Power Electronic Transformer Based on Industrial Drive Applictions

Abstract

Power electronic transformers (PET) based on ac voltage regulator with pulse-width regulation, in     various areas of their application are discussed. A research of a powerelectronic transformer based on an ac voltage regulatoroperating at high frequency with ability to support unity powerfactor by means of mathematical modeling is conducted. Themajor power characteristics are obtained using the outputfactors of electric energy quality of the device. A universalsingle-phase experimental mock-up is presented Problems linked with stabilization of AC voltage can be solved with the AC voltage regulators. It is known that regulators of AC voltage can be also used for stabilization of an ac voltage, regulation of reactive power, active filters. Besides similar converters do not contain electrolytic capacitors, unlike known “back-to-back” of converters that respectively prevents from emergency operation which can occur in their DC-link. In addition, power electronic transformers based on AC voltage regulators can be classified by power that respectively and allow to define area of their application, namely distributive systems, mobile/autonomous objects (system of power supply of responsible consumers), “smart” networks. The main advantage this PET on the basis of ac voltage regulator, is ability to support single entrance power factor.

Index Terms - Power electronic transformer, AC voltage
regulator, Pulse width modulation