摘要
过压-过流保护和过流-过压保护是本安电源过压、过流保护次序的2种形式,为研究不同的保护次序形式对本安电源安全性能的影响,建立了本安电源火花放电等效模型,确定了影响保护次序选择的本质安全性能因素。在发生过压、过流或同时发生过压与过流3种情况下,分别比较研究了2种保护次序的保护电路的性能,研究结果表明,在本安电源的设计中,过压、过流保护次序的选择并不是随机任意的,而是有原则可循的:过压保护电路的类型决定了本安电源过压、过流保护次序的选择,在设计中,首先要判断过压保护电路的类型,如果过压保护电路的类型是短路型,本安电源保护电路应设计成过流-过压的保护次序,否则应设计成过压-过流保护次序,过压-过流保护次序的保护电路截止关断时间更短,其保护效果更好,本安电源的安全性能更高。
Over-voltage and over-current protection are two forms of over-voltage and over-current protection sequences of intrinsic safety power supply.In order to study the influence of different protection sequence forms on safety performance of intrinsic safety power supply,an equivalent model of spark discharge of intrinsic safety power supply was established,and essential safety performance factors affected the selection of the protection sequences were determined.The protection performance of two protection sequences was compared and studied when happened over-voltage,over-current and over-voltage over-current.The research results show that in the design of intrinsic safety power supplies,the selection of over-voltage and over-current protection sequence is not random and arbitrary,but there are principles to follow:the type of over-voltage protection circuit determines the sequences of over-voltage and over-current protection of intrinsic safety power supplies.In design,the first step is determining the type of over-voltage protection circuit,if the type of over-voltage protection circuit is short circuit type,protection circuit of intrinsic safety power should be designed to protection sequences of over-current-over-voltage,otherwise it should be designed as over-voltage and over-current protection sequence,the protection circuit of the over-voltage and over-current protection sequence has a shorter turn-off time,the protection effect is better and the safety performance of the intrinsic safety power supply is higher.
作者
鲍常军
李吉平
耿文晶
于志学
崔世杰
BAO Changjun;LI Jiping;GENG Wenjing;YU Zhixue;CUI Shijie(State Grid East Inner Mongolia Electric Power Supply Co., Ltd., Hohhot 010020, China;Economic Technology Research Institute, State Grid East Inner Mongolia Electric Power Supply Co., Ltd., Hohhot 010020, China;Electric Power Research Institute, State Grid East Inner Mongolia Electric Power Supply Co., Ltd., Hohhot 010020, China;Weifang Branch,China Mobile Group Shandong Company Limited, Weifang 261000, China;College of Electrical and Automation Engineering, Shandong University of Science and Technology, Qingdao 266590,China)
出处
《工矿自动化》
北大核心
2019年第1期57-64,共8页
Journal Of Mine Automation
基金
山东科技大学研究生科技创新项目(2017SDKDYC17035)
关键词
本安电源
过压保护
过流保护
保护次序选择
保护电路类型
截止关断时间
intrinsic safety power supply
over-voltage protection
over-current protection
protection sequences selection
type of protection circuit
cut-off time
