多电站环形电网的保护

保护的选择性是船舶电网保护设计的一个重要因素。通过对船舶多电站环形电网的保护方式进行分析，提出了差动保护方式，并对差动保护的基本原理进行了简要分析，阐述了陆用差动保护技术的应用情况。通过结合船舶电力系统的特殊性，提出了相应的纵差和横差的保护方法，对环形电网采用差动保护和方向过流保护进行了简要分析，为船舶多电站环网保护设计提出了相应的思路。

Protection of Loop Network for Multiple Power Plants

The choice of protection mode is important in the design of marine electric power network. Analysis on the protection mode of loop network of multiple power plants is carried out. Modes of network differential protection are proposed, and the basic principle of this technology is summarized. The applications of differential protection technologies in the land- based facility are also introduced. Two modes both of longitudinal and transverse differential protection are further presented for marine application. Differential-current protection and ori- entation over-current protection in the loop network as well as thoughts on the network design are particularly addressed.