中压大容量三重化三电平直流变换器冗余容错控制  

Redundant and Fault Tolerant Control of a Medium-Voltage High-Power Three-Phase Three-Level DC-DC Converter

作　　者：杨国润[1] 肖飞[1] 范学鑫[1] 王瑞田[1] 刘计龙[1] Yang Guorun;Xiao Fei;Fan Xuexin;Wang Ruitian;Liu Jilong(National Key Laboratory of Science and Technology on Vessel Integrated Power System,Naval University of Engineering,Wuhan,430033,China)

机构地区：[1]海军工程大学舰船综合电力技术国防科技重点实验室,武汉430033

出　　处：《电工技术学报》2017年第A01期186-195,共10页Transactions of China Electrotechnical Society

基　　金：国家重点基础研究发展计划(973计划)(2015CB251004);国家自然科学基金(51477180;51477179);新世纪优秀人才支持计划(NCET-11-0871)资助项目

摘　　要：三重化三电平直流变换器适用于高压直流输入、大电流直流输出的应用场合,其多模块交错并联组合的特点可有效提高系统工作的可靠性。为了切实体现这一优点,需实现该系统的冗余容错运行。首先从理论上分析交错角对系统冗余容错运行的影响,计算得到交错角的最佳值;继而提出一种电压电流双闭环PI控制加实时调节交错角的冗余容错控制策略,该控制策略依托于变换器的光纤环网通信分布式控制系统,保证了各模块的对等独立和功率均分,实现了变换器的冗余容错运行。最后通过一台MW级样机验证了所提控制策略的正确性和有效性。The three-phase three-level DC-DC converter is very suitable for high input voltageand high output current power conversion applications.Its characteristics of multi-module interleavedparallelcombination can significantly improve the reliability of the operation.To highlight theadvantage,we should execute the redundancy and fault tolerance.This paper firstly analyzed theimpact of the interleaved angle on the redundancy and fault tolerance,the best value of the interleavedangle was calculated.Then a novel method to achieve redundancy and fault tolerance was proposedbased on the voltage-current double-closed-loop proportional-integral(PI)control plus regulating theinterleaved angle.This method was implemented in a distributed control system based on ring netcommunication,which guaranteed the equality and current balance among all modules,and realized theredundant and fault tolerant operation of the converter.The proposed method is validated byexperimental results of a MW-level prototype.

关 键 词：三重化三电平直流变换器 冗余容错 交错角 分布式控制系统 

分 类 号：TM464[电气工程—电器]