行波故障测距功能插件的研制

Development of traveling-wave-based fault locating card

以微机线路保护装置和微机故障录波装置为依托,提出了高压线路行波故障测距功能插件的设计思想。该插件遵从高度独立运行的设计理念,自身带有中央处理单元(CPU)、高速采集、高精度时钟、开关量输入、开关量输出、通信接口以及电源变换等功能电路,并且通过嵌入式多任务操作系统对插件软件中的各项功能任务进行统一调度。以此为指导,对某微机线路保护装置进行了适当改造,进而研制出与之配套的行波测距功能插件。该插件通过保护装置母板获取来自保护装置电源插件的直流电源,并且通过串行通信接口(经母板)与保护装置的人机接口(HMI)模块通信。行波测距功能插件的应用,能够实现高压输电线路行波故障测距与线路保护或故障录波的一体化。

The design of traveling-wave-based fault locating card is proposed for high voltage lines,which is added on the microcomputer based line protection or fault recorder.With the concept of highly independent operation,it has own functional circuits：CPU,high speed data acquisition,high precision clock,digital inputs,digital outputs,communication interfaces,voltage converter,etc.,and applies an embedded operating system to coordinately dispatch various functional software tasks.A type of microcomputer based line protection is slightly reconstructed and a matched card is developed.The card fetches DC power from the mother board of the protection and communicates with the HMI unit via the mother board.Its application realizes the integration of fault locating and line protection or fault recording.