Dahidah M

Ethni S

Kadandani N

Yu J

This paper first outline the motivation behind solid state transformer (SST) against conventional line frequency transformer (LFT) as well as its functional futures and benefits and secondly explore all the possible configurations of SST in terms of circuit configurations, advantages, disadvantages and their potential areas of applications. Four circuit configurations considered in this paper include; single stage SST, two stage SST with low voltage DC link (LVDC), two stage SST with high voltage DC link (HVDC) and three stage SST. Our findings reveals that apart from providing voltage regulation, SST can provide other additional ancillary services to the grid to enable it cope with transients. These services (such as power quality improvement, fault isolation, instantaneous voltage regulation, active and reactive power compensation) are not offered by LFT, as such SST is considered as the potential transformer in smart grid applications, renewable energy integration, modern traction systems and other applications where space and volume are critical

Solid State Transformer: An Overview of Circuit Configurations and Applications

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