Implementation of the Three-Level DC-DC Converter Applied in Medium-Voltage Solid-State Transformer

Abstract

As the progress of wide-bandgap (WBG) semiconductor devices and the rise of distributed energy resources (DER) medium-voltage solid-state transformer (SST) becomes more and more popular in recent years Medium-voltage SST features high-performance and fantastic functionality The SST proposed in this thesis is applied in 11 4 kVAC distribution system and the DC stage of the SST is composed of 13 modules Operating principle steady-state analysis and components design of the converter as well as the parameter design insulation consideration and loss optimization of the transformer are described in detail in this thesis Meanwhile the simulation software SIMPLIS and COMSOL Multiphysics? are used to ensure the validity Finally a prototype converter with input voltage 1 52 kVDC output voltage 380 VDC and output power 10 kW is designed and realized to verify the feasibility of the module applied in SST

Date of Award	2018 Aug 1
Original language	English
Supervisor	Jiann-Fuh Chen (Supervisor)