智能电网行波故障测距系统应用方案

输电线路故障测距系统是由测距终端装置和测距主站构成的,文中介绍了应用于智能电网的故障测距系统与传统测距系统的区别与改进。与现有系统相比,智能变电站内的测距终端装置在信号接入方面采用了分布式采样方式并提供了与电子式互感器的接口,在站内通信方面则解决了装置IEC 61850标准通信问题。同时,研究了在测距主站中利用区域电网信息提高测距系统整体可靠性的途径,并且利用暂态量信息进一步开发了故障分析系统,使其具备了初步的电网故障诊断能力。

Application of Transmission Lines Traveling Wave Fault Location System in Smart Grid

The transmission lines fault location system consists of fault location device and master station,the difference between the fault location system applied to smart grid and that of traditional system is presented.In comparing with existing system,in fault location device for smart station distributed sampling is adopted and access to electronic transformer is provided.In addition,device communication based on IEC 61850 standard in substation is also solved.In the meantime,the method to promote fault location system reliability with regional grid information in master station is also studied,and a failure analysis system is developed using transient quantity information,which results in ability for initial diagnosis ability of power grid fault.