交流接触器晃电保护无隙切换拓扑结构研究  

Research on Voltage Sag Protection Topology Based on Seamless Switching for AC Contactors

作　　者：杨东升[1] 马占超 高筱婷 王智良[1] 曾俊彦 Yang Dongsheng;Ma Zhanchao;Gao Xiaoting;Wang Zhiliang;Zeng Junyan(College of Information Science and Engineering Northeastern University Shenyang 110819 China;Huawei Technologies Co. Ltd Shenzhen 518129 China)

机构地区：[1]东北大学信息科学与工程学院,沈阳110819 [2]华为技术有限公司,深圳518129

出　　处：《电工技术学报》2018年第11期2431-2438,共8页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(61433004);中央高校基本科研基金(N160402003);新能源电力系统国家重点实验室开放课题(LAPS17013)资助项目

摘　　要：交流接触器是一种在电力系统中广泛应用的敏感性电气设备,由雷击、短路等原因引发的晃电故障易造成交流接触器误脱扣,导致连续工业生产过程的非计划停产,造成重大的经济损失。针对上述问题,该文在研究交流接触器电磁系统能量转换关系的基础上,提出一种交流接触器晃电保护的拓扑结构。该拓扑利用晶闸管的反向外电压关断特性,在主控制电路与备用控制电路的切换过程中,实现励磁电流连续无隙,确保交流接触器始终具有能量,保持吸合状态。此外,该文给出了无隙切换过程的控制方法,并进行了仿真和实验研究。仿真与实验结果验证了晃电保护拓扑结构的正确性及有效性,为高敏感度电力设备在连续生产过程中的不间断运行提供理论及应用参考。Highly sensitive electrical equipment represented by AC contactor is applied extensively in power system. Serious consequences and associated losses would be caused subsequently by contactor false tripping derived from voltage sag triggered by thunder-strike and short circuit. In this context, this paper discusses the energy conversion of the electromagnetic systems as the foundation of proposing a voltage sag protection topology based on seamless switching for AC contactor. The reverse external voltage turn-off characteristic of thyristor is utilized in the proposed topology. Therefore the exciting current is consecutive, enough energy could be obtained to maintain the closure of contactor during the switching procedure between the main control circuit and the alternate control circuit under voltage sags. Additionally, the control method of switching process are addressed. Detailed simulations and experiments have been carried out to validate the correctness and effectiveness of the proposed topology, as a theoretical and practical reference for uninterrupted operation of highly sensitive electrical equipment during consecutive industrial manufacturing.

关 键 词：晃电保护 交流接触器 无隙切换 反向外电压关断 拓扑结构 

分 类 号：TM572.2[电气工程—电器]