The design and fault ride through control of un-interrupted DC-DC Autotransformer

作     者：LI MengBo XIANG Wang ZUO WenPing YAO LiangZhong LIN WeiXing WEN JinYu 

作者机构：State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Renewable Energy Department China Electric Power Research Institute TBEA China Xinjiang Sunoasis Co. Ltd 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2018年第61卷第12期

页      面：1935-1949页

核心收录：

学科分类：08[工学] 0802[工学-机械工程] 

基　　金：supported by the State Grid Corporation of China Science and Technology Project(Grant No.NYN17201600314) the Initiative Postdocs Supporting Program(Grant No.BX201700088) 

主　　题：DC-DC power conversion DC Autotransformer HVDC converters DC fault control strategy 

摘      要：This paper proposed a novel type of DC-DC converter, termed as un-interrupted DC Autotransformer(un-interrupted DC AUTO), which has the capability to ride through DC fault on either side of the converter without blocking any devices. Besides that, the adequately designed converter retains the advantages of DC AUTO technology, namely reduced investment cost and transmission loss. To begin with, the topology and basic attributes of the un-interrupted DC AUTO are illustrated. Then the design goals and the corresponding design procedures are analyzed. Furthermore, an effective control system is proposed to enable the converter steady operation during both normal and faulted conditions. Finally, a 1000 MW ±320 kV/±640 kV test system is built on PSCAD/EMTDC platform to verify the technical feasibility of the proposed converter and the effectiveness of the control strategy.