Standalone operation of a single phase medium voltage solid state transformer in distribution grid

In this paper, the operation of a single phase medium voltage Solid State Transformer (SST) is presented. With the new development of high voltage wide band gap semiconductor devices, particularly the SiC MOSFETs and JBS diodes, SSTs that are suitable for distribution grid can be developed with simpler topology and reduced device number. Features such as renewable energy integration, grid voltage restoration, load harmonic mitigation, regenerative power flow can all be implemented at the distribution node deploying SSTs. This paper explains each of these operations, accompanied by test results carried out with a laboratory prototype.