Design of Solid State Transformer
International Journal of Innovations in Engineering and Technology
The present widely used conventional (or traditional) Line (or Low) Frequency (50 / 60 Hz) Transformers (LFT) have some merits like relatively economical, highly reliable and quite efficient but they suffer with certain drawbacks like sensitive to harmonics, voltage drop under load, no protection from system disruptions and overloads, poor performance under dc-offset load unbalances and no power factor improvement. As conventional transformers with copper wound wires on an iron core will not
... pond to a control signal as power generation becomes distributed and intermittent, we need electronic based regulated power supply with software based remote intelligence. Also to easily connect the new energy sources to the grid and to improve the power quality by harmonic filtering, voltage sag correction and highly dynamic control of the power flow, a new type of transformers based on Power Electronics, known as Solid State Transformer(SST) or Power Electronic Transformer (PET), has been introduced, which realizes voltage transformation, galvanic isolation, and power quality improvements such as instantaneous voltage regulation, voltage sag compensation and power factor correction. It is a collection of high-powered semiconductor components, High Frequency (HF) Power Transformers and control circuitry which is used to provide a high level of flexible control to power distribution networks. The SST provides a fundamentally different and more complete approach in transformer design by using power electronics on the primary and secondary sides of the transformer. In this work, an attempt has been made to review the available literature on design of transformer at different frequencies, incorporation of power electronic devices (PED) like rectifiers and inverters and integrating them to design an economically viable and energy efficient SST.