电工技术学报2018，Vol.33Issue(9)：2044-2054,11.DOI:10.19595/j.cnki.1000-6753.tces.170155
1500 V三电平正激变换器
1 500 V Three-Level Forward Converter
摘要
Abstract
To meet the requirements on medium and high voltage DC collection of photovoltaic grid-connected system, this paper proposes a 1 500 V three-level forward converter. By filtering the outputs in series-parallel centrally, the modularized architecture of DC collection is established with no internal filter in each DC/DC converter. With this approach, the voltage stress of the switch is lowered, and the impact of unbalanced components can be solved, and the electric energy transmission and the efficiency of whole system can be improved. Meanwhile, centralized filtering is conducive to downsize the filter, diminish the ripple of output voltage and decline the cost of system. In the proposed converter, the three-level voltage is superimposed by output voltages from the DC modules, which contributes to decrease the inductance current pulsation. With the introduction of series-parallel structure, and the effect of the failure of system is reduced. Moreover, the structure efficiently make the system easily-expansible and strong-versatile. The operation principle of the proposed system is discussed in detail in this paper and a prototype has been established. The test results verify the correctness of the proposed ideas.关键词
1500/V电压等级/集中滤波/三电平/正激变换器Key words
1500 V voltage level/centralized filter/three-level/forward converter分类
信息技术与安全科学引用本文复制引用
李龙春,嵇保健,洪峰,杨广浩..1500 V三电平正激变换器[J].电工技术学报,2018,33(9):2044-2054,11.基金项目
国家自然科学基金(51607086)和江苏省自然科学青年基金(BK20140944)资助项目. （51607086）
