三端线路光纤保护的研究  

RESEARCH OF RELAY PROTECTION OF THREE-TERMINAL POWER TRANSMISSION LINES USING OPTICAL FIBER CHANNEL

作　　者：郭征[1] 贺家李[1] 

机构地区：[1]天津大学电气与自动化工程学院,天津市300072

出　　处：《电力系统自动化》2003年第10期57-59,共3页Automation of Electric Power Systems

摘　　要：首先用节点电压法分析了一种典型三端线路结构的负序网络 ,提出了在该结构下发生内部故障时负序电流流出的判据 ,并据此得出在该结构下发生内部故障时负序方向元件一般不会误判的结论 ;然后提出在这种网络结构中可以将三端线路保护与另一双端线路保护相结合的综合保护方案 ;最后从经济性。Firstly, this paper analyzes the negative sequence equivalent network of a typical three-terminal line structure by nodal voltage method, and proposes a criterion of negative current flowing out during inner faults. The conclusion has been drawn out that negative sequence directional element usually can not make a wrong judgment during the inner faults in this kind of transmission line structure. Secondly, combining the protective relaying of three-terminal line and another parallel two-terminal line as a unit, an integrated protective scheme is proposed. Finally, all kinds of topologic structures of optic fiber network are analyzed and compared in their costs, complexity of software and hardware and synchronizing techniques.

关 键 词：电力系统 继电保护 线路保护 输电线路 三端线路 光纤保护 

分 类 号：TM773[电气工程—电力系统及自动化] TM726