Analysis and Performance Evaluation of Maximum Step up Ratio DC to DC Resonant Converter

摘要

The HVDC and wind turbine interfaces were attain the researchers interest by its megawatt ratings over the dc-dc convertors ration with high setup. In this stusy, we have produced a regular multi-stage dc-dc resonant converter enhanced with topology of ideal boost converter. In this mechanism the traditionally used single switches were replaced instead of that number of clamped capacitor sub-modules are implemented. In which the converter is implemented with some resonance betweenthe arm inductor and sub-module clamped capacitors in a resonant mode. To provide a constant number the switching arrangement ofa phase-shifting operation is provided and supported by N of sub-capacitor modules at very high voltage. On this operation mode the count of sub-capacitor modules and the inductor charging ratio play a vital role which supports the step-up ratio. This converter has the capacity of bidirectional power flow and even without transformer it exhibits scalability. A wind turbine interface as an application example is shown with the conversion ratio 10:1 which is shown on simulation results. The proposed concept is experimentally verified with a laboratory-scaleprototype.