一种继电保护复用通道瞬时性故障诊断方案

A transient fault diagnosis scheme for relay protection multiplex channel

复用通道结构复杂,传统通道故障定位方法耗时耗力。本文首先研究复用通道设备通信异常的判断机制,分析通道故障时的设备响应差异,设计对应通道诊断字节及其传输机理,实现了复用通道故障定位;针对实际运维提出通道故障录波方案,通道诊断字节变位触发故障录波,触发前后通道状态相关信息被记录并生成录波文件,高速采集和大容量存储硬件方案实现短时多次故障完整录波,通过中间节点信息文件及展示软件方便查看;通道诊断相关信息按规范建模,可传输至远方诊断。实验表明,本文提出的方案快速定位效果良好,不影响保护原有功能,具有推广价值。

The structure of the line protection multiplex channel is complicated,and the traditional method of locating the channel fault point is time/labor consumptive.In this paper the abnomal judging mechanism of the multiplex channel equipments is studied firstly,the difference in equipment response when the channel fails is analyzed,then the corresponding channel diagnostic byte and its transmission mechanism is designed,multiplex channel fault location is achieved.Considering the actual operation and maintenance situation,a channel fault recording scheme is further proposed,fault recording is triggered when channel diagnostic byte changes,and the information related to channel status before and after the trigger is recorded and a file is generated.Through high-speed acquisition and large-capacity storage hardware solution,even multiple transient failures occur in a short period of time,information can also be completely recorded,at the same time,intermediate node information file and its display software scheme is designed to facilitate the operator to view the relevant informations.Channel diagnosis-related information is modeled according to standardization and can be easily transmitted to the remote monitoring equipment for diagnosis.Experiment shows that the scheme proposed in this paper has a good effect in quickly channel fault diagnosis,does not affect the original function of protection,and has the value of promotion.