零序差动保护在船舶电力系统的运用  

Application of Zero-Sequence Differential Protection in Ship Power System

作　　者：韩旗[1] 王德民[1] 莫文科[2] 

机构地区：[1]海军驻上海704所军事代表室,上海200031 [2]中国船舶重工集团公司第704研究所,上海200031

出　　处：《船舶工程》2015年第10期58-61,共4页Ship Engineering

摘　　要：文章提出在高阻接地船舶中压电力系统中采用零序差动电流保护作为接地故障的主保护。首先分析了零序差动保护的原理、接线、动作特性,以某船实际情况为例讨论了零序过流保护的局限性及零序差动保护的优越性。其次讨论了零序差动保护对零序电流互感器、继电保护装置的要求。最后通过基于RTLAB的硬件在环仿真验证了保护的性能。理论分析及算例验证都表明零序差动保护相较传统零序过流保护取得更好的保护选择性和快速性。The paper presents the using of the zero-sequence differential protection to be the main protection method of grounding fault in ship medium voltage power system with high resistance grounding. Firstly the paper introduces the protection principle, the electric connection and the action characteristic of zero-sequence differential protection. Secondly the request of zero-sequence current transformer and relay protection device for zero-sequence differential protection is analyzed. Finally the protection capability is validated by the hardware-in-the-loop test. The theoretical analysis and the example show that the zero-sequence differential protection has better selectivity and rapidity than the zero-sequence over current protection.

关 键 词：船舶电力系统 零序差动保护 中压交流 接地保护 

分 类 号：U665.12[交通运输工程—船舶及航道工程]