基于EtherCAT环网的MMC故障检测与容错控制  

Fault Detection and Fault-Tolerant Control of MMC Based on EtherCAT Ring Network

作　　者：许文杰 张江娜 梅志敏[1] XU Wenjie;ZHANG Jiangna;MEI Zhimin(Information Engineering Institute,Wuchang Institute of Technology,Wuhan 430065,China;Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]武昌工学院信息工程学院,湖北武汉430065 [2]武汉科技大学,湖北武汉430081

出　　处：《现代信息科技》2023年第8期51-55,共5页Modern Information Technology

摘　　要：模块化多电平换流器(MMC)拓扑是目前高压、大容量电力电子装置的主要配置方案,但因其子模块数量较多且易发生故障,从而严重影响系统的稳定性和可靠性。文章通过将EtherCAT工业以太网技术引入到MMC控制系统,提出一种基于EtherCAT环网拓扑的MMC子模块分布式控制系统构架,它采用分布时钟的EtherCAT环网通信实现子模块控制单元的精确同步。针对子模块IGBT开路故障,优化后的时序逻辑可完成子模块故障信息反馈并大幅度缩短子模块故障切除时间,通过对通信链路设置故障冗余,子模块同步驱动信号和故障反馈信息得以稳定传输。最后,搭建了MMC仿真和实验平台,实验结果验证了EtherCAT环网控制MMC系统在子模块故障检测和容错控制的有效性与可行性。Modular Multi-Level Converter(MMC)topology is the main scheme of high voltage and large capacity power electronic devices,however,the sub-modules are many and easy to fail,which seriously affects the stability and reliability of the system.Through introducing EtherCAT industrial Ethernet technology into MMC control system,this paper proposes a MMC sub-module distributed control system architecture based on EtherCAT ring network topology.The precise synchronization of sub-module control units can be realized by using distributed clock EtherCAT ring network communication.Aiming at IGBT open-circuit fault of sub-module,the optimized sequential logic can complete the fault information feedback of sub-module and greatly shorten the fault removal time of sub-module.By setting fault redundancy for communication link,the synchronous driving signal and fault feedback information of sub-module can be transmitted stably.Finally,the simulation and experimental platform of MMC is built,and the experimental results verify the effectiveness and feasibility of EtherCAT ring network control MMC system in sub-module fault detection and fault-tolerant control.

关 键 词：模块化多电平换流器 EtherCAT环网 分布式控制 故障冗余 容错控制 

分 类 号：TM464[电气工程—电器]