中国电机工程学报2018，Vol.38Issue(5)：1319-1328,后插5,11.DOI:10.13334/j.0258-8013.pcsee.172156
新型模块化多电平动态投切DC/DC变压器
A Novel Modular Multilevel Dynamic DC/DC Transformer
摘要
Abstract
The construction of DC power grid is an effective solution to integrate renewable energy and realize long distance and large capacity power transmission. DC/DC transformer is the key component to achieve different voltage level conversion. This paper proposed a new modular multilevel DC/DC transformer topology,which is based on sharing capacitors by both sides and modular dynamic switching principle. Besides different transformer topologies and control methods have been designed aiming at some specific application scenarios. Compared with isolated DC/DC structure based on modular multilevel converter, this novel transformer is simple in structure that reduces the number of devices significantly, and has the advantage of better economy, improved flexibility and simplified control loop. As the new transformer is able to regulate the transformer ratio flexibly, it can actively participate in DC power flow control. The feasibility and advance of the proposed DC transformer have been verified on the PSCAD/EMTDC simulation platform.关键词
直流电网/直流变压器/模块化多电平/潮流控制/非隔离型变压器Key words
DC grid/DC transformer/modular multilevel converter/power flow control/non-isolated transformer分类
信息技术与安全科学引用本文复制引用
李斌,张伟鑫..新型模块化多电平动态投切DC/DC变压器[J].中国电机工程学报,2018,38(5):1319-1328,后插5,11.基金项目
国家自然科学基金项目(51677126). Project Supported by National Natural Science Foundation of China (51677126). （51677126）
