An evaluation of solid-state transformer performance with an option of usage with non-conventional energy sources

The solid-state transformers in the renewable energy domain allow DC power to be transmitted without using power converters,which reduces voltage fluctuations The new concept of using renewable energy sources to give power to the grid through solid-state transformers which reduces t h e size of the transformer compared the to the conventional transformer for the distribution Grid. The objective is to make an SST model to help evaluate the impact of replacing conventional transformers with SST on grid performance. MATLAB Test model of SST was simulated for various carrier frequencies and a constant output is received. The simulation was performed assuming a voltage dependent load and taking into account the fact that the current through one of the HV/MV sub-transformers are bi-directional. Simulation output shows accrued advantages on voltage can be expected at both medium and low voltage levels, and shows a new approach for SST design from non-conventional energy sources. A simulation of a single stage SST topology are simulated in MATLAB and the results are discussed in the paper, which are useful for Industrial experts and the R&D domain for its implementation in the future.