Implementation of Three-Level DC/DC Bidirectional CLLC Resonant Converter Applied in Medium-Voltage Solid-State Transformer

Yu Chai Hsiao, Jiann Fuh Chen, Guo Kai Wu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The medium-voltage solid-state transformers (SST) have played an important role in medium-voltage systems such as smart micro grids,renewable energy systems,traction systems and so on. Compared with traditional 50/60 Hz transformers,high operating frequency can greatly reduce the volume and weight of magnetic components. In this thesis,the three-level half bridge topology lets the voltages across the semiconductor elements are half of input voltage,therefore,the converter can withstand higher input voltage. The CLLC resonant structure realizes soft switching that reduce the switching loss to higher the converter's efficiency and bidirectional power transfer. In addition,the insulation system is designed to protect the converter and driving circuit from damaged when the circuit breaks down. A prototype circuit is made in this thesis. The high voltage side is 5.2 kV,the low voltage side is 400 V and the rated power is 40 kW. The cast resin transformer is used as isolation transformer in the circuit. Finally,the experimental high-voltage side 2.6 kV and the low-voltage side 200 V are used to verify and support the theoretical formula and the SIMPLIS simulation results.

Original languageEnglish
Title of host publication2021 IEEE International Future Energy Electronics Conference, IFEEC 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781665434485
DOIs
Publication statusPublished - 2021
Event2021 IEEE International Future Energy Electronics Conference, IFEEC 2021 - Taipei, Taiwan
Duration: 2021 Nov 162021 Nov 19

Publication series

Name2021 IEEE International Future Energy Electronics Conference, IFEEC 2021

Conference

Conference2021 IEEE International Future Energy Electronics Conference, IFEEC 2021
Country/TerritoryTaiwan
CityTaipei
Period21-11-1621-11-19

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Control and Optimization

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