新型输电线路故障测距系统的研制  

Development of the new fault location system based on Qnet

作　　者：许勇[1] 牛永会[1] 郭宁明[1] 孙爱春[1] 吕大伟[1] 冯志畅[1] 郑国太[1] 

机构地区：[1]国网电力科学研究院,江苏南京210061

出　　处：《电力系统保护与控制》2014年第12期119-125,共7页Power System Protection and Control

摘　　要：针对传统行波故障测距装置存在的一些问题,如采样率低造成直流线路故障不启动、不同厂家设备间数据无法共享、不能满足智能变电站接入等,提出并实现了一种设备间基于Qnet协议的新型行波故障测距系统。相对于传统行波故障测距系统,该系统采用超高采样频率、支持分布式接入,显著提高了测距装置接入的灵活度;对外通信协议全面满足IEC61850要求,数据存储格式采用comtrade标准格式,便于数据共享;用多尺度分析替代了传统的主导频带分析。模拟试验证明,该算法可深度优化测距结果,有效提高测距精度。The traditional fault location system has some problems, for example, insufficient sampling rate result in not trigging on DC line when fault happens, can＇t support distributed installation and communication protocol conform to IEC61850 standard in smart substation, and the data can＇t be shared between different manufacturers. A new type of fault location system based on Qnet protocol is introduced. The new fault location system has extreme high sampling rate, saves the fault data using comtrade style and accords with the IEC61850 standard, so the data can be easily shared. It is proved through test that the fault location precision is improved largely by using the multi-scale analysis algorithm.

关 键 词：行波 故障测距 超高速采样 Qnet 测距算法 智能变电站 

分 类 号：TM762.25[电气工程—电力系统及自动化]