학술논문
A Single-Stage Three-Phase Isolated AC-DC Converter for Medium Voltage Solid State Transformer Applications
Document Type
Conference
Source
2023 IEEE Applied Power Electronics Conference and Exposition (APEC) Applied Power Electronics Conference and Exposition (APEC), 2023 IEEE. :1503-1509 Mar, 2023
Subject
Language
ISSN
2470-6647
Abstract
A three-phase, single-stage, isolated AC-DC converter that can achieve low total harmonic distortion (THD), aimed at Medium Voltage (MV) Solid State Transformer (SST) applications is introduced in this paper. Combining three-phase power-factor correction (PFC), and discontinuous-current mode (DCM) boost rectifiers with a highly efficient resonant converter, the proposed single-stage SST features low cost, simple control, and high efficiency. The whole converter deploys only one MV power transformer to reduce the cost and efforts of the isolation design. The evaluation is performed on a 12 kW prototype operating at 3.4 kV DC-link voltage. The measured input current THD is less than 4% without any active control.