电网技术2018，Vol.42Issue(3)：819-826,8.DOI:10.13335/j.1000-3673.pst.2017.1348
直流自耦变压器样机设计与实验验证
Design and Experimental Verification of DC Autotransformer Prototype
摘要
Abstract
To interconnect HVDC systems with different voltage levels, DC transformers are the most important devices. Among different topologies of DC transformers, DC autotransformer (DC AUTO) is one of the most promising technologies. This paper develops a DC-DC autotransformer prototype constructed with two-level voltage source converters (VSC). By blocking specific VSC converter, a bidirectional DC AUTO can be reconfigured to a unidirectional DC AUTO. Main circuit configuration of an experimental prototype is designed. Control strategies and control system architecture of each VSC for different operation modes are presented. And a dual-loop controller with current protection is proposed. The startup method and operating characteristics are analyzed. Feasibility of different topologies for DC AUTO is verified in experimental conditions, such as DC power step and reversal. Experiment results show that the prototypes have excellent static and dynamic performance under DC power step and DC power flow reversal.关键词
直流输电/直流电网/直流自耦变压器Key words
HVDC transmission/DC grid/DC autotransformer分类
信息技术与安全科学引用本文复制引用
周猛,左文平,向往,林卫星,文劲宇..直流自耦变压器样机设计与实验验证[J].电网技术,2018,42(3):819-826,8.基金项目
国家电网公司科技项目(NYN17201600314) （NYN17201600314）
中国博士后创新人才支持计划项目(BX201700088). Project Supported by State Grid Science & Technology Project (NYN17201600314) and the China Postdoctoral Innovation Talent Support Project (BX201700088). （BX201700088）
