybrid grids while offering ancillary services to AC grids [1]- [6].…”

Power-Hardware-In-Loop harmonic analysis of a Smart Transformer-fed distribution grid

“…The ST, a power electronicsbased transformer [1], [2], aims not only at substituting the traditional Low Voltage (LV)/Medium Voltage (MV) transformer, but also at providing new services to the grid. The ST allows the voltage and current control in MV [3] and LV grids [4], harmonic compensation [5], load identification and control by means of frequency and voltage variations in LV grids [6][7] [8]. In order to show the ST features in realistic conditions, the implementation in a test distribution grid is needed.…”