电工技术学报2018，Vol.33Issue(11)：2431-2438,8.DOI:10.19595/j.cnki.1000-6753.tces.170532
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
摘要
Abstract
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Key words
Voltage sags protection/AC contactor/uninterrupted switching/reverse external voltage turn-off/topology structure分类
信息技术与安全科学引用本文复制引用
杨东升,马占超,高筱婷,王智良,曾俊彦..交流接触器晃电保护无隙切换拓扑结构研究[J].电工技术学报,2018,33(11):2431-2438,8.基金项目
国家自然科学基金(61433004)、中央高校基本科研基金(N160402003)和新能源电力系统国家重点实验室开放课题(LAPS17013)资助项目. （61433004）
