Application of back-to-back converters in closed-loop and meshed MV distribution grid

This paper deals with the proposal of a connection to form closed-loop or meshes inside one or more medium voltage primary distribution networks. The main idea consists in realizing this connection through a suitable tie converter constituted by two AC/DC converters in back-to-back configuration. In this way, it is possible to control the power flows between two lines or two different grids keeping the radial structure of the system. This can be useful in presence of distributed generation to share the power among many loads connected to different distribution lines. In the paper the proposed system is analyzed, simulated and discussed both in steady state condition and during faults coming from the MV primary distribution network