Subjects: Dynamic and Electric Engineering >> Electrical Engineering submitted time 2019-03-05 Cooperative journals: 《电气工程学报》
Abstract：提出了一种应用于高压场合的三相线电压级联型高频链矩阵整流器（LVCHLFMR）拓扑，该拓扑由基于 HLFMR 单元模块的三相线电压级联型变换器、高频变 压器、单相整流器构成，可直接与三相系统相连，具有开关数量少、省略直流储能环 节及结构紧凑等优点。分析了 HLFMR 的调制策略，在此基础上提出了针对三相桥直 接级联结构特点的 HFLMR 改进换流策略，解决了采用常规换流时出现的负载开路问 题，以及变换器工作状态切换至零矢量时的瞬时相间短路问题，仿真结果表明所提拓 扑的正确性及改进换流策略的有效性。
Subjects: Mechanical Engineering >> Other Disciplines of Mechanical Engineering submitted time 2018-06-15 Cooperative journals: 《电气工程学报》
Abstract： An three-phase line-voltage-cascaded high-frequency link matrix rectifier (LVC-HLFMR) topology applied in high-voltage situations is proposed in the paper. The topology consists of three-phase line voltage cascaded converter which based on HLFMR unit module, high frequency link transformer, single-phase rectifier，and it can be directly connected to a three-phase system. It has the advantages of few switch quantity, omit the dc energy storage link, compact structure, etc. The HLFMR modulation strategy is analyzed, on this basis an improved commutation strategy is proposed according to the three-phase bridge direct cascade structure characteristics. The problem of open load when using the conventional commutation strategy and the instantaneous short circuit problem when converter work status switch to zero vector are solved. The simulation and experimental results verify the validity of the proposed topology and the effectiveness of the improvement commutation strategy.
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