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Solid state transformers (SSTs) have found widespread power applications in traction locomotives, distribution systems, smart grids, etc., where they are going to replace conventional transformers and associated power enhancement equipments to provide better power quality features and functionalities. An eminent structure of SST comprises of three power conversion stages: input (AC-DC), isolation...
Cascaded H-bridge (CHB) multilevel converters have found extensive high power applications due to their modular structure, simpler layout, and reduced number of components. The reported work proposes a vector control method for a three phase CHB active rectifier (CHBAR) to offer the desired voltages across its dc-link capacitors and the prerequisite power factor at the grid terminals under variable...
In recent years, Power Electronic Transformers (PETs) are being used in micro-grids, distribution systems, renewable energy systems, traction applications etc., due to their power quality enhancement capability and reduced weight as well as size. The design and operation principles of a three phase active rectifier based PET are analysed in the paper. The structure of PET consists of three parts:...
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