母线保护在船舶电力系统中的应用

Application of Bus-bar Protection in Shipboard Power System

文章认为在船舶中压交流系统中可采用母线差动保护作为应对汇流母排故障的主保护,提出了一种基于微机保护装置实现的适合复杂中压船舶电力系统的母线保护体系,该方案可兼顾保护选择性、速动性、可靠性。首先分析了母线差动保护原理、动作特性及保护接线方式,然后重点分析了母线保护的死区及其应对方法,最后针对船舶电力系统特殊环境讨论了增加母线保护可靠性的措施。分析结果可作为中压船舶电力系统保护设计的参考。

This paper argues that bus-bar differential protection is an effective measure to cope with the conflux bus-bar fault in shipboard medium voltage AC system.A realization of bus-bar protection is put forward based on microcomputer protection device,which is suitable for complex medium voltage power system.Firstly,the principle of bus-bar differential protection,the action characteristic and the connection mode in second side of TA are introduced.After that the dead zone of bus-bar protection and its counter measures are analyzed.Finally,the measures to increase the reliability of bus-bar protection are discussed according to the special environment of shipboard power system.The analysis results can be used as a reference for Shipboard Medium voltage AC power system protection design.