南方电网技术2017，Vol.11Issue(4)：7-13,22,8.DOI:10.13648/j.cnki.issn1674-0629.2017.04.002
CLLC型模块化输入串联输出并联直流变压器
CLLC Type Modular Input-Series Output-Parallel DC Transformer
摘要
Abstract
The technical scheme of a CLLC type modular input-series output-parallel DC transformer is presented, which can achieve voltage conversion and power transmission between high and low voltage of DC grid.CLLC series resonance transformer is adopted as submodule of DC transformer, which works at open loop mode, constant frequency mode and full resonance mode with high efficiency and constant voltage gain, and the input voltage and output current of each submodule are naturally equal.In order to prevent the large impact current, a soft start control strategy is proposed, in which the duty ratio D slowly increases from Dmin to 0.5 by means of pulse modulation control.A 500 kW ±7.5 kV/800 V DC transformer prototype is built, the correctness and feasibility of the proposed topology and design method are verified by the experimental results.关键词
直流变压器/输入串联/输出并联/模块Key words
DC transformer/input-series/output-parallel/module分类
信息技术与安全科学引用本文复制引用
石巍,方太勋,谢晔源,杨浩,李海英..CLLC型模块化输入串联输出并联直流变压器[J].南方电网技术,2017,11(4):7-13,22,8.基金项目
国家863高技术基金项目(2015AA050101).Foundation item: Supported by the National High Technology Research and Development of China 863 Program(2015AA050101). （2015AA050101）
